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// Copyright 2013 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.
// Custom binding for the GCM API.
var binding = require('binding').Binding.create('gcm');
var forEach = require('utils').forEach;
binding.registerCustomHook(function(bindingsAPI) {
var apiFunctions = bindingsAPI.apiFunctions;
var gcm = bindingsAPI.compiledApi;
apiFunctions.setUpdateArgumentsPostValidate(
'send', function(message, callback) {
// Validate message.data.
var payloadSize = 0;
forEach(message.data, function(property, value) {
if (property.length == 0)
throw new Error("One of data keys is empty.");
var lowerCasedProperty = property.toLowerCase();
// Issue an error for forbidden prefixes of property names.
if (lowerCasedProperty.indexOf("goog.") == 0 ||
lowerCasedProperty.indexOf("google") == 0 ||
property.indexOf("collapse_key") == 0) {
throw new Error("Invalid data key: " + property);
}
payloadSize += property.length + value.length;
});
if (payloadSize > gcm.MAX_MESSAGE_SIZE)
throw new Error("Payload exceeded allowed size limit. Payload size is: "
+ payloadSize);
if (payloadSize == 0)
throw new Error("No data to send.");
return arguments;
});
});
exports.binding = binding.generate();
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