2

尝试从 HttpUrlConnection 读取数据时（访问 InputStream 时）出现 Java.IO.EOFException 我将 xamarin 与 OkHttp 库一起使用，该应用程序在 Android 4.2.2 的 genymotion 模拟器上运行

这是示例代码（C#）：

    // ...
       var okHttpClient = CreateHttpClient();
       var conn = okHttpClient.Open(new URL(address));
       var inputStream = conn.InputStream; //here is the exception
    // ...

    private OkHttpClient CreateHttpClient()
    {
        OkHttpClient client = new OkHttpClient();
        client.SetProxy(new Proxy(Proxy.Type.Http, new InetSocketAddress(Host, Port)));
        client.SetAuthenticator(new MyAuthenticator(User, Password));            

        return client;
    }

    private class MyAuthenticator: Java.Lang.Object, IOkAuthenticator
    {
        private readonly string _user;
        private readonly string _password;

        public MyAuthenticator(string user, string password)
        {
            _user = user;
            _password = password;
        }

        public OkAuthenticatorCredential Authenticate(Proxy p0, URL p1, IList<OkAuthenticatorChallenge> p2)
        {
            return OkAuthenticatorCredential.Basic(null, null); //this is never called
        }

        public OkAuthenticatorCredential AuthenticateProxy(Proxy p0, URL p1, IList<OkAuthenticatorChallenge> p2)
        {
            return OkAuthenticatorCredential.Basic(_user, _password);
        }
    }

当代理未经授权时，一切正常。

当我使用 .Net mono WebClient 时，它适用于代理授权（但如果可能，我有理由不使用 mono WebClient）

解决方法 conn.SetRequestProperty("Connection", "close"); 没有帮助。

堆栈跟踪：

Download Error: Java.IO.EOFException: Exception of type 'Java.IO.EOFException' was thrown.
  at Android.Runtime.JNIEnv.CallObjectMethod (IntPtr jobject, IntPtr jmethod) [0x00063] in /Users/builder/data/lanes/monodroid-mlion-monodroid-4.10.1-branch/d23a19bf/source/monodroid/src/Mono.Android/src/Runtime/JNIEnv.g.cs:177 
  at Java.Net.URLConnection.get_InputStream () [0x00043] in /Users/builder/data/lanes/monodroid-mlion-monodroid-4.10.1-branch/d23a19bf/source/monodroid/src/Mono.Android/platforms/android-14/src/generated/Java.Net.URLConnection.cs:754 
  at MachiningCloud.AndroidNet.WebClient.DownloadFile (System.String address, System.String fileName) [0x0002c] in c:\Projects\iDPTech\Main\Source\DPTech.ToolSelector.Ios\MachiningCloud.AndroidNet\WebClient.cs:63 
  at UrlImageViewHelper.UrlImageViewHelper.DownloadImageToFile (System.String url, System.String filename) [0x00007] in c:\Projects\iDPTech\Main\Source\DPTech.ToolSelector.Ios\MonoDroid.UrlImageViewHelper.Android\UrlImageViewHelper.cs:387 
  at UrlImageViewHelper.UrlImageViewHelper.RunInBackgroundFunc (UrlImageViewHelper.TaskParams[] taskParams) [0x001c3] in c:\Projects\iDPTech\Main\Source\DPTech.ToolSelector.Ios\MonoDroid.UrlImageViewHelper.Android\UrlImageViewHelper.cs:349 
  --- End of managed exception stack trace ---
java.io.EOFException
    at com.squareup.okhttp.internal.Util.readAsciiLine(Util.java:342)
    at com.squareup.okhttp.internal.http.RawHeaders.fromBytes(RawHeaders.java:311)
    at com.squareup.okhttp.Connection.makeTunnel(Connection.java:313)
    at com.squareup.okhttp.Connection.upgradeToTls(Connection.java:127)
    at com.squareup.okhttp.Connection.connect(Connection.java:107)
    at com.squareup.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:294)
    at com.squareup.okhttp.internal.http.HttpEngine.sendSocketRequest(HttpEngine.java:255)
    at com.squareup.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:206)
    at com.squareup.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:351)
    at com.squareup.okhttp.internal.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:297)
    at com.squareup.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:180)
    at com.squareup.okhttp.internal.http.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:246)
    at urlimageviewhelper.AnonymousAsyncTask_3.n_doInBackground(Native Method)
    at urlimageviewhelper.AnonymousAsyncTask_3.doInBackground(AnonymousAsyncTask_3.java:29)
    at android.os.AsyncTask$2.call(AsyncTask.java:287)
    at java.util.concurrent.FutureTask.run(FutureTask.java:234)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
    at java.lang.Thread.run(Thread.java:856)

任何帮助，将不胜感激。

谢谢，

尼古拉

4

2 回答 2

2

今天看到同样的错误。我的 URL 字符串有一些空格。将其更改为 %20 后，问题消失了。

于 2014-05-25T04:10:35.677 回答
1

要使用 HTTP 代理访问 HTTPS URL，它需要建立一个隧道。这是失败的；代理没有创建隧道。您是否确认您使用的代理支持您尝试访问的 URL？

于 2014-02-08T00:37:51.097 回答