Vendor main dependencies.

vendor/github.com/vulcand/oxy/utils/auth.go

@@ -0,0 +1,41 @@
+package utils
+
+import (
+	"encoding/base64"
+	"fmt"
+	"strings"
+)
+
+type BasicAuth struct {
+	Username string
+	Password string
+}
+
+func (ba *BasicAuth) String() string {
+	encoded := base64.StdEncoding.EncodeToString([]byte(fmt.Sprintf("%s:%s", ba.Username, ba.Password)))
+	return fmt.Sprintf("Basic %s", encoded)
+}
+
+func ParseAuthHeader(header string) (*BasicAuth, error) {
+	values := strings.Fields(header)
+	if len(values) != 2 {
+		return nil, fmt.Errorf(fmt.Sprintf("Failed to parse header '%s'", header))
+	}
+
+	auth_type := strings.ToLower(values[0])
+	if auth_type != "basic" {
+		return nil, fmt.Errorf("Expected basic auth type, got '%s'", auth_type)
+	}
+
+	encoded_string := values[1]
+	decoded_string, err := base64.StdEncoding.DecodeString(encoded_string)
+	if err != nil {
+		return nil, fmt.Errorf("Failed to parse header '%s', base64 failed: %s", header, err)
+	}
+
+	values = strings.SplitN(string(decoded_string), ":", 2)
+	if len(values) != 2 {
+		return nil, fmt.Errorf("Failed to parse header '%s', expected separator ':'", header)
+	}
+	return &BasicAuth{Username: values[0], Password: values[1]}, nil
+}

vendor/github.com/vulcand/oxy/utils/handler.go

@@ -0,0 +1,38 @@
+package utils
+
+import (
+	"io"
+	"net"
+	"net/http"
+)
+
+type ErrorHandler interface {
+	ServeHTTP(w http.ResponseWriter, req *http.Request, err error)
+}
+
+var DefaultHandler ErrorHandler = &StdHandler{}
+
+type StdHandler struct {
+}
+
+func (e *StdHandler) ServeHTTP(w http.ResponseWriter, req *http.Request, err error) {
+	statusCode := http.StatusInternalServerError
+	if e, ok := err.(net.Error); ok {
+		if e.Timeout() {
+			statusCode = http.StatusGatewayTimeout
+		} else {
+			statusCode = http.StatusBadGateway
+		}
+	} else if err == io.EOF {
+		statusCode = http.StatusBadGateway
+	}
+	w.WriteHeader(statusCode)
+	w.Write([]byte(http.StatusText(statusCode)))
+}
+
+type ErrorHandlerFunc func(http.ResponseWriter, *http.Request, error)
+
+// ServeHTTP calls f(w, r).
+func (f ErrorHandlerFunc) ServeHTTP(w http.ResponseWriter, r *http.Request, err error) {
+	f(w, r, err)
+}

vendor/github.com/vulcand/oxy/utils/logging.go

@@ -0,0 +1,86 @@
+package utils
+
+import (
+	"io"
+	"log"
+)
+
+var NullLogger Logger = &NOPLogger{}
+
+// Logger defines a simple logging interface
+type Logger interface {
+	Infof(format string, args ...interface{})
+	Warningf(format string, args ...interface{})
+	Errorf(format string, args ...interface{})
+}
+
+type FileLogger struct {
+	info  *log.Logger
+	warn  *log.Logger
+	error *log.Logger
+}
+
+func NewFileLogger(w io.Writer, lvl LogLevel) *FileLogger {
+	l := &FileLogger{}
+	flag := log.Ldate | log.Ltime | log.Lmicroseconds
+	if lvl <= INFO {
+		l.info = log.New(w, "INFO: ", flag)
+	}
+	if lvl <= WARN {
+		l.warn = log.New(w, "WARN: ", flag)
+	}
+	if lvl <= ERROR {
+		l.error = log.New(w, "ERR: ", flag)
+	}
+	return l
+}
+
+func (f *FileLogger) Infof(format string, args ...interface{}) {
+	if f.info == nil {
+		return
+	}
+	f.info.Printf(format, args...)
+}
+
+func (f *FileLogger) Warningf(format string, args ...interface{}) {
+	if f.warn == nil {
+		return
+	}
+	f.warn.Printf(format, args...)
+}
+
+func (f *FileLogger) Errorf(format string, args ...interface{}) {
+	if f.error == nil {
+		return
+	}
+	f.error.Printf(format, args...)
+}
+
+type NOPLogger struct {
+}
+
+func (*NOPLogger) Infof(format string, args ...interface{}) {
+
+}
+func (*NOPLogger) Warningf(format string, args ...interface{}) {
+}
+
+func (*NOPLogger) Errorf(format string, args ...interface{}) {
+}
+
+func (*NOPLogger) Info(string) {
+
+}
+func (*NOPLogger) Warning(string) {
+}
+
+func (*NOPLogger) Error(string) {
+}
+
+type LogLevel int
+
+const (
+	INFO = iota
+	WARN
+	ERROR
+)

vendor/github.com/vulcand/oxy/utils/netutils.go

@@ -0,0 +1,138 @@
+package utils
+
+import (
+	"bufio"
+	"io"
+	"mime"
+	"net"
+	"net/http"
+	"net/url"
+)
+
+// ProxyWriter helps to capture response headers and status code
+// from the ServeHTTP. It can be safely passed to ServeHTTP handler,
+// wrapping the real response writer.
+type ProxyWriter struct {
+	W    http.ResponseWriter
+	Code int
+}
+
+func (p *ProxyWriter) StatusCode() int {
+	if p.Code == 0 {
+		// per contract standard lib will set this to http.StatusOK if not set
+		// by user, here we avoid the confusion by mirroring this logic
+		return http.StatusOK
+	}
+	return p.Code
+}
+
+func (p *ProxyWriter) Header() http.Header {
+	return p.W.Header()
+}
+
+func (p *ProxyWriter) Write(buf []byte) (int, error) {
+	return p.W.Write(buf)
+}
+
+func (p *ProxyWriter) WriteHeader(code int) {
+	p.Code = code
+	p.W.WriteHeader(code)
+}
+
+func (p *ProxyWriter) Flush() {
+	if f, ok := p.W.(http.Flusher); ok {
+		f.Flush()
+	}
+}
+
+func (p *ProxyWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
+	return p.W.(http.Hijacker).Hijack()
+}
+
+func NewBufferWriter(w io.WriteCloser) *BufferWriter {
+	return &BufferWriter{
+		W: w,
+		H: make(http.Header),
+	}
+}
+
+type BufferWriter struct {
+	H    http.Header
+	Code int
+	W    io.WriteCloser
+}
+
+func (b *BufferWriter) Close() error {
+	return b.W.Close()
+}
+
+func (b *BufferWriter) Header() http.Header {
+	return b.H
+}
+
+func (b *BufferWriter) Write(buf []byte) (int, error) {
+	return b.W.Write(buf)
+}
+
+// WriteHeader sets rw.Code.
+func (b *BufferWriter) WriteHeader(code int) {
+	b.Code = code
+}
+
+func (b *BufferWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
+	return b.W.(http.Hijacker).Hijack()
+}
+
+type nopWriteCloser struct {
+	io.Writer
+}
+
+func (*nopWriteCloser) Close() error { return nil }
+
+// NopCloser returns a WriteCloser with a no-op Close method wrapping
+// the provided Writer w.
+func NopWriteCloser(w io.Writer) io.WriteCloser {
+	return &nopWriteCloser{w}
+}
+
+// CopyURL provides update safe copy by avoiding shallow copying User field
+func CopyURL(i *url.URL) *url.URL {
+	out := *i
+	if i.User != nil {
+		out.User = &(*i.User)
+	}
+	return &out
+}
+
+// CopyHeaders copies http headers from source to destination, it
+// does not overide, but adds multiple headers
+func CopyHeaders(dst, src http.Header) {
+	for k, vv := range src {
+		for _, v := range vv {
+			dst.Add(k, v)
+		}
+	}
+}
+
+// HasHeaders determines whether any of the header names is present in the http headers
+func HasHeaders(names []string, headers http.Header) bool {
+	for _, h := range names {
+		if headers.Get(h) != "" {
+			return true
+		}
+	}
+	return false
+}
+
+// RemoveHeaders removes the header with the given names from the headers map
+func RemoveHeaders(headers http.Header, names ...string) {
+	for _, h := range names {
+		headers.Del(h)
+	}
+}
+
+// Parse the MIME media type value of a header.
+func GetHeaderMediaType(headers http.Header, name string) (string, error)  {
+	mediatype, _, err := mime.ParseMediaType(headers.Get(name))
+	return mediatype, err
+}

vendor/github.com/vulcand/oxy/utils/source.go

@@ -0,0 +1,57 @@
+package utils
+
+import (
+	"fmt"
+	"net/http"
+	"strings"
+)
+
+// ExtractSource extracts the source from the request, e.g. that may be client ip, or particular header that
+// identifies the source. amount stands for amount of connections the source consumes, usually 1 for connection limiters
+// error should be returned when source can not be identified
+type SourceExtractor interface {
+	Extract(req *http.Request) (token string, amount int64, err error)
+}
+
+type ExtractorFunc func(req *http.Request) (token string, amount int64, err error)
+
+func (f ExtractorFunc) Extract(req *http.Request) (string, int64, error) {
+	return f(req)
+}
+
+type ExtractSource func(req *http.Request)
+
+func NewExtractor(variable string) (SourceExtractor, error) {
+	if variable == "client.ip" {
+		return ExtractorFunc(extractClientIP), nil
+	}
+	if variable == "request.host" {
+		return ExtractorFunc(extractHost), nil
+	}
+	if strings.HasPrefix(variable, "request.header.") {
+		header := strings.TrimPrefix(variable, "request.header.")
+		if len(header) == 0 {
+			return nil, fmt.Errorf("Wrong header: %s", header)
+		}
+		return makeHeaderExtractor(header), nil
+	}
+	return nil, fmt.Errorf("Unsupported limiting variable: '%s'", variable)
+}
+
+func extractClientIP(req *http.Request) (string, int64, error) {
+	vals := strings.SplitN(req.RemoteAddr, ":", 2)
+	if len(vals[0]) == 0 {
+		return "", 0, fmt.Errorf("Failed to parse client IP: %v", req.RemoteAddr)
+	}
+	return vals[0], 1, nil
+}
+
+func extractHost(req *http.Request) (string, int64, error) {
+	return req.Host, 1, nil
+}
+
+func makeHeaderExtractor(header string) SourceExtractor {
+	return ExtractorFunc(func(req *http.Request) (string, int64, error) {
+		return req.Header.Get(header), 1, nil
+	})
+}