diff options
Diffstat (limited to 'vendor/github.com/gorilla/websocket/util.go')
-rw-r--r-- | vendor/github.com/gorilla/websocket/util.go | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/vendor/github.com/gorilla/websocket/util.go b/vendor/github.com/gorilla/websocket/util.go deleted file mode 100644 index 9a4908df..00000000 --- a/vendor/github.com/gorilla/websocket/util.go +++ /dev/null @@ -1,214 +0,0 @@ -// Copyright 2013 The Gorilla WebSocket 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 websocket - -import ( - "crypto/rand" - "crypto/sha1" - "encoding/base64" - "io" - "net/http" - "strings" -) - -var keyGUID = []byte("258EAFA5-E914-47DA-95CA-C5AB0DC85B11") - -func computeAcceptKey(challengeKey string) string { - h := sha1.New() - h.Write([]byte(challengeKey)) - h.Write(keyGUID) - return base64.StdEncoding.EncodeToString(h.Sum(nil)) -} - -func generateChallengeKey() (string, error) { - p := make([]byte, 16) - if _, err := io.ReadFull(rand.Reader, p); err != nil { - return "", err - } - return base64.StdEncoding.EncodeToString(p), nil -} - -// Octet types from RFC 2616. -var octetTypes [256]byte - -const ( - isTokenOctet = 1 << iota - isSpaceOctet -) - -func init() { - // From RFC 2616 - // - // 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 byte - 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 |= isSpaceOctet - } - if isChar && !isCtl && !isSeparator { - t |= isTokenOctet - } - octetTypes[c] = t - } -} - -func skipSpace(s string) (rest string) { - i := 0 - for ; i < len(s); i++ { - if octetTypes[s[i]]&isSpaceOctet == 0 { - break - } - } - return s[i:] -} - -func nextToken(s string) (token, rest string) { - i := 0 - for ; i < len(s); i++ { - if octetTypes[s[i]]&isTokenOctet == 0 { - break - } - } - return s[:i], s[i:] -} - -func nextTokenOrQuoted(s string) (value string, rest string) { - if !strings.HasPrefix(s, "\"") { - return nextToken(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 += 1 - case b == '\\': - escape = true - case b == '"': - return string(p[:j]), s[i+1:] - default: - p[j] = b - j += 1 - } - } - return "", "" - } - } - return "", "" -} - -// tokenListContainsValue returns true if the 1#token header with the given -// name contains token. -func tokenListContainsValue(header http.Header, name string, value string) bool { -headers: - for _, s := range header[name] { - for { - var t string - t, s = nextToken(skipSpace(s)) - if t == "" { - continue headers - } - s = skipSpace(s) - if s != "" && s[0] != ',' { - continue headers - } - if strings.EqualFold(t, value) { - return true - } - if s == "" { - continue headers - } - s = s[1:] - } - } - return false -} - -// parseExtensiosn parses WebSocket extensions from a header. -func parseExtensions(header http.Header) []map[string]string { - - // From RFC 6455: - // - // Sec-WebSocket-Extensions = extension-list - // extension-list = 1#extension - // extension = extension-token *( ";" extension-param ) - // extension-token = registered-token - // registered-token = token - // extension-param = token [ "=" (token | quoted-string) ] - // ;When using the quoted-string syntax variant, the value - // ;after quoted-string unescaping MUST conform to the - // ;'token' ABNF. - - var result []map[string]string -headers: - for _, s := range header["Sec-Websocket-Extensions"] { - for { - var t string - t, s = nextToken(skipSpace(s)) - if t == "" { - continue headers - } - ext := map[string]string{"": t} - for { - s = skipSpace(s) - if !strings.HasPrefix(s, ";") { - break - } - var k string - k, s = nextToken(skipSpace(s[1:])) - if k == "" { - continue headers - } - s = skipSpace(s) - var v string - if strings.HasPrefix(s, "=") { - v, s = nextTokenOrQuoted(skipSpace(s[1:])) - s = skipSpace(s) - } - if s != "" && s[0] != ',' && s[0] != ';' { - continue headers - } - ext[k] = v - } - if s != "" && s[0] != ',' { - continue headers - } - result = append(result, ext) - if s == "" { - continue headers - } - s = s[1:] - } - } - return result -} |