Javascript 错误：无法下推传输描述：无法应用远程指纹

我编写了两个单元测试来验证我的应用程序中是否正确实现了提供/应答机制。第一个单元测试在收到报价时验证对等方的行为，而第二个单元测试在创建报价时验证对等方的行为。对于我的单元测试，我使用了以下模拟报价和模拟答案：

报价：

var mockOffer {   "sdp": "v=0\r\n" +
    "o=- 7282588543017546346 2 IN IP4 127.0.0.1\r\n" +
    "s=-\r\n" +
    "t=0 0\r\n" +
    "a=group:BUNDLE audio video\r\n" +
    "a=msid-semantic: WMS\r\n" +
    "m=audio 1 RTP/SAVPF 111 103 104 0 8 106 105 13 126\r\n" +
    "c=IN IP4 0.0.0.0\r\n" +
    "a=rtcp:1 IN IP4 0.0.0.0\r\n" +
    "a=ice-ufrag:IJU9DHoiy8+X8FtX\r\n" +
    "a=ice-pwd:3qgT9ydEM/CMkgan8ZWvgvbg\r\n" +
    "a=ice-options:google-ice\r\n" +
    "a=fingerprint:sha-256 54:90:7A:6F:BC:46:C4:5F:25:B9:02:97:3D:A7:53:5D:B4:F6:CE:55:EB:78:51:84:0C:41:0B:2B:21:AA:CD:05\r\n" +
    "a=setup:actpass\r\n" +
    "a=mid:audio\r\n" +
    "a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level\r\n" +
    "a=recvonly\r\n" +
    "a=rtcp-mux\r\n" +
    "a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:gC/fmSmErYS1MaaCQnXZRtKR6l8yWMc5zbOpdVT8\r\n" +
    "a=rtpmap:111 opus/48000/2\r\n" +
    "a=fmtp:111 minptime=10\r\n" +
    "a=rtpmap:103 ISAC/16000\r\n" +
    "a=rtpmap:104 ISAC/32000\r\n" +
    "a=rtpmap:0 PCMU/8000\r\n" +
    "a=rtpmap:8 PCMA/8000\r\n" +
    "a=rtpmap:106 CN/32000\r\n" +
    "a=rtpmap:105 CN/16000\r\n" +
    "a=rtpmap:13 CN/8000\r\n" +
    "a=rtpmap:126 telephone-event/8000\r\n" +
    "a=maxptime:60\r\n" +
    "m=video 1 RTP/SAVPF 100 116 117\r\n" +
    "c=IN IP4 0.0.0.0\r\n" +
    "a=rtcp:1 IN IP4 0.0.0.0\r\n" +
    "a=ice-ufrag:IJU9DHoiy8+X8FtX\r\n" +
    "a=ice-pwd:3qgT9ydEM/CMkgan8ZWvgvbg\r\n" +
    "a=ice-options:google-ice\r\n" +
    "a=fingerprint:sha-256 54:90:7A:6F:BC:46:C4:5F:25:B9:02:97:3D:A7:53:5D:B4:F6:CE:55:EB:78:51:84:0C:41:0B:2B:21:AA:CD:05\r\n" +
    "a=setup:actpass\r\n" +
    "a=mid:video\r\n" +
    "a=extmap:2 urn:ietf:params:rtp-hdrext:toffset\r\n" +
    "a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time\r\n" +
    "a=recvonly\r\n" +
    "a=rtcp-mux\r\n" +
    "a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:gC/fmSmErYS1MaaCQnXZRtKR6l8yWMc5zbOpdVT8\r\n" +
    "a=rtpmap:100 VP8/90000\r\n" +
    "a=rtcp-fb:100 ccm fir\r\n" +
    "a=rtcp-fb:100 nack\r\n" +
    "a=rtcp-fb:100 nack pli\r\n" +
    "a=rtcp-fb:100 goog-remb\r\n" +
    "a=rtpmap:116 red/90000\r\n" +
    "a=rtpmap:117 ulpfec/90000\r\n", 
    "type":"offer"};

答复:

  var mockAnswer = {"sdp":
       "v=0\r\n" +
       "o=- 6465573306213105510 2 IN IP4 127.0.0.1\r\n" +
           "s=-\r\n" +
           "t=0 0\r\n" +
           "a=group:BUNDLE audio video\r\n" +
           "a=msid-semantic: WMS\r\n" +
           "m=audio 1 RTP/SAVPF 111 103 104 0 8 106 105 13 126\r\n" +
           "c=IN IP4 0.0.0.0\r\n" +
           "a=rtcp:1 IN IP4 0.0.0.0\r\n" +
           "a=ice-ufrag:AyBahFUhrQOPtHlQ\r\n" +
           "a=ice-pwd:QGUAtvpJDqYq2F8BUH2ZWdGv\r\n" +
           "a=fingerprint:sha-256 54:90:7A:6F:BC:46:C4:5F:25:B9:02:97:3D:A7:53:5D:B4:F6:CE:55:EB:78:51:84:0C:41:0B:2B:21:AA:CD:05\r\n" +
           "a=setup:active\r\n" +
           "a=mid:audio\r\n" +
           "a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level\r\n" +
           "a=sendonly\r\n" +
           "a=rtcp-mux\r\n" +
           "a=rtpmap:111 opus/48000/2\r\n" +
           "a=fmtp:111 minptime=10\r\n" +
           "a=rtpmap:103 ISAC/16000\r\n" +
           "a=rtpmap:104 ISAC/32000\r\n" +
           "a=rtpmap:0 PCMU/8000\r\n" +
           "a=rtpmap:8 PCMA/8000\r\n" +
           "a=rtpmap:106 CN/32000\r\n" +
           "a=rtpmap:105 CN/16000\r\n" +
           "a=rtpmap:13 CN/8000\r\n" +
           "a=rtpmap:126 telephone-event/8000\r\n" +
           "a=maxptime:60\r\n" +
           "m=video 1 RTP/SAVPF 100 116 117\r\n" +
           "c=IN IP4 0.0.0.0\r\n" +
           "a=rtcp:1 IN IP4 0.0.0.0\r\n" +
           "a=ice-ufrag:AyBahFUhrQOPtHlQ\r\n" +
           "a=ice-pwd:QGUAtvpJDqYq2F8BUH2ZWdGv\r\n" +
           "a=fingerprint:sha-256 54:90:7A:6F:BC:46:C4:5F:25:B9:02:97:3D:A7:53:5D:B4:F6:CE:55:EB:78:51:84:0C:41:0B:2B:21:AA:CD:05\r\n" +
           "a=setup:active\r\n" +
           "a=mid:video\r\n" +
           "a=extmap:2 urn:ietf:params:rtp-hdrext:toffset\r\n" +
           "a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time\r\n" +
           "a=sendonly\r\n" +
           "a=rtcp-mux\r\n" +
           "a=rtpmap:100 VP8/90000\r\n" +
           "a=rtcp-fb:100 ccm fir\r\n" +
           "a=rtcp-fb:100 nack\r\n" +
           "a=rtcp-fb:100 nack pli\r\n" +
           "a=rtcp-fb:100 goog-remb\r\n" +
           "a=rtpmap:116 red/90000\r\n" +
           "a=rtpmap:117 ulpfec/90000\r\n",
    "type": "answer"};

注意：它们是使用createAnswer和createOffer方法生成的

• 第一个问题为什么有两个指纹字段

第一个单元测试反映了当对等方收到远程提供并回答时的场景。我通过提供调用setRemoteDescriptor，然后通过回答调用serLocalDescriptor。此测试工作正常，不会引发任何错误，并且SignalingState会根据执行的操作进行更改（例如，setRemoteDescriptor会导致SignalingState更改并具有远程提供，等等）

单元测试：

it("Test the signalStatus machine when a peer receives an offer", function(done){
          var peerReceiver = new app.PeerConnection("mock_receiver", session, false);


          var successRemote = function(){
              console.log("Remote descriptor installed successfully.");
              expect(peerReceiver.getSignalingState()).toEqual("have-remote-offer");
              peerReceiver._setLocalDescriptor(mockAnswer, successLocal, failure);
          };


          var successLocal = function(){
              console.log("Local descriptor installed successfully.");
              expect(peerReceiver.getSignalingState()).toEqual("stable");
              done();
          }.bind(this);


          var failure = function(error){
              console.log("Error installing SDP." + error);
              expect(error).toBeNull();
              done();
          }.bind(this);


          expect(peerReceiver.getSignalingState()).toEqual("none");
          peerReceiver._setRemoteDescription(mockOffer, successRemote,failure);
      });

 it("Test the signalStatus machine when a peer sends an offer", function(done){
          var peerSender  = new app.PeerConnection("mock_sender", session, false);


          var successRemote = function(){
              console.log("Remote descriptor installed successfully.");
              expect(peerSender.getSignalingState()).toEqual("stable");
              done();
          };


          var successLocal = function(){
              console.log("Local descriptor installed successfully.");
              expect(peerSender.getSignalingState()).toEqual("have-local-offer");
              peerSender._setRemoteDescription(mockAnswer, successRemote,failure);
          }.bind(this);


          var failure = function(error){
              console.log("Error installing SDP." + error);
              expect(error).toBeNull();
              done();
          }.bind(this);


          expect(peerSender.getSignalingState()).toEqual("none");
          peerSender._setLocalDescriptor(mockOffer, successLocal,failure);
      });

第二个单元测试使用相同的模拟答案和提议，但它反映了当对等方创建并设置本地提议，并将从远程对等方接收到的答案设置为远程提议时的场景。 该测试使用提供调用setLocalDescriptor。因此，SIngnalingState将更改为具有本地报价。然后使用mockAnswer调用setRemoteDescription。此调用生成以下错误：

ERROR : Failed to set remote answer sdp: Failed to push down transport description: Failed to apply remote fingerprint.

原因可能是什么？我做错什么了吗？报价和应答中的指纹完全相同，如果指纹有问题，那么在第一个单元测试中也应该有问题。我不懂。欢迎提出任何建议和建议D

单元测试失败：

it("Test the signalStatus machine when a peer receives an offer", function(done){
          var peerReceiver = new app.PeerConnection("mock_receiver", session, false);


          var successRemote = function(){
              console.log("Remote descriptor installed successfully.");
              expect(peerReceiver.getSignalingState()).toEqual("have-remote-offer");
              peerReceiver._setLocalDescriptor(mockAnswer, successLocal, failure);
          };


          var successLocal = function(){
              console.log("Local descriptor installed successfully.");
              expect(peerReceiver.getSignalingState()).toEqual("stable");
              done();
          }.bind(this);


          var failure = function(error){
              console.log("Error installing SDP." + error);
              expect(error).toBeNull();
              done();
          }.bind(this);


          expect(peerReceiver.getSignalingState()).toEqual("none");
          peerReceiver._setRemoteDescription(mockOffer, successRemote,failure);
      });

 it("Test the signalStatus machine when a peer sends an offer", function(done){
          var peerSender  = new app.PeerConnection("mock_sender", session, false);


          var successRemote = function(){
              console.log("Remote descriptor installed successfully.");
              expect(peerSender.getSignalingState()).toEqual("stable");
              done();
          };


          var successLocal = function(){
              console.log("Local descriptor installed successfully.");
              expect(peerSender.getSignalingState()).toEqual("have-local-offer");
              peerSender._setRemoteDescription(mockAnswer, successRemote,failure);
          }.bind(this);


          var failure = function(error){
              console.log("Error installing SDP." + error);
              expect(error).toBeNull();
              done();
          }.bind(this);


          expect(peerSender.getSignalingState()).toEqual("none");
          peerSender._setLocalDescriptor(mockOffer, successLocal,failure);
      });

RPCPeerConnection对象，生成错误时：

RTCPeerConnection {ondatachannel: null, oniceconnectionstatechange: function, onremovestream: function, onaddstream: function, onsignalingstatechange: function…}
iceConnectionState: "new"
iceGatheringState: "new"
localDescription: RTCSessionDescription
onaddstream: function (stream) { self.onRemoteStreamAdded(stream);}
ondatachannel: null
onicecandidate: function (e) { self.onIceCandidate(e, pc.iceGatheringState)}
oniceconnectionstatechange: function (e) { self.onIceConnectionStatusStateChange(e)}
onnegotiationneeded: null
onremovestream: function (stream) { self.onRemoteStreamRemoved(stream);}
onsignalingstatechange: function (e) {self.onSignalingStateChange(e)}
remoteDescription: null
signalingState: "have-local-offer"
__proto__: RTCPeerConnection
 PeerConnection.js:287
Error installing SDP.undefined 

整个源代码都可以找到

如果你需要更多信息，请告诉我