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Diffstat (limited to 'vendor/golang.org/x/net/http2/http2.go')
| -rw-r--r-- | vendor/golang.org/x/net/http2/http2.go | 384 |
1 files changed, 0 insertions, 384 deletions
diff --git a/vendor/golang.org/x/net/http2/http2.go b/vendor/golang.org/x/net/http2/http2.go deleted file mode 100644 index bdaba1d..0000000 --- a/vendor/golang.org/x/net/http2/http2.go +++ /dev/null @@ -1,384 +0,0 @@ -// Copyright 2014 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. - -// Package http2 implements the HTTP/2 protocol. -// -// This package is low-level and intended to be used directly by very -// few people. Most users will use it indirectly through the automatic -// use by the net/http package (from Go 1.6 and later). -// For use in earlier Go versions see ConfigureServer. (Transport support -// requires Go 1.6 or later) -// -// See https://http2.github.io/ for more information on HTTP/2. -// -// See https://http2.golang.org/ for a test server running this code. -// -package http2 // import "golang.org/x/net/http2" - -import ( - "bufio" - "crypto/tls" - "errors" - "fmt" - "io" - "net/http" - "os" - "sort" - "strconv" - "strings" - "sync" - - "golang.org/x/net/http/httpguts" -) - -var ( - VerboseLogs bool - logFrameWrites bool - logFrameReads bool - inTests bool -) - -func init() { - e := os.Getenv("GODEBUG") - if strings.Contains(e, "http2debug=1") { - VerboseLogs = true - } - if strings.Contains(e, "http2debug=2") { - VerboseLogs = true - logFrameWrites = true - logFrameReads = true - } -} - -const ( - // ClientPreface is the string that must be sent by new - // connections from clients. - ClientPreface = "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n" - - // SETTINGS_MAX_FRAME_SIZE default - // http://http2.github.io/http2-spec/#rfc.section.6.5.2 - initialMaxFrameSize = 16384 - - // NextProtoTLS is the NPN/ALPN protocol negotiated during - // HTTP/2's TLS setup. - NextProtoTLS = "h2" - - // http://http2.github.io/http2-spec/#SettingValues - initialHeaderTableSize = 4096 - - initialWindowSize = 65535 // 6.9.2 Initial Flow Control Window Size - - defaultMaxReadFrameSize = 1 << 20 -) - -var ( - clientPreface = []byte(ClientPreface) -) - -type streamState int - -// HTTP/2 stream states. -// -// See http://tools.ietf.org/html/rfc7540#section-5.1. -// -// For simplicity, the server code merges "reserved (local)" into -// "half-closed (remote)". This is one less state transition to track. -// The only downside is that we send PUSH_PROMISEs slightly less -// liberally than allowable. More discussion here: -// https://lists.w3.org/Archives/Public/ietf-http-wg/2016JulSep/0599.html -// -// "reserved (remote)" is omitted since the client code does not -// support server push. -const ( - stateIdle streamState = iota - stateOpen - stateHalfClosedLocal - stateHalfClosedRemote - stateClosed -) - -var stateName = [...]string{ - stateIdle: "Idle", - stateOpen: "Open", - stateHalfClosedLocal: "HalfClosedLocal", - stateHalfClosedRemote: "HalfClosedRemote", - stateClosed: "Closed", -} - -func (st streamState) String() string { - return stateName[st] -} - -// Setting is a setting parameter: which setting it is, and its value. -type Setting struct { - // ID is which setting is being set. - // See http://http2.github.io/http2-spec/#SettingValues - ID SettingID - - // Val is the value. - Val uint32 -} - -func (s Setting) String() string { - return fmt.Sprintf("[%v = %d]", s.ID, s.Val) -} - -// Valid reports whether the setting is valid. -func (s Setting) Valid() error { - // Limits and error codes from 6.5.2 Defined SETTINGS Parameters - switch s.ID { - case SettingEnablePush: - if s.Val != 1 && s.Val != 0 { - return ConnectionError(ErrCodeProtocol) - } - case SettingInitialWindowSize: - if s.Val > 1<<31-1 { - return ConnectionError(ErrCodeFlowControl) - } - case SettingMaxFrameSize: - if s.Val < 16384 || s.Val > 1<<24-1 { - return ConnectionError(ErrCodeProtocol) - } - } - return nil -} - -// A SettingID is an HTTP/2 setting as defined in -// http://http2.github.io/http2-spec/#iana-settings -type SettingID uint16 - -const ( - SettingHeaderTableSize SettingID = 0x1 - SettingEnablePush SettingID = 0x2 - SettingMaxConcurrentStreams SettingID = 0x3 - SettingInitialWindowSize SettingID = 0x4 - SettingMaxFrameSize SettingID = 0x5 - SettingMaxHeaderListSize SettingID = 0x6 -) - -var settingName = map[SettingID]string{ - SettingHeaderTableSize: "HEADER_TABLE_SIZE", - SettingEnablePush: "ENABLE_PUSH", - SettingMaxConcurrentStreams: "MAX_CONCURRENT_STREAMS", - SettingInitialWindowSize: "INITIAL_WINDOW_SIZE", - SettingMaxFrameSize: "MAX_FRAME_SIZE", - SettingMaxHeaderListSize: "MAX_HEADER_LIST_SIZE", -} - -func (s SettingID) String() string { - if v, ok := settingName[s]; ok { - return v - } - return fmt.Sprintf("UNKNOWN_SETTING_%d", uint16(s)) -} - -var ( - errInvalidHeaderFieldName = errors.New("http2: invalid header field name") - errInvalidHeaderFieldValue = errors.New("http2: invalid header field value") -) - -// validWireHeaderFieldName reports whether v is a valid header field -// name (key). See httpguts.ValidHeaderName for the base rules. -// -// Further, http2 says: -// "Just as in HTTP/1.x, header field names are strings of ASCII -// characters that are compared in a case-insensitive -// fashion. However, header field names MUST be converted to -// lowercase prior to their encoding in HTTP/2. " -func validWireHeaderFieldName(v string) bool { - if len(v) == 0 { - return false - } - for _, r := range v { - if !httpguts.IsTokenRune(r) { - return false - } - if 'A' <= r && r <= 'Z' { - return false - } - } - return true -} - -func httpCodeString(code int) string { - switch code { - case 200: - return "200" - case 404: - return "404" - } - return strconv.Itoa(code) -} - -// from pkg io -type stringWriter interface { - WriteString(s string) (n int, err error) -} - -// A gate lets two goroutines coordinate their activities. -type gate chan struct{} - -func (g gate) Done() { g <- struct{}{} } -func (g gate) Wait() { <-g } - -// A closeWaiter is like a sync.WaitGroup but only goes 1 to 0 (open to closed). -type closeWaiter chan struct{} - -// Init makes a closeWaiter usable. -// It exists because so a closeWaiter value can be placed inside a -// larger struct and have the Mutex and Cond's memory in the same -// allocation. -func (cw *closeWaiter) Init() { - *cw = make(chan struct{}) -} - -// Close marks the closeWaiter as closed and unblocks any waiters. -func (cw closeWaiter) Close() { - close(cw) -} - -// Wait waits for the closeWaiter to become closed. -func (cw closeWaiter) Wait() { - <-cw -} - -// bufferedWriter is a buffered writer that writes to w. -// Its buffered writer is lazily allocated as needed, to minimize -// idle memory usage with many connections. -type bufferedWriter struct { - w io.Writer // immutable - bw *bufio.Writer // non-nil when data is buffered -} - -func newBufferedWriter(w io.Writer) *bufferedWriter { - return &bufferedWriter{w: w} -} - -// bufWriterPoolBufferSize is the size of bufio.Writer's -// buffers created using bufWriterPool. -// -// TODO: pick a less arbitrary value? this is a bit under -// (3 x typical 1500 byte MTU) at least. Other than that, -// not much thought went into it. -const bufWriterPoolBufferSize = 4 << 10 - -var bufWriterPool = sync.Pool{ - New: func() interface{} { - return bufio.NewWriterSize(nil, bufWriterPoolBufferSize) - }, -} - -func (w *bufferedWriter) Available() int { - if w.bw == nil { - return bufWriterPoolBufferSize - } - return w.bw.Available() -} - -func (w *bufferedWriter) Write(p []byte) (n int, err error) { - if w.bw == nil { - bw := bufWriterPool.Get().(*bufio.Writer) - bw.Reset(w.w) - w.bw = bw - } - return w.bw.Write(p) -} - -func (w *bufferedWriter) Flush() error { - bw := w.bw - if bw == nil { - return nil - } - err := bw.Flush() - bw.Reset(nil) - bufWriterPool.Put(bw) - w.bw = nil - return err -} - -func mustUint31(v int32) uint32 { - if v < 0 || v > 2147483647 { - panic("out of range") - } - return uint32(v) -} - -// bodyAllowedForStatus reports whether a given response status code -// permits a body. See RFC 7230, section 3.3. -func bodyAllowedForStatus(status int) bool { - switch { - case status >= 100 && status <= 199: - return false - case status == 204: - return false - case status == 304: - return false - } - return true -} - -type httpError struct { - msg string - timeout bool -} - -func (e *httpError) Error() string { return e.msg } -func (e *httpError) Timeout() bool { return e.timeout } -func (e *httpError) Temporary() bool { return true } - -var errTimeout error = &httpError{msg: "http2: timeout awaiting response headers", timeout: true} - -type connectionStater interface { - ConnectionState() tls.ConnectionState -} - -var sorterPool = sync.Pool{New: func() interface{} { return new(sorter) }} - -type sorter struct { - v []string // owned by sorter -} - -func (s *sorter) Len() int { return len(s.v) } -func (s *sorter) Swap(i, j int) { s.v[i], s.v[j] = s.v[j], s.v[i] } -func (s *sorter) Less(i, j int) bool { return s.v[i] < s.v[j] } - -// Keys returns the sorted keys of h. -// -// The returned slice is only valid until s used again or returned to -// its pool. -func (s *sorter) Keys(h http.Header) []string { - keys := s.v[:0] - for k := range h { - keys = append(keys, k) - } - s.v = keys - sort.Sort(s) - return keys -} - -func (s *sorter) SortStrings(ss []string) { - // Our sorter works on s.v, which sorter owns, so - // stash it away while we sort the user's buffer. - save := s.v - s.v = ss - sort.Sort(s) - s.v = save -} - -// validPseudoPath reports whether v is a valid :path pseudo-header -// value. It must be either: -// -// *) a non-empty string starting with '/' -// *) the string '*', for OPTIONS requests. -// -// For now this is only used a quick check for deciding when to clean -// up Opaque URLs before sending requests from the Transport. -// See golang.org/issue/16847 -// -// We used to enforce that the path also didn't start with "//", but -// Google's GFE accepts such paths and Chrome sends them, so ignore -// that part of the spec. See golang.org/issue/19103. -func validPseudoPath(v string) bool { - return (len(v) > 0 && v[0] == '/') || v == "*" -} |