webpack/buildin/web_modules/querystring.js

Packs CommonJs Modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loading of js, json, jade, coffee, css, ... out of the box and more with custom loaders.

// 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

var QueryString = exports;


// If obj.hasOwnProperty has been overridden, then calling
// obj.hasOwnProperty(prop) will break.
// See: https://github.com/joyent/node/issues/1707
function hasOwnProperty(obj, prop) {
  return Object.prototype.hasOwnProperty.call(obj, prop);
}


function charCode(c) {
  return c.charCodeAt(0);
}


QueryString.unescape = function(s, decodeSpaces) {
  return decodeURIComponent(s, decodeSpaces)
};


QueryString.escape = function(str) {
  return encodeURIComponent(str);
};

var stringifyPrimitive = function(v) {
  switch (typeof v) {
    case 'string':
      return v;

    case 'boolean':
      return v ? 'true' : 'false';

    case 'number':
      return isFinite(v) ? v : '';

    default:
      return '';
  }
};


QueryString.stringify = QueryString.encode = function(obj, sep, eq, name) {
  sep = sep || '&';
  eq = eq || '=';
  obj = (obj === null) ? undefined : obj;

  switch (typeof obj) {
    case 'object':
      return Object.keys(obj).map(function(k) {
        if (Array.isArray(obj[k])) {
          return obj[k].map(function(v) {
            return QueryString.escape(stringifyPrimitive(k)) +
                   eq +
                   QueryString.escape(stringifyPrimitive(v));
          }).join(sep);
        } else {
          return QueryString.escape(stringifyPrimitive(k)) +
                 eq +
                 QueryString.escape(stringifyPrimitive(obj[k]));
        }
      }).join(sep);

    default:
      if (!name) return '';
      return QueryString.escape(stringifyPrimitive(name)) + eq +
             QueryString.escape(stringifyPrimitive(obj));
  }
};

// Parse a key=val string.
QueryString.parse = QueryString.decode = function(qs, sep, eq, options) {
  sep = sep || '&';
  eq = eq || '=';
  var obj = {},
      maxKeys = 1000;

  // Handle maxKeys = 0 case
  if (options && typeof options.maxKeys === 'number') {
    maxKeys = options.maxKeys;
  }

  if (typeof qs !== 'string' || qs.length === 0) {
    return obj;
  }

  var regexp = /\+/g;
  qs = qs.split(sep);

  // maxKeys <= 0 means that we should not limit keys count
  if (maxKeys > 0) {
    qs = qs.slice(0, maxKeys);
  }

  for (var i = 0, len = qs.length; i < len; ++i) {
    var x = qs[i].replace(regexp, '%20'),
        idx = x.indexOf(eq),
        kstr = x.substring(0, idx),
        vstr = x.substring(idx + 1), k, v;

    try {
      k = decodeURIComponent(kstr);
      v = decodeURIComponent(vstr);
    } catch (e) {
      k = QueryString.unescape(kstr, true);
      v = QueryString.unescape(vstr, true);
    }

    if (!hasOwnProperty(obj, k)) {
      obj[k] = v;
    } else if (!Array.isArray(obj[k])) {
      obj[k] = [obj[k], v];
    } else {
      obj[k].push(v);
    }
  }

  return obj;
};