Upgrading server dependancies (#6215)

6 files changed, 281 insertions, 33 deletions

diff --git a/vendor/github.com/NYTimes/gziphandler/.travis.yml b/vendor/github.com/NYTimes/gziphandler/.travis.yml
index f918f8d76..d2b67f69c 100644
--- a/vendor/github.com/NYTimes/gziphandler/.travis.yml
+++ b/vendor/github.com/NYTimes/gziphandler/.travis.yml
@@ -2,4 +2,5 @@ language: go
 
 go:
   - 1.7
+  - 1.8
   - tip
diff --git a/vendor/github.com/NYTimes/gziphandler/README.md b/vendor/github.com/NYTimes/gziphandler/README.md
index b1d55e26e..6d7246070 100644
--- a/vendor/github.com/NYTimes/gziphandler/README.md
+++ b/vendor/github.com/NYTimes/gziphandler/README.md
@@ -38,12 +38,12 @@ func main() {
 
 ## Documentation
 
-The docs can be found at [godoc.org] [docs], as usual.
+The docs can be found at [godoc.org][docs], as usual.
 
 
 ## License
 
-[Apache 2.0] [license].
+[Apache 2.0][license].
 
 
 
diff --git a/vendor/github.com/NYTimes/gziphandler/gzip.go b/vendor/github.com/NYTimes/gziphandler/gzip.go
index 23efacc45..cccf79de7 100644
--- a/vendor/github.com/NYTimes/gziphandler/gzip.go
+++ b/vendor/github.com/NYTimes/gziphandler/gzip.go
@@ -4,6 +4,7 @@ import (
 	"bufio"
 	"compress/gzip"
 	"fmt"
+	"io"
 	"net"
 	"net/http"
 	"strconv"
@@ -21,10 +22,16 @@ const (
 
 type codings map[string]float64
 
-// The default qvalue to assign to an encoding if no explicit qvalue is set.
-// This is actually kind of ambiguous in RFC 2616, so hopefully it's correct.
-// The examples seem to indicate that it is.
-const DEFAULT_QVALUE = 1.0
+const (
+	// DefaultQValue is the default qvalue to assign to an encoding if no explicit qvalue is set.
+	// This is actually kind of ambiguous in RFC 2616, so hopefully it's correct.
+	// The examples seem to indicate that it is.
+	DefaultQValue = 1.0
+
+	// DefaultMinSize defines the minimum size to reach to enable compression.
+	// It's 512 bytes.
+	DefaultMinSize = 512
+)
 
 // gzipWriterPools stores a sync.Pool for each compression level for reuse of
 // gzip.Writers. Use poolIndex to covert a compression level to an index into
@@ -63,35 +70,88 @@ func addLevelPool(level int) {
 // GzipResponseWriter provides an http.ResponseWriter interface, which gzips
 // bytes before writing them to the underlying response. This doesn't close the
 // writers, so don't forget to do that.
+// It can be configured to skip response smaller than minSize.
 type GzipResponseWriter struct {
 	http.ResponseWriter
 	index int // Index for gzipWriterPools.
 	gw    *gzip.Writer
+
+	code int // Saves the WriteHeader value.
+
+	minSize int    // Specifed the minimum response size to gzip. If the response length is bigger than this value, it is compressed.
+	buf     []byte // Holds the first part of the write before reaching the minSize or the end of the write.
 }
 
 // Write appends data to the gzip writer.
 func (w *GzipResponseWriter) Write(b []byte) (int, error) {
-	// Lazily create the gzip.Writer, this allows empty bodies to be actually
-	// empty, for example in the case of status code 204 (no content).
-	if w.gw == nil {
-		w.init()
-	}
-
+	// If content type is not set.
 	if _, ok := w.Header()[contentType]; !ok {
-		// If content type is not set, infer it from the uncompressed body.
+		// It infer it from the uncompressed body.
 		w.Header().Set(contentType, http.DetectContentType(b))
 	}
-	return w.gw.Write(b)
+
+	// GZIP responseWriter is initialized. Use the GZIP responseWriter.
+	if w.gw != nil {
+		n, err := w.gw.Write(b)
+		return n, err
+	}
+
+	// Save the write into a buffer for later use in GZIP responseWriter (if content is long enough) or at close with regular responseWriter.
+	w.buf = append(w.buf, b...)
+
+	// If the global writes are bigger than the minSize, compression is enable.
+	if len(w.buf) >= w.minSize {
+		err := w.startGzip()
+		if err != nil {
+			return 0, err
+		}
+	}
+
+	return len(b), nil
+}
+
+// startGzip initialize any GZIP specific informations.
+func (w *GzipResponseWriter) startGzip() error {
+
+	// Set the GZIP header.
+	w.Header().Set(contentEncoding, "gzip")
+
+	// if the Content-Length is already set, then calls to Write on gzip
+	// will fail to set the Content-Length header since its already set
+	// See: https://github.com/golang/go/issues/14975.
+	w.Header().Del(contentLength)
+
+	// Write the header to gzip response.
+	w.writeHeader()
+
+	// Initialize the GZIP response.
+	w.init()
+
+	// Flush the buffer into the gzip reponse.
+	n, err := w.gw.Write(w.buf)
+
+	// This should never happen (per io.Writer docs), but if the write didn't
+	// accept the entire buffer but returned no specific error, we have no clue
+	// what's going on, so abort just to be safe.
+	if err == nil && n < len(w.buf) {
+		return io.ErrShortWrite
+	}
+
+	w.buf = nil
+	return err
 }
 
-// WriteHeader will check if the gzip writer needs to be lazily initiated and
-// then pass the code along to the underlying ResponseWriter.
+// WriteHeader just saves the response code until close or GZIP effective writes.
 func (w *GzipResponseWriter) WriteHeader(code int) {
-	if w.gw == nil &&
-		code != http.StatusNotModified && code != http.StatusNoContent {
-		w.init()
+	w.code = code
+}
+
+// writeHeader uses the saved code to send it to the ResponseWriter.
+func (w *GzipResponseWriter) writeHeader() {
+	if w.code == 0 {
+		w.code = http.StatusOK
 	}
-	w.ResponseWriter.WriteHeader(code)
+	w.ResponseWriter.WriteHeader(w.code)
 }
 
 // init graps a new gzip writer from the gzipWriterPool and writes the correct
@@ -102,15 +162,22 @@ func (w *GzipResponseWriter) init() {
 	gzw := gzipWriterPools[w.index].Get().(*gzip.Writer)
 	gzw.Reset(w.ResponseWriter)
 	w.gw = gzw
-	w.ResponseWriter.Header().Set(contentEncoding, "gzip")
-	// if the Content-Length is already set, then calls to Write on gzip
-	// will fail to set the Content-Length header since its already set
-	// See: https://github.com/golang/go/issues/14975
-	w.ResponseWriter.Header().Del(contentLength)
 }
 
 // Close will close the gzip.Writer and will put it back in the gzipWriterPool.
 func (w *GzipResponseWriter) Close() error {
+	// Buffer not nil means the regular response must be returned.
+	if w.buf != nil {
+		w.writeHeader()
+		// Make the write into the regular response.
+		_, writeErr := w.ResponseWriter.Write(w.buf)
+		// Returns the error if any at write.
+		if writeErr != nil {
+			return fmt.Errorf("gziphandler: write to regular responseWriter at close gets error: %q", writeErr.Error())
+		}
+	}
+
+	// If the GZIP responseWriter is not set no needs to close it.
 	if w.gw == nil {
 		return nil
 	}
@@ -163,9 +230,18 @@ func MustNewGzipLevelHandler(level int) func(http.Handler) http.Handler {
 // if an invalid gzip compression level is given, so if one can ensure the level
 // is valid, the returned error can be safely ignored.
 func NewGzipLevelHandler(level int) (func(http.Handler) http.Handler, error) {
+	return NewGzipLevelAndMinSize(level, DefaultMinSize)
+}
+
+// NewGzipLevelAndMinSize behave as NewGzipLevelHandler except it let the caller
+// specify the minimum size before compression.
+func NewGzipLevelAndMinSize(level, minSize int) (func(http.Handler) http.Handler, error) {
 	if level != gzip.DefaultCompression && (level < gzip.BestSpeed || level > gzip.BestCompression) {
 		return nil, fmt.Errorf("invalid compression level requested: %d", level)
 	}
+	if minSize < 0 {
+		return nil, fmt.Errorf("minimum size must be more than zero")
+	}
 	return func(h http.Handler) http.Handler {
 		index := poolIndex(level)
 
@@ -176,6 +252,9 @@ func NewGzipLevelHandler(level int) (func(http.Handler) http.Handler, error) {
 				gw := &GzipResponseWriter{
 					ResponseWriter: w,
 					index:          index,
+					minSize:        minSize,
+
+					buf: []byte{},
 				}
 				defer gw.Close()
 
@@ -238,7 +317,7 @@ func parseEncodings(s string) (codings, error) {
 func parseCoding(s string) (coding string, qvalue float64, err error) {
 	for n, part := range strings.Split(s, ";") {
 		part = strings.TrimSpace(part)
-		qvalue = DEFAULT_QVALUE
+		qvalue = DefaultQValue
 
 		if n == 0 {
 			coding = strings.ToLower(part)
diff --git a/vendor/github.com/NYTimes/gziphandler/gzip_go18.go b/vendor/github.com/NYTimes/gziphandler/gzip_go18.go
new file mode 100644
index 000000000..fa9665b7e
--- /dev/null
+++ b/vendor/github.com/NYTimes/gziphandler/gzip_go18.go
@@ -0,0 +1,43 @@
+// +build go1.8
+
+package gziphandler
+
+import "net/http"
+
+// Push initiates an HTTP/2 server push.
+// Push returns ErrNotSupported if the client has disabled push or if push
+// is not supported on the underlying connection.
+func (w *GzipResponseWriter) Push(target string, opts *http.PushOptions) error {
+	pusher, ok := w.ResponseWriter.(http.Pusher)
+	if ok && pusher != nil {
+		return pusher.Push(target, setAcceptEncodingForPushOptions(opts))
+	}
+	return http.ErrNotSupported
+}
+
+// setAcceptEncodingForPushOptions sets "Accept-Encoding" : "gzip" for PushOptions without overriding existing headers.
+func setAcceptEncodingForPushOptions(opts *http.PushOptions) *http.PushOptions {
+
+	if opts == nil {
+		opts = &http.PushOptions{
+			Header: http.Header{
+				acceptEncoding: []string{"gzip"},
+			},
+		}
+		return opts
+	}
+
+	if opts.Header == nil {
+		opts.Header = http.Header{
+			acceptEncoding: []string{"gzip"},
+		}
+		return opts
+	}
+
+	if encoding := opts.Header.Get(acceptEncoding); encoding == "" {
+		opts.Header.Add(acceptEncoding, "gzip")
+		return opts
+	}
+
+	return opts
+}
diff --git a/vendor/github.com/NYTimes/gziphandler/gzip_go18_test.go b/vendor/github.com/NYTimes/gziphandler/gzip_go18_test.go
new file mode 100644
index 000000000..412b2918e
--- /dev/null
+++ b/vendor/github.com/NYTimes/gziphandler/gzip_go18_test.go
@@ -0,0 +1,70 @@
+// +build go1.8
+
+package gziphandler
+
+import (
+	"net/http"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestSetAcceptEncodingForPushOptionsWithoutHeaders(t *testing.T) {
+	var opts *http.PushOptions
+	opts = setAcceptEncodingForPushOptions(opts)
+
+	assert.NotNil(t, opts)
+	assert.NotNil(t, opts.Header)
+
+	for k, v := range opts.Header {
+		assert.Equal(t, "Accept-Encoding", k)
+		assert.Len(t, v, 1)
+		assert.Equal(t, "gzip", v[0])
+	}
+
+	opts = &http.PushOptions{}
+	opts = setAcceptEncodingForPushOptions(opts)
+
+	assert.NotNil(t, opts)
+	assert.NotNil(t, opts.Header)
+
+	for k, v := range opts.Header {
+		assert.Equal(t, "Accept-Encoding", k)
+		assert.Len(t, v, 1)
+		assert.Equal(t, "gzip", v[0])
+	}
+}
+
+func TestSetAcceptEncodingForPushOptionsWithHeaders(t *testing.T) {
+	opts := &http.PushOptions{
+		Header: http.Header{
+			"User-Agent": []string{"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.98 Safari/537.36"},
+		},
+	}
+	opts = setAcceptEncodingForPushOptions(opts)
+
+	assert.NotNil(t, opts)
+	assert.NotNil(t, opts.Header)
+
+	assert.Equal(t, "gzip", opts.Header.Get("Accept-Encoding"))
+	assert.Equal(t, "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.98 Safari/537.36", opts.Header.Get("User-Agent"))
+
+	opts = &http.PushOptions{
+		Header: http.Header{
+			"User-Agent":   []string{"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.98 Safari/537.36"},
+			acceptEncoding: []string{"deflate"},
+		},
+	}
+	opts = setAcceptEncodingForPushOptions(opts)
+
+	assert.NotNil(t, opts)
+	assert.NotNil(t, opts.Header)
+
+	e, found := opts.Header["Accept-Encoding"]
+	if !found {
+		assert.Fail(t, "Missing Accept-Encoding header value")
+	}
+	assert.Len(t, e, 1)
+	assert.Equal(t, "deflate", e[0])
+	assert.Equal(t, "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.98 Safari/537.36", opts.Header.Get("User-Agent"))
+}
diff --git a/vendor/github.com/NYTimes/gziphandler/gzip_test.go b/vendor/github.com/NYTimes/gziphandler/gzip_test.go
index 80f54c77d..b9e687c8e 100644
--- a/vendor/github.com/NYTimes/gziphandler/gzip_test.go
+++ b/vendor/github.com/NYTimes/gziphandler/gzip_test.go
@@ -16,8 +16,12 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func TestParseEncodings(t *testing.T) {
+const (
+	smallTestBody = "aaabbcaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbccc"
+	testBody      = "aaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbcccaaabbbccc"
+)
 
+func TestParseEncodings(t *testing.T) {
 	examples := map[string]codings{
 
 		// Examples from RFC 2616
@@ -39,8 +43,6 @@ func TestParseEncodings(t *testing.T) {
 }
 
 func TestGzipHandler(t *testing.T) {
-	testBody := "aaabbbccc"
-
 	// This just exists to provide something for GzipHandler to wrap.
 	handler := newTestHandler(testBody)
 
@@ -80,7 +82,6 @@ func TestGzipHandler(t *testing.T) {
 }
 
 func TestNewGzipLevelHandler(t *testing.T) {
-	testBody := "aaabbbccc"
 	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusOK)
 		io.WriteString(w, testBody)
@@ -102,7 +103,6 @@ func TestNewGzipLevelHandler(t *testing.T) {
 		assert.Equal(t, "gzip", res.Header.Get("Content-Encoding"))
 		assert.Equal(t, "Accept-Encoding", res.Header.Get("Vary"))
 		assert.Equal(t, gzipStrLevel(testBody, lvl), resp.Body.Bytes())
-
 	}
 }
 
@@ -135,7 +135,7 @@ func TestGzipHandlerNoBody(t *testing.T) {
 		{http.StatusNoContent, "", 0},
 		{http.StatusNotModified, "", 0},
 		// Body is going to get gzip'd no matter what.
-		{http.StatusOK, "gzip", 23},
+		{http.StatusOK, "", 0},
 	}
 
 	for num, test := range tests {
@@ -170,7 +170,7 @@ func TestGzipHandlerNoBody(t *testing.T) {
 }
 
 func TestGzipHandlerContentLength(t *testing.T) {
-	b := []byte("testtesttesttesttesttesttesttesttesttesttesttesttest")
+	b := []byte(testBody)
 	handler := GzipHandler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Length", strconv.Itoa(len(b)))
 		w.Write(b)
@@ -215,6 +215,48 @@ func TestGzipHandlerContentLength(t *testing.T) {
 	assert.NotEqual(t, b, body)
 }
 
+func TestGzipHandlerMinSizeMustBePositive(t *testing.T) {
+	_, err := NewGzipLevelAndMinSize(gzip.DefaultCompression, -1)
+	assert.Error(t, err)
+}
+
+func TestGzipHandlerMinSize(t *testing.T) {
+	responseLength := 0
+	b := []byte{'x'}
+
+	wrapper, _ := NewGzipLevelAndMinSize(gzip.DefaultCompression, 128)
+	handler := wrapper(http.HandlerFunc(
+		func(w http.ResponseWriter, r *http.Request) {
+			// Write responses one byte at a time to ensure that the flush
+			// mechanism, if used, is working properly.
+			for i := 0; i < responseLength; i++ {
+				n, err := w.Write(b)
+				assert.Equal(t, 1, n)
+				assert.Nil(t, err)
+			}
+		},
+	))
+
+	r, _ := http.NewRequest("GET", "/whatever", &bytes.Buffer{})
+	r.Header.Add("Accept-Encoding", "gzip")
+
+	// Short response is not compressed
+	responseLength = 127
+	w := httptest.NewRecorder()
+	handler.ServeHTTP(w, r)
+	if w.Result().Header.Get(contentEncoding) == "gzip" {
+		t.Error("Expected uncompressed response, got compressed")
+	}
+
+	// Long response is not compressed
+	responseLength = 128
+	w = httptest.NewRecorder()
+	handler.ServeHTTP(w, r)
+	if w.Result().Header.Get(contentEncoding) != "gzip" {
+		t.Error("Expected compressed response, got uncompressed")
+	}
+}
+
 func TestGzipDoubleClose(t *testing.T) {
 	// reset the pool for the default compression so we can make sure duplicates
 	// aren't added back by double close
@@ -240,6 +282,19 @@ func TestGzipDoubleClose(t *testing.T) {
 	assert.False(t, w1 == w2)
 }
 
+func TestStatusCodes(t *testing.T) {
+	handler := GzipHandler(http.NotFoundHandler())
+	r := httptest.NewRequest("GET", "/", nil)
+	r.Header.Set("Accept-Encoding", "gzip")
+	w := httptest.NewRecorder()
+	handler.ServeHTTP(w, r)
+
+	result := w.Result()
+	if result.StatusCode != 404 {
+		t.Errorf("StatusCode should have been 404 but was %d", result.StatusCode)
+	}
+}
+
 // --------------------------------------------------------------------
 
 func BenchmarkGzipHandler_S2k(b *testing.B)   { benchmark(b, false, 2048) }