diff options
Diffstat (limited to 'internal/httputil/header/header.go')
| -rw-r--r-- | internal/httputil/header/header.go | 298 |
1 files changed, 0 insertions, 298 deletions
diff --git a/internal/httputil/header/header.go b/internal/httputil/header/header.go deleted file mode 100644 index 0f1572e3..00000000 --- a/internal/httputil/header/header.go +++ /dev/null @@ -1,298 +0,0 @@ -// Copyright 2013 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 or at -// https://developers.google.com/open-source/licenses/bsd. - -// Package header provides functions for parsing HTTP headers. -package header - -import ( - "net/http" - "strings" - "time" -) - -// Octet types from RFC 2616. -var octetTypes [256]octetType - -type octetType byte - -const ( - isToken octetType = 1 << iota - isSpace -) - -func init() { - // OCTET = <any 8-bit sequence of data> - // CHAR = <any US-ASCII character (octets 0 - 127)> - // CTL = <any US-ASCII control character (octets 0 - 31) and DEL (127)> - // CR = <US-ASCII CR, carriage return (13)> - // LF = <US-ASCII LF, linefeed (10)> - // SP = <US-ASCII SP, space (32)> - // HT = <US-ASCII HT, horizontal-tab (9)> - // <"> = <US-ASCII double-quote mark (34)> - // CRLF = CR LF - // LWS = [CRLF] 1*( SP | HT ) - // TEXT = <any OCTET except CTLs, but including LWS> - // separators = "(" | ")" | "<" | ">" | "@" | "," | ";" | ":" | "\" | <"> - // | "/" | "[" | "]" | "?" | "=" | "{" | "}" | SP | HT - // token = 1*<any CHAR except CTLs or separators> - // qdtext = <any TEXT except <">> - - for c := 0; c < 256; c++ { - var t octetType - isCtl := c <= 31 || c == 127 - isChar := 0 <= c && c <= 127 - isSeparator := strings.IndexRune(" \t\"(),/:;<=>?@[]\\{}", rune(c)) >= 0 - if strings.IndexRune(" \t\r\n", rune(c)) >= 0 { - t |= isSpace - } - if isChar && !isCtl && !isSeparator { - t |= isToken - } - octetTypes[c] = t - } -} - -// Copy returns a shallow copy of the header. -func Copy(header http.Header) http.Header { - h := make(http.Header) - for k, vs := range header { - h[k] = vs - } - return h -} - -var timeLayouts = []string{"Mon, 02 Jan 2006 15:04:05 GMT", time.RFC850, time.ANSIC} - -// ParseTime parses the header as time. The zero value is returned if the -// header is not present or there is an error parsing the -// header. -func ParseTime(header http.Header, key string) time.Time { - if s := header.Get(key); s != "" { - for _, layout := range timeLayouts { - if t, err := time.Parse(layout, s); err == nil { - return t.UTC() - } - } - } - return time.Time{} -} - -// ParseList parses a comma separated list of values. Commas are ignored in -// quoted strings. Quoted values are not unescaped or unquoted. Whitespace is -// trimmed. -func ParseList(header http.Header, key string) []string { - var result []string - for _, s := range header[http.CanonicalHeaderKey(key)] { - begin := 0 - end := 0 - escape := false - quote := false - for i := 0; i < len(s); i++ { - b := s[i] - switch { - case escape: - escape = false - end = i + 1 - case quote: - switch b { - case '\\': - escape = true - case '"': - quote = false - } - end = i + 1 - case b == '"': - quote = true - end = i + 1 - case octetTypes[b]&isSpace != 0: - if begin == end { - begin = i + 1 - end = begin - } - case b == ',': - if begin < end { - result = append(result, s[begin:end]) - } - begin = i + 1 - end = begin - default: - end = i + 1 - } - } - if begin < end { - result = append(result, s[begin:end]) - } - } - return result -} - -// ParseValueAndParams parses a comma separated list of values with optional -// semicolon separated name-value pairs. Content-Type and Content-Disposition -// headers are in this format. -func ParseValueAndParams(header http.Header, key string) (value string, params map[string]string) { - params = make(map[string]string) - s := header.Get(key) - value, s = expectTokenSlash(s) - if value == "" { - return - } - value = strings.ToLower(value) - s = skipSpace(s) - for strings.HasPrefix(s, ";") { - var pkey string - pkey, s = expectToken(skipSpace(s[1:])) - if pkey == "" { - return - } - if !strings.HasPrefix(s, "=") { - return - } - var pvalue string - pvalue, s = expectTokenOrQuoted(s[1:]) - if pvalue == "" { - return - } - pkey = strings.ToLower(pkey) - params[pkey] = pvalue - s = skipSpace(s) - } - return -} - -// AcceptSpec describes an Accept* header. -type AcceptSpec struct { - Value string - Q float64 -} - -// ParseAccept parses Accept* headers. -func ParseAccept(header http.Header, key string) (specs []AcceptSpec) { -loop: - for _, s := range header[key] { - for { - var spec AcceptSpec - spec.Value, s = expectTokenSlash(s) - if spec.Value == "" { - continue loop - } - spec.Q = 1.0 - s = skipSpace(s) - if strings.HasPrefix(s, ";") { - s = skipSpace(s[1:]) - if !strings.HasPrefix(s, "q=") { - continue loop - } - spec.Q, s = expectQuality(s[2:]) - if spec.Q < 0.0 { - continue loop - } - } - specs = append(specs, spec) - s = skipSpace(s) - if !strings.HasPrefix(s, ",") { - continue loop - } - s = skipSpace(s[1:]) - } - } - return -} - -func skipSpace(s string) (rest string) { - i := 0 - for ; i < len(s); i++ { - if octetTypes[s[i]]&isSpace == 0 { - break - } - } - return s[i:] -} - -func expectToken(s string) (token, rest string) { - i := 0 - for ; i < len(s); i++ { - if octetTypes[s[i]]&isToken == 0 { - break - } - } - return s[:i], s[i:] -} - -func expectTokenSlash(s string) (token, rest string) { - i := 0 - for ; i < len(s); i++ { - b := s[i] - if (octetTypes[b]&isToken == 0) && b != '/' { - break - } - } - return s[:i], s[i:] -} - -func expectQuality(s string) (q float64, rest string) { - switch { - case len(s) == 0: - return -1, "" - case s[0] == '0': - q = 0 - case s[0] == '1': - q = 1 - default: - return -1, "" - } - s = s[1:] - if !strings.HasPrefix(s, ".") { - return q, s - } - s = s[1:] - i := 0 - n := 0 - d := 1 - for ; i < len(s); i++ { - b := s[i] - if b < '0' || b > '9' { - break - } - n = n*10 + int(b) - '0' - d *= 10 - } - return q + float64(n)/float64(d), s[i:] -} - -func expectTokenOrQuoted(s string) (value string, rest string) { - if !strings.HasPrefix(s, "\"") { - return expectToken(s) - } - s = s[1:] - for i := 0; i < len(s); i++ { - switch s[i] { - case '"': - return s[:i], s[i+1:] - case '\\': - p := make([]byte, len(s)-1) - j := copy(p, s[:i]) - escape := true - for i = i + 1; i < len(s); i++ { - b := s[i] - switch { - case escape: - escape = false - p[j] = b - j++ - case b == '\\': - escape = true - case b == '"': - return string(p[:j]), s[i+1:] - default: - p[j] = b - j++ - } - } - return "", "" - } - } - return "", "" -} |