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// Copyright 2015 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 bindings for the mime handler API.
*/
var binding = require('binding').Binding.create('mimeHandlerPrivate');
var NO_STREAM_ERROR =
'Streams are only available from a mime handler view guest.';
var STREAM_ABORTED_ERROR = 'Stream has been aborted.';
var servicePromise = Promise.all([
requireAsync('content/public/renderer/service_provider'),
requireAsync('extensions/common/api/mime_handler.mojom'),
requireAsync('mojo/public/js/router'),
]).then(function(modules) {
var serviceProvider = modules[0];
var mojom = modules[1];
var routerModule = modules[2];
return new mojom.MimeHandlerService.proxyClass(new routerModule.Router(
serviceProvider.connectToService(mojom.MimeHandlerService.name)));
});
// Stores a promise to the GetStreamInfo() result to avoid making additional
// calls in response to getStreamInfo() calls.
var streamInfoPromise;
function throwNoStreamError() {
throw new Error(NO_STREAM_ERROR);
}
function createStreamInfoPromise() {
return servicePromise.then(function(service) {
return service.getStreamInfo();
}).then(function(result) {
if (!result.stream_info)
throw new Error(STREAM_ABORTED_ERROR);
return result.stream_info;
}, throwNoStreamError);
}
function constructStreamInfoDict(streamInfo) {
var headers = {};
for (var header of streamInfo.response_headers) {
headers[header[0]] = header[1];
}
return {
mimeType: streamInfo.mime_type,
originalUrl: streamInfo.original_url,
streamUrl: streamInfo.stream_url,
tabId: streamInfo.tab_id,
embedded: !!streamInfo.embedded,
responseHeaders: headers,
};
}
binding.registerCustomHook(function(bindingsAPI) {
var apiFunctions = bindingsAPI.apiFunctions;
apiFunctions.setHandleRequestWithPromise('getStreamInfo', function() {
if (!streamInfoPromise)
streamInfoPromise = createStreamInfoPromise();
return streamInfoPromise.then(constructStreamInfoDict);
});
apiFunctions.setHandleRequestWithPromise('abortStream', function() {
return servicePromise.then(function(service) {
return service.abortStream().then(function() {});
}).catch(throwNoStreamError);
});
});
exports.$set('binding', binding.generate());
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