java.io.IOException异常：收到认证挑战是ICS 4.0.3空

问题描述

我试图从服务器注销。但它返回0响应code与此异常。我使用GET动词来做到这一点。

I'm trying to logoff from the server. But it returns "0" response code with this exception. I'm using GET verb to do this.

LogCat中

10-17 14:54:13.261: W/System.err(868): java.io.IOException: Received authentication challenge is null
10-17 14:54:13.284: W/System.err(868):  at libcore.net.http.HttpURLConnectionImpl.processAuthHeader(HttpURLConnectionImpl.java:397)
10-17 14:54:13.284: W/System.err(868):  at libcore.net.http.HttpURLConnectionImpl.processResponseHeaders(HttpURLConnectionImpl.java:345)
10-17 14:54:13.304: W/System.err(868):  at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:276)
10-17 14:54:13.324: W/System.err(868):  at libcore.net.http.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:479)
10-17 14:54:13.324: W/System.err(868):  at com.remote.synchronizer.haris.CustomHttpClient.executeGet(CustomHttpClient.java:131)
10-17 14:54:13.354: W/System.err(868):  at com.remote.synchronizer.haris.OptionsActivity$1$3$1.run(OptionsActivity.java:87)
10-17 14:54:13.364: W/System.err(868):  at android.os.Handler.handleCallback(Handler.java:605)
10-17 14:54:13.384: W/System.err(868):  at android.os.Handler.dispatchMessage(Handler.java:92)
10-17 14:54:13.384: W/System.err(868):  at android.os.Looper.loop(Looper.java:137)
10-17 14:54:13.404: W/System.err(868):  at android.app.ActivityThread.main(ActivityThread.java:4424)
10-17 14:54:13.424: W/System.err(868):  at java.lang.reflect.Method.invokeNative(Native Method)
10-17 14:54:13.424: W/System.err(868):  at java.lang.reflect.Method.invoke(Method.java:511)
10-17 14:54:13.454: W/System.err(868):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
10-17 14:54:13.474: W/System.err(868):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
10-17 14:54:13.474: W/System.err(868):  at dalvik.system.NativeStart.main(Native Method)
10-17 14:54:13.484: E/HTTP Response(868): java.io.IOException: Received authentication challenge is null

CustomHttpClient.java

public class CustomHttpClient {

    static HttpClient client = new DefaultHttpClient();
    static HttpURLConnection connection = null;

    public static int executePost(String url, String postParameters)
    {
        int response=0;

        OutputStream output = null;
        try
        {
            connection = (HttpURLConnection)new URL(url).openConnection();
            System.setProperty("http.keepAlive", "false");
            connection.setDoOutput(true);
            connection.setRequestMethod("POST");
            connection.setRequestProperty("Accept-Charset", "UTF-8");
            connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");

            connection.connect();

            output = connection.getOutputStream();
            output.write(postParameters.getBytes("UTF-8"));

            response=connection.getResponseCode();
        }
        catch(Exception e)
        {
            e.printStackTrace();
            Log.e("HTTP Response", e.toString());
        }
        finally {
            if(connection != null) {
                //  connection.disconnect();
                if (output != null)
                    try { output.close(); }
                catch (IOException logOrIgnore) {}
            }
        }

        return response;
    }

    public static int executeGet(String url)
    {
        int response=0;

        //HttpURLConnection connection = null;
        try
        {
            connection = (HttpURLConnection) new URL(url).openConnection();
            System.setProperty("http.keepAlive", "false");
            //connection.setRequestProperty("Accept-Charset", "UTF-8");
            connection.setDoInput(true);
            connection.setRequestMethod("GET");
            connection.connect();
            response=connection.getResponseCode();
        }
        catch(Exception e)
        {
            e.printStackTrace();
            Log.e("HTTP Response", e.toString());
        }
        finally {
            if(connection != null) {
                //  connection.disconnect();
            }
        }
        return response;
    }

}

这我在Gingerbird 2.3使用DefaultHTTPClient在其正常使用，但在ICS DefaultHTTPClient不工作，所以我需要使用HttpURLConnection的。 POST谓词是工作的罚款。

Before this I'm using DefaultHTTPClient in Gingerbird 2.3 its working perfectly but in ICS DefaultHTTPClient is not working so I need to use HttpURLConnection. POST verb is working fine.

推荐答案

您可以得到一个异常后的反应code，如果你打电话.getResponse code（）第二次连接对象上。这是因为你第一次调用.getResponse code（）的内部状态设置，使.getResponse code（），以未抛出异常返回。

You can get the response code after an exception if you call .getResponseCode() a second time on the connection object. This is because the first time you call .getResponseCode() an internal state is set that enables .getResponseCode() to return without throwing an exception.

例如：

HttpURLConnection connection = ...;
try {
    // Will throw IOException if server responds with 401.
    connection.getResponseCode();
} catch (IOException e) {
    // Will return 401, because now connection has the correct internal state.
    int responsecode = connection.getResponseCode();
}

我也曾在这里回答了这个问题： http://stackoverflow.com/a/15972969/816017

这篇关于java.io.IOException异常：收到认证挑战是ICS 4.0.3空的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！