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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 /** |
| 6 * Custom bindings for the mime handler API. |
| 7 */ |
| 8 |
| 9 var binding = require('binding').Binding.create('mimeHandlerPrivate'); |
| 10 |
| 11 var NO_STREAM_ERROR = |
| 12 'Streams are only available from a mime handler view guest.'; |
| 13 var STREAM_ABORTED_ERROR = 'Stream has been aborted.'; |
| 14 |
| 15 var servicePromise = Promise.all([ |
| 16 requireAsync('content/public/renderer/service_provider'), |
| 17 requireAsync('extensions/common/api/mime_handler.mojom'), |
| 18 requireAsync('mojo/public/js/router'), |
| 19 ]).then(function(modules) { |
| 20 var serviceProvider = modules[0]; |
| 21 var mojom = modules[1]; |
| 22 var routerModule = modules[2]; |
| 23 return new mojom.MimeHandlerService.proxyClass(new routerModule.Router( |
| 24 serviceProvider.connectToService(mojom.MimeHandlerService.name))); |
| 25 }); |
| 26 |
| 27 // Stores a promise to the GetStreamInfo() result to avoid making additional |
| 28 // calls in response to getStreamInfo() calls. |
| 29 var streamInfoPromise; |
| 30 |
| 31 function throwNoStreamError() { |
| 32 throw new Error(NO_STREAM_ERROR); |
| 33 } |
| 34 |
| 35 function createStreamInfoPromise() { |
| 36 return servicePromise.then(function(service) { |
| 37 return service.getStreamInfo(); |
| 38 }).then(function(result) { |
| 39 if (!result.stream_info) |
| 40 throw new Error(STREAM_ABORTED_ERROR); |
| 41 return result.stream_info; |
| 42 }, throwNoStreamError); |
| 43 } |
| 44 |
| 45 function constructStreamInfoDict(streamInfo) { |
| 46 var headers = {}; |
| 47 for (var header of streamInfo.response_headers) { |
| 48 headers[header[0]] = header[1]; |
| 49 } |
| 50 return { |
| 51 mimeType: streamInfo.mime_type, |
| 52 originalUrl: streamInfo.original_url, |
| 53 streamUrl: streamInfo.stream_url, |
| 54 tabId: streamInfo.tab_id, |
| 55 embedded: !!streamInfo.embedded, |
| 56 responseHeaders: headers, |
| 57 }; |
| 58 } |
| 59 |
| 60 binding.registerCustomHook(function(bindingsAPI) { |
| 61 var apiFunctions = bindingsAPI.apiFunctions; |
| 62 apiFunctions.setHandleRequestWithPromise('getStreamInfo', function() { |
| 63 if (!streamInfoPromise) |
| 64 streamInfoPromise = createStreamInfoPromise(); |
| 65 return streamInfoPromise.then(constructStreamInfoDict); |
| 66 }); |
| 67 |
| 68 apiFunctions.setHandleRequestWithPromise('abortStream', function() { |
| 69 return servicePromise.then(function(service) { |
| 70 return service.abortStream().then(function() {}); |
| 71 }).catch(throwNoStreamError); |
| 72 }); |
| 73 }); |
| 74 |
| 75 exports.binding = binding.generate(); |
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