我正在将WebRTC本地应用到安卓系统中。我能够像这里所描述的那样编译和运行代码,但是我遇到了一个问题,在这个问题上,http://www.webrtc.org/native-code/android显然没有像设想的那样返回一个通道令牌:
01-05 20:01:51.230 15488-15488/org.appspot.apprtc E/AppRTCDemoActivity﹕ Fatal error: Missing channelToken in HTML: <!DOCTYPE html>
<!--
* Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree.
-->
<html>
<head>
<title>WebRTC Reference App</title>
<meta charset="utf-8">
<meta name="description" content="WebRTC reference app">
<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1, maximum-scale=1">
<script type='text/javascript'>window.mod_pagespeed_start = Number(new Date());</script><link rel="canonical" href="https://apprtc.appspot.com/room/42272483?r=fh">
<link rel="stylesheet" href="https://1-ps.googleusercontent.com/sxk/j1xSZgZ8VRf8QgCJPihVzk5mBR/s.apprtc.appspot.com/apprtc.appspot.com/css/A.main.css.pagespeed.cf.mluzaRyZGPUUQu3CIFwW.css">
</head>
<body><noscript><meta HTTP-EQUIV="refresh" content="0;url='https://apprtc.appspot.com/r/42272483?r=fh&PageSpeed=noscript'" /><style><!--table,div,span,font,p{display:none} --></style><div style="display:block">Please click <a href="https://apprtc.appspot.com/r/42272483?r=fh&PageSpeed=noscript">here</a> if you are not redirected within a few seconds.</div></noscript>
<div id="videos">
<video id="mini-video" autoplay muted></video>
<canvas id="remote-canvas"></canvas>
<video id="remote-video" autoplay></video>
<video id="local-video" autoplay muted></video>
</div>
<footer>
<div id="sharing">
<div id="room-link">Waiting for someone to join this room: <a href="https://apprtc.appspot.com/room/42272483?r=fh" target="_blank">https://apprtc.appspot.com/room/42272483?r=fh</a></div>
</div>
<div id="info"></div>
<div id="status"></div>
</footer>
<script src="https://1-ps.googleusercontent.com/sxk/j1xSZgZ8VRf8QgCJPihVzk5mBR/s.apprtc.appspot.com/apprtc.appspot.com/js/stats.js.pagespeed.jm.A-w15PL7V0sRNC026ANH.js"></script>
<script src="https://1-ps.googleusercontent.com/sxk/j1xSZgZ8VRf8QgCJPihVzk5mBR/s.apprtc.appspot.com/apprtc.appspot.com/js/signaling.js.pagespeed.jm.QZ7VRUXKfNhiyV7jHkmW.js"></script>
<script src="https://1-ps.googleusercontent.com/sxk/j1xSZgZ8VRf8QgCJPihVzk5mBR/s.apprtc.appspot.com/apprtc.appspot.com/js/infobox.js.pagespeed.jm.C9t_78UyYtO6bMRljt_L.js"></script>
<script src="https://1-ps.googleusercontent.com/sxk/j1xSZgZ8VRf8QgCJPihVzk5mBR/s.apprtc.appspot.com/apprtc.appspot.com/js/sdputils.js.pagespeed.jm.DWy54ENwSOTLQKw10p1o.js"></script>
<script src="https://1-ps.googleusercontent.com/sxk/j1xSZgZ8VRf8QgCJPihVzk5mBR/s.apprtc.appspot.com/apprtc.appspot.com/js/util.js.pagespeed.jm.q3iuB_S1TC2eBJC_RFlb.js"></script>
<script src="https://1-ps.googleusercontent.com/sxk/j1xSZgZ8VRf8QgCJPihVzk5mBR/s.apprtc.appspot.com/apprtc.appspot.com/js/main.js.pagespeed.jm.mR4sH1O_ReNLDaNiS3o_.js"></script>
<script src="https://1-ps.googleusercontent.com/sxk/j1xSZgZ8VRf8QgCJPihVzk5mBR/s.apprtc.appspot.com/apprtc.appspot.com/js/adapter.js.pagespeed.jm.-Ip1bBjviqtsxeGluAGS.js"></script>
<script type="text/javascript">var params={errorMessages:[],isLoopback:false,roomId:'42272483',roomLink:'https://apprtc.appspot.com/room/42272483?r=fh',mediaConstraints:{"audio":true,"video":true},offerConstraints:{"optional":[],"mandatory":{}},peerConnectionConfig:{"iceServers":[]},peerConnectionConstraints:{"optional":[{"googImprovedWifiBwe":true}]},turnRequestUrl:'https://computeengineondemand.appspot.com/turn?username=280585048&key=4080218913',turnTransports:'',audioSendBitrate:'',audioSendCodec:'',audioRecvBitrate:'',audioRecvCodec:'',isStereoscopic:'',opusMaxPbr:'',opusFec:'',opusStereo:'',videoSendBitrate:'',videoSendInitialBitrate:'',videoSendCodec:'',videoRecvBitrate:'',videoRecvCodec:'',wssUrl:'wss://apprtc-ws.webrtc.org:443/ws',wssPostUrl:'https://apprtc-ws.webrtc.org:443'};initialize();</script>
<script>(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.cr在查看AppRTCClient.java这里的源代码时,https://code.google.com/p/webrtc/source/browse/trunk/talk/examples/android/src/org/appspot/apprtc/AppRTCClient.java?r=5847在第234 of行找到了一条有趣的评论,这正是应用程序失败的地方:
// Fetches |url| and fishes the signaling parameters out of the HTML via
// regular expressions.
//
// TODO(fischman): replace this hackery with a dedicated JSON-serving URL in
// apprtc so that this isn't necessary (here and in other future apps that
// want to interop with apprtc).
private AppRTCSignalingParameters getParametersForRoomUrl(String url)
throws IOException {
// ...
}在这个函数中,对html代码进行了大量的解析,并且似乎没有从服务器返回的响应html中正确地解析通道令牌(这是不足为奇的)。
我没有进一步研究信道令牌是否存在和/或它是否正确。相反,我怀疑代码(主干!)可能是过时的,谷歌搜索,并发现这个项目上的Github:https://github.com/pristineio/webrtc-android
在第232 to行,相同的函数作为参数传入&t=json,据推测是因为它希望服务器返回Json。然后,函数在解析Json时失败,猜猜原因。对啰!因为返回相同的html页,不管参数是带还是不带。
// Fetches |url| and fishes the signaling parameters out of the JSON.
private AppRTCSignalingParameters getParametersForRoomUrl(String url)
throws IOException, JSONException {
url = url + "&t=json";
// ...
}为了完整起见,失败的完整URL:
https://apprtc.appspot.com/?r=00000000&t=json00000000是房间号。
因此,在此期间,谷歌的费斯奇曼先生似乎已经更新了代码,但webrtc的代码并不是最新的,Github的pristineio/webrtc-android似乎知道曾经让apprtc.appspot.com返回Json而不是html的参数,但它不再知道。
我搜索了apprtc.appspot.com的服务器代码,但没有找到它,但我记得以前见过它(我相信这是一个Python项目)。
然后,我搜索了该URL的参数,并在其中找到了两个页面,其中包括http://samdutton.github.io/webrtc/samples/web/content/apprtc/params.html,但没有一个页面显示参数或替代URL作为Json请求结果。
谢谢!
发布于 2015-01-06 08:40:31
遇到和你一样的问题。我在这里找到了密码:
https://github.com/GoogleChrome/webrtc/tree/master/samples/web/content/apprtc
目前,通过观察变化,看看是什么可能打破了它。如果我发现什么,我会更新这个答案。
更新:看起来他们在这个提交中做了一些突破性的更改:
他们正在从GAE通道api移动到websocket通道。
https://stackoverflow.com/questions/27792233
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