Function decodeString

public/javascripts/socket.io.js:1303–1360

* Decode a packet String (JSON data) * * @param {String} str * @return {Object} packet * @api private

(str)

	 */

	function decodeString(str) {
	  var p = {};
	  var i = 0;

	  // look up type
	  p.type = Number(str.charAt(0));
	  if (null == exports.types[p.type]) return error();

	  // look up attachments if type binary
	  if (exports.BINARY_EVENT == p.type || exports.BINARY_ACK == p.type) {
	    var buf = '';
	    while (str.charAt(++i) != '-') {
	      buf += str.charAt(i);
	      if (i == str.length) break;
	    }
	    if (buf != Number(buf) || str.charAt(i) != '-') {
	      throw new Error('Illegal attachments');
	    }
	    p.attachments = Number(buf);
	  }

	  // look up namespace (if any)
	  if ('/' == str.charAt(i + 1)) {
	    p.nsp = '';
	    while (++i) {
	      var c = str.charAt(i);
	      if (',' == c) break;
	      p.nsp += c;
	      if (i == str.length) break;
	    }
	  } else {
	    p.nsp = '/';
	  }

	  // look up id
	  var next = str.charAt(i + 1);
	  if ('' !== next && Number(next) == next) {
	    p.id = '';
	    while (++i) {
	      var c = str.charAt(i);
	      if (null == c || Number(c) != c) {
	        --i;
	        break;
	      }
	      p.id += str.charAt(i);
	      if (i == str.length) break;
	    }
	    p.id = Number(p.id);
	  }

	  // look up json data
	  if (str.charAt(++i)) {
	    p = tryParse(p, str.substr(i));
	  }

	  debug('decoded %s as %j', str, p);
	  return p;
	}