Vendor main dependencies.

vendor/github.com/Azure/go-autorest/autorest/autorest.go

@@ -0,0 +1,114 @@
+/*
+Package autorest implements an HTTP request pipeline suitable for use across multiple go-routines
+and provides the shared routines relied on by AutoRest (see https://github.com/Azure/autorest/)
+generated Go code.
+
+The package breaks sending and responding to HTTP requests into three phases: Preparing, Sending,
+and Responding. A typical pattern is:
+
+  req, err := Prepare(&http.Request{},
+    token.WithAuthorization())
+
+  resp, err := Send(req,
+    WithLogging(logger),
+    DoErrorIfStatusCode(http.StatusInternalServerError),
+    DoCloseIfError(),
+    DoRetryForAttempts(5, time.Second))
+
+  err = Respond(resp,
+    ByClosing())
+
+Each phase relies on decorators to modify and / or manage processing. Decorators may first modify
+and then pass the data along, pass the data first and then modify the result, or wrap themselves
+around passing the data (such as a logger might do). Decorators run in the order provided. For
+example, the following:
+
+  req, err := Prepare(&http.Request{},
+    WithBaseURL("https://microsoft.com/"),
+    WithPath("a"),
+    WithPath("b"),
+    WithPath("c"))
+
+will set the URL to:
+
+  https://microsoft.com/a/b/c
+
+Preparers and Responders may be shared and re-used (assuming the underlying decorators support
+sharing and re-use). Performant use is obtained by creating one or more Preparers and Responders
+shared among multiple go-routines, and a single Sender shared among multiple sending go-routines,
+all bound together by means of input / output channels.
+
+Decorators hold their passed state within a closure (such as the path components in the example
+above). Be careful to share Preparers and Responders only in a context where such held state
+applies. For example, it may not make sense to share a Preparer that applies a query string from a
+fixed set of values. Similarly, sharing a Responder that reads the response body into a passed
+struct (e.g., ByUnmarshallingJson) is likely incorrect.
+
+Lastly, the Swagger specification (https://swagger.io) that drives AutoRest
+(https://github.com/Azure/autorest/) precisely defines two date forms: date and date-time. The
+github.com/Azure/go-autorest/autorest/date package provides time.Time derivations to ensure
+correct parsing and formatting.
+
+Errors raised by autorest objects and methods will conform to the autorest.Error interface.
+
+See the included examples for more detail. For details on the suggested use of this package by
+generated clients, see the Client described below.
+*/
+package autorest
+
+import (
+	"net/http"
+	"time"
+)
+
+const (
+	// HeaderLocation specifies the HTTP Location header.
+	HeaderLocation = "Location"
+
+	// HeaderRetryAfter specifies the HTTP Retry-After header.
+	HeaderRetryAfter = "Retry-After"
+)
+
+// ResponseHasStatusCode returns true if the status code in the HTTP Response is in the passed set
+// and false otherwise.
+func ResponseHasStatusCode(resp *http.Response, codes ...int) bool {
+	return containsInt(codes, resp.StatusCode)
+}
+
+// GetLocation retrieves the URL from the Location header of the passed response.
+func GetLocation(resp *http.Response) string {
+	return resp.Header.Get(HeaderLocation)
+}
+
+// GetRetryAfter extracts the retry delay from the Retry-After header of the passed response. If
+// the header is absent or is malformed, it will return the supplied default delay time.Duration.
+func GetRetryAfter(resp *http.Response, defaultDelay time.Duration) time.Duration {
+	retry := resp.Header.Get(HeaderRetryAfter)
+	if retry == "" {
+		return defaultDelay
+	}
+
+	d, err := time.ParseDuration(retry + "s")
+	if err != nil {
+		return defaultDelay
+	}
+
+	return d
+}
+
+// NewPollingRequest allocates and returns a new http.Request to poll for the passed response.
+func NewPollingRequest(resp *http.Response, cancel <-chan struct{}) (*http.Request, error) {
+	location := GetLocation(resp)
+	if location == "" {
+		return nil, NewErrorWithResponse("autorest", "NewPollingRequest", resp, "Location header missing from response that requires polling")
+	}
+
+	req, err := Prepare(&http.Request{Cancel: cancel},
+		AsGet(),
+		WithBaseURL(location))
+	if err != nil {
+		return nil, NewErrorWithError(err, "autorest", "NewPollingRequest", nil, "Failure creating poll request to %s", location)
+	}
+
+	return req, nil
+}

vendor/github.com/Azure/go-autorest/autorest/azure/async.go

@@ -0,0 +1,307 @@
+package azure
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/Azure/go-autorest/autorest"
+	"github.com/Azure/go-autorest/autorest/date"
+	"io/ioutil"
+	"net/http"
+	"strings"
+	"time"
+)
+
+const (
+	headerAsyncOperation = "Azure-AsyncOperation"
+)
+
+const (
+	methodDelete = "DELETE"
+	methodPatch  = "PATCH"
+	methodPost   = "POST"
+	methodPut    = "PUT"
+	methodGet    = "GET"
+
+	operationInProgress string = "InProgress"
+	operationCanceled   string = "Canceled"
+	operationFailed     string = "Failed"
+	operationSucceeded  string = "Succeeded"
+)
+
+// DoPollForAsynchronous returns a SendDecorator that polls if the http.Response is for an Azure
+// long-running operation. It will delay between requests for the duration specified in the
+// RetryAfter header or, if the header is absent, the passed delay. Polling may be canceled by
+// closing the optional channel on the http.Request.
+func DoPollForAsynchronous(delay time.Duration) autorest.SendDecorator {
+	return func(s autorest.Sender) autorest.Sender {
+		return autorest.SenderFunc(func(r *http.Request) (resp *http.Response, err error) {
+			resp, err = s.Do(r)
+			if err != nil {
+				return resp, err
+			}
+			pollingCodes := []int{http.StatusAccepted, http.StatusCreated, http.StatusOK}
+			if !autorest.ResponseHasStatusCode(resp, pollingCodes...) {
+				return resp, nil
+			}
+
+			ps := pollingState{}
+			for err == nil {
+				err = updatePollingState(resp, &ps)
+				if err != nil {
+					break
+				}
+				if ps.hasTerminated() {
+					if !ps.hasSucceeded() {
+						err = ps
+					}
+					break
+				}
+
+				r, err = newPollingRequest(resp, ps)
+				if err != nil {
+					return resp, err
+				}
+
+				delay = autorest.GetRetryAfter(resp, delay)
+				resp, err = autorest.SendWithSender(s, r,
+					autorest.AfterDelay(delay))
+			}
+
+			return resp, err
+		})
+	}
+}
+
+func getAsyncOperation(resp *http.Response) string {
+	return resp.Header.Get(http.CanonicalHeaderKey(headerAsyncOperation))
+}
+
+func hasSucceeded(state string) bool {
+	return state == operationSucceeded
+}
+
+func hasTerminated(state string) bool {
+	switch state {
+	case operationCanceled, operationFailed, operationSucceeded:
+		return true
+	default:
+		return false
+	}
+}
+
+func hasFailed(state string) bool {
+	return state == operationFailed
+}
+
+type provisioningTracker interface {
+	state() string
+	hasSucceeded() bool
+	hasTerminated() bool
+}
+
+type operationResource struct {
+	// Note:
+	// 	The specification states services should return the "id" field. However some return it as
+	// 	"operationId".
+	ID              string                 `json:"id"`
+	OperationID     string                 `json:"operationId"`
+	Name            string                 `json:"name"`
+	Status          string                 `json:"status"`
+	Properties      map[string]interface{} `json:"properties"`
+	OperationError  ServiceError           `json:"error"`
+	StartTime       date.Time              `json:"startTime"`
+	EndTime         date.Time              `json:"endTime"`
+	PercentComplete float64                `json:"percentComplete"`
+}
+
+func (or operationResource) state() string {
+	return or.Status
+}
+
+func (or operationResource) hasSucceeded() bool {
+	return hasSucceeded(or.state())
+}
+
+func (or operationResource) hasTerminated() bool {
+	return hasTerminated(or.state())
+}
+
+type provisioningProperties struct {
+	ProvisioningState string `json:"provisioningState"`
+}
+
+type provisioningStatus struct {
+	Properties        provisioningProperties `json:"properties,omitempty"`
+	ProvisioningError ServiceError           `json:"error,omitempty"`
+}
+
+func (ps provisioningStatus) state() string {
+	return ps.Properties.ProvisioningState
+}
+
+func (ps provisioningStatus) hasSucceeded() bool {
+	return hasSucceeded(ps.state())
+}
+
+func (ps provisioningStatus) hasTerminated() bool {
+	return hasTerminated(ps.state())
+}
+
+func (ps provisioningStatus) hasProvisioningError() bool {
+	return ps.ProvisioningError != ServiceError{}
+}
+
+type pollingResponseFormat string
+
+const (
+	usesOperationResponse  pollingResponseFormat = "OperationResponse"
+	usesProvisioningStatus pollingResponseFormat = "ProvisioningStatus"
+	formatIsUnknown        pollingResponseFormat = ""
+)
+
+type pollingState struct {
+	responseFormat pollingResponseFormat
+	uri            string
+	state          string
+	code           string
+	message        string
+}
+
+func (ps pollingState) hasSucceeded() bool {
+	return hasSucceeded(ps.state)
+}
+
+func (ps pollingState) hasTerminated() bool {
+	return hasTerminated(ps.state)
+}
+
+func (ps pollingState) hasFailed() bool {
+	return hasFailed(ps.state)
+}
+
+func (ps pollingState) Error() string {
+	return fmt.Sprintf("Long running operation terminated with status '%s': Code=%q Message=%q", ps.state, ps.code, ps.message)
+}
+
+//	updatePollingState maps the operation status -- retrieved from either a provisioningState
+// 	field, the status field of an OperationResource, or inferred from the HTTP status code --
+// 	into a well-known states. Since the process begins from the initial request, the state
+//	always comes from either a the provisioningState returned or is inferred from the HTTP
+//	status code. Subsequent requests will read an Azure OperationResource object if the
+//	service initially returned the Azure-AsyncOperation header. The responseFormat field notes
+//	the expected response format.
+func updatePollingState(resp *http.Response, ps *pollingState) error {
+	// Determine the response shape
+	// -- The first response will always be a provisioningStatus response; only the polling requests,
+	//    depending on the header returned, may be something otherwise.
+	var pt provisioningTracker
+	if ps.responseFormat == usesOperationResponse {
+		pt = &operationResource{}
+	} else {
+		pt = &provisioningStatus{}
+	}
+
+	// If this is the first request (that is, the polling response shape is unknown), determine how
+	// to poll and what to expect
+	if ps.responseFormat == formatIsUnknown {
+		req := resp.Request
+		if req == nil {
+			return autorest.NewError("azure", "updatePollingState", "Azure Polling Error - Original HTTP request is missing")
+		}
+
+		// Prefer the Azure-AsyncOperation header
+		ps.uri = getAsyncOperation(resp)
+		if ps.uri != "" {
+			ps.responseFormat = usesOperationResponse
+		} else {
+			ps.responseFormat = usesProvisioningStatus
+		}
+
+		// Else, use the Location header
+		if ps.uri == "" {
+			ps.uri = autorest.GetLocation(resp)
+		}
+
+		// Lastly, requests against an existing resource, use the last request URI
+		if ps.uri == "" {
+			m := strings.ToUpper(req.Method)
+			if m == methodPatch || m == methodPut || m == methodGet {
+				ps.uri = req.URL.String()
+			}
+		}
+	}
+
+	// Read and interpret the response (saving the Body in case no polling is necessary)
+	b := &bytes.Buffer{}
+	err := autorest.Respond(resp,
+		autorest.ByCopying(b),
+		autorest.ByUnmarshallingJSON(pt),
+		autorest.ByClosing())
+	resp.Body = ioutil.NopCloser(b)
+	if err != nil {
+		return err
+	}
+
+	// Interpret the results
+	// -- Terminal states apply regardless
+	// -- Unknown states are per-service inprogress states
+	// -- Otherwise, infer state from HTTP status code
+	if pt.hasTerminated() {
+		ps.state = pt.state()
+	} else if pt.state() != "" {
+		ps.state = operationInProgress
+	} else {
+		switch resp.StatusCode {
+		case http.StatusAccepted:
+			ps.state = operationInProgress
+
+		case http.StatusNoContent, http.StatusCreated, http.StatusOK:
+			ps.state = operationSucceeded
+
+		default:
+			ps.state = operationFailed
+		}
+	}
+
+	if ps.state == operationInProgress && ps.uri == "" {
+		return autorest.NewError("azure", "updatePollingState", "Azure Polling Error - Unable to obtain polling URI for %s %s", resp.Request.Method, resp.Request.URL)
+	}
+
+	// For failed operation, check for error code and message in
+	// -- Operation resource
+	// -- Response
+	// -- Otherwise, Unknown
+	if ps.hasFailed() {
+		if ps.responseFormat == usesOperationResponse {
+			or := pt.(*operationResource)
+			ps.code = or.OperationError.Code
+			ps.message = or.OperationError.Message
+		} else {
+			p := pt.(*provisioningStatus)
+			if p.hasProvisioningError() {
+				ps.code = p.ProvisioningError.Code
+				ps.message = p.ProvisioningError.Message
+			} else {
+				ps.code = "Unknown"
+				ps.message = "None"
+			}
+		}
+	}
+	return nil
+}
+
+func newPollingRequest(resp *http.Response, ps pollingState) (*http.Request, error) {
+	req := resp.Request
+	if req == nil {
+		return nil, autorest.NewError("azure", "newPollingRequest", "Azure Polling Error - Original HTTP request is missing")
+	}
+
+	reqPoll, err := autorest.Prepare(&http.Request{Cancel: req.Cancel},
+		autorest.AsGet(),
+		autorest.WithBaseURL(ps.uri))
+	if err != nil {
+		return nil, autorest.NewErrorWithError(err, "azure", "newPollingRequest", nil, "Failure creating poll request to %s", ps.uri)
+	}
+
+	return reqPoll, nil
+}

vendor/github.com/Azure/go-autorest/autorest/azure/azure.go

@@ -0,0 +1,180 @@
+/*
+Package azure provides Azure-specific implementations used with AutoRest.
+
+See the included examples for more detail.
+*/
+package azure
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"strconv"
+
+	"github.com/Azure/go-autorest/autorest"
+)
+
+const (
+	// HeaderClientID is the Azure extension header to set a user-specified request ID.
+	HeaderClientID = "x-ms-client-request-id"
+
+	// HeaderReturnClientID is the Azure extension header to set if the user-specified request ID
+	// should be included in the response.
+	HeaderReturnClientID = "x-ms-return-client-request-id"
+
+	// HeaderRequestID is the Azure extension header of the service generated request ID returned
+	// in the response.
+	HeaderRequestID = "x-ms-request-id"
+)
+
+// ServiceError encapsulates the error response from an Azure service.
+type ServiceError struct {
+	Code    string         `json:"code"`
+	Message string         `json:"message"`
+	Details *[]interface{} `json:"details"`
+}
+
+func (se ServiceError) Error() string {
+	if se.Details != nil {
+		d, err := json.Marshal(*(se.Details))
+		if err != nil {
+			return fmt.Sprintf("Code=%q Message=%q Details=%v", se.Code, se.Message, *se.Details)
+		}
+		return fmt.Sprintf("Code=%q Message=%q Details=%v", se.Code, se.Message, string(d))
+	}
+	return fmt.Sprintf("Code=%q Message=%q", se.Code, se.Message)
+}
+
+// RequestError describes an error response returned by Azure service.
+type RequestError struct {
+	autorest.DetailedError
+
+	// The error returned by the Azure service.
+	ServiceError *ServiceError `json:"error"`
+
+	// The request id (from the x-ms-request-id-header) of the request.
+	RequestID string
+}
+
+// Error returns a human-friendly error message from service error.
+func (e RequestError) Error() string {
+	return fmt.Sprintf("autorest/azure: Service returned an error. Status=%v %v",
+		e.StatusCode, e.ServiceError)
+}
+
+// IsAzureError returns true if the passed error is an Azure Service error; false otherwise.
+func IsAzureError(e error) bool {
+	_, ok := e.(*RequestError)
+	return ok
+}
+
+// NewErrorWithError creates a new Error conforming object from the
+// passed packageType, method, statusCode of the given resp (UndefinedStatusCode
+// if resp is nil), message, and original error. message is treated as a format
+// string to which the optional args apply.
+func NewErrorWithError(original error, packageType string, method string, resp *http.Response, message string, args ...interface{}) RequestError {
+	if v, ok := original.(*RequestError); ok {
+		return *v
+	}
+
+	statusCode := autorest.UndefinedStatusCode
+	if resp != nil {
+		statusCode = resp.StatusCode
+	}
+	return RequestError{
+		DetailedError: autorest.DetailedError{
+			Original:    original,
+			PackageType: packageType,
+			Method:      method,
+			StatusCode:  statusCode,
+			Message:     fmt.Sprintf(message, args...),
+		},
+	}
+}
+
+// WithReturningClientID returns a PrepareDecorator that adds an HTTP extension header of
+// x-ms-client-request-id whose value is the passed, undecorated UUID (e.g.,
+// "0F39878C-5F76-4DB8-A25D-61D2C193C3CA"). It also sets the x-ms-return-client-request-id
+// header to true such that UUID accompanies the http.Response.
+func WithReturningClientID(uuid string) autorest.PrepareDecorator {
+	preparer := autorest.CreatePreparer(
+		WithClientID(uuid),
+		WithReturnClientID(true))
+
+	return func(p autorest.Preparer) autorest.Preparer {
+		return autorest.PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			r, err := p.Prepare(r)
+			if err != nil {
+				return r, err
+			}
+			return preparer.Prepare(r)
+		})
+	}
+}
+
+// WithClientID returns a PrepareDecorator that adds an HTTP extension header of
+// x-ms-client-request-id whose value is passed, undecorated UUID (e.g.,
+// "0F39878C-5F76-4DB8-A25D-61D2C193C3CA").
+func WithClientID(uuid string) autorest.PrepareDecorator {
+	return autorest.WithHeader(HeaderClientID, uuid)
+}
+
+// WithReturnClientID returns a PrepareDecorator that adds an HTTP extension header of
+// x-ms-return-client-request-id whose boolean value indicates if the value of the
+// x-ms-client-request-id header should be included in the http.Response.
+func WithReturnClientID(b bool) autorest.PrepareDecorator {
+	return autorest.WithHeader(HeaderReturnClientID, strconv.FormatBool(b))
+}
+
+// ExtractClientID extracts the client identifier from the x-ms-client-request-id header set on the
+// http.Request sent to the service (and returned in the http.Response)
+func ExtractClientID(resp *http.Response) string {
+	return autorest.ExtractHeaderValue(HeaderClientID, resp)
+}
+
+// ExtractRequestID extracts the Azure server generated request identifier from the
+// x-ms-request-id header.
+func ExtractRequestID(resp *http.Response) string {
+	return autorest.ExtractHeaderValue(HeaderRequestID, resp)
+}
+
+// WithErrorUnlessStatusCode returns a RespondDecorator that emits an
+// azure.RequestError by reading the response body unless the response HTTP status code
+// is among the set passed.
+//
+// If there is a chance service may return responses other than the Azure error
+// format and the response cannot be parsed into an error, a decoding error will
+// be returned containing the response body. In any case, the Responder will
+// return an error if the status code is not satisfied.
+//
+// If this Responder returns an error, the response body will be replaced with
+// an in-memory reader, which needs no further closing.
+func WithErrorUnlessStatusCode(codes ...int) autorest.RespondDecorator {
+	return func(r autorest.Responder) autorest.Responder {
+		return autorest.ResponderFunc(func(resp *http.Response) error {
+			err := r.Respond(resp)
+			if err == nil && !autorest.ResponseHasStatusCode(resp, codes...) {
+				var e RequestError
+				defer resp.Body.Close()
+
+				// Copy and replace the Body in case it does not contain an error object.
+				// This will leave the Body available to the caller.
+				b, decodeErr := autorest.CopyAndDecode(autorest.EncodedAsJSON, resp.Body, &e)
+				resp.Body = ioutil.NopCloser(&b)
+				if decodeErr != nil {
+					return fmt.Errorf("autorest/azure: error response cannot be parsed: %q error: %v", b.String(), decodeErr)
+				} else if e.ServiceError == nil {
+					e.ServiceError = &ServiceError{Code: "Unknown", Message: "Unknown service error"}
+				}
+
+				e.RequestID = ExtractRequestID(resp)
+				if e.StatusCode == nil {
+					e.StatusCode = resp.StatusCode
+				}
+				err = &e
+			}
+			return err
+		})
+	}
+}

vendor/github.com/Azure/go-autorest/autorest/azure/config.go

@@ -0,0 +1,13 @@
+package azure
+
+import (
+	"net/url"
+)
+
+// OAuthConfig represents the endpoints needed
+// in OAuth operations
+type OAuthConfig struct {
+	AuthorizeEndpoint  url.URL
+	TokenEndpoint      url.URL
+	DeviceCodeEndpoint url.URL
+}

vendor/github.com/Azure/go-autorest/autorest/azure/devicetoken.go

@@ -0,0 +1,193 @@
+package azure
+
+/*
+  This file is largely based on rjw57/oauth2device's code, with the follow differences:
+   * scope -> resource, and only allow a single one
+   * receive "Message" in the DeviceCode struct and show it to users as the prompt
+   * azure-xplat-cli has the following behavior that this emulates:
+     - does not send client_secret during the token exchange
+     - sends resource again in the token exchange request
+*/
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"time"
+
+	"github.com/Azure/go-autorest/autorest"
+)
+
+const (
+	logPrefix = "autorest/azure/devicetoken:"
+)
+
+var (
+	// ErrDeviceGeneric represents an unknown error from the token endpoint when using device flow
+	ErrDeviceGeneric = fmt.Errorf("%s Error while retrieving OAuth token: Unknown Error", logPrefix)
+
+	// ErrDeviceAccessDenied represents an access denied error from the token endpoint when using device flow
+	ErrDeviceAccessDenied = fmt.Errorf("%s Error while retrieving OAuth token: Access Denied", logPrefix)
+
+	// ErrDeviceAuthorizationPending represents the server waiting on the user to complete the device flow
+	ErrDeviceAuthorizationPending = fmt.Errorf("%s Error while retrieving OAuth token: Authorization Pending", logPrefix)
+
+	// ErrDeviceCodeExpired represents the server timing out and expiring the code during device flow
+	ErrDeviceCodeExpired = fmt.Errorf("%s Error while retrieving OAuth token: Code Expired", logPrefix)
+
+	// ErrDeviceSlowDown represents the service telling us we're polling too often during device flow
+	ErrDeviceSlowDown = fmt.Errorf("%s Error while retrieving OAuth token: Slow Down", logPrefix)
+
+	errCodeSendingFails   = "Error occurred while sending request for Device Authorization Code"
+	errCodeHandlingFails  = "Error occurred while handling response from the Device Endpoint"
+	errTokenSendingFails  = "Error occurred while sending request with device code for a token"
+	errTokenHandlingFails = "Error occurred while handling response from the Token Endpoint (during device flow)"
+)
+
+// DeviceCode is the object returned by the device auth endpoint
+// It contains information to instruct the user to complete the auth flow
+type DeviceCode struct {
+	DeviceCode      *string `json:"device_code,omitempty"`
+	UserCode        *string `json:"user_code,omitempty"`
+	VerificationURL *string `json:"verification_url,omitempty"`
+	ExpiresIn       *int64  `json:"expires_in,string,omitempty"`
+	Interval        *int64  `json:"interval,string,omitempty"`
+
+	Message     *string `json:"message"` // Azure specific
+	Resource    string  // store the following, stored when initiating, used when exchanging
+	OAuthConfig OAuthConfig
+	ClientID    string
+}
+
+// TokenError is the object returned by the token exchange endpoint
+// when something is amiss
+type TokenError struct {
+	Error            *string `json:"error,omitempty"`
+	ErrorCodes       []int   `json:"error_codes,omitempty"`
+	ErrorDescription *string `json:"error_description,omitempty"`
+	Timestamp        *string `json:"timestamp,omitempty"`
+	TraceID          *string `json:"trace_id,omitempty"`
+}
+
+// DeviceToken is the object return by the token exchange endpoint
+// It can either look like a Token or an ErrorToken, so put both here
+// and check for presence of "Error" to know if we are in error state
+type deviceToken struct {
+	Token
+	TokenError
+}
+
+// InitiateDeviceAuth initiates a device auth flow. It returns a DeviceCode
+// that can be used with CheckForUserCompletion or WaitForUserCompletion.
+func InitiateDeviceAuth(client *autorest.Client, oauthConfig OAuthConfig, clientID, resource string) (*DeviceCode, error) {
+	req, _ := autorest.Prepare(
+		&http.Request{},
+		autorest.AsPost(),
+		autorest.AsFormURLEncoded(),
+		autorest.WithBaseURL(oauthConfig.DeviceCodeEndpoint.String()),
+		autorest.WithFormData(url.Values{
+			"client_id": []string{clientID},
+			"resource":  []string{resource},
+		}),
+	)
+
+	resp, err := autorest.SendWithSender(client, req)
+	if err != nil {
+		return nil, fmt.Errorf("%s %s: %s", logPrefix, errCodeSendingFails, err)
+	}
+
+	var code DeviceCode
+	err = autorest.Respond(
+		resp,
+		autorest.WithErrorUnlessStatusCode(http.StatusOK),
+		autorest.ByUnmarshallingJSON(&code),
+		autorest.ByClosing())
+	if err != nil {
+		return nil, fmt.Errorf("%s %s: %s", logPrefix, errCodeHandlingFails, err)
+	}
+
+	code.ClientID = clientID
+	code.Resource = resource
+	code.OAuthConfig = oauthConfig
+
+	return &code, nil
+}
+
+// CheckForUserCompletion takes a DeviceCode and checks with the Azure AD OAuth endpoint
+// to see if the device flow has: been completed, timed out, or otherwise failed
+func CheckForUserCompletion(client *autorest.Client, code *DeviceCode) (*Token, error) {
+	req, _ := autorest.Prepare(
+		&http.Request{},
+		autorest.AsPost(),
+		autorest.AsFormURLEncoded(),
+		autorest.WithBaseURL(code.OAuthConfig.TokenEndpoint.String()),
+		autorest.WithFormData(url.Values{
+			"client_id":  []string{code.ClientID},
+			"code":       []string{*code.DeviceCode},
+			"grant_type": []string{OAuthGrantTypeDeviceCode},
+			"resource":   []string{code.Resource},
+		}),
+	)
+
+	resp, err := autorest.SendWithSender(client, req)
+	if err != nil {
+		return nil, fmt.Errorf("%s %s: %s", logPrefix, errTokenSendingFails, err)
+	}
+
+	var token deviceToken
+	err = autorest.Respond(
+		resp,
+		autorest.WithErrorUnlessStatusCode(http.StatusOK, http.StatusBadRequest),
+		autorest.ByUnmarshallingJSON(&token),
+		autorest.ByClosing())
+	if err != nil {
+		return nil, fmt.Errorf("%s %s: %s", logPrefix, errTokenHandlingFails, err)
+	}
+
+	if token.Error == nil {
+		return &token.Token, nil
+	}
+
+	switch *token.Error {
+	case "authorization_pending":
+		return nil, ErrDeviceAuthorizationPending
+	case "slow_down":
+		return nil, ErrDeviceSlowDown
+	case "access_denied":
+		return nil, ErrDeviceAccessDenied
+	case "code_expired":
+		return nil, ErrDeviceCodeExpired
+	default:
+		return nil, ErrDeviceGeneric
+	}
+}
+
+// WaitForUserCompletion calls CheckForUserCompletion repeatedly until a token is granted or an error state occurs.
+// This prevents the user from looping and checking against 'ErrDeviceAuthorizationPending'.
+func WaitForUserCompletion(client *autorest.Client, code *DeviceCode) (*Token, error) {
+	intervalDuration := time.Duration(*code.Interval) * time.Second
+	waitDuration := intervalDuration
+
+	for {
+		token, err := CheckForUserCompletion(client, code)
+
+		if err == nil {
+			return token, nil
+		}
+
+		switch err {
+		case ErrDeviceSlowDown:
+			waitDuration += waitDuration
+		case ErrDeviceAuthorizationPending:
+			// noop
+		default: // everything else is "fatal" to us
+			return nil, err
+		}
+
+		if waitDuration > (intervalDuration * 3) {
+			return nil, fmt.Errorf("%s Error waiting for user to complete device flow. Server told us to slow_down too much", logPrefix)
+		}
+
+		time.Sleep(waitDuration)
+	}
+}

vendor/github.com/Azure/go-autorest/autorest/azure/environments.go

@@ -0,0 +1,162 @@
+package azure
+
+import (
+	"fmt"
+	"net/url"
+	"strings"
+)
+
+const (
+	activeDirectoryAPIVersion = "1.0"
+)
+
+var environments = map[string]Environment{
+	"AZURECHINACLOUD":        ChinaCloud,
+	"AZUREGERMANCLOUD":       GermanCloud,
+	"AZUREPUBLICCLOUD":       PublicCloud,
+	"AZUREUSGOVERNMENTCLOUD": USGovernmentCloud,
+}
+
+// Environment represents a set of endpoints for each of Azure's Clouds.
+type Environment struct {
+	Name                         string `json:"name"`
+	ManagementPortalURL          string `json:"managementPortalURL"`
+	PublishSettingsURL           string `json:"publishSettingsURL"`
+	ServiceManagementEndpoint    string `json:"serviceManagementEndpoint"`
+	ResourceManagerEndpoint      string `json:"resourceManagerEndpoint"`
+	ActiveDirectoryEndpoint      string `json:"activeDirectoryEndpoint"`
+	GalleryEndpoint              string `json:"galleryEndpoint"`
+	KeyVaultEndpoint             string `json:"keyVaultEndpoint"`
+	GraphEndpoint                string `json:"graphEndpoint"`
+	StorageEndpointSuffix        string `json:"storageEndpointSuffix"`
+	SQLDatabaseDNSSuffix         string `json:"sqlDatabaseDNSSuffix"`
+	TrafficManagerDNSSuffix      string `json:"trafficManagerDNSSuffix"`
+	KeyVaultDNSSuffix            string `json:"keyVaultDNSSuffix"`
+	ServiceBusEndpointSuffix     string `json:"serviceBusEndpointSuffix"`
+	ServiceManagementVMDNSSuffix string `json:"serviceManagementVMDNSSuffix"`
+	ResourceManagerVMDNSSuffix   string `json:"resourceManagerVMDNSSuffix"`
+}
+
+var (
+	// PublicCloud is the default public Azure cloud environment
+	PublicCloud = Environment{
+		Name:                         "AzurePublicCloud",
+		ManagementPortalURL:          "https://manage.windowsazure.com/",
+		PublishSettingsURL:           "https://manage.windowsazure.com/publishsettings/index",
+		ServiceManagementEndpoint:    "https://management.core.windows.net/",
+		ResourceManagerEndpoint:      "https://management.azure.com/",
+		ActiveDirectoryEndpoint:      "https://login.microsoftonline.com/",
+		GalleryEndpoint:              "https://gallery.azure.com/",
+		KeyVaultEndpoint:             "https://vault.azure.net/",
+		GraphEndpoint:                "https://graph.windows.net/",
+		StorageEndpointSuffix:        "core.windows.net",
+		SQLDatabaseDNSSuffix:         "database.windows.net",
+		TrafficManagerDNSSuffix:      "trafficmanager.net",
+		KeyVaultDNSSuffix:            "vault.azure.net",
+		ServiceBusEndpointSuffix:     "servicebus.azure.com",
+		ServiceManagementVMDNSSuffix: "cloudapp.net",
+		ResourceManagerVMDNSSuffix:   "cloudapp.azure.com",
+	}
+
+	// USGovernmentCloud is the cloud environment for the US Government
+	USGovernmentCloud = Environment{
+		Name:                         "AzureUSGovernmentCloud",
+		ManagementPortalURL:          "https://manage.windowsazure.us/",
+		PublishSettingsURL:           "https://manage.windowsazure.us/publishsettings/index",
+		ServiceManagementEndpoint:    "https://management.core.usgovcloudapi.net/",
+		ResourceManagerEndpoint:      "https://management.usgovcloudapi.net/",
+		ActiveDirectoryEndpoint:      "https://login.microsoftonline.com/",
+		GalleryEndpoint:              "https://gallery.usgovcloudapi.net/",
+		KeyVaultEndpoint:             "https://vault.usgovcloudapi.net/",
+		GraphEndpoint:                "https://graph.usgovcloudapi.net/",
+		StorageEndpointSuffix:        "core.usgovcloudapi.net",
+		SQLDatabaseDNSSuffix:         "database.usgovcloudapi.net",
+		TrafficManagerDNSSuffix:      "usgovtrafficmanager.net",
+		KeyVaultDNSSuffix:            "vault.usgovcloudapi.net",
+		ServiceBusEndpointSuffix:     "servicebus.usgovcloudapi.net",
+		ServiceManagementVMDNSSuffix: "usgovcloudapp.net",
+		ResourceManagerVMDNSSuffix:   "cloudapp.windowsazure.us",
+	}
+
+	// ChinaCloud is the cloud environment operated in China
+	ChinaCloud = Environment{
+		Name:                         "AzureChinaCloud",
+		ManagementPortalURL:          "https://manage.chinacloudapi.com/",
+		PublishSettingsURL:           "https://manage.chinacloudapi.com/publishsettings/index",
+		ServiceManagementEndpoint:    "https://management.core.chinacloudapi.cn/",
+		ResourceManagerEndpoint:      "https://management.chinacloudapi.cn/",
+		ActiveDirectoryEndpoint:      "https://login.chinacloudapi.cn/?api-version=1.0",
+		GalleryEndpoint:              "https://gallery.chinacloudapi.cn/",
+		KeyVaultEndpoint:             "https://vault.azure.cn/",
+		GraphEndpoint:                "https://graph.chinacloudapi.cn/",
+		StorageEndpointSuffix:        "core.chinacloudapi.cn",
+		SQLDatabaseDNSSuffix:         "database.chinacloudapi.cn",
+		TrafficManagerDNSSuffix:      "trafficmanager.cn",
+		KeyVaultDNSSuffix:            "vault.azure.cn",
+		ServiceBusEndpointSuffix:     "servicebus.chinacloudapi.net",
+		ServiceManagementVMDNSSuffix: "chinacloudapp.cn",
+		ResourceManagerVMDNSSuffix:   "cloudapp.azure.cn",
+	}
+
+	// GermanCloud is the cloud environment operated in Germany
+	GermanCloud = Environment{
+		Name:                         "AzureGermanCloud",
+		ManagementPortalURL:          "http://portal.microsoftazure.de/",
+		PublishSettingsURL:           "https://manage.microsoftazure.de/publishsettings/index",
+		ServiceManagementEndpoint:    "https://management.core.cloudapi.de/",
+		ResourceManagerEndpoint:      "https://management.microsoftazure.de/",
+		ActiveDirectoryEndpoint:      "https://login.microsoftonline.de/",
+		GalleryEndpoint:              "https://gallery.cloudapi.de/",
+		KeyVaultEndpoint:             "https://vault.microsoftazure.de/",
+		GraphEndpoint:                "https://graph.cloudapi.de/",
+		StorageEndpointSuffix:        "core.cloudapi.de",
+		SQLDatabaseDNSSuffix:         "database.cloudapi.de",
+		TrafficManagerDNSSuffix:      "azuretrafficmanager.de",
+		KeyVaultDNSSuffix:            "vault.microsoftazure.de",
+		ServiceBusEndpointSuffix:     "servicebus.cloudapi.de",
+		ServiceManagementVMDNSSuffix: "azurecloudapp.de",
+		ResourceManagerVMDNSSuffix:   "cloudapp.microsoftazure.de",
+	}
+)
+
+// EnvironmentFromName returns an Environment based on the common name specified
+func EnvironmentFromName(name string) (Environment, error) {
+	name = strings.ToUpper(name)
+	env, ok := environments[name]
+	if !ok {
+		return env, fmt.Errorf("autorest/azure: There is no cloud environment matching the name %q", name)
+	}
+	return env, nil
+}
+
+// OAuthConfigForTenant returns an OAuthConfig with tenant specific urls
+func (env Environment) OAuthConfigForTenant(tenantID string) (*OAuthConfig, error) {
+	return OAuthConfigForTenant(env.ActiveDirectoryEndpoint, tenantID)
+}
+
+// OAuthConfigForTenant returns an OAuthConfig with tenant specific urls for target cloud auth endpoint
+func OAuthConfigForTenant(activeDirectoryEndpoint, tenantID string) (*OAuthConfig, error) {
+	template := "%s/oauth2/%s?api-version=%s"
+	u, err := url.Parse(activeDirectoryEndpoint)
+	if err != nil {
+		return nil, err
+	}
+	authorizeURL, err := u.Parse(fmt.Sprintf(template, tenantID, "authorize", activeDirectoryAPIVersion))
+	if err != nil {
+		return nil, err
+	}
+	tokenURL, err := u.Parse(fmt.Sprintf(template, tenantID, "token", activeDirectoryAPIVersion))
+	if err != nil {
+		return nil, err
+	}
+	deviceCodeURL, err := u.Parse(fmt.Sprintf(template, tenantID, "devicecode", activeDirectoryAPIVersion))
+	if err != nil {
+		return nil, err
+	}
+
+	return &OAuthConfig{
+		AuthorizeEndpoint:  *authorizeURL,
+		TokenEndpoint:      *tokenURL,
+		DeviceCodeEndpoint: *deviceCodeURL,
+	}, nil
+}

vendor/github.com/Azure/go-autorest/autorest/azure/persist.go

@@ -0,0 +1,59 @@
+package azure
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+)
+
+// LoadToken restores a Token object from a file located at 'path'.
+func LoadToken(path string) (*Token, error) {
+	file, err := os.Open(path)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open file (%s) while loading token: %v", path, err)
+	}
+	defer file.Close()
+
+	var token Token
+
+	dec := json.NewDecoder(file)
+	if err = dec.Decode(&token); err != nil {
+		return nil, fmt.Errorf("failed to decode contents of file (%s) into Token representation: %v", path, err)
+	}
+	return &token, nil
+}
+
+// SaveToken persists an oauth token at the given location on disk.
+// It moves the new file into place so it can safely be used to replace an existing file
+// that maybe accessed by multiple processes.
+func SaveToken(path string, mode os.FileMode, token Token) error {
+	dir := filepath.Dir(path)
+	err := os.MkdirAll(dir, os.ModePerm)
+	if err != nil {
+		return fmt.Errorf("failed to create directory (%s) to store token in: %v", dir, err)
+	}
+
+	newFile, err := ioutil.TempFile(dir, "token")
+	if err != nil {
+		return fmt.Errorf("failed to create the temp file to write the token: %v", err)
+	}
+	tempPath := newFile.Name()
+
+	if err := json.NewEncoder(newFile).Encode(token); err != nil {
+		return fmt.Errorf("failed to encode token to file (%s) while saving token: %v", tempPath, err)
+	}
+	if err := newFile.Close(); err != nil {
+		return fmt.Errorf("failed to close temp file %s: %v", tempPath, err)
+	}
+
+	// Atomic replace to avoid multi-writer file corruptions
+	if err := os.Rename(tempPath, path); err != nil {
+		return fmt.Errorf("failed to move temporary token to desired output location. src=%s dst=%s: %v", tempPath, path, err)
+	}
+	if err := os.Chmod(path, mode); err != nil {
+		return fmt.Errorf("failed to chmod the token file %s: %v", path, err)
+	}
+	return nil
+}

vendor/github.com/Azure/go-autorest/autorest/azure/token.go

@@ -0,0 +1,363 @@
+package azure
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/sha1"
+	"crypto/x509"
+	"encoding/base64"
+	"fmt"
+	"net/http"
+	"net/url"
+	"strconv"
+	"time"
+
+	"github.com/Azure/go-autorest/autorest"
+	"github.com/dgrijalva/jwt-go"
+)
+
+const (
+	defaultRefresh = 5 * time.Minute
+	tokenBaseDate  = "1970-01-01T00:00:00Z"
+
+	// OAuthGrantTypeDeviceCode is the "grant_type" identifier used in device flow
+	OAuthGrantTypeDeviceCode = "device_code"
+
+	// OAuthGrantTypeClientCredentials is the "grant_type" identifier used in credential flows
+	OAuthGrantTypeClientCredentials = "client_credentials"
+
+	// OAuthGrantTypeRefreshToken is the "grant_type" identifier used in refresh token flows
+	OAuthGrantTypeRefreshToken = "refresh_token"
+)
+
+var expirationBase time.Time
+
+func init() {
+	expirationBase, _ = time.Parse(time.RFC3339, tokenBaseDate)
+}
+
+// TokenRefreshCallback is the type representing callbacks that will be called after
+// a successful token refresh
+type TokenRefreshCallback func(Token) error
+
+// Token encapsulates the access token used to authorize Azure requests.
+type Token struct {
+	AccessToken  string `json:"access_token"`
+	RefreshToken string `json:"refresh_token"`
+
+	ExpiresIn string `json:"expires_in"`
+	ExpiresOn string `json:"expires_on"`
+	NotBefore string `json:"not_before"`
+
+	Resource string `json:"resource"`
+	Type     string `json:"token_type"`
+}
+
+// Expires returns the time.Time when the Token expires.
+func (t Token) Expires() time.Time {
+	s, err := strconv.Atoi(t.ExpiresOn)
+	if err != nil {
+		s = -3600
+	}
+	return expirationBase.Add(time.Duration(s) * time.Second).UTC()
+}
+
+// IsExpired returns true if the Token is expired, false otherwise.
+func (t Token) IsExpired() bool {
+	return t.WillExpireIn(0)
+}
+
+// WillExpireIn returns true if the Token will expire after the passed time.Duration interval
+// from now, false otherwise.
+func (t Token) WillExpireIn(d time.Duration) bool {
+	return !t.Expires().After(time.Now().Add(d))
+}
+
+// WithAuthorization returns a PrepareDecorator that adds an HTTP Authorization header whose
+// value is "Bearer " followed by the AccessToken of the Token.
+func (t *Token) WithAuthorization() autorest.PrepareDecorator {
+	return func(p autorest.Preparer) autorest.Preparer {
+		return autorest.PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			return (autorest.WithBearerAuthorization(t.AccessToken)(p)).Prepare(r)
+		})
+	}
+}
+
+// ServicePrincipalNoSecret represents a secret type that contains no secret
+// meaning it is not valid for fetching a fresh token. This is used by Manual
+type ServicePrincipalNoSecret struct {
+}
+
+// SetAuthenticationValues is a method of the interface ServicePrincipalSecret
+// It only returns an error for the ServicePrincipalNoSecret type
+func (noSecret *ServicePrincipalNoSecret) SetAuthenticationValues(spt *ServicePrincipalToken, v *url.Values) error {
+	return fmt.Errorf("Manually created ServicePrincipalToken does not contain secret material to retrieve a new access token")
+}
+
+// ServicePrincipalSecret is an interface that allows various secret mechanism to fill the form
+// that is submitted when acquiring an oAuth token.
+type ServicePrincipalSecret interface {
+	SetAuthenticationValues(spt *ServicePrincipalToken, values *url.Values) error
+}
+
+// ServicePrincipalTokenSecret implements ServicePrincipalSecret for client_secret type authorization.
+type ServicePrincipalTokenSecret struct {
+	ClientSecret string
+}
+
+// SetAuthenticationValues is a method of the interface ServicePrincipalSecret.
+// It will populate the form submitted during oAuth Token Acquisition using the client_secret.
+func (tokenSecret *ServicePrincipalTokenSecret) SetAuthenticationValues(spt *ServicePrincipalToken, v *url.Values) error {
+	v.Set("client_secret", tokenSecret.ClientSecret)
+	return nil
+}
+
+// ServicePrincipalCertificateSecret implements ServicePrincipalSecret for generic RSA cert auth with signed JWTs.
+type ServicePrincipalCertificateSecret struct {
+	Certificate *x509.Certificate
+	PrivateKey  *rsa.PrivateKey
+}
+
+// SignJwt returns the JWT signed with the certificate's private key.
+func (secret *ServicePrincipalCertificateSecret) SignJwt(spt *ServicePrincipalToken) (string, error) {
+	hasher := sha1.New()
+	_, err := hasher.Write(secret.Certificate.Raw)
+	if err != nil {
+		return "", err
+	}
+
+	thumbprint := base64.URLEncoding.EncodeToString(hasher.Sum(nil))
+
+	// The jti (JWT ID) claim provides a unique identifier for the JWT.
+	jti := make([]byte, 20)
+	_, err = rand.Read(jti)
+	if err != nil {
+		return "", err
+	}
+
+	token := jwt.New(jwt.SigningMethodRS256)
+	token.Header["x5t"] = thumbprint
+	token.Claims = jwt.MapClaims{
+		"aud": spt.oauthConfig.TokenEndpoint.String(),
+		"iss": spt.clientID,
+		"sub": spt.clientID,
+		"jti": base64.URLEncoding.EncodeToString(jti),
+		"nbf": time.Now().Unix(),
+		"exp": time.Now().Add(time.Hour * 24).Unix(),
+	}
+
+	signedString, err := token.SignedString(secret.PrivateKey)
+	return signedString, err
+}
+
+// SetAuthenticationValues is a method of the interface ServicePrincipalSecret.
+// It will populate the form submitted during oAuth Token Acquisition using a JWT signed with a certificate.
+func (secret *ServicePrincipalCertificateSecret) SetAuthenticationValues(spt *ServicePrincipalToken, v *url.Values) error {
+	jwt, err := secret.SignJwt(spt)
+	if err != nil {
+		return err
+	}
+
+	v.Set("client_assertion", jwt)
+	v.Set("client_assertion_type", "urn:ietf:params:oauth:client-assertion-type:jwt-bearer")
+	return nil
+}
+
+// ServicePrincipalToken encapsulates a Token created for a Service Principal.
+type ServicePrincipalToken struct {
+	Token
+
+	secret        ServicePrincipalSecret
+	oauthConfig   OAuthConfig
+	clientID      string
+	resource      string
+	autoRefresh   bool
+	refreshWithin time.Duration
+	sender        autorest.Sender
+
+	refreshCallbacks []TokenRefreshCallback
+}
+
+// NewServicePrincipalTokenWithSecret create a ServicePrincipalToken using the supplied ServicePrincipalSecret implementation.
+func NewServicePrincipalTokenWithSecret(oauthConfig OAuthConfig, id string, resource string, secret ServicePrincipalSecret, callbacks ...TokenRefreshCallback) (*ServicePrincipalToken, error) {
+	spt := &ServicePrincipalToken{
+		oauthConfig:      oauthConfig,
+		secret:           secret,
+		clientID:         id,
+		resource:         resource,
+		autoRefresh:      true,
+		refreshWithin:    defaultRefresh,
+		sender:           &http.Client{},
+		refreshCallbacks: callbacks,
+	}
+	return spt, nil
+}
+
+// NewServicePrincipalTokenFromManualToken creates a ServicePrincipalToken using the supplied token
+func NewServicePrincipalTokenFromManualToken(oauthConfig OAuthConfig, clientID string, resource string, token Token, callbacks ...TokenRefreshCallback) (*ServicePrincipalToken, error) {
+	spt, err := NewServicePrincipalTokenWithSecret(
+		oauthConfig,
+		clientID,
+		resource,
+		&ServicePrincipalNoSecret{},
+		callbacks...)
+	if err != nil {
+		return nil, err
+	}
+
+	spt.Token = token
+
+	return spt, nil
+}
+
+// NewServicePrincipalToken creates a ServicePrincipalToken from the supplied Service Principal
+// credentials scoped to the named resource.
+func NewServicePrincipalToken(oauthConfig OAuthConfig, clientID string, secret string, resource string, callbacks ...TokenRefreshCallback) (*ServicePrincipalToken, error) {
+	return NewServicePrincipalTokenWithSecret(
+		oauthConfig,
+		clientID,
+		resource,
+		&ServicePrincipalTokenSecret{
+			ClientSecret: secret,
+		},
+		callbacks...,
+	)
+}
+
+// NewServicePrincipalTokenFromCertificate create a ServicePrincipalToken from the supplied pkcs12 bytes.
+func NewServicePrincipalTokenFromCertificate(oauthConfig OAuthConfig, clientID string, certificate *x509.Certificate, privateKey *rsa.PrivateKey, resource string, callbacks ...TokenRefreshCallback) (*ServicePrincipalToken, error) {
+	return NewServicePrincipalTokenWithSecret(
+		oauthConfig,
+		clientID,
+		resource,
+		&ServicePrincipalCertificateSecret{
+			PrivateKey:  privateKey,
+			Certificate: certificate,
+		},
+		callbacks...,
+	)
+}
+
+// EnsureFresh will refresh the token if it will expire within the refresh window (as set by
+// RefreshWithin).
+func (spt *ServicePrincipalToken) EnsureFresh() error {
+	if spt.WillExpireIn(spt.refreshWithin) {
+		return spt.Refresh()
+	}
+	return nil
+}
+
+// InvokeRefreshCallbacks calls any TokenRefreshCallbacks that were added to the SPT during initialization
+func (spt *ServicePrincipalToken) InvokeRefreshCallbacks(token Token) error {
+	if spt.refreshCallbacks != nil {
+		for _, callback := range spt.refreshCallbacks {
+			err := callback(spt.Token)
+			if err != nil {
+				return autorest.NewErrorWithError(err,
+					"azure.ServicePrincipalToken", "InvokeRefreshCallbacks", nil, "A TokenRefreshCallback handler returned an error")
+			}
+		}
+	}
+	return nil
+}
+
+// Refresh obtains a fresh token for the Service Principal.
+func (spt *ServicePrincipalToken) Refresh() error {
+	return spt.refreshInternal(spt.resource)
+}
+
+// RefreshExchange refreshes the token, but for a different resource.
+func (spt *ServicePrincipalToken) RefreshExchange(resource string) error {
+	return spt.refreshInternal(resource)
+}
+
+func (spt *ServicePrincipalToken) refreshInternal(resource string) error {
+	v := url.Values{}
+	v.Set("client_id", spt.clientID)
+	v.Set("resource", resource)
+
+	if spt.RefreshToken != "" {
+		v.Set("grant_type", OAuthGrantTypeRefreshToken)
+		v.Set("refresh_token", spt.RefreshToken)
+	} else {
+		v.Set("grant_type", OAuthGrantTypeClientCredentials)
+		err := spt.secret.SetAuthenticationValues(spt, &v)
+		if err != nil {
+			return err
+		}
+	}
+
+	req, _ := autorest.Prepare(&http.Request{},
+		autorest.AsPost(),
+		autorest.AsFormURLEncoded(),
+		autorest.WithBaseURL(spt.oauthConfig.TokenEndpoint.String()),
+		autorest.WithFormData(v))
+
+	resp, err := autorest.SendWithSender(spt.sender, req)
+	if err != nil {
+		return autorest.NewErrorWithError(err,
+			"azure.ServicePrincipalToken", "Refresh", resp, "Failure sending request for Service Principal %s",
+			spt.clientID)
+	}
+
+	var newToken Token
+	err = autorest.Respond(resp,
+		autorest.WithErrorUnlessStatusCode(http.StatusOK),
+		autorest.ByUnmarshallingJSON(&newToken),
+		autorest.ByClosing())
+	if err != nil {
+		return autorest.NewErrorWithError(err,
+			"azure.ServicePrincipalToken", "Refresh", resp, "Failure handling response to Service Principal %s request",
+			spt.clientID)
+	}
+
+	spt.Token = newToken
+
+	err = spt.InvokeRefreshCallbacks(newToken)
+	if err != nil {
+		// its already wrapped inside InvokeRefreshCallbacks
+		return err
+	}
+
+	return nil
+}
+
+// SetAutoRefresh enables or disables automatic refreshing of stale tokens.
+func (spt *ServicePrincipalToken) SetAutoRefresh(autoRefresh bool) {
+	spt.autoRefresh = autoRefresh
+}
+
+// SetRefreshWithin sets the interval within which if the token will expire, EnsureFresh will
+// refresh the token.
+func (spt *ServicePrincipalToken) SetRefreshWithin(d time.Duration) {
+	spt.refreshWithin = d
+	return
+}
+
+// SetSender sets the autorest.Sender used when obtaining the Service Principal token. An
+// undecorated http.Client is used by default.
+func (spt *ServicePrincipalToken) SetSender(s autorest.Sender) {
+	spt.sender = s
+}
+
+// WithAuthorization returns a PrepareDecorator that adds an HTTP Authorization header whose
+// value is "Bearer " followed by the AccessToken of the ServicePrincipalToken.
+//
+// By default, the token will automatically refresh if nearly expired (as determined by the
+// RefreshWithin interval). Use the AutoRefresh method to enable or disable automatically refreshing
+// tokens.
+func (spt *ServicePrincipalToken) WithAuthorization() autorest.PrepareDecorator {
+	return func(p autorest.Preparer) autorest.Preparer {
+		return autorest.PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			if spt.autoRefresh {
+				err := spt.EnsureFresh()
+				if err != nil {
+					return r, autorest.NewErrorWithError(err,
+						"azure.ServicePrincipalToken", "WithAuthorization", nil, "Failed to refresh Service Principal Token for request to %s",
+						r.URL)
+				}
+			}
+			return (autorest.WithBearerAuthorization(spt.AccessToken)(p)).Prepare(r)
+		})
+	}
+}

vendor/github.com/Azure/go-autorest/autorest/client.go

@@ -0,0 +1,212 @@
+package autorest
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"net/http/cookiejar"
+	"time"
+)
+
+const (
+	// DefaultPollingDelay is a reasonable delay between polling requests.
+	DefaultPollingDelay = 60 * time.Second
+
+	// DefaultPollingDuration is a reasonable total polling duration.
+	DefaultPollingDuration = 15 * time.Minute
+
+	// DefaultRetryAttempts is number of attempts for retry status codes (5xx).
+	DefaultRetryAttempts = 3
+)
+
+var statusCodesForRetry = []int{
+	http.StatusRequestTimeout,      // 408
+	http.StatusInternalServerError, // 500
+	http.StatusBadGateway,          // 502
+	http.StatusServiceUnavailable,  // 503
+	http.StatusGatewayTimeout,      // 504
+}
+
+const (
+	requestFormat = `HTTP Request Begin ===================================================
+%s
+===================================================== HTTP Request End
+`
+	responseFormat = `HTTP Response Begin ===================================================
+%s
+===================================================== HTTP Response End
+`
+)
+
+// Response serves as the base for all responses from generated clients. It provides access to the
+// last http.Response.
+type Response struct {
+	*http.Response `json:"-"`
+}
+
+// LoggingInspector implements request and response inspectors that log the full request and
+// response to a supplied log.
+type LoggingInspector struct {
+	Logger *log.Logger
+}
+
+// WithInspection returns a PrepareDecorator that emits the http.Request to the supplied logger. The
+// body is restored after being emitted.
+//
+// Note: Since it reads the entire Body, this decorator should not be used where body streaming is
+// important. It is best used to trace JSON or similar body values.
+func (li LoggingInspector) WithInspection() PrepareDecorator {
+	return func(p Preparer) Preparer {
+		return PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			var body, b bytes.Buffer
+
+			defer r.Body.Close()
+
+			r.Body = ioutil.NopCloser(io.TeeReader(r.Body, &body))
+			if err := r.Write(&b); err != nil {
+				return nil, fmt.Errorf("Failed to write response: %v", err)
+			}
+
+			li.Logger.Printf(requestFormat, b.String())
+
+			r.Body = ioutil.NopCloser(&body)
+			return p.Prepare(r)
+		})
+	}
+}
+
+// ByInspecting returns a RespondDecorator that emits the http.Response to the supplied logger. The
+// body is restored after being emitted.
+//
+// Note: Since it reads the entire Body, this decorator should not be used where body streaming is
+// important. It is best used to trace JSON or similar body values.
+func (li LoggingInspector) ByInspecting() RespondDecorator {
+	return func(r Responder) Responder {
+		return ResponderFunc(func(resp *http.Response) error {
+			var body, b bytes.Buffer
+			defer resp.Body.Close()
+			resp.Body = ioutil.NopCloser(io.TeeReader(resp.Body, &body))
+			if err := resp.Write(&b); err != nil {
+				return fmt.Errorf("Failed to write response: %v", err)
+			}
+
+			li.Logger.Printf(responseFormat, b.String())
+
+			resp.Body = ioutil.NopCloser(&body)
+			return r.Respond(resp)
+		})
+	}
+}
+
+// Client is the base for autorest generated clients. It provides default, "do nothing"
+// implementations of an Authorizer, RequestInspector, and ResponseInspector. It also returns the
+// standard, undecorated http.Client as a default Sender.
+//
+// Generated clients should also use Error (see NewError and NewErrorWithError) for errors and
+// return responses that compose with Response.
+//
+// Most customization of generated clients is best achieved by supplying a custom Authorizer, custom
+// RequestInspector, and / or custom ResponseInspector. Users may log requests, implement circuit
+// breakers (see https://msdn.microsoft.com/en-us/library/dn589784.aspx) or otherwise influence
+// sending the request by providing a decorated Sender.
+type Client struct {
+	Authorizer        Authorizer
+	Sender            Sender
+	RequestInspector  PrepareDecorator
+	ResponseInspector RespondDecorator
+
+	// PollingDelay sets the polling frequency used in absence of a Retry-After HTTP header
+	PollingDelay time.Duration
+
+	// PollingDuration sets the maximum polling time after which an error is returned.
+	PollingDuration time.Duration
+
+	// RetryAttempts sets the default number of retry attempts for client.
+	RetryAttempts int
+
+	// RetryDuration sets the delay duration for retries.
+	RetryDuration time.Duration
+
+	// UserAgent, if not empty, will be set as the HTTP User-Agent header on all requests sent
+	// through the Do method.
+	UserAgent string
+
+	Jar http.CookieJar
+}
+
+// NewClientWithUserAgent returns an instance of a Client with the UserAgent set to the passed
+// string.
+func NewClientWithUserAgent(ua string) Client {
+	return Client{
+		PollingDelay:    DefaultPollingDelay,
+		PollingDuration: DefaultPollingDuration,
+		RetryAttempts:   DefaultRetryAttempts,
+		RetryDuration:   30 * time.Second,
+		UserAgent:       ua,
+	}
+}
+
+// Do implements the Sender interface by invoking the active Sender after applying authorization.
+// If Sender is not set, it uses a new instance of http.Client. In both cases it will, if UserAgent
+// is set, apply set the User-Agent header.
+func (c Client) Do(r *http.Request) (*http.Response, error) {
+	if r.UserAgent() == "" {
+		r, _ = Prepare(r,
+			WithUserAgent(c.UserAgent))
+	}
+	r, err := Prepare(r,
+		c.WithInspection(),
+		c.WithAuthorization())
+	if err != nil {
+		return nil, NewErrorWithError(err, "autorest/Client", "Do", nil, "Preparing request failed")
+	}
+	resp, err := SendWithSender(c.sender(), r,
+		DoRetryForStatusCodes(c.RetryAttempts, c.RetryDuration, statusCodesForRetry...))
+	Respond(resp,
+		c.ByInspecting())
+	return resp, err
+}
+
+// sender returns the Sender to which to send requests.
+func (c Client) sender() Sender {
+	if c.Sender == nil {
+		j, _ := cookiejar.New(nil)
+		return &http.Client{Jar: j}
+	}
+	return c.Sender
+}
+
+// WithAuthorization is a convenience method that returns the WithAuthorization PrepareDecorator
+// from the current Authorizer. If not Authorizer is set, it uses the NullAuthorizer.
+func (c Client) WithAuthorization() PrepareDecorator {
+	return c.authorizer().WithAuthorization()
+}
+
+// authorizer returns the Authorizer to use.
+func (c Client) authorizer() Authorizer {
+	if c.Authorizer == nil {
+		return NullAuthorizer{}
+	}
+	return c.Authorizer
+}
+
+// WithInspection is a convenience method that passes the request to the supplied RequestInspector,
+// if present, or returns the WithNothing PrepareDecorator otherwise.
+func (c Client) WithInspection() PrepareDecorator {
+	if c.RequestInspector == nil {
+		return WithNothing()
+	}
+	return c.RequestInspector
+}
+
+// ByInspecting is a convenience method that passes the response to the supplied ResponseInspector,
+// if present, or returns the ByIgnoring RespondDecorator otherwise.
+func (c Client) ByInspecting() RespondDecorator {
+	if c.ResponseInspector == nil {
+		return ByIgnoring()
+	}
+	return c.ResponseInspector
+}

vendor/github.com/Azure/go-autorest/autorest/date/date.go

@@ -0,0 +1,82 @@
+/*
+Package date provides time.Time derivatives that conform to the Swagger.io (https://swagger.io/)
+defined date   formats: Date and DateTime. Both types may, in most cases, be used in lieu of
+time.Time types. And both convert to time.Time through a ToTime method.
+*/
+package date
+
+import (
+	"fmt"
+	"time"
+)
+
+const (
+	fullDate     = "2006-01-02"
+	fullDateJSON = `"2006-01-02"`
+	dateFormat   = "%04d-%02d-%02d"
+	jsonFormat   = `"%04d-%02d-%02d"`
+)
+
+// Date defines a type similar to time.Time but assumes a layout of RFC3339 full-date (i.e.,
+// 2006-01-02).
+type Date struct {
+	time.Time
+}
+
+// ParseDate create a new Date from the passed string.
+func ParseDate(date string) (d Date, err error) {
+	return parseDate(date, fullDate)
+}
+
+func parseDate(date string, format string) (Date, error) {
+	d, err := time.Parse(format, date)
+	return Date{Time: d}, err
+}
+
+// MarshalBinary preserves the Date as a byte array conforming to RFC3339 full-date (i.e.,
+// 2006-01-02).
+func (d Date) MarshalBinary() ([]byte, error) {
+	return d.MarshalText()
+}
+
+// UnmarshalBinary reconstitutes a Date saved as a byte array conforming to RFC3339 full-date (i.e.,
+// 2006-01-02).
+func (d *Date) UnmarshalBinary(data []byte) error {
+	return d.UnmarshalText(data)
+}
+
+// MarshalJSON preserves the Date as a JSON string conforming to RFC3339 full-date (i.e.,
+// 2006-01-02).
+func (d Date) MarshalJSON() (json []byte, err error) {
+	return []byte(fmt.Sprintf(jsonFormat, d.Year(), d.Month(), d.Day())), nil
+}
+
+// UnmarshalJSON reconstitutes the Date from a JSON string conforming to RFC3339 full-date (i.e.,
+// 2006-01-02).
+func (d *Date) UnmarshalJSON(data []byte) (err error) {
+	d.Time, err = time.Parse(fullDateJSON, string(data))
+	return err
+}
+
+// MarshalText preserves the Date as a byte array conforming to RFC3339 full-date (i.e.,
+// 2006-01-02).
+func (d Date) MarshalText() (text []byte, err error) {
+	return []byte(fmt.Sprintf(dateFormat, d.Year(), d.Month(), d.Day())), nil
+}
+
+// UnmarshalText reconstitutes a Date saved as a byte array conforming to RFC3339 full-date (i.e.,
+// 2006-01-02).
+func (d *Date) UnmarshalText(data []byte) (err error) {
+	d.Time, err = time.Parse(fullDate, string(data))
+	return err
+}
+
+// String returns the Date formatted as an RFC3339 full-date string (i.e., 2006-01-02).
+func (d Date) String() string {
+	return fmt.Sprintf(dateFormat, d.Year(), d.Month(), d.Day())
+}
+
+// ToTime returns a Date as a time.Time
+func (d Date) ToTime() time.Time {
+	return d.Time
+}

vendor/github.com/Azure/go-autorest/autorest/date/time.go

@@ -0,0 +1,89 @@
+package date
+
+import (
+	"regexp"
+	"time"
+)
+
+// Azure reports time in UTC but it doesn't include the 'Z' time zone suffix in some cases.
+const (
+	azureUtcFormatJSON = `"2006-01-02T15:04:05.999999999"`
+	azureUtcFormat     = "2006-01-02T15:04:05.999999999"
+	rfc3339JSON        = `"` + time.RFC3339Nano + `"`
+	rfc3339            = time.RFC3339Nano
+	tzOffsetRegex      = `(Z|z|\+|-)(\d+:\d+)*"*$`
+)
+
+// Time defines a type similar to time.Time but assumes a layout of RFC3339 date-time (i.e.,
+// 2006-01-02T15:04:05Z).
+type Time struct {
+	time.Time
+}
+
+// MarshalBinary preserves the Time as a byte array conforming to RFC3339 date-time (i.e.,
+// 2006-01-02T15:04:05Z).
+func (t Time) MarshalBinary() ([]byte, error) {
+	return t.Time.MarshalText()
+}
+
+// UnmarshalBinary reconstitutes a Time saved as a byte array conforming to RFC3339 date-time
+// (i.e., 2006-01-02T15:04:05Z).
+func (t *Time) UnmarshalBinary(data []byte) error {
+	return t.UnmarshalText(data)
+}
+
+// MarshalJSON preserves the Time as a JSON string conforming to RFC3339 date-time (i.e.,
+// 2006-01-02T15:04:05Z).
+func (t Time) MarshalJSON() (json []byte, err error) {
+	return t.Time.MarshalJSON()
+}
+
+// UnmarshalJSON reconstitutes the Time from a JSON string conforming to RFC3339 date-time
+// (i.e., 2006-01-02T15:04:05Z).
+func (t *Time) UnmarshalJSON(data []byte) (err error) {
+	timeFormat := azureUtcFormatJSON
+	match, err := regexp.Match(tzOffsetRegex, data)
+	if err != nil {
+		return err
+	} else if match {
+		timeFormat = rfc3339JSON
+	}
+	t.Time, err = ParseTime(timeFormat, string(data))
+	return err
+}
+
+// MarshalText preserves the Time as a byte array conforming to RFC3339 date-time (i.e.,
+// 2006-01-02T15:04:05Z).
+func (t Time) MarshalText() (text []byte, err error) {
+	return t.Time.MarshalText()
+}
+
+// UnmarshalText reconstitutes a Time saved as a byte array conforming to RFC3339 date-time
+// (i.e., 2006-01-02T15:04:05Z).
+func (t *Time) UnmarshalText(data []byte) (err error) {
+	timeFormat := azureUtcFormat
+	match, err := regexp.Match(tzOffsetRegex, data)
+	if err != nil {
+		return err
+	} else if match {
+		timeFormat = rfc3339
+	}
+	t.Time, err = ParseTime(timeFormat, string(data))
+	return err
+}
+
+// String returns the Time formatted as an RFC3339 date-time string (i.e.,
+// 2006-01-02T15:04:05Z).
+func (t Time) String() string {
+	// Note: time.Time.String does not return an RFC3339 compliant string, time.Time.MarshalText does.
+	b, err := t.MarshalText()
+	if err != nil {
+		return ""
+	}
+	return string(b)
+}
+
+// ToTime returns a Time as a time.Time
+func (t Time) ToTime() time.Time {
+	return t.Time
+}

vendor/github.com/Azure/go-autorest/autorest/date/timerfc1123.go

@@ -0,0 +1,86 @@
+package date
+
+import (
+	"errors"
+	"time"
+)
+
+const (
+	rfc1123JSON = `"` + time.RFC1123 + `"`
+	rfc1123     = time.RFC1123
+)
+
+// TimeRFC1123 defines a type similar to time.Time but assumes a layout of RFC1123 date-time (i.e.,
+// Mon, 02 Jan 2006 15:04:05 MST).
+type TimeRFC1123 struct {
+	time.Time
+}
+
+// UnmarshalJSON reconstitutes the Time from a JSON string conforming to RFC1123 date-time
+// (i.e., Mon, 02 Jan 2006 15:04:05 MST).
+func (t *TimeRFC1123) UnmarshalJSON(data []byte) (err error) {
+	t.Time, err = ParseTime(rfc1123JSON, string(data))
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// MarshalJSON preserves the Time as a JSON string conforming to RFC1123 date-time (i.e.,
+// Mon, 02 Jan 2006 15:04:05 MST).
+func (t TimeRFC1123) MarshalJSON() ([]byte, error) {
+	if y := t.Year(); y < 0 || y >= 10000 {
+		return nil, errors.New("Time.MarshalJSON: year outside of range [0,9999]")
+	}
+	b := []byte(t.Format(rfc1123JSON))
+	return b, nil
+}
+
+// MarshalText preserves the Time as a byte array conforming to RFC1123 date-time (i.e.,
+// Mon, 02 Jan 2006 15:04:05 MST).
+func (t TimeRFC1123) MarshalText() ([]byte, error) {
+	if y := t.Year(); y < 0 || y >= 10000 {
+		return nil, errors.New("Time.MarshalText: year outside of range [0,9999]")
+	}
+
+	b := []byte(t.Format(rfc1123))
+	return b, nil
+}
+
+// UnmarshalText reconstitutes a Time saved as a byte array conforming to RFC1123 date-time
+// (i.e., Mon, 02 Jan 2006 15:04:05 MST).
+func (t *TimeRFC1123) UnmarshalText(data []byte) (err error) {
+	t.Time, err = ParseTime(rfc1123, string(data))
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// MarshalBinary preserves the Time as a byte array conforming to RFC1123 date-time (i.e.,
+// Mon, 02 Jan 2006 15:04:05 MST).
+func (t TimeRFC1123) MarshalBinary() ([]byte, error) {
+	return t.MarshalText()
+}
+
+// UnmarshalBinary reconstitutes a Time saved as a byte array conforming to RFC1123 date-time
+// (i.e., Mon, 02 Jan 2006 15:04:05 MST).
+func (t *TimeRFC1123) UnmarshalBinary(data []byte) error {
+	return t.UnmarshalText(data)
+}
+
+// ToTime returns a Time as a time.Time
+func (t TimeRFC1123) ToTime() time.Time {
+	return t.Time
+}
+
+// String returns the Time formatted as an RFC1123 date-time string (i.e.,
+// Mon, 02 Jan 2006 15:04:05 MST).
+func (t TimeRFC1123) String() string {
+	// Note: time.Time.String does not return an RFC1123 compliant string, time.Time.MarshalText does.
+	b, err := t.MarshalText()
+	if err != nil {
+		return ""
+	}
+	return string(b)
+}

vendor/github.com/Azure/go-autorest/autorest/date/utility.go

@@ -0,0 +1,11 @@
+package date
+
+import (
+	"strings"
+	"time"
+)
+
+// ParseTime to parse Time string to specified format.
+func ParseTime(format string, t string) (d time.Time, err error) {
+	return time.Parse(format, strings.ToUpper(t))
+}

vendor/github.com/Azure/go-autorest/autorest/error.go

@@ -0,0 +1,80 @@
+package autorest
+
+import (
+	"fmt"
+	"net/http"
+)
+
+const (
+	// UndefinedStatusCode is used when HTTP status code is not available for an error.
+	UndefinedStatusCode = 0
+)
+
+// DetailedError encloses a error with details of the package, method, and associated HTTP
+// status code (if any).
+type DetailedError struct {
+	Original error
+
+	// PackageType is the package type of the object emitting the error. For types, the value
+	// matches that produced the the '%T' format specifier of the fmt package. For other elements,
+	// such as functions, it is just the package name (e.g., "autorest").
+	PackageType string
+
+	// Method is the name of the method raising the error.
+	Method string
+
+	// StatusCode is the HTTP Response StatusCode (if non-zero) that led to the error.
+	StatusCode interface{}
+
+	// Message is the error message.
+	Message string
+
+	// Service Error is the response body of failed API in bytes
+	ServiceError []byte
+}
+
+// NewError creates a new Error conforming object from the passed packageType, method, and
+// message. message is treated as a format string to which the optional args apply.
+func NewError(packageType string, method string, message string, args ...interface{}) DetailedError {
+	return NewErrorWithError(nil, packageType, method, nil, message, args...)
+}
+
+// NewErrorWithResponse creates a new Error conforming object from the passed
+// packageType, method, statusCode of the given resp (UndefinedStatusCode if
+// resp is nil), and message. message is treated as a format string to which the
+// optional args apply.
+func NewErrorWithResponse(packageType string, method string, resp *http.Response, message string, args ...interface{}) DetailedError {
+	return NewErrorWithError(nil, packageType, method, resp, message, args...)
+}
+
+// NewErrorWithError creates a new Error conforming object from the
+// passed packageType, method, statusCode of the given resp (UndefinedStatusCode
+// if resp is nil), message, and original error. message is treated as a format
+// string to which the optional args apply.
+func NewErrorWithError(original error, packageType string, method string, resp *http.Response, message string, args ...interface{}) DetailedError {
+	if v, ok := original.(DetailedError); ok {
+		return v
+	}
+
+	statusCode := UndefinedStatusCode
+	if resp != nil {
+		statusCode = resp.StatusCode
+	}
+
+	return DetailedError{
+		Original:    original,
+		PackageType: packageType,
+		Method:      method,
+		StatusCode:  statusCode,
+		Message:     fmt.Sprintf(message, args...),
+	}
+}
+
+// Error returns a formatted containing all available details (i.e., PackageType, Method,
+// StatusCode, Message, and original error (if any)).
+func (e DetailedError) Error() string {
+	if e.Original == nil {
+		return fmt.Sprintf("%s#%s: %s: StatusCode=%d", e.PackageType, e.Method, e.Message, e.StatusCode)
+	}
+	return fmt.Sprintf("%s#%s: %s: StatusCode=%d -- Original Error: %v", e.PackageType, e.Method, e.Message, e.StatusCode, e.Original)
+}

vendor/github.com/Azure/go-autorest/autorest/preparer.go

@@ -0,0 +1,433 @@
+package autorest
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"mime/multipart"
+	"net/http"
+	"net/url"
+	"strings"
+)
+
+const (
+	mimeTypeJSON     = "application/json"
+	mimeTypeFormPost = "application/x-www-form-urlencoded"
+
+	headerAuthorization = "Authorization"
+	headerContentType   = "Content-Type"
+	headerUserAgent     = "User-Agent"
+)
+
+// Preparer is the interface that wraps the Prepare method.
+//
+// Prepare accepts and possibly modifies an http.Request (e.g., adding Headers). Implementations
+// must ensure to not share or hold per-invocation state since Preparers may be shared and re-used.
+type Preparer interface {
+	Prepare(*http.Request) (*http.Request, error)
+}
+
+// PreparerFunc is a method that implements the Preparer interface.
+type PreparerFunc func(*http.Request) (*http.Request, error)
+
+// Prepare implements the Preparer interface on PreparerFunc.
+func (pf PreparerFunc) Prepare(r *http.Request) (*http.Request, error) {
+	return pf(r)
+}
+
+// PrepareDecorator takes and possibly decorates, by wrapping, a Preparer. Decorators may affect the
+// http.Request and pass it along or, first, pass the http.Request along then affect the result.
+type PrepareDecorator func(Preparer) Preparer
+
+// CreatePreparer creates, decorates, and returns a Preparer.
+// Without decorators, the returned Preparer returns the passed http.Request unmodified.
+// Preparers are safe to share and re-use.
+func CreatePreparer(decorators ...PrepareDecorator) Preparer {
+	return DecoratePreparer(
+		Preparer(PreparerFunc(func(r *http.Request) (*http.Request, error) { return r, nil })),
+		decorators...)
+}
+
+// DecoratePreparer accepts a Preparer and a, possibly empty, set of PrepareDecorators, which it
+// applies to the Preparer. Decorators are applied in the order received, but their affect upon the
+// request depends on whether they are a pre-decorator (change the http.Request and then pass it
+// along) or a post-decorator (pass the http.Request along and alter it on return).
+func DecoratePreparer(p Preparer, decorators ...PrepareDecorator) Preparer {
+	for _, decorate := range decorators {
+		p = decorate(p)
+	}
+	return p
+}
+
+// Prepare accepts an http.Request and a, possibly empty, set of PrepareDecorators.
+// It creates a Preparer from the decorators which it then applies to the passed http.Request.
+func Prepare(r *http.Request, decorators ...PrepareDecorator) (*http.Request, error) {
+	if r == nil {
+		return nil, NewError("autorest", "Prepare", "Invoked without an http.Request")
+	}
+	return CreatePreparer(decorators...).Prepare(r)
+}
+
+// WithNothing returns a "do nothing" PrepareDecorator that makes no changes to the passed
+// http.Request.
+func WithNothing() PrepareDecorator {
+	return func(p Preparer) Preparer {
+		return PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			return p.Prepare(r)
+		})
+	}
+}
+
+// WithHeader returns a PrepareDecorator that sets the specified HTTP header of the http.Request to
+// the passed value. It canonicalizes the passed header name (via http.CanonicalHeaderKey) before
+// adding the header.
+func WithHeader(header string, value string) PrepareDecorator {
+	return func(p Preparer) Preparer {
+		return PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			r, err := p.Prepare(r)
+			if err == nil {
+				if r.Header == nil {
+					r.Header = make(http.Header)
+				}
+				r.Header.Set(http.CanonicalHeaderKey(header), value)
+			}
+			return r, err
+		})
+	}
+}
+
+// WithBearerAuthorization returns a PrepareDecorator that adds an HTTP Authorization header whose
+// value is "Bearer " followed by the supplied token.
+func WithBearerAuthorization(token string) PrepareDecorator {
+	return WithHeader(headerAuthorization, fmt.Sprintf("Bearer %s", token))
+}
+
+// AsContentType returns a PrepareDecorator that adds an HTTP Content-Type header whose value
+// is the passed contentType.
+func AsContentType(contentType string) PrepareDecorator {
+	return WithHeader(headerContentType, contentType)
+}
+
+// WithUserAgent returns a PrepareDecorator that adds an HTTP User-Agent header whose value is the
+// passed string.
+func WithUserAgent(ua string) PrepareDecorator {
+	return WithHeader(headerUserAgent, ua)
+}
+
+// AsFormURLEncoded returns a PrepareDecorator that adds an HTTP Content-Type header whose value is
+// "application/x-www-form-urlencoded".
+func AsFormURLEncoded() PrepareDecorator {
+	return AsContentType(mimeTypeFormPost)
+}
+
+// AsJSON returns a PrepareDecorator that adds an HTTP Content-Type header whose value is
+// "application/json".
+func AsJSON() PrepareDecorator {
+	return AsContentType(mimeTypeJSON)
+}
+
+// WithMethod returns a PrepareDecorator that sets the HTTP method of the passed request. The
+// decorator does not validate that the passed method string is a known HTTP method.
+func WithMethod(method string) PrepareDecorator {
+	return func(p Preparer) Preparer {
+		return PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			r.Method = method
+			return p.Prepare(r)
+		})
+	}
+}
+
+// AsDelete returns a PrepareDecorator that sets the HTTP method to DELETE.
+func AsDelete() PrepareDecorator { return WithMethod("DELETE") }
+
+// AsGet returns a PrepareDecorator that sets the HTTP method to GET.
+func AsGet() PrepareDecorator { return WithMethod("GET") }
+
+// AsHead returns a PrepareDecorator that sets the HTTP method to HEAD.
+func AsHead() PrepareDecorator { return WithMethod("HEAD") }
+
+// AsOptions returns a PrepareDecorator that sets the HTTP method to OPTIONS.
+func AsOptions() PrepareDecorator { return WithMethod("OPTIONS") }
+
+// AsPatch returns a PrepareDecorator that sets the HTTP method to PATCH.
+func AsPatch() PrepareDecorator { return WithMethod("PATCH") }
+
+// AsPost returns a PrepareDecorator that sets the HTTP method to POST.
+func AsPost() PrepareDecorator { return WithMethod("POST") }
+
+// AsPut returns a PrepareDecorator that sets the HTTP method to PUT.
+func AsPut() PrepareDecorator { return WithMethod("PUT") }
+
+// WithBaseURL returns a PrepareDecorator that populates the http.Request with a url.URL constructed
+// from the supplied baseUrl.
+func WithBaseURL(baseURL string) PrepareDecorator {
+	return func(p Preparer) Preparer {
+		return PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			r, err := p.Prepare(r)
+			if err == nil {
+				var u *url.URL
+				if u, err = url.Parse(baseURL); err != nil {
+					return r, err
+				}
+				if u.Scheme == "" {
+					err = fmt.Errorf("autorest: No scheme detected in URL %s", baseURL)
+				}
+				if err == nil {
+					r.URL = u
+				}
+			}
+			return r, err
+		})
+	}
+}
+
+// WithFormData returns a PrepareDecoratore that "URL encodes" (e.g., bar=baz&foo=quux) into the
+// http.Request body.
+func WithFormData(v url.Values) PrepareDecorator {
+	return func(p Preparer) Preparer {
+		return PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			r, err := p.Prepare(r)
+			if err == nil {
+				s := v.Encode()
+				r.ContentLength = int64(len(s))
+				r.Body = ioutil.NopCloser(strings.NewReader(s))
+			}
+			return r, err
+		})
+	}
+}
+
+// WithMultiPartFormData returns a PrepareDecoratore that "URL encodes" (e.g., bar=baz&foo=quux) form parameters
+// into the http.Request body.
+func WithMultiPartFormData(formDataParameters map[string]interface{}) PrepareDecorator {
+	return func(p Preparer) Preparer {
+		return PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			r, err := p.Prepare(r)
+			if err == nil {
+				var body bytes.Buffer
+				writer := multipart.NewWriter(&body)
+				for key, value := range formDataParameters {
+					if rc, ok := value.(io.ReadCloser); ok {
+						var fd io.Writer
+						if fd, err = writer.CreateFormFile(key, key); err != nil {
+							return r, err
+						}
+						if _, err = io.Copy(fd, rc); err != nil {
+							return r, err
+						}
+					} else {
+						if err = writer.WriteField(key, ensureValueString(value)); err != nil {
+							return r, err
+						}
+					}
+				}
+				if err = writer.Close(); err != nil {
+					return r, err
+				}
+				if r.Header == nil {
+					r.Header = make(http.Header)
+				}
+				r.Header.Set(http.CanonicalHeaderKey(headerContentType), writer.FormDataContentType())
+				r.Body = ioutil.NopCloser(bytes.NewReader(body.Bytes()))
+				r.ContentLength = int64(body.Len())
+				return r, err
+			}
+			return r, err
+		})
+	}
+}
+
+// WithFile returns a PrepareDecorator that sends file in request body.
+func WithFile(f io.ReadCloser) PrepareDecorator {
+	return func(p Preparer) Preparer {
+		return PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			r, err := p.Prepare(r)
+			if err == nil {
+				b, err := ioutil.ReadAll(f)
+				if err != nil {
+					return r, err
+				}
+				r.Body = ioutil.NopCloser(bytes.NewReader(b))
+				r.ContentLength = int64(len(b))
+			}
+			return r, err
+		})
+	}
+}
+
+// WithBool returns a PrepareDecorator that encodes the passed bool into the body of the request
+// and sets the Content-Length header.
+func WithBool(v bool) PrepareDecorator {
+	return WithString(fmt.Sprintf("%v", v))
+}
+
+// WithFloat32 returns a PrepareDecorator that encodes the passed float32 into the body of the
+// request and sets the Content-Length header.
+func WithFloat32(v float32) PrepareDecorator {
+	return WithString(fmt.Sprintf("%v", v))
+}
+
+// WithFloat64 returns a PrepareDecorator that encodes the passed float64 into the body of the
+// request and sets the Content-Length header.
+func WithFloat64(v float64) PrepareDecorator {
+	return WithString(fmt.Sprintf("%v", v))
+}
+
+// WithInt32 returns a PrepareDecorator that encodes the passed int32 into the body of the request
+// and sets the Content-Length header.
+func WithInt32(v int32) PrepareDecorator {
+	return WithString(fmt.Sprintf("%v", v))
+}
+
+// WithInt64 returns a PrepareDecorator that encodes the passed int64 into the body of the request
+// and sets the Content-Length header.
+func WithInt64(v int64) PrepareDecorator {
+	return WithString(fmt.Sprintf("%v", v))
+}
+
+// WithString returns a PrepareDecorator that encodes the passed string into the body of the request
+// and sets the Content-Length header.
+func WithString(v string) PrepareDecorator {
+	return func(p Preparer) Preparer {
+		return PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			r, err := p.Prepare(r)
+			if err == nil {
+				r.ContentLength = int64(len(v))
+				r.Body = ioutil.NopCloser(strings.NewReader(v))
+			}
+			return r, err
+		})
+	}
+}
+
+// WithJSON returns a PrepareDecorator that encodes the data passed as JSON into the body of the
+// request and sets the Content-Length header.
+func WithJSON(v interface{}) PrepareDecorator {
+	return func(p Preparer) Preparer {
+		return PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			r, err := p.Prepare(r)
+			if err == nil {
+				b, err := json.Marshal(v)
+				if err == nil {
+					r.ContentLength = int64(len(b))
+					r.Body = ioutil.NopCloser(bytes.NewReader(b))
+				}
+			}
+			return r, err
+		})
+	}
+}
+
+// WithPath returns a PrepareDecorator that adds the supplied path to the request URL. If the path
+// is absolute (that is, it begins with a "/"), it replaces the existing path.
+func WithPath(path string) PrepareDecorator {
+	return func(p Preparer) Preparer {
+		return PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			r, err := p.Prepare(r)
+			if err == nil {
+				if r.URL == nil {
+					return r, NewError("autorest", "WithPath", "Invoked with a nil URL")
+				}
+				if r.URL, err = parseURL(r.URL, path); err != nil {
+					return r, err
+				}
+			}
+			return r, err
+		})
+	}
+}
+
+// WithEscapedPathParameters returns a PrepareDecorator that replaces brace-enclosed keys within the
+// request path (i.e., http.Request.URL.Path) with the corresponding values from the passed map. The
+// values will be escaped (aka URL encoded) before insertion into the path.
+func WithEscapedPathParameters(path string, pathParameters map[string]interface{}) PrepareDecorator {
+	parameters := escapeValueStrings(ensureValueStrings(pathParameters))
+	return func(p Preparer) Preparer {
+		return PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			r, err := p.Prepare(r)
+			if err == nil {
+				if r.URL == nil {
+					return r, NewError("autorest", "WithEscapedPathParameters", "Invoked with a nil URL")
+				}
+				for key, value := range parameters {
+					path = strings.Replace(path, "{"+key+"}", value, -1)
+				}
+				if r.URL, err = parseURL(r.URL, path); err != nil {
+					return r, err
+				}
+			}
+			return r, err
+		})
+	}
+}
+
+// WithPathParameters returns a PrepareDecorator that replaces brace-enclosed keys within the
+// request path (i.e., http.Request.URL.Path) with the corresponding values from the passed map.
+func WithPathParameters(path string, pathParameters map[string]interface{}) PrepareDecorator {
+	parameters := ensureValueStrings(pathParameters)
+	return func(p Preparer) Preparer {
+		return PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			r, err := p.Prepare(r)
+			if err == nil {
+				if r.URL == nil {
+					return r, NewError("autorest", "WithPathParameters", "Invoked with a nil URL")
+				}
+				for key, value := range parameters {
+					path = strings.Replace(path, "{"+key+"}", value, -1)
+				}
+
+				if r.URL, err = parseURL(r.URL, path); err != nil {
+					return r, err
+				}
+			}
+			return r, err
+		})
+	}
+}
+
+func parseURL(u *url.URL, path string) (*url.URL, error) {
+	p := strings.TrimRight(u.String(), "/")
+	if !strings.HasPrefix(path, "/") {
+		path = "/" + path
+	}
+	return url.Parse(p + path)
+}
+
+// WithQueryParameters returns a PrepareDecorators that encodes and applies the query parameters
+// given in the supplied map (i.e., key=value).
+func WithQueryParameters(queryParameters map[string]interface{}) PrepareDecorator {
+	parameters := ensureValueStrings(queryParameters)
+	return func(p Preparer) Preparer {
+		return PreparerFunc(func(r *http.Request) (*http.Request, error) {
+			r, err := p.Prepare(r)
+			if err == nil {
+				if r.URL == nil {
+					return r, NewError("autorest", "WithQueryParameters", "Invoked with a nil URL")
+				}
+				v := r.URL.Query()
+				for key, value := range parameters {
+					v.Add(key, value)
+				}
+				r.URL.RawQuery = createQuery(v)
+			}
+			return r, err
+		})
+	}
+}
+
+// Authorizer is the interface that provides a PrepareDecorator used to supply request
+// authorization. Most often, the Authorizer decorator runs last so it has access to the full
+// state of the formed HTTP request.
+type Authorizer interface {
+	WithAuthorization() PrepareDecorator
+}
+
+// NullAuthorizer implements a default, "do nothing" Authorizer.
+type NullAuthorizer struct{}
+
+// WithAuthorization returns a PrepareDecorator that does nothing.
+func (na NullAuthorizer) WithAuthorization() PrepareDecorator {
+	return WithNothing()
+}

vendor/github.com/Azure/go-autorest/autorest/responder.go

@@ -0,0 +1,215 @@
+package autorest
+
+import (
+	"bytes"
+	"encoding/json"
+	"encoding/xml"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"strings"
+)
+
+// Responder is the interface that wraps the Respond method.
+//
+// Respond accepts and reacts to an http.Response. Implementations must ensure to not share or hold
+// state since Responders may be shared and re-used.
+type Responder interface {
+	Respond(*http.Response) error
+}
+
+// ResponderFunc is a method that implements the Responder interface.
+type ResponderFunc func(*http.Response) error
+
+// Respond implements the Responder interface on ResponderFunc.
+func (rf ResponderFunc) Respond(r *http.Response) error {
+	return rf(r)
+}
+
+// RespondDecorator takes and possibly decorates, by wrapping, a Responder. Decorators may react to
+// the http.Response and pass it along or, first, pass the http.Response along then react.
+type RespondDecorator func(Responder) Responder
+
+// CreateResponder creates, decorates, and returns a Responder. Without decorators, the returned
+// Responder returns the passed http.Response unmodified. Responders may or may not be safe to share
+// and re-used: It depends on the applied decorators. For example, a standard decorator that closes
+// the response body is fine to share whereas a decorator that reads the body into a passed struct
+// is not.
+//
+// To prevent memory leaks, ensure that at least one Responder closes the response body.
+func CreateResponder(decorators ...RespondDecorator) Responder {
+	return DecorateResponder(
+		Responder(ResponderFunc(func(r *http.Response) error { return nil })),
+		decorators...)
+}
+
+// DecorateResponder accepts a Responder and a, possibly empty, set of RespondDecorators, which it
+// applies to the Responder. Decorators are applied in the order received, but their affect upon the
+// request depends on whether they are a pre-decorator (react to the http.Response and then pass it
+// along) or a post-decorator (pass the http.Response along and then react).
+func DecorateResponder(r Responder, decorators ...RespondDecorator) Responder {
+	for _, decorate := range decorators {
+		r = decorate(r)
+	}
+	return r
+}
+
+// Respond accepts an http.Response and a, possibly empty, set of RespondDecorators.
+// It creates a Responder from the decorators it then applies to the passed http.Response.
+func Respond(r *http.Response, decorators ...RespondDecorator) error {
+	if r == nil {
+		return nil
+	}
+	return CreateResponder(decorators...).Respond(r)
+}
+
+// ByIgnoring returns a RespondDecorator that ignores the passed http.Response passing it unexamined
+// to the next RespondDecorator.
+func ByIgnoring() RespondDecorator {
+	return func(r Responder) Responder {
+		return ResponderFunc(func(resp *http.Response) error {
+			return r.Respond(resp)
+		})
+	}
+}
+
+// ByCopying copies the contents of the http.Response Body into the passed bytes.Buffer as
+// the Body is read.
+func ByCopying(b *bytes.Buffer) RespondDecorator {
+	return func(r Responder) Responder {
+		return ResponderFunc(func(resp *http.Response) error {
+			err := r.Respond(resp)
+			if err == nil && resp != nil && resp.Body != nil {
+				resp.Body = TeeReadCloser(resp.Body, b)
+			}
+			return err
+		})
+	}
+}
+
+// ByClosing returns a RespondDecorator that first invokes the passed Responder after which it
+// closes the response body. Since the passed Responder is invoked prior to closing the response
+// body, the decorator may occur anywhere within the set.
+func ByClosing() RespondDecorator {
+	return func(r Responder) Responder {
+		return ResponderFunc(func(resp *http.Response) error {
+			err := r.Respond(resp)
+			if resp != nil && resp.Body != nil {
+				if err := resp.Body.Close(); err != nil {
+					return fmt.Errorf("Error closing the response body: %v", err)
+				}
+			}
+			return err
+		})
+	}
+}
+
+// ByClosingIfError returns a RespondDecorator that first invokes the passed Responder after which
+// it closes the response if the passed Responder returns an error and the response body exists.
+func ByClosingIfError() RespondDecorator {
+	return func(r Responder) Responder {
+		return ResponderFunc(func(resp *http.Response) error {
+			err := r.Respond(resp)
+			if err != nil && resp != nil && resp.Body != nil {
+				if err := resp.Body.Close(); err != nil {
+					return fmt.Errorf("Error closing the response body: %v", err)
+				}
+			}
+			return err
+		})
+	}
+}
+
+// ByUnmarshallingJSON returns a RespondDecorator that decodes a JSON document returned in the
+// response Body into the value pointed to by v.
+func ByUnmarshallingJSON(v interface{}) RespondDecorator {
+	return func(r Responder) Responder {
+		return ResponderFunc(func(resp *http.Response) error {
+			err := r.Respond(resp)
+			if err == nil {
+				b, errInner := ioutil.ReadAll(resp.Body)
+				if errInner != nil {
+					err = fmt.Errorf("Error occurred reading http.Response#Body - Error = '%v'", errInner)
+				} else if len(strings.Trim(string(b), " ")) > 0 {
+					errInner = json.Unmarshal(b, v)
+					if errInner != nil {
+						err = fmt.Errorf("Error occurred unmarshalling JSON - Error = '%v' JSON = '%s'", errInner, string(b))
+					}
+				}
+			}
+			return err
+		})
+	}
+}
+
+// ByUnmarshallingXML returns a RespondDecorator that decodes a XML document returned in the
+// response Body into the value pointed to by v.
+func ByUnmarshallingXML(v interface{}) RespondDecorator {
+	return func(r Responder) Responder {
+		return ResponderFunc(func(resp *http.Response) error {
+			err := r.Respond(resp)
+			if err == nil {
+				b, errInner := ioutil.ReadAll(resp.Body)
+				if errInner != nil {
+					err = fmt.Errorf("Error occurred reading http.Response#Body - Error = '%v'", errInner)
+				} else {
+					errInner = xml.Unmarshal(b, v)
+					if errInner != nil {
+						err = fmt.Errorf("Error occurred unmarshalling Xml - Error = '%v' Xml = '%s'", errInner, string(b))
+					}
+				}
+			}
+			return err
+		})
+	}
+}
+
+// WithErrorUnlessStatusCode returns a RespondDecorator that emits an error unless the response
+// StatusCode is among the set passed. On error, response body is fully read into a buffer and
+// presented in the returned error, as well as in the response body.
+func WithErrorUnlessStatusCode(codes ...int) RespondDecorator {
+	return func(r Responder) Responder {
+		return ResponderFunc(func(resp *http.Response) error {
+			err := r.Respond(resp)
+			if err == nil && !ResponseHasStatusCode(resp, codes...) {
+				derr := NewErrorWithResponse("autorest", "WithErrorUnlessStatusCode", resp, "%v %v failed with %s",
+					resp.Request.Method,
+					resp.Request.URL,
+					resp.Status)
+				if resp.Body != nil {
+					defer resp.Body.Close()
+					b, _ := ioutil.ReadAll(resp.Body)
+					derr.ServiceError = b
+					resp.Body = ioutil.NopCloser(bytes.NewReader(b))
+				}
+				err = derr
+			}
+			return err
+		})
+	}
+}
+
+// WithErrorUnlessOK returns a RespondDecorator that emits an error if the response StatusCode is
+// anything other than HTTP 200.
+func WithErrorUnlessOK() RespondDecorator {
+	return WithErrorUnlessStatusCode(http.StatusOK)
+}
+
+// ExtractHeader extracts all values of the specified header from the http.Response. It returns an
+// empty string slice if the passed http.Response is nil or the header does not exist.
+func ExtractHeader(header string, resp *http.Response) []string {
+	if resp != nil && resp.Header != nil {
+		return resp.Header[http.CanonicalHeaderKey(header)]
+	}
+	return nil
+}
+
+// ExtractHeaderValue extracts the first value of the specified header from the http.Response. It
+// returns an empty string if the passed http.Response is nil or the header does not exist.
+func ExtractHeaderValue(header string, resp *http.Response) string {
+	h := ExtractHeader(header, resp)
+	if len(h) > 0 {
+		return h[0]
+	}
+	return ""
+}

vendor/github.com/Azure/go-autorest/autorest/sender.go

@@ -0,0 +1,267 @@
+package autorest
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"math"
+	"net/http"
+	"time"
+)
+
+// Sender is the interface that wraps the Do method to send HTTP requests.
+//
+// The standard http.Client conforms to this interface.
+type Sender interface {
+	Do(*http.Request) (*http.Response, error)
+}
+
+// SenderFunc is a method that implements the Sender interface.
+type SenderFunc func(*http.Request) (*http.Response, error)
+
+// Do implements the Sender interface on SenderFunc.
+func (sf SenderFunc) Do(r *http.Request) (*http.Response, error) {
+	return sf(r)
+}
+
+// SendDecorator takes and possibily decorates, by wrapping, a Sender. Decorators may affect the
+// http.Request and pass it along or, first, pass the http.Request along then react to the
+// http.Response result.
+type SendDecorator func(Sender) Sender
+
+// CreateSender creates, decorates, and returns, as a Sender, the default http.Client.
+func CreateSender(decorators ...SendDecorator) Sender {
+	return DecorateSender(&http.Client{}, decorators...)
+}
+
+// DecorateSender accepts a Sender and a, possibly empty, set of SendDecorators, which is applies to
+// the Sender. Decorators are applied in the order received, but their affect upon the request
+// depends on whether they are a pre-decorator (change the http.Request and then pass it along) or a
+// post-decorator (pass the http.Request along and react to the results in http.Response).
+func DecorateSender(s Sender, decorators ...SendDecorator) Sender {
+	for _, decorate := range decorators {
+		s = decorate(s)
+	}
+	return s
+}
+
+// Send sends, by means of the default http.Client, the passed http.Request, returning the
+// http.Response and possible error. It also accepts a, possibly empty, set of SendDecorators which
+// it will apply the http.Client before invoking the Do method.
+//
+// Send is a convenience method and not recommended for production. Advanced users should use
+// SendWithSender, passing and sharing their own Sender (e.g., instance of http.Client).
+//
+// Send will not poll or retry requests.
+func Send(r *http.Request, decorators ...SendDecorator) (*http.Response, error) {
+	return SendWithSender(&http.Client{}, r, decorators...)
+}
+
+// SendWithSender sends the passed http.Request, through the provided Sender, returning the
+// http.Response and possible error. It also accepts a, possibly empty, set of SendDecorators which
+// it will apply the http.Client before invoking the Do method.
+//
+// SendWithSender will not poll or retry requests.
+func SendWithSender(s Sender, r *http.Request, decorators ...SendDecorator) (*http.Response, error) {
+	return DecorateSender(s, decorators...).Do(r)
+}
+
+// AfterDelay returns a SendDecorator that delays for the passed time.Duration before
+// invoking the Sender. The delay may be terminated by closing the optional channel on the
+// http.Request. If canceled, no further Senders are invoked.
+func AfterDelay(d time.Duration) SendDecorator {
+	return func(s Sender) Sender {
+		return SenderFunc(func(r *http.Request) (*http.Response, error) {
+			if !DelayForBackoff(d, 1, r.Cancel) {
+				return nil, fmt.Errorf("autorest: AfterDelay canceled before full delay")
+			}
+			return s.Do(r)
+		})
+	}
+}
+
+// AsIs returns a SendDecorator that invokes the passed Sender without modifying the http.Request.
+func AsIs() SendDecorator {
+	return func(s Sender) Sender {
+		return SenderFunc(func(r *http.Request) (*http.Response, error) {
+			return s.Do(r)
+		})
+	}
+}
+
+// DoCloseIfError returns a SendDecorator that first invokes the passed Sender after which
+// it closes the response if the passed Sender returns an error and the response body exists.
+func DoCloseIfError() SendDecorator {
+	return func(s Sender) Sender {
+		return SenderFunc(func(r *http.Request) (*http.Response, error) {
+			resp, err := s.Do(r)
+			if err != nil {
+				Respond(resp, ByClosing())
+			}
+			return resp, err
+		})
+	}
+}
+
+// DoErrorIfStatusCode returns a SendDecorator that emits an error if the response StatusCode is
+// among the set passed. Since these are artificial errors, the response body may still require
+// closing.
+func DoErrorIfStatusCode(codes ...int) SendDecorator {
+	return func(s Sender) Sender {
+		return SenderFunc(func(r *http.Request) (*http.Response, error) {
+			resp, err := s.Do(r)
+			if err == nil && ResponseHasStatusCode(resp, codes...) {
+				err = NewErrorWithResponse("autorest", "DoErrorIfStatusCode", resp, "%v %v failed with %s",
+					resp.Request.Method,
+					resp.Request.URL,
+					resp.Status)
+			}
+			return resp, err
+		})
+	}
+}
+
+// DoErrorUnlessStatusCode returns a SendDecorator that emits an error unless the response
+// StatusCode is among the set passed. Since these are artificial errors, the response body
+// may still require closing.
+func DoErrorUnlessStatusCode(codes ...int) SendDecorator {
+	return func(s Sender) Sender {
+		return SenderFunc(func(r *http.Request) (*http.Response, error) {
+			resp, err := s.Do(r)
+			if err == nil && !ResponseHasStatusCode(resp, codes...) {
+				err = NewErrorWithResponse("autorest", "DoErrorUnlessStatusCode", resp, "%v %v failed with %s",
+					resp.Request.Method,
+					resp.Request.URL,
+					resp.Status)
+			}
+			return resp, err
+		})
+	}
+}
+
+// DoPollForStatusCodes returns a SendDecorator that polls if the http.Response contains one of the
+// passed status codes. It expects the http.Response to contain a Location header providing the
+// URL at which to poll (using GET) and will poll until the time passed is equal to or greater than
+// the supplied duration. It will delay between requests for the duration specified in the
+// RetryAfter header or, if the header is absent, the passed delay. Polling may be canceled by
+// closing the optional channel on the http.Request.
+func DoPollForStatusCodes(duration time.Duration, delay time.Duration, codes ...int) SendDecorator {
+	return func(s Sender) Sender {
+		return SenderFunc(func(r *http.Request) (resp *http.Response, err error) {
+			resp, err = s.Do(r)
+
+			if err == nil && ResponseHasStatusCode(resp, codes...) {
+				r, err = NewPollingRequest(resp, r.Cancel)
+
+				for err == nil && ResponseHasStatusCode(resp, codes...) {
+					Respond(resp,
+						ByClosing())
+					resp, err = SendWithSender(s, r,
+						AfterDelay(GetRetryAfter(resp, delay)))
+				}
+			}
+
+			return resp, err
+		})
+	}
+}
+
+// DoRetryForAttempts returns a SendDecorator that retries a failed request for up to the specified
+// number of attempts, exponentially backing off between requests using the supplied backoff
+// time.Duration (which may be zero). Retrying may be canceled by closing the optional channel on
+// the http.Request.
+func DoRetryForAttempts(attempts int, backoff time.Duration) SendDecorator {
+	return func(s Sender) Sender {
+		return SenderFunc(func(r *http.Request) (resp *http.Response, err error) {
+			for attempt := 0; attempt < attempts; attempt++ {
+				resp, err = s.Do(r)
+				if err == nil {
+					return resp, err
+				}
+				DelayForBackoff(backoff, attempt, r.Cancel)
+			}
+			return resp, err
+		})
+	}
+}
+
+// DoRetryForStatusCodes returns a SendDecorator that retries for specified statusCodes for up to the specified
+// number of attempts, exponentially backing off between requests using the supplied backoff
+// time.Duration (which may be zero). Retrying may be canceled by closing the optional channel on
+// the http.Request.
+func DoRetryForStatusCodes(attempts int, backoff time.Duration, codes ...int) SendDecorator {
+	return func(s Sender) Sender {
+		return SenderFunc(func(r *http.Request) (resp *http.Response, err error) {
+			b := []byte{}
+			if r.Body != nil {
+				b, err = ioutil.ReadAll(r.Body)
+				if err != nil {
+					return resp, err
+				}
+			}
+
+			// Increment to add the first call (attempts denotes number of retries)
+			attempts++
+			for attempt := 0; attempt < attempts; attempt++ {
+				r.Body = ioutil.NopCloser(bytes.NewBuffer(b))
+				resp, err = s.Do(r)
+				if err != nil || !ResponseHasStatusCode(resp, codes...) {
+					return resp, err
+				}
+				DelayForBackoff(backoff, attempt, r.Cancel)
+			}
+			return resp, err
+		})
+	}
+}
+
+// DoRetryForDuration returns a SendDecorator that retries the request until the total time is equal
+// to or greater than the specified duration, exponentially backing off between requests using the
+// supplied backoff time.Duration (which may be zero). Retrying may be canceled by closing the
+// optional channel on the http.Request.
+func DoRetryForDuration(d time.Duration, backoff time.Duration) SendDecorator {
+	return func(s Sender) Sender {
+		return SenderFunc(func(r *http.Request) (resp *http.Response, err error) {
+			end := time.Now().Add(d)
+			for attempt := 0; time.Now().Before(end); attempt++ {
+				resp, err = s.Do(r)
+				if err == nil {
+					return resp, err
+				}
+				DelayForBackoff(backoff, attempt, r.Cancel)
+			}
+			return resp, err
+		})
+	}
+}
+
+// WithLogging returns a SendDecorator that implements simple before and after logging of the
+// request.
+func WithLogging(logger *log.Logger) SendDecorator {
+	return func(s Sender) Sender {
+		return SenderFunc(func(r *http.Request) (*http.Response, error) {
+			logger.Printf("Sending %s %s", r.Method, r.URL)
+			resp, err := s.Do(r)
+			if err != nil {
+				logger.Printf("%s %s received error '%v'", r.Method, r.URL, err)
+			} else {
+				logger.Printf("%s %s received %s", r.Method, r.URL, resp.Status)
+			}
+			return resp, err
+		})
+	}
+}
+
+// DelayForBackoff invokes time.After for the supplied backoff duration raised to the power of
+// passed attempt (i.e., an exponential backoff delay). Backoff duration is in seconds and can set
+// to zero for no delay. The delay may be canceled by closing the passed channel. If terminated early,
+// returns false.
+func DelayForBackoff(backoff time.Duration, attempt int, cancel <-chan struct{}) bool {
+	select {
+	case <-time.After(time.Duration(backoff.Seconds()*math.Pow(2, float64(attempt))) * time.Second):
+		return true
+	case <-cancel:
+		return false
+	}
+}

vendor/github.com/Azure/go-autorest/autorest/to/convert.go

@@ -0,0 +1,133 @@
+/*
+Package to provides helpers to ease working with pointer values of marshalled structures.
+*/
+package to
+
+// String returns a string value for the passed string pointer. It returns the empty string if the
+// pointer is nil.
+func String(s *string) string {
+	if s != nil {
+		return *s
+	}
+	return ""
+}
+
+// StringPtr returns a pointer to the passed string.
+func StringPtr(s string) *string {
+	return &s
+}
+
+// StringSlice returns a string slice value for the passed string slice pointer. It returns a nil
+// slice if the pointer is nil.
+func StringSlice(s *[]string) []string {
+	if s != nil {
+		return *s
+	}
+	return nil
+}
+
+// StringSlicePtr returns a pointer to the passed string slice.
+func StringSlicePtr(s []string) *[]string {
+	return &s
+}
+
+// StringMap returns a map of strings built from the map of string pointers. The empty string is
+// used for nil pointers.
+func StringMap(msp map[string]*string) map[string]string {
+	ms := make(map[string]string, len(msp))
+	for k, sp := range msp {
+		if sp != nil {
+			ms[k] = *sp
+		} else {
+			ms[k] = ""
+		}
+	}
+	return ms
+}
+
+// StringMapPtr returns a pointer to a map of string pointers built from the passed map of strings.
+func StringMapPtr(ms map[string]string) *map[string]*string {
+	msp := make(map[string]*string, len(ms))
+	for k, s := range ms {
+		msp[k] = StringPtr(s)
+	}
+	return &msp
+}
+
+// Bool returns a bool value for the passed bool pointer. It returns false if the pointer is nil.
+func Bool(b *bool) bool {
+	if b != nil {
+		return *b
+	}
+	return false
+}
+
+// BoolPtr returns a pointer to the passed bool.
+func BoolPtr(b bool) *bool {
+	return &b
+}
+
+// Int returns an int value for the passed int pointer. It returns 0 if the pointer is nil.
+func Int(i *int) int {
+	if i != nil {
+		return *i
+	}
+	return 0
+}
+
+// IntPtr returns a pointer to the passed int.
+func IntPtr(i int) *int {
+	return &i
+}
+
+// Int32 returns an int value for the passed int pointer. It returns 0 if the pointer is nil.
+func Int32(i *int32) int32 {
+	if i != nil {
+		return *i
+	}
+	return 0
+}
+
+// Int32Ptr returns a pointer to the passed int32.
+func Int32Ptr(i int32) *int32 {
+	return &i
+}
+
+// Int64 returns an int value for the passed int pointer. It returns 0 if the pointer is nil.
+func Int64(i *int64) int64 {
+	if i != nil {
+		return *i
+	}
+	return 0
+}
+
+// Int64Ptr returns a pointer to the passed int64.
+func Int64Ptr(i int64) *int64 {
+	return &i
+}
+
+// Float32 returns an int value for the passed int pointer. It returns 0.0 if the pointer is nil.
+func Float32(i *float32) float32 {
+	if i != nil {
+		return *i
+	}
+	return 0.0
+}
+
+// Float32Ptr returns a pointer to the passed float32.
+func Float32Ptr(i float32) *float32 {
+	return &i
+}
+
+// Float64 returns an int value for the passed int pointer. It returns 0.0 if the pointer is nil.
+func Float64(i *float64) float64 {
+	if i != nil {
+		return *i
+	}
+	return 0.0
+}
+
+// Float64Ptr returns a pointer to the passed float64.
+func Float64Ptr(i float64) *float64 {
+	return &i
+}

vendor/github.com/Azure/go-autorest/autorest/utility.go

@@ -0,0 +1,178 @@
+package autorest
+
+import (
+	"bytes"
+	"encoding/json"
+	"encoding/xml"
+	"fmt"
+	"io"
+	"net/url"
+	"reflect"
+	"sort"
+	"strings"
+)
+
+// EncodedAs is a series of constants specifying various data encodings
+type EncodedAs string
+
+const (
+	// EncodedAsJSON states that data is encoded as JSON
+	EncodedAsJSON EncodedAs = "JSON"
+
+	// EncodedAsXML states that data is encoded as Xml
+	EncodedAsXML EncodedAs = "XML"
+)
+
+// Decoder defines the decoding method json.Decoder and xml.Decoder share
+type Decoder interface {
+	Decode(v interface{}) error
+}
+
+// NewDecoder creates a new decoder appropriate to the passed encoding.
+// encodedAs specifies the type of encoding and r supplies the io.Reader containing the
+// encoded data.
+func NewDecoder(encodedAs EncodedAs, r io.Reader) Decoder {
+	if encodedAs == EncodedAsJSON {
+		return json.NewDecoder(r)
+	} else if encodedAs == EncodedAsXML {
+		return xml.NewDecoder(r)
+	}
+	return nil
+}
+
+// CopyAndDecode decodes the data from the passed io.Reader while making a copy. Having a copy
+// is especially useful if there is a chance the data will fail to decode.
+// encodedAs specifies the expected encoding, r provides the io.Reader to the data, and v
+// is the decoding destination.
+func CopyAndDecode(encodedAs EncodedAs, r io.Reader, v interface{}) (bytes.Buffer, error) {
+	b := bytes.Buffer{}
+	return b, NewDecoder(encodedAs, io.TeeReader(r, &b)).Decode(v)
+}
+
+// TeeReadCloser returns a ReadCloser that writes to w what it reads from rc.
+// It utilizes io.TeeReader to copy the data read and has the same behavior when reading.
+// Further, when it is closed, it ensures that rc is closed as well.
+func TeeReadCloser(rc io.ReadCloser, w io.Writer) io.ReadCloser {
+	return &teeReadCloser{rc, io.TeeReader(rc, w)}
+}
+
+type teeReadCloser struct {
+	rc io.ReadCloser
+	r  io.Reader
+}
+
+func (t *teeReadCloser) Read(p []byte) (int, error) {
+	return t.r.Read(p)
+}
+
+func (t *teeReadCloser) Close() error {
+	return t.rc.Close()
+}
+
+func containsInt(ints []int, n int) bool {
+	for _, i := range ints {
+		if i == n {
+			return true
+		}
+	}
+	return false
+}
+
+func escapeValueStrings(m map[string]string) map[string]string {
+	for key, value := range m {
+		m[key] = url.QueryEscape(value)
+	}
+	return m
+}
+
+func ensureValueStrings(mapOfInterface map[string]interface{}) map[string]string {
+	mapOfStrings := make(map[string]string)
+	for key, value := range mapOfInterface {
+		mapOfStrings[key] = ensureValueString(value)
+	}
+	return mapOfStrings
+}
+
+func ensureValueString(value interface{}) string {
+	if value == nil {
+		return ""
+	}
+	switch v := value.(type) {
+	case string:
+		return v
+	case []byte:
+		return string(v)
+	default:
+		return fmt.Sprintf("%v", v)
+	}
+}
+
+// MapToValues method converts map[string]interface{} to url.Values.
+func MapToValues(m map[string]interface{}) url.Values {
+	v := url.Values{}
+	for key, value := range m {
+		x := reflect.ValueOf(value)
+		if x.Kind() == reflect.Array || x.Kind() == reflect.Slice {
+			for i := 0; i < x.Len(); i++ {
+				v.Add(key, ensureValueString(x.Index(i)))
+			}
+		} else {
+			v.Add(key, ensureValueString(value))
+		}
+	}
+	return v
+}
+
+// String method converts interface v to string. If interface is a list, it
+// joins list elements using separator.
+func String(v interface{}, sep ...string) string {
+	if len(sep) > 0 {
+		return ensureValueString(strings.Join(v.([]string), sep[0]))
+	}
+	return ensureValueString(v)
+}
+
+// Encode method encodes url path and query parameters.
+func Encode(location string, v interface{}, sep ...string) string {
+	s := String(v, sep...)
+	switch strings.ToLower(location) {
+	case "path":
+		return pathEscape(s)
+	case "query":
+		return queryEscape(s)
+	default:
+		return s
+	}
+}
+
+func pathEscape(s string) string {
+	return strings.Replace(url.QueryEscape(s), "+", "%20", -1)
+}
+
+func queryEscape(s string) string {
+	return url.QueryEscape(s)
+}
+
+// This method is same as Encode() method of "net/url" go package,
+// except it does not encode the query parameters because they
+// already come encoded. It formats values map in query format (bar=foo&a=b).
+func createQuery(v url.Values) string {
+	var buf bytes.Buffer
+	keys := make([]string, 0, len(v))
+	for k := range v {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+	for _, k := range keys {
+		vs := v[k]
+		prefix := url.QueryEscape(k) + "="
+		for _, v := range vs {
+			if buf.Len() > 0 {
+				buf.WriteByte('&')
+			}
+			buf.WriteString(prefix)
+			buf.WriteString(v)
+		}
+	}
+	return buf.String()
+}

vendor/github.com/Azure/go-autorest/autorest/validation/validation.go

@@ -0,0 +1,373 @@
+/*
+Package validation provides methods for validating parameter value using reflection.
+*/
+package validation
+
+import (
+	"fmt"
+	"reflect"
+	"regexp"
+	"strings"
+)
+
+// Constraint stores constraint name, target field name
+// Rule and chain validations.
+type Constraint struct {
+
+	// Target field name for validation.
+	Target string
+
+	// Constraint name e.g. minLength, MaxLength, Pattern, etc.
+	Name string
+
+	// Rule for constraint e.g. greater than 10, less than 5 etc.
+	Rule interface{}
+
+	// Chain Validations for struct type
+	Chain []Constraint
+}
+
+// Validation stores parameter-wise validation.
+type Validation struct {
+	TargetValue interface{}
+	Constraints []Constraint
+}
+
+// Constraint list
+const (
+	Empty            = "Empty"
+	Null             = "Null"
+	ReadOnly         = "ReadOnly"
+	Pattern          = "Pattern"
+	MaxLength        = "MaxLength"
+	MinLength        = "MinLength"
+	MaxItems         = "MaxItems"
+	MinItems         = "MinItems"
+	MultipleOf       = "MultipleOf"
+	UniqueItems      = "UniqueItems"
+	InclusiveMaximum = "InclusiveMaximum"
+	ExclusiveMaximum = "ExclusiveMaximum"
+	ExclusiveMinimum = "ExclusiveMinimum"
+	InclusiveMinimum = "InclusiveMinimum"
+)
+
+// Validate method validates constraints on parameter
+// passed in validation array.
+func Validate(m []Validation) error {
+	for _, item := range m {
+		v := reflect.ValueOf(item.TargetValue)
+		for _, constraint := range item.Constraints {
+			var err error
+			switch v.Kind() {
+			case reflect.Ptr:
+				err = validatePtr(v, constraint)
+			case reflect.String:
+				err = validateString(v, constraint)
+			case reflect.Struct:
+				err = validateStruct(v, constraint)
+			case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+				err = validateInt(v, constraint)
+			case reflect.Float32, reflect.Float64:
+				err = validateFloat(v, constraint)
+			case reflect.Array, reflect.Slice, reflect.Map:
+				err = validateArrayMap(v, constraint)
+			default:
+				err = createError(v, constraint, fmt.Sprintf("unknown type %v", v.Kind()))
+			}
+
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func validateStruct(x reflect.Value, v Constraint, name ...string) error {
+	//Get field name from target name which is in format a.b.c
+	s := strings.Split(v.Target, ".")
+	f := x.FieldByName(s[len(s)-1])
+	if isZero(f) {
+		return createError(x, v, fmt.Sprintf("field %q doesn't exist", v.Target))
+	}
+
+	if err := Validate([]Validation{
+		{
+			TargetValue: getInterfaceValue(f),
+			Constraints: []Constraint{v},
+		},
+	}); err != nil {
+		return err
+	}
+	return nil
+}
+
+func validatePtr(x reflect.Value, v Constraint) error {
+	if v.Name == ReadOnly {
+		if !x.IsNil() {
+			return createError(x.Elem(), v, "readonly parameter; must send as nil or empty in request")
+		}
+		return nil
+	}
+	if x.IsNil() {
+		return checkNil(x, v)
+	}
+	if v.Chain != nil {
+		return Validate([]Validation{
+			{
+				TargetValue: getInterfaceValue(x.Elem()),
+				Constraints: v.Chain,
+			},
+		})
+	}
+	return nil
+}
+
+func validateInt(x reflect.Value, v Constraint) error {
+	i := x.Int()
+	r, ok := v.Rule.(int)
+	if !ok {
+		return createError(x, v, fmt.Sprintf("rule must be integer value for %v constraint; got: %v", v.Name, v.Rule))
+	}
+	switch v.Name {
+	case MultipleOf:
+		if i%int64(r) != 0 {
+			return createError(x, v, fmt.Sprintf("value must be a multiple of %v", r))
+		}
+	case ExclusiveMinimum:
+		if i <= int64(r) {
+			return createError(x, v, fmt.Sprintf("value must be greater than %v", r))
+		}
+	case ExclusiveMaximum:
+		if i >= int64(r) {
+			return createError(x, v, fmt.Sprintf("value must be less than %v", r))
+		}
+	case InclusiveMinimum:
+		if i < int64(r) {
+			return createError(x, v, fmt.Sprintf("value must be greater than or equal to %v", r))
+		}
+	case InclusiveMaximum:
+		if i > int64(r) {
+			return createError(x, v, fmt.Sprintf("value must be less than or equal to %v", r))
+		}
+	default:
+		return createError(x, v, fmt.Sprintf("constraint %v is not applicable for type integer", v.Name))
+	}
+	return nil
+}
+
+func validateFloat(x reflect.Value, v Constraint) error {
+	f := x.Float()
+	r, ok := v.Rule.(float64)
+	if !ok {
+		return createError(x, v, fmt.Sprintf("rule must be float value for %v constraint; got: %v", v.Name, v.Rule))
+	}
+	switch v.Name {
+	case ExclusiveMinimum:
+		if f <= r {
+			return createError(x, v, fmt.Sprintf("value must be greater than %v", r))
+		}
+	case ExclusiveMaximum:
+		if f >= r {
+			return createError(x, v, fmt.Sprintf("value must be less than %v", r))
+		}
+	case InclusiveMinimum:
+		if f < r {
+			return createError(x, v, fmt.Sprintf("value must be greater than or equal to %v", r))
+		}
+	case InclusiveMaximum:
+		if f > r {
+			return createError(x, v, fmt.Sprintf("value must be less than or equal to %v", r))
+		}
+	default:
+		return createError(x, v, fmt.Sprintf("constraint %s is not applicable for type float", v.Name))
+	}
+	return nil
+}
+
+func validateString(x reflect.Value, v Constraint) error {
+	s := x.String()
+	switch v.Name {
+	case Empty:
+		if len(s) == 0 {
+			return checkEmpty(x, v)
+		}
+	case Pattern:
+		reg, err := regexp.Compile(v.Rule.(string))
+		if err != nil {
+			return createError(x, v, err.Error())
+		}
+		if !reg.MatchString(s) {
+			return createError(x, v, fmt.Sprintf("value doesn't match pattern %v", v.Rule))
+		}
+	case MaxLength:
+		if _, ok := v.Rule.(int); !ok {
+			return createError(x, v, fmt.Sprintf("rule must be integer value for %v constraint; got: %v", v.Name, v.Rule))
+		}
+		if len(s) > v.Rule.(int) {
+			return createError(x, v, fmt.Sprintf("value length must be less than %v", v.Rule))
+		}
+	case MinLength:
+		if _, ok := v.Rule.(int); !ok {
+			return createError(x, v, fmt.Sprintf("rule must be integer value for %v constraint; got: %v", v.Name, v.Rule))
+		}
+		if len(s) < v.Rule.(int) {
+			return createError(x, v, fmt.Sprintf("value length must be greater than %v", v.Rule))
+		}
+	case ReadOnly:
+		if len(s) > 0 {
+			return createError(reflect.ValueOf(s), v, "readonly parameter; must send as nil or empty in request")
+		}
+	default:
+		return createError(x, v, fmt.Sprintf("constraint %s is not applicable to string type", v.Name))
+	}
+
+	if v.Chain != nil {
+		return Validate([]Validation{
+			{
+				TargetValue: getInterfaceValue(x),
+				Constraints: v.Chain,
+			},
+		})
+	}
+	return nil
+}
+
+func validateArrayMap(x reflect.Value, v Constraint) error {
+	switch v.Name {
+	case Null:
+		if x.IsNil() {
+			return checkNil(x, v)
+		}
+	case Empty:
+		if x.IsNil() || x.Len() == 0 {
+			return checkEmpty(x, v)
+		}
+	case MaxItems:
+		if _, ok := v.Rule.(int); !ok {
+			return createError(x, v, fmt.Sprintf("rule must be integer for %v constraint; got: %v", v.Name, v.Rule))
+		}
+		if x.Len() > v.Rule.(int) {
+			return createError(x, v, fmt.Sprintf("maximum item limit is %v; got: %v", v.Rule, x.Len()))
+		}
+	case MinItems:
+		if _, ok := v.Rule.(int); !ok {
+			return createError(x, v, fmt.Sprintf("rule must be integer for %v constraint; got: %v", v.Name, v.Rule))
+		}
+		if x.Len() < v.Rule.(int) {
+			return createError(x, v, fmt.Sprintf("minimum item limit is %v; got: %v", v.Rule, x.Len()))
+		}
+	case UniqueItems:
+		if x.Kind() == reflect.Array || x.Kind() == reflect.Slice {
+			if !checkForUniqueInArray(x) {
+				return createError(x, v, fmt.Sprintf("all items in parameter %q must be unique; got:%v", v.Target, x))
+			}
+		} else if x.Kind() == reflect.Map {
+			if !checkForUniqueInMap(x) {
+				return createError(x, v, fmt.Sprintf("all items in parameter %q must be unique; got:%v", v.Target, x))
+			}
+		} else {
+			return createError(x, v, fmt.Sprintf("type must be array, slice or map for constraint %v; got: %v", v.Name, x.Kind()))
+		}
+	case ReadOnly:
+		if x.Len() != 0 {
+			return createError(x, v, "readonly parameter; must send as nil or empty in request")
+		}
+	default:
+		return createError(x, v, fmt.Sprintf("constraint %v is not applicable to array, slice and map type", v.Name))
+	}
+
+	if v.Chain != nil {
+		return Validate([]Validation{
+			{
+				TargetValue: getInterfaceValue(x),
+				Constraints: v.Chain,
+			},
+		})
+	}
+	return nil
+}
+
+func checkNil(x reflect.Value, v Constraint) error {
+	if _, ok := v.Rule.(bool); !ok {
+		return createError(x, v, fmt.Sprintf("rule must be bool value for %v constraint; got: %v", v.Name, v.Rule))
+	}
+	if v.Rule.(bool) {
+		return createError(x, v, "value can not be null; required parameter")
+	}
+	return nil
+}
+
+func checkEmpty(x reflect.Value, v Constraint) error {
+	if _, ok := v.Rule.(bool); !ok {
+		return createError(x, v, fmt.Sprintf("rule must be bool value for %v constraint; got: %v", v.Name, v.Rule))
+	}
+
+	if v.Rule.(bool) {
+		return createError(x, v, "value can not be null or empty; required parameter")
+	}
+	return nil
+}
+
+func checkForUniqueInArray(x reflect.Value) bool {
+	if x == reflect.Zero(reflect.TypeOf(x)) || x.Len() == 0 {
+		return false
+	}
+	arrOfInterface := make([]interface{}, x.Len())
+
+	for i := 0; i < x.Len(); i++ {
+		arrOfInterface[i] = x.Index(i).Interface()
+	}
+
+	m := make(map[interface{}]bool)
+	for _, val := range arrOfInterface {
+		if m[val] {
+			return false
+		}
+		m[val] = true
+	}
+	return true
+}
+
+func checkForUniqueInMap(x reflect.Value) bool {
+	if x == reflect.Zero(reflect.TypeOf(x)) || x.Len() == 0 {
+		return false
+	}
+	mapOfInterface := make(map[interface{}]interface{}, x.Len())
+
+	keys := x.MapKeys()
+	for _, k := range keys {
+		mapOfInterface[k.Interface()] = x.MapIndex(k).Interface()
+	}
+
+	m := make(map[interface{}]bool)
+	for _, val := range mapOfInterface {
+		if m[val] {
+			return false
+		}
+		m[val] = true
+	}
+	return true
+}
+
+func getInterfaceValue(x reflect.Value) interface{} {
+	if x.Kind() == reflect.Invalid {
+		return nil
+	}
+	return x.Interface()
+}
+
+func isZero(x interface{}) bool {
+	return x == reflect.Zero(reflect.TypeOf(x)).Interface()
+}
+
+func createError(x reflect.Value, v Constraint, err string) error {
+	return fmt.Errorf("autorest/validation: validation failed: parameter=%s constraint=%s value=%#v details: %s",
+		v.Target, v.Name, getInterfaceValue(x), err)
+}
+
+// NewErrorWithValidationError appends package type and method name in
+// validation error.
+func NewErrorWithValidationError(err error, packageType, method string) error {
+	return fmt.Errorf("%s#%s: Invalid input: %v", packageType, method, err)
+}

vendor/github.com/Azure/go-autorest/autorest/version.go

@@ -0,0 +1,18 @@
+package autorest
+
+import (
+	"fmt"
+)
+
+const (
+	major        = "7"
+	minor        = "0"
+	patch        = "0"
+	tag          = ""
+	semVerFormat = "%s.%s.%s%s"
+)
+
+// Version returns the semantic version (see http://semver.org).
+func Version() string {
+	return fmt.Sprintf(semVerFormat, major, minor, patch, tag)
+}