este-library-oldschool/este/net/chunkedjsonp.js

Library for github.com/steida/este.git

// Generated by github.com/steida/coffee2closure 900.1.18
/**
  @fileoverview Chunked JSONP implementation. Payload is divided into max. 2kb
  chunks.
 */
goog.provide('este.net.ChunkedJsonp');
goog.provide('este.net.ChunkedJsonp.create');
goog.require('goog.net.Jsonp');
goog.require('este.string');
goog.require('este.json');

/**
  @param {Function} jsonpFactory
  @param {Function} randomStringFactory
  @constructor
 */
este.net.ChunkedJsonp = function(jsonpFactory1, randomStringFactory) {
  this.jsonpFactory = jsonpFactory1;
  this.randomStringFactory = randomStringFactory;
}

/**
  @param {goog.Uri|string} uri The Uri of the server side code that receives
  data posted through this channel (e.g., "http://maps.google.com/maps/geo").
  @param {string=} opt_callbackParamName The parameter name that is used to
  specify the callback. Defaults to "callback".
 */
este.net.ChunkedJsonp.create = function(uri, opt_callbackParamName) {
  var jsonpFactory;
  jsonpFactory = function() {
    return new goog.net.Jsonp(uri, opt_callbackParamName);
  };
  return new este.net.ChunkedJsonp(jsonpFactory, goog.string.getRandomString);
};

/**
  http://support.microsoft.com/kb/208427
  @type {number}
 */
este.net.ChunkedJsonp.MAX_CHUNK_SIZE = 1900;

/**
  @type {Function}
  @protected
 */
este.net.ChunkedJsonp.prototype.jsonpFactory = null;

/**
  @type {Function}
  @protected
 */
este.net.ChunkedJsonp.prototype.randomStringFactory = null;

/**
  @param {Object} payload
  @param {Function=} opt_replyCallback
 */
este.net.ChunkedJsonp.prototype.send = function(payload, opt_replyCallback) {
  var callCount, chunk, chunks, i, jsonp, jsonpPayload, jsonpReplyCallback, len, randomString;
  chunks = this.getChunks(payload);
  randomString = this.randomStringFactory();
  callCount = 0;
  jsonpReplyCallback = function() {
    callCount++;
    if (callCount === chunks.length) {
      return opt_replyCallback.apply(null, arguments);
    }
  };
  for (i = 0, len = chunks.length; i < len; i++) {
    chunk = chunks[i];
    jsonp = this.jsonpFactory();
    jsonpPayload = {
      'u': randomString,
      'd': chunk.text,
      'i': chunk.index,
      't': chunk.total
    };
    if (opt_replyCallback) {
      jsonp.send(jsonpPayload, jsonpReplyCallback);
    } else {
      jsonp.send(jsonpPayload);
    }
  }
};

/**
  @param {Object} payload
  @return {Array.<Object>}
  @protected
 */
este.net.ChunkedJsonp.prototype.getChunks = function(payload) {
  var str;
  str = este.json.stringify(payload);
  return este.string.chunkToObject(str, este.net.ChunkedJsonp.MAX_CHUNK_SIZE);
};