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问java.io.IOException:收到的身份验证质询为空
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Stack Overflow用户

提问于 2012-05-03 20:16:34

回答 3查看 7.1K关注 0票数 3

我需要一个响应码，但它抛出了一个IOException。我不知道怎么回事！

    try
    {
        url = new URL(urlBuilder.toString());
        conn = (HttpURLConnection) url.openConnection();
        conn.setDoInput(true);
        conn.setConnectTimeout(TIME_OUT);
        conn.setRequestMethod(METHOD_GET);
        conn.setRequestProperty("accept", "*/*");
        conn.connect();
        int responseCode = conn.getResponseCode();   //throw IOException:Received authentication challenge is null
        if (responseCode == HTTP_OK)
        {
            inStream = conn.getInputStream();
            response = getResponse(inStream);
        }
        else
        {
            response = "response code："+responseCode;
        }
    } catch (Exception e)
    {
        throw e;
    }
    finally
    {
        conn.disconnect();
    }
    return response;
}

IOException为：

05-03 20:14:01.577: WARN/System.err(1515): java.io.IOException: Received authentication challenge is null
05-03 20:14:01.596: WARN/System.err(1515):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.doRequestInternal(HttpURLConnectionImpl.java:1694)
05-03 20:14:01.577: INFO/QQWeiBo(1515): Received authentication challenge is null
05-03 20:14:01.577: WARN/System.err(1515): java.io.IOException: Received authentication challenge is null
05-03 20:14:01.577: WARN/System.err(1515): java.io.IOException: Received authentication challenge is null
05-03 20:14:01.596: WARN/System.err(1515):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.doRequestInternal(HttpURLConnectionImpl.java:1694)
05-03 20:14:01.596: WARN/System.err(1515):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.doRequest(HttpURLConnectionImpl.java:1649)
05-03 20:14:01.596: WARN/System.err(1515):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:1374)
05-03 20:14:01.596: WARN/System.err(1515):     at com.szy.weibo.service.SyncHttp.httpGet(SyncHttp.java:72)
05-03 20:14:01.596: WARN/System.err(1515):     at com.szy.weibo.service.Weibo.getRequestToken(Weibo.java:45)
05-03 20:14:01.606: WARN/System.err(1515):     at com.szy.weibo.MainActivity.startWebView(MainActivity.java:95)
05-03 20:14:01.606: WARN/System.err(1515):     at com.szy.weibo.MainActivity.authorization(MainActivity.java:83)
05-03 20:14:01.606: WARN/System.err(1515):     at com.szy.weibo.MainActivity$1.onClick(MainActivity.java:71)
05-03 20:14:01.606: WARN/System.err(1515):     at android.view.View.performClick(View.java:2408)
05-03 20:14:01.596: WARN/System.err(1515):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.doRequestInternal(HttpURLConnectionImpl.java:1694)
05-03 20:14:01.596: WARN/System.err(1515):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.doRequest(HttpURLConnectionImpl.java:1649)
05-03 20:14:01.596: WARN/System.err(1515):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:1374)
05-03 20:14:01.596: WARN/System.err(1515):     at com.szy.weibo.service.SyncHttp.httpGet(SyncHttp.java:72)
05-03 20:14:01.596: WARN/System.err(1515):     at com.szy.weibo.service.Weibo.getRequestToken(Weibo.java:45)
05-03 20:14:01.606: WARN/System.err(1515):     at com.szy.weibo.MainActivity.startWebView(MainActivity.java:95)
05-03 20:14:01.606: WARN/System.err(1515):     at com.szy.weibo.MainActivity.authorization(MainActivity.java:83)
05-03 20:14:01.606: WARN/System.err(1515):     at com.szy.weibo.MainActivity$1.onClick(MainActivity.java:71)
05-03 20:14:01.606: WARN/System.err(1515):     at android.view.View.performClick(View.java:2408)
05-03 20:14:01.596: WARN/System.err(1515):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.doRequest(HttpURLConnectionImpl.java:1649)
05-03 20:14:01.596: WARN/System.err(1515):     at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:1374)
05-03 20:14:01.596: WARN/System.err(1515):     at com.szy.weibo.service.SyncHttp.httpGet(SyncHttp.java:72)
05-03 20:14:01.596: WARN/System.err(1515):     at com.szy.weibo.service.Weibo.getRequestToken(Weibo.java:45)
05-03 20:14:01.606: WARN/System.err(1515):     at com.szy.weibo.MainActivity.startWebView(MainActivity.java:95)
05-03 20:14:01.606: WARN/System.err(1515):     at com.szy.weibo.MainActivity.authorization(MainActivity.java:83)
05-03 20:14:01.606: WARN/System.err(1515):     at com.szy.weibo.MainActivity$1.onClick(MainActivity.java:71)
05-03 20:14:01.606: WARN/System.err(1515):     at android.view.View.performClick(View.java:2408)
05-03 20:14:01.606: WARN/System.err(1515):     at android.view.View$PerformClick.run(View.java:8816)
05-03 20:14:01.616: WARN/System.err(1515):     at android.os.Handler.handleCallback(Handler.java:587)
05-03 20:14:01.627: WARN/System.err(1515):     at android.os.Handler.dispatchMessage(Handler.java:92)
05-03 20:14:01.627: WARN/System.err(1515):     at android.os.Looper.loop(Looper.java:123)
05-03 20:14:01.627: WARN/System.err(1515):     at android.app.ActivityThread.main(ActivityThread.java:4627)
05-03 20:14:01.627: WARN/System.err(1515):     at java.lang.reflect.Method.invokeNative(Native Method)
05-03 20:14:01.606: WARN/System.err(1515):     at android.view.View$PerformClick.run(View.java:8816)
05-03 20:14:01.616: WARN/System.err(1515):     at android.os.Handler.handleCallback(Handler.java:587)
05-03 20:14:01.627: WARN/System.err(1515):     at android.os.Handler.dispatchMessage(Handler.java:92)
05-03 20:14:01.627: WARN/System.err(1515):     at android.os.Looper.loop(Looper.java:123)
05-03 20:14:01.627: WARN/System.err(1515):     at android.app.ActivityThread.main(ActivityThread.java:4627)
05-03 20:14:01.627: WARN/System.err(1515):     at java.lang.reflect.Method.invokeNative(Native Method)
05-03 20:14:01.627: WARN/System.err(1515):     at java.lang.reflect.Method.invoke(Method.java:521)
05-03 20:14:01.647: WARN/System.err(1515):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-03 20:14:01.647: WARN/System.err(1515):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-03 20:14:01.647: WARN/System.err(1515):     at dalvik.system.NativeStart.main(Native Method)
05-03 20:14:01.606: WARN/System.err(1515):     at android.view.View$PerformClick.run(View.java:8816)
05-03 20:14:01.616: WARN/System.err(1515):     at android.os.Handler.handleCallback(Handler.java:587)
05-03 20:14:01.627: WARN/System.err(1515):     at android.os.Handler.dispatchMessage(Handler.java:92)
05-03 20:14:01.627: WARN/System.err(1515):     at android.os.Looper.loop(Looper.java:123)
05-03 20:14:01.627: WARN/System.err(1515):     at android.app.ActivityThread.main(ActivityThread.java:4627)
05-03 20:14:01.627: WARN/System.err(1515):     at java.lang.reflect.Method.invokeNative(Native Method)
05-03 20:14:01.627: WARN/System.err(1515):     at java.lang.reflect.Method.invoke(Method.java:521)
05-03 20:14:01.647: WARN/System.err(1515):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-03 20:14:01.647: WARN/System.err(1515):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-03 20:14:01.647: WARN/System.err(1515):     at dalvik.system.NativeStart.main(Native Method)
05-03 20:14:01.627: WARN/System.err(1515):     at java.lang.reflect.Method.invoke(Method.java:521)
05-03 20:14:01.647: WARN/System.err(1515):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-03 20:14:01.647: WARN/System.err(1515):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-03 20:14:01.647: WARN/System.err(1515):     at dalvik.system.NativeStart.main(Native Method)

android

httpurlconnection

回答 3

Stack Overflow用户

发布于 2013-04-12 21:44:03

大多数情况下，您可以通过在连接上再次调用.getResponseCode()来获得响应码。一开始，这让我感到困惑，但如果你读了足够多的HttpURLConnectionImpl，你的眼睛就会停止出血，看到真相……

如果您以这种方式修改您的代码，您将获得响应代码：

try
    {
        url = new URL(urlBuilder.toString());
        conn = (HttpURLConnection) url.openConnection();
        conn.setDoInput(true);
        conn.setConnectTimeout(TIME_OUT);
        conn.setRequestMethod(METHOD_GET);
        conn.setRequestProperty("accept", "*/*");
        conn.connect();
        int responseCode = conn.getResponseCode();   //throw IOException:Received authentication challenge is null
        if (responseCode == HTTP_OK)
        {
            inStream = conn.getInputStream();
            response = getResponse(inStream);
        }
        else
        {
            response = "response code："+responseCode;
        }
    } catch (Exception e)
    {
        // Here you can get the correct response code
        if (conn != null) {
            int responseCodeAfterException = conn.getResponseCode();
            // Handle according to new response code
        }
        // Maybe don't throw e if 401?
        throw e;
    }
    finally
    {
        conn.disconnect();
    }
    return response;
}

参见responseCodeAfterException。

票数 6

Stack Overflow用户

发布于 2012-11-09 20:09:54

如果您可以对服务器端进行更改，则可以确保发送了正确的标头和401状态代码。来自http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.4.2

10.4.2 401未经授权

该请求需要用户身份验证。WWW-Authenticate报头字段(第14.47节)，其中包含适用于所请求资源的质询。客户端可以用适当的授权报头字段重复该请求(第14.8节)。如果请求已经包含授权凭证，则401响应指示对这些凭证的授权已被拒绝。如果401响应包含与先前响应相同的质询，并且用户代理已经至少尝试了一次身份验证，则应向用户呈现响应中给出的实体，因为该实体可能包括相关的诊断信息。HTTP访问验证在"HTTP Authentication: Basic and Digest access Authentication“43中解释。

在我遇到@Chiara描述的情况之前，我使用的代码与@tj-thind相同。然后，我将WWW-Authenticate和Content-Length标头添加到服务器脚本中，现在在使用getResponseCode()时，我可以在不使用IOException的情况下获得正确的401状态代码。

另请参阅IOException: "Received authentication challenge is null" (Apache Harmony/Android)

票数 3

Stack Overflow用户

发布于 2012-06-06 04:19:44

我以前也遇到过这个问题。该异常实际上是由getResponseCode在401事件中抛出的，这是表示未授权的HTTP码。这似乎是HttpURLConnection的安卓实现所独有的。我发现，处理它的最简单的方法就是在catch块中处理401。

catch (java.io.IOException e) {
    //Probably got a 401 here
    response = "response code："+401;
}

票数 0

页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持

原文链接：

https://stackoverflow.com/questions/10431202

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