diff options
Diffstat (limited to 'src/pkg/net/http/header.go')
-rw-r--r-- | src/pkg/net/http/header.go | 211 |
1 files changed, 0 insertions, 211 deletions
diff --git a/src/pkg/net/http/header.go b/src/pkg/net/http/header.go deleted file mode 100644 index 153b94370..000000000 --- a/src/pkg/net/http/header.go +++ /dev/null @@ -1,211 +0,0 @@ -// Copyright 2010 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 http - -import ( - "io" - "net/textproto" - "sort" - "strings" - "sync" - "time" -) - -var raceEnabled = false // set by race.go - -// A Header represents the key-value pairs in an HTTP header. -type Header map[string][]string - -// Add adds the key, value pair to the header. -// It appends to any existing values associated with key. -func (h Header) Add(key, value string) { - textproto.MIMEHeader(h).Add(key, value) -} - -// Set sets the header entries associated with key to -// the single element value. It replaces any existing -// values associated with key. -func (h Header) Set(key, value string) { - textproto.MIMEHeader(h).Set(key, value) -} - -// Get gets the first value associated with the given key. -// If there are no values associated with the key, Get returns "". -// To access multiple values of a key, access the map directly -// with CanonicalHeaderKey. -func (h Header) Get(key string) string { - return textproto.MIMEHeader(h).Get(key) -} - -// get is like Get, but key must already be in CanonicalHeaderKey form. -func (h Header) get(key string) string { - if v := h[key]; len(v) > 0 { - return v[0] - } - return "" -} - -// Del deletes the values associated with key. -func (h Header) Del(key string) { - textproto.MIMEHeader(h).Del(key) -} - -// Write writes a header in wire format. -func (h Header) Write(w io.Writer) error { - return h.WriteSubset(w, nil) -} - -func (h Header) clone() Header { - h2 := make(Header, len(h)) - for k, vv := range h { - vv2 := make([]string, len(vv)) - copy(vv2, vv) - h2[k] = vv2 - } - return h2 -} - -var timeFormats = []string{ - TimeFormat, - time.RFC850, - time.ANSIC, -} - -// ParseTime parses a time header (such as the Date: header), -// trying each of the three formats allowed by HTTP/1.1: -// TimeFormat, time.RFC850, and time.ANSIC. -func ParseTime(text string) (t time.Time, err error) { - for _, layout := range timeFormats { - t, err = time.Parse(layout, text) - if err == nil { - return - } - } - return -} - -var headerNewlineToSpace = strings.NewReplacer("\n", " ", "\r", " ") - -type writeStringer interface { - WriteString(string) (int, error) -} - -// stringWriter implements WriteString on a Writer. -type stringWriter struct { - w io.Writer -} - -func (w stringWriter) WriteString(s string) (n int, err error) { - return w.w.Write([]byte(s)) -} - -type keyValues struct { - key string - values []string -} - -// A headerSorter implements sort.Interface by sorting a []keyValues -// by key. It's used as a pointer, so it can fit in a sort.Interface -// interface value without allocation. -type headerSorter struct { - kvs []keyValues -} - -func (s *headerSorter) Len() int { return len(s.kvs) } -func (s *headerSorter) Swap(i, j int) { s.kvs[i], s.kvs[j] = s.kvs[j], s.kvs[i] } -func (s *headerSorter) Less(i, j int) bool { return s.kvs[i].key < s.kvs[j].key } - -var headerSorterPool = sync.Pool{ - New: func() interface{} { return new(headerSorter) }, -} - -// sortedKeyValues returns h's keys sorted in the returned kvs -// slice. The headerSorter used to sort is also returned, for possible -// return to headerSorterCache. -func (h Header) sortedKeyValues(exclude map[string]bool) (kvs []keyValues, hs *headerSorter) { - hs = headerSorterPool.Get().(*headerSorter) - if cap(hs.kvs) < len(h) { - hs.kvs = make([]keyValues, 0, len(h)) - } - kvs = hs.kvs[:0] - for k, vv := range h { - if !exclude[k] { - kvs = append(kvs, keyValues{k, vv}) - } - } - hs.kvs = kvs - sort.Sort(hs) - return kvs, hs -} - -// WriteSubset writes a header in wire format. -// If exclude is not nil, keys where exclude[key] == true are not written. -func (h Header) WriteSubset(w io.Writer, exclude map[string]bool) error { - ws, ok := w.(writeStringer) - if !ok { - ws = stringWriter{w} - } - kvs, sorter := h.sortedKeyValues(exclude) - for _, kv := range kvs { - for _, v := range kv.values { - v = headerNewlineToSpace.Replace(v) - v = textproto.TrimString(v) - for _, s := range []string{kv.key, ": ", v, "\r\n"} { - if _, err := ws.WriteString(s); err != nil { - return err - } - } - } - } - headerSorterPool.Put(sorter) - return nil -} - -// CanonicalHeaderKey returns the canonical format of the -// header key s. The canonicalization converts the first -// letter and any letter following a hyphen to upper case; -// the rest are converted to lowercase. For example, the -// canonical key for "accept-encoding" is "Accept-Encoding". -func CanonicalHeaderKey(s string) string { return textproto.CanonicalMIMEHeaderKey(s) } - -// hasToken reports whether token appears with v, ASCII -// case-insensitive, with space or comma boundaries. -// token must be all lowercase. -// v may contain mixed cased. -func hasToken(v, token string) bool { - if len(token) > len(v) || token == "" { - return false - } - if v == token { - return true - } - for sp := 0; sp <= len(v)-len(token); sp++ { - // Check that first character is good. - // The token is ASCII, so checking only a single byte - // is sufficient. We skip this potential starting - // position if both the first byte and its potential - // ASCII uppercase equivalent (b|0x20) don't match. - // False positives ('^' => '~') are caught by EqualFold. - if b := v[sp]; b != token[0] && b|0x20 != token[0] { - continue - } - // Check that start pos is on a valid token boundary. - if sp > 0 && !isTokenBoundary(v[sp-1]) { - continue - } - // Check that end pos is on a valid token boundary. - if endPos := sp + len(token); endPos != len(v) && !isTokenBoundary(v[endPos]) { - continue - } - if strings.EqualFold(v[sp:sp+len(token)], token) { - return true - } - } - return false -} - -func isTokenBoundary(b byte) bool { - return b == ' ' || b == ',' || b == '\t' -} |