123 lines
2.6 KiB
JavaScript
123 lines
2.6 KiB
JavaScript
/**
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* Adapted version of Node.js' `querystring` module.
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* @module querystring
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* @see http://nodejs.org/api/querystring.html
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* @see https://github.com/joyent/node/blob/f105f2f2/lib/querystring.js
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* @license MIT
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*/
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var QueryString = exports;
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// If obj.hasOwnProperty has been overridden, then calling
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// obj.hasOwnProperty(prop) will break.
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// See: https://github.com/joyent/node/issues/1707
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function hasOwnProp(obj, prop) {
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return Object.prototype.hasOwnProperty.call(obj, prop);
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}
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QueryString.unescape = function(s) {
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return decodeURIComponent(s);
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};
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QueryString.escape = function(str) {
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return encodeURIComponent(str);
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};
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var stringifyPrimitive = function(v) {
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switch (typeof v) {
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case 'string':
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return v;
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case 'boolean':
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return v ? 'true' : 'false';
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case 'number':
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return isFinite(v) ? v : '';
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default:
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return '';
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}
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};
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QueryString.stringify = QueryString.encode = function(obj, sep, eq, name) {
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sep = sep || '&';
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eq = eq || '=';
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if (obj === null) {
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obj = undefined;
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}
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if (typeof obj === 'object') {
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return Object.keys(obj).map(function(k) {
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var ks = QueryString.escape(stringifyPrimitive(k)) + eq;
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if (Array.isArray(obj[k])) {
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return obj[k].map(function(v) {
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return ks + QueryString.escape(stringifyPrimitive(v));
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}).join(sep);
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} else {
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return ks + QueryString.escape(stringifyPrimitive(obj[k]));
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}
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}).join(sep);
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}
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if (!name) {
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return '';
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}
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return QueryString.escape(stringifyPrimitive(name)) + eq +
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QueryString.escape(stringifyPrimitive(obj));
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};
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// Parse a key=val string.
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QueryString.parse = QueryString.decode = function(qs, sep, eq, options) {
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sep = sep || '&';
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eq = eq || '=';
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var obj = {};
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if (typeof qs !== 'string' || qs.length === 0) {
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return obj;
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}
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var regexp = /\+/g;
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qs = qs.split(sep);
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var maxKeys = 1000;
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if (options && typeof options.maxKeys === 'number') {
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maxKeys = options.maxKeys;
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}
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var len = qs.length;
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// maxKeys <= 0 means that we should not limit keys count
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if (maxKeys > 0 && len > maxKeys) {
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len = maxKeys;
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}
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for (var i = 0; i < len; ++i) {
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var x = qs[i].replace(regexp, '%20'),
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idx = x.indexOf(eq),
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kstr, vstr, k, v;
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if (idx >= 0) {
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kstr = x.substr(0, idx);
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vstr = x.substr(idx + 1);
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} else {
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kstr = x;
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vstr = '';
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}
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k = QueryString.unescape(kstr);
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v = QueryString.unescape(vstr);
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if (!hasOwnProp(obj, k)) {
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obj[k] = v;
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} else if (Array.isArray(obj[k])) {
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obj[k].push(v);
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} else {
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obj[k] = [obj[k], v];
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}
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}
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return obj;
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};
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