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Diffstat (limited to 'client/node_modules/ws/lib/extension.js')
| -rw-r--r-- | client/node_modules/ws/lib/extension.js | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/client/node_modules/ws/lib/extension.js b/client/node_modules/ws/lib/extension.js deleted file mode 100644 index 3d7895c..0000000 --- a/client/node_modules/ws/lib/extension.js +++ /dev/null @@ -1,203 +0,0 @@ -'use strict'; - -const { tokenChars } = require('./validation'); - -/** - * 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 (dest[name] === undefined) dest[name] = [elem]; - else dest[name].push(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 = Object.create(null); - let params = Object.create(null); - let mustUnescape = false; - let isEscaping = false; - let inQuotes = false; - let extensionName; - let paramName; - let start = -1; - let code = -1; - let end = -1; - let i = 0; - - for (; i < header.length; i++) { - code = header.charCodeAt(i); - - if (extensionName === undefined) { - if (end === -1 && tokenChars[code] === 1) { - if (start === -1) start = i; - } else if ( - i !== 0 && - (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 = Object.create(null); - } 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 = Object.create(null); - 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; - let 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 = Object.create(null); - extensionName = undefined; - } - - paramName = undefined; - start = end = -1; - } else { - throw new SyntaxError(`Unexpected character at index ${i}`); - } - } - } - - if (start === -1 || inQuotes || code === 0x20 || code === 0x09) { - throw new SyntaxError('Unexpected end of input'); - } - - if (end === -1) end = i; - const token = header.slice(start, end); - if (extensionName === undefined) { - push(offers, token, params); - } else { - if (paramName === undefined) { - push(params, token, true); - } else if (mustUnescape) { - push(params, paramName, token.replace(/\\/g, '')); - } else { - push(params, paramName, token); - } - push(offers, extensionName, params); - } - - return offers; -} - -/** - * Builds the `Sec-WebSocket-Extensions` header field value. - * - * @param {Object} extensions The map of extensions and parameters to format - * @return {String} A string representing the given object - * @public - */ -function format(extensions) { - return Object.keys(extensions) - .map((extension) => { - let configurations = extensions[extension]; - if (!Array.isArray(configurations)) configurations = [configurations]; - return configurations - .map((params) => { - return [extension] - .concat( - Object.keys(params).map((k) => { - let values = params[k]; - if (!Array.isArray(values)) values = [values]; - return values - .map((v) => (v === true ? k : `${k}=${v}`)) - .join('; '); - }) - ) - .join('; '); - }) - .join(', '); - }) - .join(', '); -} - -module.exports = { format, parse }; |