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- // Copyright 2017 The Prometheus Authors
- // Licensed under the Apache License, Version 2.0 (the "License");
- // you may not use this file except in compliance with the License.
- // You may obtain a copy of the License at
- //
- // http://www.apache.org/licenses/LICENSE-2.0
- //
- // Unless required by applicable law or agreed to in writing, software
- // distributed under the License is distributed on an "AS IS" BASIS,
- // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- // See the License for the specific language governing permissions and
- // limitations under the License.
- // +build go1.8
- package promhttp
- import (
- "io"
- "net/http"
- )
- type pusherDelegator struct{ *responseWriterDelegator }
- func (d pusherDelegator) Push(target string, opts *http.PushOptions) error {
- return d.ResponseWriter.(http.Pusher).Push(target, opts)
- }
- func init() {
- pickDelegator[pusher] = func(d *responseWriterDelegator) delegator { // 16
- return pusherDelegator{d}
- }
- pickDelegator[pusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 17
- return struct {
- *responseWriterDelegator
- http.Pusher
- http.CloseNotifier
- }{d, pusherDelegator{d}, closeNotifierDelegator{d}}
- }
- pickDelegator[pusher+flusher] = func(d *responseWriterDelegator) delegator { // 18
- return struct {
- *responseWriterDelegator
- http.Pusher
- http.Flusher
- }{d, pusherDelegator{d}, flusherDelegator{d}}
- }
- pickDelegator[pusher+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 19
- return struct {
- *responseWriterDelegator
- http.Pusher
- http.Flusher
- http.CloseNotifier
- }{d, pusherDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}}
- }
- pickDelegator[pusher+hijacker] = func(d *responseWriterDelegator) delegator { // 20
- return struct {
- *responseWriterDelegator
- http.Pusher
- http.Hijacker
- }{d, pusherDelegator{d}, hijackerDelegator{d}}
- }
- pickDelegator[pusher+hijacker+closeNotifier] = func(d *responseWriterDelegator) delegator { // 21
- return struct {
- *responseWriterDelegator
- http.Pusher
- http.Hijacker
- http.CloseNotifier
- }{d, pusherDelegator{d}, hijackerDelegator{d}, closeNotifierDelegator{d}}
- }
- pickDelegator[pusher+hijacker+flusher] = func(d *responseWriterDelegator) delegator { // 22
- return struct {
- *responseWriterDelegator
- http.Pusher
- http.Hijacker
- http.Flusher
- }{d, pusherDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}}
- }
- pickDelegator[pusher+hijacker+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { //23
- return struct {
- *responseWriterDelegator
- http.Pusher
- http.Hijacker
- http.Flusher
- http.CloseNotifier
- }{d, pusherDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}}
- }
- pickDelegator[pusher+readerFrom] = func(d *responseWriterDelegator) delegator { // 24
- return struct {
- *responseWriterDelegator
- http.Pusher
- io.ReaderFrom
- }{d, pusherDelegator{d}, readerFromDelegator{d}}
- }
- pickDelegator[pusher+readerFrom+closeNotifier] = func(d *responseWriterDelegator) delegator { // 25
- return struct {
- *responseWriterDelegator
- http.Pusher
- io.ReaderFrom
- http.CloseNotifier
- }{d, pusherDelegator{d}, readerFromDelegator{d}, closeNotifierDelegator{d}}
- }
- pickDelegator[pusher+readerFrom+flusher] = func(d *responseWriterDelegator) delegator { // 26
- return struct {
- *responseWriterDelegator
- http.Pusher
- io.ReaderFrom
- http.Flusher
- }{d, pusherDelegator{d}, readerFromDelegator{d}, flusherDelegator{d}}
- }
- pickDelegator[pusher+readerFrom+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 27
- return struct {
- *responseWriterDelegator
- http.Pusher
- io.ReaderFrom
- http.Flusher
- http.CloseNotifier
- }{d, pusherDelegator{d}, readerFromDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}}
- }
- pickDelegator[pusher+readerFrom+hijacker] = func(d *responseWriterDelegator) delegator { // 28
- return struct {
- *responseWriterDelegator
- http.Pusher
- io.ReaderFrom
- http.Hijacker
- }{d, pusherDelegator{d}, readerFromDelegator{d}, hijackerDelegator{d}}
- }
- pickDelegator[pusher+readerFrom+hijacker+closeNotifier] = func(d *responseWriterDelegator) delegator { // 29
- return struct {
- *responseWriterDelegator
- http.Pusher
- io.ReaderFrom
- http.Hijacker
- http.CloseNotifier
- }{d, pusherDelegator{d}, readerFromDelegator{d}, hijackerDelegator{d}, closeNotifierDelegator{d}}
- }
- pickDelegator[pusher+readerFrom+hijacker+flusher] = func(d *responseWriterDelegator) delegator { // 30
- return struct {
- *responseWriterDelegator
- http.Pusher
- io.ReaderFrom
- http.Hijacker
- http.Flusher
- }{d, pusherDelegator{d}, readerFromDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}}
- }
- pickDelegator[pusher+readerFrom+hijacker+flusher+closeNotifier] = func(d *responseWriterDelegator) delegator { // 31
- return struct {
- *responseWriterDelegator
- http.Pusher
- io.ReaderFrom
- http.Hijacker
- http.Flusher
- http.CloseNotifier
- }{d, pusherDelegator{d}, readerFromDelegator{d}, hijackerDelegator{d}, flusherDelegator{d}, closeNotifierDelegator{d}}
- }
- }
- func newDelegator(w http.ResponseWriter, observeWriteHeaderFunc func(int)) delegator {
- d := &responseWriterDelegator{
- ResponseWriter: w,
- observeWriteHeader: observeWriteHeaderFunc,
- }
- id := 0
- if _, ok := w.(http.CloseNotifier); ok {
- id += closeNotifier
- }
- if _, ok := w.(http.Flusher); ok {
- id += flusher
- }
- if _, ok := w.(http.Hijacker); ok {
- id += hijacker
- }
- if _, ok := w.(io.ReaderFrom); ok {
- id += readerFrom
- }
- if _, ok := w.(http.Pusher); ok {
- id += pusher
- }
- return pickDelegator[id](d)
- }
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