Moves HTTP POST handling to JS.

chrome/browser/resources/print_preview/cloud_print_interface.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 cr.define('cloudprint', function() {
   'use strict';
 
   /**
    * API to the Google Cloud Print service.
    * @param {string} baseUrl Base part of the Google Cloud Print service URL
@@ skipping 35 matching lines @@
 
   /**
    * Content type header value for a URL encoded HTTP request.
    * @type {string}
    * @private
    */
   CloudPrintInterface.URL_ENCODED_CONTENT_TYPE_ =
       'application/x-www-form-urlencoded';
 
   /**
+   * Multi-part POST request boundary used in communication with Google
+   * Cloud Print.
+   * @type {string}
+   * @private
+   */
+  CloudPrintInterface.MULTIPART_BOUNDARY_ =
+      '----CloudPrintFormBoundaryjc9wuprokl8i';
+
+  /**
    * Content type header value for a multipart HTTP request.
    * @type {string}
    * @private
    */
   CloudPrintInterface.MULTIPART_CONTENT_TYPE_ =
-      'multipart/form-data; boundary=----CloudPrintFormBoundaryjc9wuprokl8i';
+      'multipart/form-data; boundary=' +
+      CloudPrintInterface.MULTIPART_BOUNDARY_;
 
   /**
    * Enumeration of JSON response fields from Google Cloud Print API.
    * @enum {string}
    * @private
    */
   CloudPrintInterface.JsonFields_ = {
     PRINTER: 'printer'
   };
 
   CloudPrintInterface.prototype = {
     __proto__: cr.EventTarget.prototype,
 
     /**
      * Sends a Google Cloud Print search API request.
      * @param {boolean} isRecent Whether to search for only recently used
      *     printers.
      */
     search: function(isRecent) {
       var params = {};
       if (isRecent) {
         params['q'] = '^recent';
       }
       params['connection_status'] = 'ALL';
       params['client'] = 'chrome';
-      this.sendRequest_('GET', 'search', params, null,
+      this.sendRequest_('GET', 'search', params,
                         this.onSearchDone_.bind(this, isRecent));
     },
 
     /**
      * Sends a Google Cloud Print submit API request.
-     * @param {string} body Body of the HTTP post request to send.
+     * @param {!print_preview.Destination} destination Cloud destination to
+     *     print to.
+     * @param {!print_preview.PrintTicketStore} printTicketStore Contains the
+     *     print ticket to print.
+     * @param {string} data Base64 encoded data of the document.
      */
-    submit: function(body) {
-      this.sendRequest_('POST', 'submit', null, body,
+    submit: function(destination, printTicketStore, data) {
+      var params = {
+        'printerid': destination.id,
+        'contentType': 'dataUrl',
+        'title': printTicketStore.getDocumentTitle(),
+        'capabilities': this.createPrintTicket_(destination, printTicketStore),
+        'content': 'data:application/pdf;base64,' + data,
+      };
+      this.sendRequest_('POST', 'submit', params,
                         this.onSubmitDone_.bind(this));
     },
 
     /**
      * Sends a Google Cloud Print printer API request.
      * @param {string} printerId ID of the printer to lookup.
      */
     printer: function(printerId) {
       var params = {'printerid': printerId};
-      this.sendRequest_('GET', 'printer', params, null,
+      this.sendRequest_('GET', 'printer', params,
                         this.onPrinterDone_.bind(this, printerId));
     },
 
     /**
      * Sends a Google Cloud Print update API request to accept (or reject) the
      * terms-of-service of the given printer.
      * @param {string} printerId ID of the printer to accept the
      *     terms-of-service for.
      * @param {boolean} isAccepted Whether the user accepted the
      *     terms-of-service.
      */
     updatePrinterTosAcceptance: function(printerId, isAccepted) {
       var params = {
         'printerid': printerId,
         'is_tos_accepted': isAccepted
       };
-      this.sendRequest_('POST', 'update', params, null,
+      this.sendRequest_('POST', 'update', params,
                         this.onUpdatePrinterTosAcceptanceDone_.bind(this));
     },
 
     /**
      * Creates an object that represents a Google Cloud Print print ticket.
      * @param {!print_preview.Destination} destination Destination to print to.
      * @param {!print_preview.PrintTicketStore} printTicketStore Used to create
      *     the state of the print ticket.
      * @return {!Object} Google Cloud Print print ticket.
+     * @private
      */
-    createPrintTicket: function(destination, printTicketStore) {
+    createPrintTicket_: function(destination, printTicketStore) {
       assert(!destination.isLocal,
              'Trying to create a Google Cloud Print print ticket for a local ' +
                  'destination');
       assert(destination.capabilities,
              'Trying to create a Google Cloud Print print ticket for a ' +
                  'destination with no print capabilities');
 
       var ticketItems = [];
 
       if (destination.capabilities.collateCapability) {
@@ skipping 42 matching lines @@
       return {
         'capabilities': ticketItems
       };
     },
 
     /**
      * Sends a request to the Google Cloud Print API.
      * @param {string} method HTTP method of the request.
      * @param {string} action Google Cloud Print action to perform.
      * @param {Object} params HTTP parameters to include in the request.
-     * @param {string} body HTTP multi-part encoded body.
      * @param {function(number, Object)} callback Callback to invoke when
      *     request completes.
      */
-    sendRequest_: function(method, action, params, body, callback) {
+    sendRequest_: function(method, action, params, callback) {
       if (!this.xsrfToken_) {
         // TODO(rltoscano): Should throw an error if not a read-only action or
         // issue an xsrf token request.
       }
       var url = this.baseURL_ + '/' + action + '?xsrf=' + this.xsrfToken_;
+      var body = null;
 
       if (params) {
-        for (var paramName in params) {
-          url += '&' + paramName + '=' + encodeURIComponent(params[paramName]);
+        if (method == 'GET') {
+          for (var paramName in params) {
+            url += '&' + paramName + '=' +
+                encodeURIComponent(params[paramName]);
+          }
+        } else {
+          body = '--' + CloudPrintInterface.MULTIPART_BOUNDARY_ + '\r\n';
+          for (var paramName in params) {
+            body += 'Content-Disposition: form-data; name=\"' + paramName +
+                '\"\r\n\r\n' + params[paramName] + '\r\n--' +
+                CloudPrintInterface.MULTIPART_BOUNDARY_ + '\r\n';
+          }
         }
       }
 
       var headers = {};
       headers['X-CloudPrint-Proxy'] = 'ChromePrintPreview';
       if (method == 'GET') {
         headers['Content-Type'] = CloudPrintInterface.URL_ENCODED_CONTENT_TYPE_;
       } else if (method == 'POST') {
         headers['Content-Type'] = CloudPrintInterface.MULTIPART_CONTENT_TYPE_;
       }
@@ skipping 143 matching lines @@
         this.dispatchEvent(errorEvent);
       }
     }
   };
 
   // Export
   return {
     CloudPrintInterface: CloudPrintInterface
   };
 });