Xamarin Android 本机 HttpClient 抛出异常，尽管设备上可以使用 Internet

Question

我的用户随机面临这个奇怪的错误。 有时，当用户安装我的应用程序，并且应用程序调用我们的 API 时，android http 客户端会抛出这个奇怪的异常：

\"Exception\": {
\"JniPeerMembers\": {
  \"ManagedPeerType\": \"Java.IO.IOException, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065\",
  \"JniPeerTypeName\": \"java/io/IOException\",
  \"JniPeerType\": {
    \"PeerReference\": {
      \"Handle\": {
        \"value\": 47846
      },
      \"Type\": 2,
      \"IsValid\": true
    },
    \"Name\": \"java/io/IOException\"
  },
  \"InstanceMethods\": {},
  \"InstanceFields\": {},
  \"StaticMethods\": {},
  \"StaticFields\": {}
},
\"Cause\": null,
\"Message\": \"SSL handshake aborted: ssl=0x7bb43080: I/O error during system call, Connection timed out\",
\"StackTrace\": \"  at Java.Interop.JniEnvironment+InstanceMethods.CallVoidMethod (Java.Interop.JniObjectReference instance, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue* args) [0x0006e] in <745bc921f7584f8cb01262bed321f988>:0 \n  at Java.Interop.JniPeerMembers+JniInstanceMethods.InvokeAbstractVoidMethod (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue* parameters) [0x00014] in <745bc921f7584f8cb01262bed321f988>:0 \n  at Javax.Net.Ssl.HttpsURLConnectionInvoker.Connect () [0x0000a] in <786ec849fa444dbf9954decdea4ab5fe>:0 \n  at Xamarin.Android.Net.AndroidClientHandler+<>c__DisplayClass44_0.<ConnectAsync>b__0 () [0x0007d] in <786ec849fa444dbf9954decdea4ab5fe>:0 \n  at System.Threading.Tasks.Task.InnerInvoke () [0x0000f] in <6f2c2bc69dcf420aaa80e268530dc675>:0 \n  at System.Threading.Tasks.Task.Execute () [0x00000] in <6f2c2bc69dcf420aaa80e268530dc675>:0 \n--- End of stack trace from previous location where exception was thrown ---\n\n  at Xamarin.Android.Net.AndroidClientHandler.DoProcessRequest (System.Net.Http.HttpRequestMessage request, Java.Net.URL javaUrl, Java.Net.HttpURLConnection httpConnection, System.Threading.CancellationToken cancellationToken, Xamarin.Android.Net.AndroidClientHandler+RequestRedirectionState redirectState) [0x0012e] in <786ec849fa444dbf9954decdea4ab5fe>:0 \n  at Xamarin.Android.Net.AndroidClientHandler.SendAsync (System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken) [0x002d0] in <786ec849fa444dbf9954decdea4ab5fe>:0 \n  at System.Net.Http.HttpClient.FinishSendAsyncBuffered (System.Threading.Tasks.Task`1[TResult] sendTask, System.Net.Http.HttpRequestMessage request, System.Threading.CancellationTokenSource cts, System.Boolean disposeCts) [0x0017e] in <39758e6683bd4e7989131d3fa8217009>:0 \n  at MobileApp.ApiServices.Implementations.Base.BaseService.Get[T] (System.String url, System.Boolean silent) [0x000eb] in <7bf4b59f082f4f889aa42a5c112cbdf5>:0 \n  at MobileApp.ApiServices.Implementations.AuthenticationService.Signin (System.String userName, System.String password) [0x000c1] in <7bf4b59f082f4f889aa42a5c112cbdf5>:0 \n  at MobileApp.ViewModels.LoginViewModel.OnEmailSigninExecute () [0x00154] in <9da9c1d9d94d42b888a64eff22f7e300>:0 \n  --- End of managed Java.IO.IOException stack trace ---\njavax.net.ssl.SSLHandshakeException: SSL handshake aborted: ssl=0x7bb43080: I/O error during system call, Connection timed out\n\tat com.android.org.conscrypt.NativeCrypto.SSL_do_handshake(Native Method)\n\tat com.android.org.conscrypt.SslWrapper.doHandshake(SslWrapper.java:374)\n\tat com.android.org.conscrypt.ConscryptFileDescriptorSocket.startHandshake(ConscryptFileDescriptorSocket.java:217)\n\tat com.android.okhttp.internal.io.RealConnection.connectTls(RealConnection.java:192)\n\tat com.android.okhttp.internal.io.RealConnection.connectSocket(RealConnection.java:149)\n\tat com.android.okhttp.internal.io.RealConnection.connect(RealConnection.java:112)\n\tat com.android.okhttp.internal.http.StreamAllocation.findConnection(StreamAllocation.java:184)\n\tat com.android.okhttp.internal.http.StreamAllocation.findHealthyConnection(StreamAllocation.java:126)\n\tat com.android.okhttp.internal.http.StreamAllocation.newStream(StreamAllocation.java:95)\n\tat com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:281)\n\tat com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:224)\n\tat com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:461)\n\tat com.android.okhttp.internal.huc.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:127)\n\tat com.android.okhttp.internal.huc.DelegatingHttpsURLConnection.connect(DelegatingHttpsURLConnection.java:89)\n\tat com.android.okhttp.internal.huc.HttpsURLConnectionImpl.connect(Unknown Source:0)\n\",
\"JniIdentityHashCode\": 6320254,
\"PeerReference\": {
  \"Handle\": {
    \"value\": 47610
  },
  \"Type\": 2,
  \"IsValid\": true
},
\"Handle\": {
  \"value\": 47610
},
\"Data\": {},
\"InnerException\": null,
\"Source\": \"mscorlib\",
\"HResult\": -2146233088

}

Android 设备上的 Internet 连接处于活动状态，并且 API 在查询时处于活动状态并可访问。 我不明白为什么 Android 会这样。 有人可以解释一下吗？

Answer 1

由SSL handshake error引起的问题，但我不确定是哪个因素导致了问题。 我想问题不在于代码，而在于通信通道的证书/可接受的加密算法。

大多数问题是服务器端的。 用户修复它们的可能性很低。

请检查您的证书并始终确认您已获得对最新 SSL 和 TLS 版本的支持。

希望这可以帮到你。