Merge v1.2.1-master
Signed-off-by: Emile Vauge <emile@vauge.com>
This commit is contained in:
parent
a590155b0b
commit
aeb17182b4
396 changed files with 27271 additions and 9969 deletions
130
vendor/github.com/NYTimes/gziphandler/gzip.go
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vendored
130
vendor/github.com/NYTimes/gziphandler/gzip.go
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vendored
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@ -4,6 +4,7 @@ import (
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"bufio"
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"compress/gzip"
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"fmt"
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"io"
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"net"
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"net/http"
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"strconv"
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@ -21,10 +22,16 @@ const (
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type codings map[string]float64
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// The default qvalue to assign to an encoding if no explicit qvalue is set.
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// This is actually kind of ambiguous in RFC 2616, so hopefully it's correct.
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// The examples seem to indicate that it is.
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const DEFAULT_QVALUE = 1.0
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const (
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// DefaultQValue is the default qvalue to assign to an encoding if no explicit qvalue is set.
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// This is actually kind of ambiguous in RFC 2616, so hopefully it's correct.
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// The examples seem to indicate that it is.
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DefaultQValue = 1.0
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// DefaultMinSize defines the minimum size to reach to enable compression.
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// It's 512 bytes.
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DefaultMinSize = 512
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)
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// gzipWriterPools stores a sync.Pool for each compression level for reuse of
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// gzip.Writers. Use poolIndex to covert a compression level to an index into
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@ -63,35 +70,88 @@ func addLevelPool(level int) {
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// GzipResponseWriter provides an http.ResponseWriter interface, which gzips
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// bytes before writing them to the underlying response. This doesn't close the
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// writers, so don't forget to do that.
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// It can be configured to skip response smaller than minSize.
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type GzipResponseWriter struct {
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http.ResponseWriter
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index int // Index for gzipWriterPools.
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gw *gzip.Writer
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code int // Saves the WriteHeader value.
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minSize int // Specifed the minimum response size to gzip. If the response length is bigger than this value, it is compressed.
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buf []byte // Holds the first part of the write before reaching the minSize or the end of the write.
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}
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// Write appends data to the gzip writer.
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func (w *GzipResponseWriter) Write(b []byte) (int, error) {
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// Lazily create the gzip.Writer, this allows empty bodies to be actually
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// empty, for example in the case of status code 204 (no content).
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if w.gw == nil {
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w.init()
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}
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// If content type is not set.
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if _, ok := w.Header()[contentType]; !ok {
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// If content type is not set, infer it from the uncompressed body.
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// It infer it from the uncompressed body.
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w.Header().Set(contentType, http.DetectContentType(b))
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}
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return w.gw.Write(b)
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// GZIP responseWriter is initialized. Use the GZIP responseWriter.
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if w.gw != nil {
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n, err := w.gw.Write(b)
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return n, err
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}
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// Save the write into a buffer for later use in GZIP responseWriter (if content is long enough) or at close with regular responseWriter.
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w.buf = append(w.buf, b...)
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// If the global writes are bigger than the minSize, compression is enable.
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if len(w.buf) >= w.minSize {
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err := w.startGzip()
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if err != nil {
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return 0, err
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}
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}
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return len(b), nil
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}
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// WriteHeader will check if the gzip writer needs to be lazily initiated and
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// then pass the code along to the underlying ResponseWriter.
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func (w *GzipResponseWriter) WriteHeader(code int) {
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if w.gw == nil &&
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code != http.StatusNotModified && code != http.StatusNoContent {
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w.init()
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// startGzip initialize any GZIP specific informations.
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func (w *GzipResponseWriter) startGzip() error {
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// Set the GZIP header.
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w.Header().Set(contentEncoding, "gzip")
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// if the Content-Length is already set, then calls to Write on gzip
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// will fail to set the Content-Length header since its already set
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// See: https://github.com/golang/go/issues/14975.
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w.Header().Del(contentLength)
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// Write the header to gzip response.
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w.writeHeader()
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// Initialize the GZIP response.
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w.init()
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// Flush the buffer into the gzip reponse.
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n, err := w.gw.Write(w.buf)
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// This should never happen (per io.Writer docs), but if the write didn't
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// accept the entire buffer but returned no specific error, we have no clue
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// what's going on, so abort just to be safe.
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if err == nil && n < len(w.buf) {
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return io.ErrShortWrite
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}
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w.ResponseWriter.WriteHeader(code)
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w.buf = nil
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return err
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}
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// WriteHeader just saves the response code until close or GZIP effective writes.
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func (w *GzipResponseWriter) WriteHeader(code int) {
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w.code = code
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}
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// writeHeader uses the saved code to send it to the ResponseWriter.
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func (w *GzipResponseWriter) writeHeader() {
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if w.code == 0 {
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w.code = http.StatusOK
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}
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w.ResponseWriter.WriteHeader(w.code)
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}
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// init graps a new gzip writer from the gzipWriterPool and writes the correct
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@ -102,21 +162,29 @@ func (w *GzipResponseWriter) init() {
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gzw := gzipWriterPools[w.index].Get().(*gzip.Writer)
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gzw.Reset(w.ResponseWriter)
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w.gw = gzw
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w.ResponseWriter.Header().Set(contentEncoding, "gzip")
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// if the Content-Length is already set, then calls to Write on gzip
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// will fail to set the Content-Length header since its already set
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// See: https://github.com/golang/go/issues/14975
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w.ResponseWriter.Header().Del(contentLength)
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}
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// Close will close the gzip.Writer and will put it back in the gzipWriterPool.
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func (w *GzipResponseWriter) Close() error {
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// Buffer not nil means the regular response must be returned.
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if w.buf != nil {
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w.writeHeader()
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// Make the write into the regular response.
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_, writeErr := w.ResponseWriter.Write(w.buf)
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// Returns the error if any at write.
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if writeErr != nil {
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return fmt.Errorf("gziphandler: write to regular responseWriter at close gets error: %q", writeErr.Error())
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}
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}
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// If the GZIP responseWriter is not set no needs to close it.
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if w.gw == nil {
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return nil
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}
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err := w.gw.Close()
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gzipWriterPools[w.index].Put(w.gw)
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w.gw = nil
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return err
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}
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@ -162,9 +230,18 @@ func MustNewGzipLevelHandler(level int) func(http.Handler) http.Handler {
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// if an invalid gzip compression level is given, so if one can ensure the level
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// is valid, the returned error can be safely ignored.
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func NewGzipLevelHandler(level int) (func(http.Handler) http.Handler, error) {
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return NewGzipLevelAndMinSize(level, DefaultMinSize)
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}
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// NewGzipLevelAndMinSize behave as NewGzipLevelHandler except it let the caller
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// specify the minimum size before compression.
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func NewGzipLevelAndMinSize(level, minSize int) (func(http.Handler) http.Handler, error) {
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if level != gzip.DefaultCompression && (level < gzip.BestSpeed || level > gzip.BestCompression) {
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return nil, fmt.Errorf("invalid compression level requested: %d", level)
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}
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if minSize < 0 {
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return nil, fmt.Errorf("minimum size must be more than zero")
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}
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return func(h http.Handler) http.Handler {
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index := poolIndex(level)
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@ -175,6 +252,9 @@ func NewGzipLevelHandler(level int) (func(http.Handler) http.Handler, error) {
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gw := &GzipResponseWriter{
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ResponseWriter: w,
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index: index,
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minSize: minSize,
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buf: []byte{},
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}
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defer gw.Close()
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@ -237,7 +317,7 @@ func parseEncodings(s string) (codings, error) {
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func parseCoding(s string) (coding string, qvalue float64, err error) {
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for n, part := range strings.Split(s, ";") {
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part = strings.TrimSpace(part)
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qvalue = DEFAULT_QVALUE
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qvalue = DefaultQValue
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if n == 0 {
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coding = strings.ToLower(part)
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43
vendor/github.com/NYTimes/gziphandler/gzip_go18.go
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43
vendor/github.com/NYTimes/gziphandler/gzip_go18.go
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@ -0,0 +1,43 @@
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// +build go1.8
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package gziphandler
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import "net/http"
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// Push initiates an HTTP/2 server push.
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// Push returns ErrNotSupported if the client has disabled push or if push
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// is not supported on the underlying connection.
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func (w *GzipResponseWriter) Push(target string, opts *http.PushOptions) error {
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pusher, ok := w.ResponseWriter.(http.Pusher)
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if ok && pusher != nil {
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return pusher.Push(target, setAcceptEncodingForPushOptions(opts))
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}
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return http.ErrNotSupported
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}
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// setAcceptEncodingForPushOptions sets "Accept-Encoding" : "gzip" for PushOptions without overriding existing headers.
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func setAcceptEncodingForPushOptions(opts *http.PushOptions) *http.PushOptions {
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if opts == nil {
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opts = &http.PushOptions{
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Header: http.Header{
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acceptEncoding: []string{"gzip"},
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},
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}
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return opts
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}
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if opts.Header == nil {
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opts.Header = http.Header{
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acceptEncoding: []string{"gzip"},
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}
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return opts
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}
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if encoding := opts.Header.Get(acceptEncoding); encoding == "" {
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opts.Header.Add(acceptEncoding, "gzip")
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return opts
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}
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return opts
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}
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