| 'use strict'; |
| |
| var utils = require('./utils'); |
| |
| var has = Object.prototype.hasOwnProperty; |
| |
| var defaults = { |
| allowDots: false, |
| allowPrototypes: false, |
| arrayLimit: 20, |
| decoder: utils.decode, |
| delimiter: '&', |
| depth: 5, |
| parameterLimit: 1000, |
| plainObjects: false, |
| strictNullHandling: false |
| }; |
| |
| var parseValues = function parseQueryStringValues(str, options) { |
| var obj = {}; |
| var cleanStr = options.ignoreQueryPrefix ? str.replace(/^\?/, '') : str; |
| var limit = options.parameterLimit === Infinity ? undefined : options.parameterLimit; |
| var parts = cleanStr.split(options.delimiter, limit); |
| |
| for (var i = 0; i < parts.length; ++i) { |
| var part = parts[i]; |
| |
| var bracketEqualsPos = part.indexOf(']='); |
| var pos = bracketEqualsPos === -1 ? part.indexOf('=') : bracketEqualsPos + 1; |
| |
| var key, val; |
| if (pos === -1) { |
| key = options.decoder(part, defaults.decoder); |
| val = options.strictNullHandling ? null : ''; |
| } else { |
| key = options.decoder(part.slice(0, pos), defaults.decoder); |
| val = options.decoder(part.slice(pos + 1), defaults.decoder); |
| } |
| if (has.call(obj, key)) { |
| obj[key] = [].concat(obj[key]).concat(val); |
| } else { |
| obj[key] = val; |
| } |
| } |
| |
| return obj; |
| }; |
| |
| var parseObject = function (chain, val, options) { |
| var leaf = val; |
| |
| for (var i = chain.length - 1; i >= 0; --i) { |
| var obj; |
| var root = chain[i]; |
| |
| if (root === '[]') { |
| obj = []; |
| obj = obj.concat(leaf); |
| } else { |
| obj = options.plainObjects ? Object.create(null) : {}; |
| var cleanRoot = root.charAt(0) === '[' && root.charAt(root.length - 1) === ']' ? root.slice(1, -1) : root; |
| var index = parseInt(cleanRoot, 10); |
| if ( |
| !isNaN(index) |
| && root !== cleanRoot |
| && String(index) === cleanRoot |
| && index >= 0 |
| && (options.parseArrays && index <= options.arrayLimit) |
| ) { |
| obj = []; |
| obj[index] = leaf; |
| } else { |
| obj[cleanRoot] = leaf; |
| } |
| } |
| |
| leaf = obj; |
| } |
| |
| return leaf; |
| }; |
| |
| var parseKeys = function parseQueryStringKeys(givenKey, val, options) { |
| if (!givenKey) { |
| return; |
| } |
| |
| // Transform dot notation to bracket notation |
| var key = options.allowDots ? givenKey.replace(/\.([^.[]+)/g, '[$1]') : givenKey; |
| |
| // The regex chunks |
| |
| var brackets = /(\[[^[\]]*])/; |
| var child = /(\[[^[\]]*])/g; |
| |
| // Get the parent |
| |
| var segment = brackets.exec(key); |
| var parent = segment ? key.slice(0, segment.index) : key; |
| |
| // Stash the parent if it exists |
| |
| var keys = []; |
| if (parent) { |
| // If we aren't using plain objects, optionally prefix keys |
| // that would overwrite object prototype properties |
| if (!options.plainObjects && has.call(Object.prototype, parent)) { |
| if (!options.allowPrototypes) { |
| return; |
| } |
| } |
| |
| keys.push(parent); |
| } |
| |
| // Loop through children appending to the array until we hit depth |
| |
| var i = 0; |
| while ((segment = child.exec(key)) !== null && i < options.depth) { |
| i += 1; |
| if (!options.plainObjects && has.call(Object.prototype, segment[1].slice(1, -1))) { |
| if (!options.allowPrototypes) { |
| return; |
| } |
| } |
| keys.push(segment[1]); |
| } |
| |
| // If there's a remainder, just add whatever is left |
| |
| if (segment) { |
| keys.push('[' + key.slice(segment.index) + ']'); |
| } |
| |
| return parseObject(keys, val, options); |
| }; |
| |
| module.exports = function (str, opts) { |
| var options = opts ? utils.assign({}, opts) : {}; |
| |
| if (options.decoder !== null && options.decoder !== undefined && typeof options.decoder !== 'function') { |
| throw new TypeError('Decoder has to be a function.'); |
| } |
| |
| options.ignoreQueryPrefix = options.ignoreQueryPrefix === true; |
| options.delimiter = typeof options.delimiter === 'string' || utils.isRegExp(options.delimiter) ? options.delimiter : defaults.delimiter; |
| options.depth = typeof options.depth === 'number' ? options.depth : defaults.depth; |
| options.arrayLimit = typeof options.arrayLimit === 'number' ? options.arrayLimit : defaults.arrayLimit; |
| options.parseArrays = options.parseArrays !== false; |
| options.decoder = typeof options.decoder === 'function' ? options.decoder : defaults.decoder; |
| options.allowDots = typeof options.allowDots === 'boolean' ? options.allowDots : defaults.allowDots; |
| options.plainObjects = typeof options.plainObjects === 'boolean' ? options.plainObjects : defaults.plainObjects; |
| options.allowPrototypes = typeof options.allowPrototypes === 'boolean' ? options.allowPrototypes : defaults.allowPrototypes; |
| options.parameterLimit = typeof options.parameterLimit === 'number' ? options.parameterLimit : defaults.parameterLimit; |
| options.strictNullHandling = typeof options.strictNullHandling === 'boolean' ? options.strictNullHandling : defaults.strictNullHandling; |
| |
| if (str === '' || str === null || typeof str === 'undefined') { |
| return options.plainObjects ? Object.create(null) : {}; |
| } |
| |
| var tempObj = typeof str === 'string' ? parseValues(str, options) : str; |
| var obj = options.plainObjects ? Object.create(null) : {}; |
| |
| // Iterate over the keys and setup the new object |
| |
| var keys = Object.keys(tempObj); |
| for (var i = 0; i < keys.length; ++i) { |
| var key = keys[i]; |
| var newObj = parseKeys(key, tempObj[key], options); |
| obj = utils.merge(obj, newObj, options); |
| } |
| |
| return utils.compact(obj); |
| }; |