Vendor main dependencies.
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Timo Reimann
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284
vendor/github.com/xenolf/lego/providers/dns/rackspace/rackspace.go
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vendored
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284
vendor/github.com/xenolf/lego/providers/dns/rackspace/rackspace.go
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// Package rackspace implements a DNS provider for solving the DNS-01
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// challenge using rackspace DNS.
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package rackspace
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"os"
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"time"
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"github.com/xenolf/lego/acme"
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)
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// rackspaceAPIURL represents the Identity API endpoint to call
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var rackspaceAPIURL = "https://identity.api.rackspacecloud.com/v2.0/tokens"
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// DNSProvider is an implementation of the acme.ChallengeProvider interface
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// used to store the reusable token and DNS API endpoint
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type DNSProvider struct {
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token string
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cloudDNSEndpoint string
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}
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// NewDNSProvider returns a DNSProvider instance configured for Rackspace.
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// Credentials must be passed in the environment variables: RACKSPACE_USER
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// and RACKSPACE_API_KEY.
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func NewDNSProvider() (*DNSProvider, error) {
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user := os.Getenv("RACKSPACE_USER")
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key := os.Getenv("RACKSPACE_API_KEY")
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return NewDNSProviderCredentials(user, key)
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}
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// NewDNSProviderCredentials uses the supplied credentials to return a
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// DNSProvider instance configured for Rackspace. It authenticates against
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// the API, also grabbing the DNS Endpoint.
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func NewDNSProviderCredentials(user, key string) (*DNSProvider, error) {
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if user == "" || key == "" {
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return nil, fmt.Errorf("Rackspace credentials missing")
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}
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type APIKeyCredentials struct {
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Username string `json:"username"`
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APIKey string `json:"apiKey"`
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}
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type Auth struct {
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APIKeyCredentials `json:"RAX-KSKEY:apiKeyCredentials"`
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}
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type RackspaceAuthData struct {
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Auth `json:"auth"`
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}
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type RackspaceIdentity struct {
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Access struct {
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ServiceCatalog []struct {
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Endpoints []struct {
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PublicURL string `json:"publicURL"`
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TenantID string `json:"tenantId"`
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} `json:"endpoints"`
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Name string `json:"name"`
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} `json:"serviceCatalog"`
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Token struct {
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ID string `json:"id"`
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} `json:"token"`
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} `json:"access"`
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}
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authData := RackspaceAuthData{
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Auth: Auth{
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APIKeyCredentials: APIKeyCredentials{
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Username: user,
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APIKey: key,
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},
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},
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}
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body, err := json.Marshal(authData)
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if err != nil {
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return nil, err
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}
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req, err := http.NewRequest("POST", rackspaceAPIURL, bytes.NewReader(body))
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if err != nil {
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return nil, err
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}
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req.Header.Set("Content-Type", "application/json")
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client := http.Client{Timeout: 30 * time.Second}
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resp, err := client.Do(req)
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if err != nil {
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return nil, fmt.Errorf("Error querying Rackspace Identity API: %v", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("Rackspace Authentication failed. Response code: %d", resp.StatusCode)
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}
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var rackspaceIdentity RackspaceIdentity
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err = json.NewDecoder(resp.Body).Decode(&rackspaceIdentity)
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if err != nil {
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return nil, err
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}
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// Iterate through the Service Catalog to get the DNS Endpoint
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var dnsEndpoint string
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for _, service := range rackspaceIdentity.Access.ServiceCatalog {
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if service.Name == "cloudDNS" {
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dnsEndpoint = service.Endpoints[0].PublicURL
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break
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}
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}
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if dnsEndpoint == "" {
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return nil, fmt.Errorf("Failed to populate DNS endpoint, check Rackspace API for changes.")
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}
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return &DNSProvider{
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token: rackspaceIdentity.Access.Token.ID,
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cloudDNSEndpoint: dnsEndpoint,
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}, nil
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}
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// Present creates a TXT record to fulfil the dns-01 challenge
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func (c *DNSProvider) Present(domain, token, keyAuth string) error {
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fqdn, value, _ := acme.DNS01Record(domain, keyAuth)
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zoneID, err := c.getHostedZoneID(fqdn)
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if err != nil {
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return err
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}
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rec := RackspaceRecords{
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RackspaceRecord: []RackspaceRecord{{
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Name: acme.UnFqdn(fqdn),
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Type: "TXT",
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Data: value,
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TTL: 300,
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}},
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}
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body, err := json.Marshal(rec)
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if err != nil {
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return err
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}
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_, err = c.makeRequest("POST", fmt.Sprintf("/domains/%d/records", zoneID), bytes.NewReader(body))
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if err != nil {
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return err
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}
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return nil
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}
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// CleanUp removes the TXT record matching the specified parameters
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func (c *DNSProvider) CleanUp(domain, token, keyAuth string) error {
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fqdn, _, _ := acme.DNS01Record(domain, keyAuth)
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zoneID, err := c.getHostedZoneID(fqdn)
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if err != nil {
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return err
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}
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record, err := c.findTxtRecord(fqdn, zoneID)
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if err != nil {
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return err
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}
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_, err = c.makeRequest("DELETE", fmt.Sprintf("/domains/%d/records?id=%s", zoneID, record.ID), nil)
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if err != nil {
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return err
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}
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return nil
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}
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// getHostedZoneID performs a lookup to get the DNS zone which needs
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// modifying for a given FQDN
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func (c *DNSProvider) getHostedZoneID(fqdn string) (int, error) {
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// HostedZones represents the response when querying Rackspace DNS zones
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type ZoneSearchResponse struct {
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TotalEntries int `json:"totalEntries"`
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HostedZones []struct {
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ID int `json:"id"`
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Name string `json:"name"`
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} `json:"domains"`
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}
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authZone, err := acme.FindZoneByFqdn(fqdn, acme.RecursiveNameservers)
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if err != nil {
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return 0, err
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}
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result, err := c.makeRequest("GET", fmt.Sprintf("/domains?name=%s", acme.UnFqdn(authZone)), nil)
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if err != nil {
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return 0, err
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}
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var zoneSearchResponse ZoneSearchResponse
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err = json.Unmarshal(result, &zoneSearchResponse)
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if err != nil {
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return 0, err
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}
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// If nothing was returned, or for whatever reason more than 1 was returned (the search uses exact match, so should not occur)
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if zoneSearchResponse.TotalEntries != 1 {
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return 0, fmt.Errorf("Found %d zones for %s in Rackspace for domain %s", zoneSearchResponse.TotalEntries, authZone, fqdn)
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}
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return zoneSearchResponse.HostedZones[0].ID, nil
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}
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// findTxtRecord searches a DNS zone for a TXT record with a specific name
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func (c *DNSProvider) findTxtRecord(fqdn string, zoneID int) (*RackspaceRecord, error) {
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result, err := c.makeRequest("GET", fmt.Sprintf("/domains/%d/records?type=TXT&name=%s", zoneID, acme.UnFqdn(fqdn)), nil)
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if err != nil {
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return nil, err
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}
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var records RackspaceRecords
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err = json.Unmarshal(result, &records)
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if err != nil {
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return nil, err
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}
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recordsLength := len(records.RackspaceRecord)
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switch recordsLength {
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case 1:
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break
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case 0:
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return nil, fmt.Errorf("No TXT record found for %s", fqdn)
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default:
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return nil, fmt.Errorf("More than 1 TXT record found for %s", fqdn)
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}
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return &records.RackspaceRecord[0], nil
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}
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// makeRequest is a wrapper function used for making DNS API requests
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func (c *DNSProvider) makeRequest(method, uri string, body io.Reader) (json.RawMessage, error) {
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url := c.cloudDNSEndpoint + uri
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req, err := http.NewRequest(method, url, body)
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if err != nil {
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return nil, err
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}
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req.Header.Set("X-Auth-Token", c.token)
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req.Header.Set("Content-Type", "application/json")
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client := http.Client{Timeout: 30 * time.Second}
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resp, err := client.Do(req)
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if err != nil {
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return nil, fmt.Errorf("Error querying DNS API: %v", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusAccepted {
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return nil, fmt.Errorf("Request failed for %s %s. Response code: %d", method, url, resp.StatusCode)
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}
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var r json.RawMessage
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err = json.NewDecoder(resp.Body).Decode(&r)
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if err != nil {
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return nil, fmt.Errorf("JSON decode failed for %s %s. Response code: %d", method, url, resp.StatusCode)
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}
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return r, nil
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}
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// RackspaceRecords is the list of records sent/recieved from the DNS API
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type RackspaceRecords struct {
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RackspaceRecord []RackspaceRecord `json:"records"`
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}
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// RackspaceRecord represents a Rackspace DNS record
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type RackspaceRecord struct {
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Name string `json:"name"`
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Type string `json:"type"`
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Data string `json:"data"`
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TTL int `json:"ttl,omitempty"`
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ID string `json:"id,omitempty"`
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}
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