// Copyright Joyent, Inc. and other Node contributors. // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the // "Software"), to deal in the Software without restriction, including // without limitation the rights to use, copy, modify, merge, publish, // distribute, sublicense, and/or sell copies of the Software, and to permit // persons to whom the Software is furnished to do so, subject to the // following conditions: // // The above copyright notice and this permission notice shall be included // in all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE // USE OR OTHER DEALINGS IN THE SOFTWARE. // Query String Utilities 'use strict'; const { Object } = primordials; const { Buffer } = require('buffer'); const { encodeStr, hexTable, isHexTable } = require('internal/querystring'); const QueryString = module.exports = { unescapeBuffer, // `unescape()` is a JS global, so we need to use a different local name unescape: qsUnescape, // `escape()` is a JS global, so we need to use a different local name escape: qsEscape, stringify, encode: stringify, parse, decode: parse }; const unhexTable = [ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 0 - 15 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 16 - 31 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 32 - 47 +0, +1, +2, +3, +4, +5, +6, +7, +8, +9, -1, -1, -1, -1, -1, -1, // 48 - 63 -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 64 - 79 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 80 - 95 -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 96 - 111 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 112 - 127 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 128 ... -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 // ... 255 ]; // A safe fast alternative to decodeURIComponent function unescapeBuffer(s, decodeSpaces) { const out = Buffer.allocUnsafe(s.length); var index = 0; var outIndex = 0; var currentChar; var nextChar; var hexHigh; var hexLow; const maxLength = s.length - 2; // Flag to know if some hex chars have been decoded var hasHex = false; while (index < s.length) { currentChar = s.charCodeAt(index); if (currentChar === 43 /* '+' */ && decodeSpaces) { out[outIndex++] = 32; // ' ' index++; continue; } if (currentChar === 37 /* '%' */ && index < maxLength) { currentChar = s.charCodeAt(++index); hexHigh = unhexTable[currentChar]; if (!(hexHigh >= 0)) { out[outIndex++] = 37; // '%' } else { nextChar = s.charCodeAt(++index); hexLow = unhexTable[nextChar]; if (!(hexLow >= 0)) { out[outIndex++] = 37; // '%' out[outIndex++] = currentChar; currentChar = nextChar; } else { hasHex = true; currentChar = hexHigh * 16 + hexLow; } } } out[outIndex++] = currentChar; index++; } return hasHex ? out.slice(0, outIndex) : out; } function qsUnescape(s, decodeSpaces) { try { return decodeURIComponent(s); } catch { return QueryString.unescapeBuffer(s, decodeSpaces).toString(); } } // These characters do not need escaping when generating query strings: // ! - . _ ~ // ' ( ) * // digits // alpha (uppercase) // alpha (lowercase) const noEscape = [ 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, 0, 0, 0, 0, 1, 1, 1, 1, 0, 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, 0, 1, // 80 - 95 0, 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, 0, 0, 1, 0 // 112 - 127 ]; // QueryString.escape() replaces encodeURIComponent() // http://www.ecma-international.org/ecma-262/5.1/#sec-15.1.3.4 function qsEscape(str) { if (typeof str !== 'string') { if (typeof str === 'object') str = String(str); else str += ''; } return encodeStr(str, noEscape, hexTable); } function stringifyPrimitive(v) { if (typeof v === 'string') return v; if (typeof v === 'number' && isFinite(v)) return '' + v; if (typeof v === 'boolean') return v ? 'true' : 'false'; return ''; } function stringify(obj, sep, eq, options) { sep = sep || '&'; eq = eq || '='; var encode = QueryString.escape; if (options && typeof options.encodeURIComponent === 'function') { encode = options.encodeURIComponent; } if (obj !== null && typeof obj === 'object') { var keys = Object.keys(obj); var len = keys.length; var flast = len - 1; var fields = ''; for (var i = 0; i < len; ++i) { var k = keys[i]; var v = obj[k]; var ks = encode(stringifyPrimitive(k)); ks += eq; if (Array.isArray(v)) { var vlen = v.length; if (vlen === 0) continue; var vlast = vlen - 1; for (var j = 0; j < vlen; ++j) { fields += ks; fields += encode(stringifyPrimitive(v[j])); if (j < vlast) fields += sep; } } else { fields += ks; fields += encode(stringifyPrimitive(v)); } if (i < flast) fields += sep; } return fields; } return ''; } function charCodes(str) { if (str.length === 0) return []; if (str.length === 1) return [str.charCodeAt(0)]; const ret = new Array(str.length); for (var i = 0; i < str.length; ++i) ret[i] = str.charCodeAt(i); return ret; } const defSepCodes = [38]; // & const defEqCodes = [61]; // = function addKeyVal(obj, key, value, keyEncoded, valEncoded, decode) { if (key.length > 0 && keyEncoded) key = decodeStr(key, decode); if (value.length > 0 && valEncoded) value = decodeStr(value, decode); if (obj[key] === undefined) { obj[key] = value; } else { const curValue = obj[key]; // A simple Array-specific property check is enough here to // distinguish from a string value and is faster and still safe // since we are generating all of the values being assigned. if (curValue.pop) curValue[curValue.length] = value; else obj[key] = [curValue, value]; } } // Parse a key/val string. function parse(qs, sep, eq, options) { const obj = Object.create(null); if (typeof qs !== 'string' || qs.length === 0) { return obj; } const sepCodes = (!sep ? defSepCodes : charCodes(sep + '')); const eqCodes = (!eq ? defEqCodes : charCodes(eq + '')); const sepLen = sepCodes.length; const eqLen = eqCodes.length; var pairs = 1000; if (options && typeof options.maxKeys === 'number') { // -1 is used in place of a value like Infinity for meaning // "unlimited pairs" because of additional checks V8 (at least as of v5.4) // has to do when using variables that contain values like Infinity. Since // `pairs` is always decremented and checked explicitly for 0, -1 works // effectively the same as Infinity, while providing a significant // performance boost. pairs = (options.maxKeys > 0 ? options.maxKeys : -1); } var decode = QueryString.unescape; if (options && typeof options.decodeURIComponent === 'function') { decode = options.decodeURIComponent; } const customDecode = (decode !== qsUnescape); var lastPos = 0; var sepIdx = 0; var eqIdx = 0; var key = ''; var value = ''; var keyEncoded = customDecode; var valEncoded = customDecode; const plusChar = (customDecode ? '%20' : ' '); var encodeCheck = 0; for (var i = 0; i < qs.length; ++i) { const code = qs.charCodeAt(i); // Try matching key/value pair separator (e.g. '&') if (code === sepCodes[sepIdx]) { if (++sepIdx === sepLen) { // Key/value pair separator match! const end = i - sepIdx + 1; if (eqIdx < eqLen) { // We didn't find the (entire) key/value separator if (lastPos < end) { // Treat the substring as part of the key instead of the value key += qs.slice(lastPos, end); } else if (key.length === 0) { // We saw an empty substring between separators if (--pairs === 0) return obj; lastPos = i + 1; sepIdx = eqIdx = 0; continue; } } else if (lastPos < end) { value += qs.slice(lastPos, end); } addKeyVal(obj, key, value, keyEncoded, valEncoded, decode); if (--pairs === 0) return obj; keyEncoded = valEncoded = customDecode; key = value = ''; encodeCheck = 0; lastPos = i + 1; sepIdx = eqIdx = 0; } } else { sepIdx = 0; // Try matching key/value separator (e.g. '=') if we haven't already if (eqIdx < eqLen) { if (code === eqCodes[eqIdx]) { if (++eqIdx === eqLen) { // Key/value separator match! const end = i - eqIdx + 1; if (lastPos < end) key += qs.slice(lastPos, end); encodeCheck = 0; lastPos = i + 1; } continue; } else { eqIdx = 0; if (!keyEncoded) { // Try to match an (valid) encoded byte once to minimize unnecessary // calls to string decoding functions if (code === 37/* % */) { encodeCheck = 1; continue; } else if (encodeCheck > 0) { if (isHexTable[code] === 1) { if (++encodeCheck === 3) keyEncoded = true; continue; } else { encodeCheck = 0; } } } } if (code === 43/* + */) { if (lastPos < i) key += qs.slice(lastPos, i); key += plusChar; lastPos = i + 1; continue; } } if (code === 43/* + */) { if (lastPos < i) value += qs.slice(lastPos, i); value += plusChar; lastPos = i + 1; } else if (!valEncoded) { // Try to match an (valid) encoded byte (once) to minimize unnecessary // calls to string decoding functions if (code === 37/* % */) { encodeCheck = 1; } else if (encodeCheck > 0) { if (isHexTable[code] === 1) { if (++encodeCheck === 3) valEncoded = true; } else { encodeCheck = 0; } } } } } // Deal with any leftover key or value data if (lastPos < qs.length) { if (eqIdx < eqLen) key += qs.slice(lastPos); else if (sepIdx < sepLen) value += qs.slice(lastPos); } else if (eqIdx === 0 && key.length === 0) { // We ended on an empty substring return obj; } addKeyVal(obj, key, value, keyEncoded, valEncoded, decode); return obj; } // v8 does not optimize functions with try-catch blocks, so we isolate them here // to minimize the damage (Note: no longer true as of V8 5.4 -- but still will // not be inlined). function decodeStr(s, decoder) { try { return decoder(s); } catch { return QueryString.unescape(s, true); } }