+++ /dev/null
-'use strict';
-
-//
-// Allowed token characters:
-//
-// '!', '#', '$', '%', '&', ''', '*', '+', '-',
-// '.', 0-9, A-Z, '^', '_', '`', a-z, '|', '~'
-//
-// tokenChars[32] === 0 // ' '
-// tokenChars[33] === 1 // '!'
-// tokenChars[34] === 0 // '"'
-// ...
-//
-const tokenChars = [
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0 - 15
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16 - 31
- 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, // 32 - 47
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, // 48 - 63
- 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 64 - 79
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, // 80 - 95
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 96 - 111
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0 // 112 - 127
-];
-
-/**
- * Adds an offer to the map of extension offers or a parameter to the map of
- * parameters.
- *
- * @param {Object} dest The map of extension offers or parameters
- * @param {String} name The extension or parameter name
- * @param {(Object|Boolean|String)} elem The extension parameters or the
- * parameter value
- * @private
- */
-function push (dest, name, elem) {
- if (Object.prototype.hasOwnProperty.call(dest, name)) dest[name].push(elem);
- else dest[name] = [elem];
-}
-
-/**
- * Parses the `Sec-WebSocket-Extensions` header into an object.
- *
- * @param {String} header The field value of the header
- * @return {Object} The parsed object
- * @public
- */
-function parse (header) {
- const offers = {};
-
- if (header === undefined || header === '') return offers;
-
- var params = {};
- var mustUnescape = false;
- var isEscaping = false;
- var inQuotes = false;
- var extensionName;
- var paramName;
- var start = -1;
- var end = -1;
-
- for (var i = 0; i < header.length; i++) {
- const code = header.charCodeAt(i);
-
- if (extensionName === undefined) {
- if (end === -1 && tokenChars[code] === 1) {
- if (start === -1) start = i;
- } else if (code === 0x20/* ' ' */|| code === 0x09/* '\t' */) {
- if (end === -1 && start !== -1) end = i;
- } else if (code === 0x3b/* ';' */ || code === 0x2c/* ',' */) {
- if (start === -1) {
- throw new SyntaxError(`Unexpected character at index ${i}`);
- }
-
- if (end === -1) end = i;
- const name = header.slice(start, end);
- if (code === 0x2c) {
- push(offers, name, params);
- params = {};
- } else {
- extensionName = name;
- }
-
- start = end = -1;
- } else {
- throw new SyntaxError(`Unexpected character at index ${i}`);
- }
- } else if (paramName === undefined) {
- if (end === -1 && tokenChars[code] === 1) {
- if (start === -1) start = i;
- } else if (code === 0x20 || code === 0x09) {
- if (end === -1 && start !== -1) end = i;
- } else if (code === 0x3b || code === 0x2c) {
- if (start === -1) {
- throw new SyntaxError(`Unexpected character at index ${i}`);
- }
-
- if (end === -1) end = i;
- push(params, header.slice(start, end), true);
- if (code === 0x2c) {
- push(offers, extensionName, params);
- params = {};
- extensionName = undefined;
- }
-
- start = end = -1;
- } else if (code === 0x3d/* '=' */&& start !== -1 && end === -1) {
- paramName = header.slice(start, i);
- start = end = -1;
- } else {
- throw new SyntaxError(`Unexpected character at index ${i}`);
- }
- } else {
- //
- // The value of a quoted-string after unescaping must conform to the
- // token ABNF, so only token characters are valid.
- // Ref: https://tools.ietf.org/html/rfc6455#section-9.1
- //
- if (isEscaping) {
- if (tokenChars[code] !== 1) {
- throw new SyntaxError(`Unexpected character at index ${i}`);
- }
- if (start === -1) start = i;
- else if (!mustUnescape) mustUnescape = true;
- isEscaping = false;
- } else if (inQuotes) {
- if (tokenChars[code] === 1) {
- if (start === -1) start = i;
- } else if (code === 0x22/* '"' */ && start !== -1) {
- inQuotes = false;
- end = i;
- } else if (code === 0x5c/* '\' */) {
- isEscaping = true;
- } else {
- throw new SyntaxError(`Unexpected character at index ${i}`);
- }
- } else if (code === 0x22 && header.charCodeAt(i - 1) === 0x3d) {
- inQuotes = true;
- } else if (end === -1 && tokenChars[code] === 1) {
- if (start === -1) start = i;
- } else if (start !== -1 && (code === 0x20 || code === 0x09)) {
- if (end === -1) end = i;
- } else if (code === 0x3b || code === 0x2c) {
- if (start === -1) {
- throw new SyntaxError(`Unexpected character at index ${i}`);
- }
-
- if (end === -1) end = i;
- var value = header.slice(start, end);
- if (mustUnescape) {
- value = value.replace(/\\/g, '');
- mustUnescape = false;
- }
- push(params, paramName, value);
- if (code === 0x2c) {
- push(offers, extensionName, params);
- params = {};
- extensionName = undefined;
- }
-
- paramName = undefined;
- start = end = -1;
- } else {
- throw new SyntaxError(`Unexpected character at index ${i}`);
- }
- }
- }
-
- if (start === -1 || inQuotes) {
- throw new SyntaxError('Unexpected end of input');
- }
-
- if (end === -1) end = i;
- const token = header.slice(start, end);
- if (extensionName === undefined) {
- push(offers, token, {});
- } else {
- if (paramName === undefined) {
- push(params, token, true);
- } else if (mustUnescape) {
- push(params, paramName, token.replace(/\\/g, ''));
- } else {
- push(params, paramName, token);
- }
- push(offers, extensionName, params);
- }
-
- return offers;
-}
-
-/**
- * Builds the `Sec-WebSocket-Extensions` header field value.
- *
- * @param {Object} extensions The map of extensions and parameters to format
- * @return {String} A string representing the given object
- * @public
- */
-function format (extensions) {
- return Object.keys(extensions).map((extension) => {
- var configurations = extensions[extension];
- if (!Array.isArray(configurations)) configurations = [configurations];
- return configurations.map((params) => {
- return [extension].concat(Object.keys(params).map((k) => {
- var values = params[k];
- if (!Array.isArray(values)) values = [values];
- return values.map((v) => v === true ? k : `${k}=${v}`).join('; ');
- })).join('; ');
- }).join(', ');
- }).join(', ');
-}
-
-module.exports = { format, parse };
projects / VSoRC / .git / blobdiff