From efae960e5a3a53cfe338bb33fa8ba61449e9c9c7 Mon Sep 17 00:00:00 2001 From: Sebastiaan van Stijn Date: Mon, 8 Jan 2024 10:55:39 +0100 Subject: [PATCH] vendor: golang.org/x/net v0.19.0 drops various code to support go1.17 and older full diff: https://golang.org/x/net/compare/v0.17.0...v0.19.0 Signed-off-by: Sebastiaan van Stijn --- vendor.mod | 2 +- vendor.sum | 4 +- vendor/golang.org/x/net/http2/databuffer.go | 59 ++++++++++---------- vendor/golang.org/x/net/http2/go111.go | 30 ---------- vendor/golang.org/x/net/http2/go115.go | 27 --------- vendor/golang.org/x/net/http2/go118.go | 17 ------ vendor/golang.org/x/net/http2/not_go111.go | 21 ------- vendor/golang.org/x/net/http2/not_go115.go | 31 ---------- vendor/golang.org/x/net/http2/not_go118.go | 17 ------ vendor/golang.org/x/net/http2/server.go | 24 ++------ vendor/golang.org/x/net/http2/transport.go | 33 ++++++++++- vendor/golang.org/x/net/idna/go118.go | 1 - vendor/golang.org/x/net/idna/idna10.0.0.go | 1 - vendor/golang.org/x/net/idna/idna9.0.0.go | 1 - vendor/golang.org/x/net/idna/pre_go118.go | 1 - vendor/golang.org/x/net/idna/tables10.0.0.go | 1 - vendor/golang.org/x/net/idna/tables11.0.0.go | 1 - vendor/golang.org/x/net/idna/tables12.0.0.go | 1 - vendor/golang.org/x/net/idna/tables13.0.0.go | 1 - vendor/golang.org/x/net/idna/tables15.0.0.go | 1 - vendor/golang.org/x/net/idna/tables9.0.0.go | 1 - vendor/golang.org/x/net/idna/trie12.0.0.go | 1 - vendor/golang.org/x/net/idna/trie13.0.0.go | 1 - vendor/modules.txt | 4 +- 24 files changed, 72 insertions(+), 209 deletions(-) delete mode 100644 vendor/golang.org/x/net/http2/go111.go delete mode 100644 vendor/golang.org/x/net/http2/go115.go delete mode 100644 vendor/golang.org/x/net/http2/go118.go delete mode 100644 vendor/golang.org/x/net/http2/not_go111.go delete mode 100644 vendor/golang.org/x/net/http2/not_go115.go delete mode 100644 vendor/golang.org/x/net/http2/not_go118.go diff --git a/vendor.mod b/vendor.mod index 4cb351f3ec..e1a723e66e 100644 --- a/vendor.mod +++ b/vendor.mod @@ -81,7 +81,7 @@ require ( go.opentelemetry.io/otel/trace v1.19.0 // indirect golang.org/x/crypto v0.17.0 // indirect golang.org/x/mod v0.11.0 // indirect - golang.org/x/net v0.17.0 // indirect + golang.org/x/net v0.19.0 // indirect golang.org/x/time v0.3.0 // indirect golang.org/x/tools v0.10.0 // indirect google.golang.org/genproto/googleapis/rpc v0.0.0-20230711160842-782d3b101e98 // indirect diff --git a/vendor.sum b/vendor.sum index f95ac379cb..05a2c6a431 100644 --- a/vendor.sum +++ b/vendor.sum @@ -308,8 +308,8 @@ golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLL golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU= -golang.org/x/net v0.17.0 h1:pVaXccu2ozPjCXewfr1S7xza/zcXTity9cCdXQYSjIM= -golang.org/x/net v0.17.0/go.mod h1:NxSsAGuq816PNPmqtQdLE42eU2Fs7NoRIZrHJAlaCOE= +golang.org/x/net v0.19.0 h1:zTwKpTd2XuCqf8huc7Fo2iSy+4RHPd10s4KzeTnVr1c= +golang.org/x/net v0.19.0/go.mod h1:CfAk/cbD4CthTvqiEl8NpboMuiuOYsAr/7NOjZJtv1U= golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= diff --git a/vendor/golang.org/x/net/http2/databuffer.go b/vendor/golang.org/x/net/http2/databuffer.go index a3067f8de7..e6f55cbd16 100644 --- a/vendor/golang.org/x/net/http2/databuffer.go +++ b/vendor/golang.org/x/net/http2/databuffer.go @@ -20,41 +20,44 @@ import ( // TODO: Benchmark to determine if the pools are necessary. The GC may have // improved enough that we can instead allocate chunks like this: // make([]byte, max(16<<10, expectedBytesRemaining)) -var ( - dataChunkSizeClasses = []int{ - 1 << 10, - 2 << 10, - 4 << 10, - 8 << 10, - 16 << 10, - } - dataChunkPools = [...]sync.Pool{ - {New: func() interface{} { return make([]byte, 1<<10) }}, - {New: func() interface{} { return make([]byte, 2<<10) }}, - {New: func() interface{} { return make([]byte, 4<<10) }}, - {New: func() interface{} { return make([]byte, 8<<10) }}, - {New: func() interface{} { return make([]byte, 16<<10) }}, - } -) +var dataChunkPools = [...]sync.Pool{ + {New: func() interface{} { return new([1 << 10]byte) }}, + {New: func() interface{} { return new([2 << 10]byte) }}, + {New: func() interface{} { return new([4 << 10]byte) }}, + {New: func() interface{} { return new([8 << 10]byte) }}, + {New: func() interface{} { return new([16 << 10]byte) }}, +} func getDataBufferChunk(size int64) []byte { - i := 0 - for ; i < len(dataChunkSizeClasses)-1; i++ { - if size <= int64(dataChunkSizeClasses[i]) { - break - } + switch { + case size <= 1<<10: + return dataChunkPools[0].Get().(*[1 << 10]byte)[:] + case size <= 2<<10: + return dataChunkPools[1].Get().(*[2 << 10]byte)[:] + case size <= 4<<10: + return dataChunkPools[2].Get().(*[4 << 10]byte)[:] + case size <= 8<<10: + return dataChunkPools[3].Get().(*[8 << 10]byte)[:] + default: + return dataChunkPools[4].Get().(*[16 << 10]byte)[:] } - return dataChunkPools[i].Get().([]byte) } func putDataBufferChunk(p []byte) { - for i, n := range dataChunkSizeClasses { - if len(p) == n { - dataChunkPools[i].Put(p) - return - } + switch len(p) { + case 1 << 10: + dataChunkPools[0].Put((*[1 << 10]byte)(p)) + case 2 << 10: + dataChunkPools[1].Put((*[2 << 10]byte)(p)) + case 4 << 10: + dataChunkPools[2].Put((*[4 << 10]byte)(p)) + case 8 << 10: + dataChunkPools[3].Put((*[8 << 10]byte)(p)) + case 16 << 10: + dataChunkPools[4].Put((*[16 << 10]byte)(p)) + default: + panic(fmt.Sprintf("unexpected buffer len=%v", len(p))) } - panic(fmt.Sprintf("unexpected buffer len=%v", len(p))) } // dataBuffer is an io.ReadWriter backed by a list of data chunks. diff --git a/vendor/golang.org/x/net/http2/go111.go b/vendor/golang.org/x/net/http2/go111.go deleted file mode 100644 index 5bf62b032e..0000000000 --- a/vendor/golang.org/x/net/http2/go111.go +++ /dev/null @@ -1,30 +0,0 @@ -// Copyright 2018 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -//go:build go1.11 -// +build go1.11 - -package http2 - -import ( - "net/http/httptrace" - "net/textproto" -) - -func traceHasWroteHeaderField(trace *httptrace.ClientTrace) bool { - return trace != nil && trace.WroteHeaderField != nil -} - -func traceWroteHeaderField(trace *httptrace.ClientTrace, k, v string) { - if trace != nil && trace.WroteHeaderField != nil { - trace.WroteHeaderField(k, []string{v}) - } -} - -func traceGot1xxResponseFunc(trace *httptrace.ClientTrace) func(int, textproto.MIMEHeader) error { - if trace != nil { - return trace.Got1xxResponse - } - return nil -} diff --git a/vendor/golang.org/x/net/http2/go115.go b/vendor/golang.org/x/net/http2/go115.go deleted file mode 100644 index 908af1ab93..0000000000 --- a/vendor/golang.org/x/net/http2/go115.go +++ /dev/null @@ -1,27 +0,0 @@ -// Copyright 2021 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -//go:build go1.15 -// +build go1.15 - -package http2 - -import ( - "context" - "crypto/tls" -) - -// dialTLSWithContext uses tls.Dialer, added in Go 1.15, to open a TLS -// connection. -func (t *Transport) dialTLSWithContext(ctx context.Context, network, addr string, cfg *tls.Config) (*tls.Conn, error) { - dialer := &tls.Dialer{ - Config: cfg, - } - cn, err := dialer.DialContext(ctx, network, addr) - if err != nil { - return nil, err - } - tlsCn := cn.(*tls.Conn) // DialContext comment promises this will always succeed - return tlsCn, nil -} diff --git a/vendor/golang.org/x/net/http2/go118.go b/vendor/golang.org/x/net/http2/go118.go deleted file mode 100644 index aca4b2b31a..0000000000 --- a/vendor/golang.org/x/net/http2/go118.go +++ /dev/null @@ -1,17 +0,0 @@ -// Copyright 2021 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -//go:build go1.18 -// +build go1.18 - -package http2 - -import ( - "crypto/tls" - "net" -) - -func tlsUnderlyingConn(tc *tls.Conn) net.Conn { - return tc.NetConn() -} diff --git a/vendor/golang.org/x/net/http2/not_go111.go b/vendor/golang.org/x/net/http2/not_go111.go deleted file mode 100644 index cc0baa8197..0000000000 --- a/vendor/golang.org/x/net/http2/not_go111.go +++ /dev/null @@ -1,21 +0,0 @@ -// Copyright 2018 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -//go:build !go1.11 -// +build !go1.11 - -package http2 - -import ( - "net/http/httptrace" - "net/textproto" -) - -func traceHasWroteHeaderField(trace *httptrace.ClientTrace) bool { return false } - -func traceWroteHeaderField(trace *httptrace.ClientTrace, k, v string) {} - -func traceGot1xxResponseFunc(trace *httptrace.ClientTrace) func(int, textproto.MIMEHeader) error { - return nil -} diff --git a/vendor/golang.org/x/net/http2/not_go115.go b/vendor/golang.org/x/net/http2/not_go115.go deleted file mode 100644 index e6c04cf7ac..0000000000 --- a/vendor/golang.org/x/net/http2/not_go115.go +++ /dev/null @@ -1,31 +0,0 @@ -// Copyright 2021 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -//go:build !go1.15 -// +build !go1.15 - -package http2 - -import ( - "context" - "crypto/tls" -) - -// dialTLSWithContext opens a TLS connection. -func (t *Transport) dialTLSWithContext(ctx context.Context, network, addr string, cfg *tls.Config) (*tls.Conn, error) { - cn, err := tls.Dial(network, addr, cfg) - if err != nil { - return nil, err - } - if err := cn.Handshake(); err != nil { - return nil, err - } - if cfg.InsecureSkipVerify { - return cn, nil - } - if err := cn.VerifyHostname(cfg.ServerName); err != nil { - return nil, err - } - return cn, nil -} diff --git a/vendor/golang.org/x/net/http2/not_go118.go b/vendor/golang.org/x/net/http2/not_go118.go deleted file mode 100644 index eab532c96b..0000000000 --- a/vendor/golang.org/x/net/http2/not_go118.go +++ /dev/null @@ -1,17 +0,0 @@ -// Copyright 2021 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -//go:build !go1.18 -// +build !go1.18 - -package http2 - -import ( - "crypto/tls" - "net" -) - -func tlsUnderlyingConn(tc *tls.Conn) net.Conn { - return nil -} diff --git a/vendor/golang.org/x/net/http2/server.go b/vendor/golang.org/x/net/http2/server.go index 02c88b6b3e..ae94c6408d 100644 --- a/vendor/golang.org/x/net/http2/server.go +++ b/vendor/golang.org/x/net/http2/server.go @@ -2549,7 +2549,6 @@ type responseWriterState struct { wroteHeader bool // WriteHeader called (explicitly or implicitly). Not necessarily sent to user yet. sentHeader bool // have we sent the header frame? handlerDone bool // handler has finished - dirty bool // a Write failed; don't reuse this responseWriterState sentContentLen int64 // non-zero if handler set a Content-Length header wroteBytes int64 @@ -2669,7 +2668,6 @@ func (rws *responseWriterState) writeChunk(p []byte) (n int, err error) { date: date, }) if err != nil { - rws.dirty = true return 0, err } if endStream { @@ -2690,7 +2688,6 @@ func (rws *responseWriterState) writeChunk(p []byte) (n int, err error) { if len(p) > 0 || endStream { // only send a 0 byte DATA frame if we're ending the stream. if err := rws.conn.writeDataFromHandler(rws.stream, p, endStream); err != nil { - rws.dirty = true return 0, err } } @@ -2702,9 +2699,6 @@ func (rws *responseWriterState) writeChunk(p []byte) (n int, err error) { trailers: rws.trailers, endStream: true, }) - if err != nil { - rws.dirty = true - } return len(p), err } return len(p), nil @@ -2920,14 +2914,12 @@ func (rws *responseWriterState) writeHeader(code int) { h.Del("Transfer-Encoding") } - if rws.conn.writeHeaders(rws.stream, &writeResHeaders{ + rws.conn.writeHeaders(rws.stream, &writeResHeaders{ streamID: rws.stream.id, httpResCode: code, h: h, endStream: rws.handlerDone && !rws.hasTrailers(), - }) != nil { - rws.dirty = true - } + }) return } @@ -2992,19 +2984,10 @@ func (w *responseWriter) write(lenData int, dataB []byte, dataS string) (n int, func (w *responseWriter) handlerDone() { rws := w.rws - dirty := rws.dirty rws.handlerDone = true w.Flush() w.rws = nil - if !dirty { - // Only recycle the pool if all prior Write calls to - // the serverConn goroutine completed successfully. If - // they returned earlier due to resets from the peer - // there might still be write goroutines outstanding - // from the serverConn referencing the rws memory. See - // issue 20704. - responseWriterStatePool.Put(rws) - } + responseWriterStatePool.Put(rws) } // Push errors. @@ -3187,6 +3170,7 @@ func (sc *serverConn) startPush(msg *startPushRequest) { panic(fmt.Sprintf("newWriterAndRequestNoBody(%+v): %v", msg.url, err)) } + sc.curHandlers++ go sc.runHandler(rw, req, sc.handler.ServeHTTP) return promisedID, nil } diff --git a/vendor/golang.org/x/net/http2/transport.go b/vendor/golang.org/x/net/http2/transport.go index 4515b22c4a..df578b86c6 100644 --- a/vendor/golang.org/x/net/http2/transport.go +++ b/vendor/golang.org/x/net/http2/transport.go @@ -1018,7 +1018,7 @@ func (cc *ClientConn) forceCloseConn() { if !ok { return } - if nc := tlsUnderlyingConn(tc); nc != nil { + if nc := tc.NetConn(); nc != nil { nc.Close() } } @@ -3201,3 +3201,34 @@ func traceFirstResponseByte(trace *httptrace.ClientTrace) { trace.GotFirstResponseByte() } } + +func traceHasWroteHeaderField(trace *httptrace.ClientTrace) bool { + return trace != nil && trace.WroteHeaderField != nil +} + +func traceWroteHeaderField(trace *httptrace.ClientTrace, k, v string) { + if trace != nil && trace.WroteHeaderField != nil { + trace.WroteHeaderField(k, []string{v}) + } +} + +func traceGot1xxResponseFunc(trace *httptrace.ClientTrace) func(int, textproto.MIMEHeader) error { + if trace != nil { + return trace.Got1xxResponse + } + return nil +} + +// dialTLSWithContext uses tls.Dialer, added in Go 1.15, to open a TLS +// connection. +func (t *Transport) dialTLSWithContext(ctx context.Context, network, addr string, cfg *tls.Config) (*tls.Conn, error) { + dialer := &tls.Dialer{ + Config: cfg, + } + cn, err := dialer.DialContext(ctx, network, addr) + if err != nil { + return nil, err + } + tlsCn := cn.(*tls.Conn) // DialContext comment promises this will always succeed + return tlsCn, nil +} diff --git a/vendor/golang.org/x/net/idna/go118.go b/vendor/golang.org/x/net/idna/go118.go index c5c4338dbe..712f1ad839 100644 --- a/vendor/golang.org/x/net/idna/go118.go +++ b/vendor/golang.org/x/net/idna/go118.go @@ -5,7 +5,6 @@ // license that can be found in the LICENSE file. //go:build go1.18 -// +build go1.18 package idna diff --git a/vendor/golang.org/x/net/idna/idna10.0.0.go b/vendor/golang.org/x/net/idna/idna10.0.0.go index 64ccf85feb..7b37178847 100644 --- a/vendor/golang.org/x/net/idna/idna10.0.0.go +++ b/vendor/golang.org/x/net/idna/idna10.0.0.go @@ -5,7 +5,6 @@ // license that can be found in the LICENSE file. //go:build go1.10 -// +build go1.10 // Package idna implements IDNA2008 using the compatibility processing // defined by UTS (Unicode Technical Standard) #46, which defines a standard to diff --git a/vendor/golang.org/x/net/idna/idna9.0.0.go b/vendor/golang.org/x/net/idna/idna9.0.0.go index ee1698cefb..cc6a892a4a 100644 --- a/vendor/golang.org/x/net/idna/idna9.0.0.go +++ b/vendor/golang.org/x/net/idna/idna9.0.0.go @@ -5,7 +5,6 @@ // license that can be found in the LICENSE file. //go:build !go1.10 -// +build !go1.10 // Package idna implements IDNA2008 using the compatibility processing // defined by UTS (Unicode Technical Standard) #46, which defines a standard to diff --git a/vendor/golang.org/x/net/idna/pre_go118.go b/vendor/golang.org/x/net/idna/pre_go118.go index 3aaccab1c5..40e74bb3d2 100644 --- a/vendor/golang.org/x/net/idna/pre_go118.go +++ b/vendor/golang.org/x/net/idna/pre_go118.go @@ -5,7 +5,6 @@ // license that can be found in the LICENSE file. //go:build !go1.18 -// +build !go1.18 package idna diff --git a/vendor/golang.org/x/net/idna/tables10.0.0.go b/vendor/golang.org/x/net/idna/tables10.0.0.go index d1d62ef459..c6c2bf10a6 100644 --- a/vendor/golang.org/x/net/idna/tables10.0.0.go +++ b/vendor/golang.org/x/net/idna/tables10.0.0.go @@ -1,7 +1,6 @@ // Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT. //go:build go1.10 && !go1.13 -// +build go1.10,!go1.13 package idna diff --git a/vendor/golang.org/x/net/idna/tables11.0.0.go b/vendor/golang.org/x/net/idna/tables11.0.0.go index 167efba712..76789393cc 100644 --- a/vendor/golang.org/x/net/idna/tables11.0.0.go +++ b/vendor/golang.org/x/net/idna/tables11.0.0.go @@ -1,7 +1,6 @@ // Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT. //go:build go1.13 && !go1.14 -// +build go1.13,!go1.14 package idna diff --git a/vendor/golang.org/x/net/idna/tables12.0.0.go b/vendor/golang.org/x/net/idna/tables12.0.0.go index ab40f7bcc3..0600cd2ae5 100644 --- a/vendor/golang.org/x/net/idna/tables12.0.0.go +++ b/vendor/golang.org/x/net/idna/tables12.0.0.go @@ -1,7 +1,6 @@ // Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT. //go:build go1.14 && !go1.16 -// +build go1.14,!go1.16 package idna diff --git a/vendor/golang.org/x/net/idna/tables13.0.0.go b/vendor/golang.org/x/net/idna/tables13.0.0.go index 66701eadfb..2fb768ef6d 100644 --- a/vendor/golang.org/x/net/idna/tables13.0.0.go +++ b/vendor/golang.org/x/net/idna/tables13.0.0.go @@ -1,7 +1,6 @@ // Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT. //go:build go1.16 && !go1.21 -// +build go1.16,!go1.21 package idna diff --git a/vendor/golang.org/x/net/idna/tables15.0.0.go b/vendor/golang.org/x/net/idna/tables15.0.0.go index 40033778f0..5ff05fe1af 100644 --- a/vendor/golang.org/x/net/idna/tables15.0.0.go +++ b/vendor/golang.org/x/net/idna/tables15.0.0.go @@ -1,7 +1,6 @@ // Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT. //go:build go1.21 -// +build go1.21 package idna diff --git a/vendor/golang.org/x/net/idna/tables9.0.0.go b/vendor/golang.org/x/net/idna/tables9.0.0.go index 4074b5332e..0f25e84ca2 100644 --- a/vendor/golang.org/x/net/idna/tables9.0.0.go +++ b/vendor/golang.org/x/net/idna/tables9.0.0.go @@ -1,7 +1,6 @@ // Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT. //go:build !go1.10 -// +build !go1.10 package idna diff --git a/vendor/golang.org/x/net/idna/trie12.0.0.go b/vendor/golang.org/x/net/idna/trie12.0.0.go index bb63f904b3..8a75b96673 100644 --- a/vendor/golang.org/x/net/idna/trie12.0.0.go +++ b/vendor/golang.org/x/net/idna/trie12.0.0.go @@ -5,7 +5,6 @@ // license that can be found in the LICENSE file. //go:build !go1.16 -// +build !go1.16 package idna diff --git a/vendor/golang.org/x/net/idna/trie13.0.0.go b/vendor/golang.org/x/net/idna/trie13.0.0.go index 7d68a8dc13..fa45bb9074 100644 --- a/vendor/golang.org/x/net/idna/trie13.0.0.go +++ b/vendor/golang.org/x/net/idna/trie13.0.0.go @@ -5,7 +5,6 @@ // license that can be found in the LICENSE file. //go:build go1.16 -// +build go1.16 package idna diff --git a/vendor/modules.txt b/vendor/modules.txt index be36bc62bc..2d9da5c362 100644 --- a/vendor/modules.txt +++ b/vendor/modules.txt @@ -312,8 +312,8 @@ golang.org/x/crypto/pbkdf2 # golang.org/x/mod v0.11.0 ## explicit; go 1.17 golang.org/x/mod/semver -# golang.org/x/net v0.17.0 -## explicit; go 1.17 +# golang.org/x/net v0.19.0 +## explicit; go 1.18 golang.org/x/net/http/httpguts golang.org/x/net/http2 golang.org/x/net/http2/hpack