diff options
Diffstat (limited to 'vendor/github.com/NYTimes/gziphandler/gzip_go18.go')
-rw-r--r-- | vendor/github.com/NYTimes/gziphandler/gzip_go18.go | 43 |
1 files changed, 43 insertions, 0 deletions
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 +} |