1 line
19 KiB
JSON
1 line
19 KiB
JSON
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{"ast":null,"code":"'use strict';\n\nconst {\n tokenChars\n} = require('./validation');\n\n/**\n * Adds an offer to the map of extension offers or a parameter to the map of\n * parameters.\n *\n * @param {Object} dest The map of extension offers or parameters\n * @param {String} name The extension or parameter name\n * @param {(Object|Boolean|String)} elem The extension parameters or the\n * parameter value\n * @private\n */\nfunction push(dest, name, elem) {\n if (dest[name] === undefined) dest[name] = [elem];else dest[name].push(elem);\n}\n\n/**\n * Parses the `Sec-WebSocket-Extensions` header into an object.\n *\n * @param {String} header The field value of the header\n * @return {Object} The parsed object\n * @public\n */\nfunction parse(header) {\n const offers = Object.create(null);\n let params = Object.create(null);\n let mustUnescape = false;\n let isEscaping = false;\n let inQuotes = false;\n let extensionName;\n let paramName;\n let start = -1;\n let code = -1;\n let end = -1;\n let i = 0;\n for (; i < header.length; i++) {\n code = header.charCodeAt(i);\n if (extensionName === undefined) {\n if (end === -1 && tokenChars[code] === 1) {\n if (start === -1) start = i;\n } else if (i !== 0 && (code === 0x20 /* ' ' */ || code === 0x09) /* '\\t' */) {\n if (end === -1 && start !== -1) end = i;\n } else if (code === 0x3b /* ';' */ || code === 0x2c /* ',' */) {\n if (start === -1) {\n throw new SyntaxError(`Unexpected character at index ${i}`);\n }\n if (end === -1) end = i;\n const name = header.slice(start, end);\n if (code === 0x2c) {\n push(offers, name, params);\n params = Object.create(null);\n } else {\n extensionName = name;\n }\n start = end = -1;\n } else {\n throw new SyntaxError(`Unexpected character at index ${i}`);\n }\n } else if (paramName === undefined) {\n if (end === -1 && tokenChars[code] === 1) {\n if (start === -1) start = i;\n } else if (code === 0x20 || code === 0x09) {\n if (end === -1 && start !== -1) end = i;\n } else if (code === 0x3b || code === 0x2c) {\n if (start === -1) {\n throw new SyntaxError(`Unexpected character at index ${i}`);\n }\n if (end === -1) end = i;\n push(params, header.slice(start, end), true);\n if (code === 0x2c) {\n push(offers, extensionName, params);\n params = Object.create(null);\n extensionName = undefined;\n }\n start = end = -1;\n } else if (code === 0x3d /* '=' */ && start !== -1 && end === -1) {\n paramName = header.slice(start, i);\n start = end = -1;\n } else {\n throw new SyntaxError(`Unexpected character at index ${i}`);\n }\n } else {\n //\n // The value of a quoted-string after unescaping must conform to the\n // token ABNF, so only token characters are valid.\n // Ref: https://tools.ietf.org/html/rfc6455#section-9.1\n //\n if (isEscaping) {\n if (tokenChars[code] !== 1) {\n throw new SyntaxError(`Unexpected character at index ${i}`);\n }\n if (start === -1) start = i;else if (!mustUnescape) mustUnescape = true;\n isEscaping = false;\n } else if (inQuotes) {\n if (tokenChars[code] === 1) {\n if (start === -1) start = i;\n } else if (code === 0x22 /* '\"' */ && start !== -1) {\n inQuotes = false;\n end = i;\n } else if (code === 0x5c /* '\\' */) {\n isEscaping = true;\n } else {\n throw new SyntaxError(`Unexpected character at index ${i}`);\n }\n } else if (code === 0x22 && header.charCodeAt(i - 1) === 0x3d) {\n inQuotes = true;\n } else if (end === -1 && tokenChars[code] === 1) {\n if (start === -1) start = i;\n } else if (start !== -1 && (code === 0x20 || code === 0x09)) {\n if (end === -1) end = i;\n } else if (code === 0x3b || code === 0x2c) {\n
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