AsyncTask HttpPost 在 3G 上执行失败，但在 Wifi 上工作 [英] AsyncTask HttpPost execute fails on 3G, but works on Wifi
问题描述
我需要将一些字符串的 Http post 发送到 Web 服务.我正在使用 KSoap.
I need to do a Http post of some strings to a web service. I am using KSoap.
@Override
protected JSONObject doInBackground(JSONObject... params) {
String result;
HttpParams httpParameters = new BasicHttpParams();
// Set the timeout in milliseconds until a connection is established.
// The default value is zero, that means the timeout is not used.
int timeoutConnection = 30000;
HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
// Set the default socket timeout (SO_TIMEOUT)
// in milliseconds which is the timeout for waiting for data.
int timeoutSocket = 50000;
HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
HttpClient httpclient = new DefaultHttpClient(httpParameters);
setupClient(httpclient);
//HttpURLConnection httpclient = new HttpURLConnection(_url);
Log.d(TAG, "Posting to ["+_url+"]");
HttpPost postdata = new HttpPost(_url);
...set up parameters
ResponseHandler<String> handler = new BasicResponseHandler();
Calendar c = Calendar.getInstance();
long start = c.getTimeInMillis();
try {
Log.d(TAG, "Starting post data call ["+_url+"]");
result = httpclient.execute(postdata,handler);
c = Calendar.getInstance();
long total = c.getTimeInMillis() - start;
Log.d(TAG, "Finished post data call ["+result+"] in ["+total+"] millis");
}catch(HttpResponseException e)
{
c = Calendar.getInstance();
long total = c.getTimeInMillis() - start;
Log.e(TAG, "HttpResponseException: ["+total+"] millis. There was a problem communicating: " + e.getMessage());
return null;
}catch (ClientProtocolException e) {
Log.e(TAG, "ClientProtocolException There was a problem getting to the service: " + e.getMessage());
return null;
} catch(SocketTimeoutException e){
Log.e(TAG, "SocketTimeoutException There was a problem connecting: " + e.getMessage());
return null;
} catch (IOException e) {
Log.e(TAG, "IOException There was a problem reading the data: " + e.getMessage());
return null;
}
catch(Exception e)
{
Log.e(TAG, "Exception An error occurred: " + e.toString());
return null;
}
httpclient.getConnectionManager().shutdown();
JSONObject resp = null;
try {
resp = new JSONObject(result);
} catch (JSONException e) {
resp = null;
e.printStackTrace();
}
Log.i(TAG, result.toString());
return resp;
}
所以当我使用 Wifi 连接时这很好用，但是使用 3G 在 16 - 18 秒内失败并抛出 HttpResponseException.
So this works fine when I use Wifi to connect, but using 3G is fails in 16 - 18 seconds throwing a HttpResponseException.
我无法相信是 DefaultHttpClient 运行异步是问题所在，因为它也应该在 Wifi 上抛出错误.
I cannot believe that it's the DefaultHttpClient running async that is the issue, because then it should throw the error on Wifi as well.
编辑
Web 服务是用 C# 编写的，并使用 JSON 响应.
EDIT
The web services are written in C#, and use JSON responses.
这里要求的是 logcat，在 18 秒内给出 HttpResponseException，正如我在原始问题中所说:
As requested here is the logcat, giving the HttpResponseException in 18 seconds, as I said in the original question:
07-22 11:13:04.678: D/ProgressBar(26524): setProgress = 0<br/>
07-22 11:13:04.678: D/ProgressBar(26524): setProgress = 0, fromUser = false<br/>
07-22 11:13:04.678: D/ProgressBar(26524): mProgress = 0mIndeterminate = false, mMin = 0, mMax = 10000<br/>
07-22 11:13:31.968: D/GpsLocation(26524): Got location<br/>
07-22 11:13:32.018: D/WebService(26524): BASE ADDRESS [http://[SERVICEURL]]<br/>
07-22 11:13:32.023: D/ProgressBar(26524): setProgress = 0<br/>
07-22 11:13:32.023: D/ProgressBar(26524): setProgress = 0, fromUser = false<br/>
07-22 11:13:32.023: D/ProgressBar(26524): mProgress = 0mIndeterminate = false, mMin = 0, mMax = 10000<br/>
07-22 11:13:32.048: D/HttpPostWebServiceTask(26524): Posting to [http://[SERVICEURL]/Authentication/Authenticate]<br/>
07-22 11:13:32.053: D/HttpPostWebServiceTask(26524): Starting post data call [http://[SERVICEURL]/Authentication/Authenticate]<br/>
07-22 11:13:47.758: D/dalvikvm(26524): GC_CONCURRENT freed 258K, 17% free 8062K/9671K, paused 22ms+25ms, total 157ms<br/>
**07-22 11:13:50.728: E/HttpPostWebServiceTask(26524): HttpResponseException: [18671] millis. There was a problem communicating: Gateway Timeout**<br/>
07-22 11:13:50.778: D/GOT RESPONSE(26524): NULL RESPONSE FROM SERVER<br/>
07-22 11:13:50.778: E/HttpPostWebServiceTask(26524): Error invoking command: null<br/>
07-22 11:13:50.783: W/System.err(26524): java.lang.NullPointerException<br/>
07-22 11:13:50.793: W/System.err(26524): at com.app.webservices.WebService.checkValidResponse(WebService.java:82)<br/>
07-22 11:13:50.793: W/System.err(26524): at com.app.webservices.WebService.access$0(WebService.java:76)<br/>
07-22 11:13:50.793: W/System.err(26524): at com.app.webservices.WebService$1.execute(WebService.java:120)<br/>
07-22 11:13:50.793: W/System.err(26524): at com.app.webservices.WebService$1.execute(WebService.java:1)<br/>
07-22 11:13:50.793: W/System.err(26524): at com.blm.android.webservice.HttpPostWebServiceTask.onPostExecute(HttpPostWebServiceTask.java:226)<br/>
07-22 11:13:50.793: W/System.err(26524): at com.blm.android.webservice.HttpPostWebServiceTask.onPostExecute(HttpPostWebServiceTask.java:1)<br/>
07-22 11:13:50.798: W/System.err(26524): at android.os.AsyncTask.finish(AsyncTask.java:631)<br/>
07-22 11:13:50.798: W/System.err(26524): at android.os.AsyncTask.access$600(AsyncTask.java:177)<br/>
07-22 11:13:50.803: W/System.err(26524): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)<br/>
07-22 11:13:50.803: W/System.err(26524): at android.os.Handler.dispatchMessage(Handler.java:99)<br/>
07-22 11:13:50.803: W/System.err(26524): at android.os.Looper.loop(Looper.java:137)<br/>
07-22 11:13:50.803: W/System.err(26524): at android.app.ActivityThread.main(ActivityThread.java:4947)<br/>
07-22 11:13:50.803: W/System.err(26524): at java.lang.reflect.Method.invokeNative(Native Method)<br/>
07-22 11:13:50.803: W/System.err(26524): at java.lang.reflect.Method.invoke(Method.java:511)<br/>
07-22 11:13:50.803: W/System.err(26524): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)<br/>
07-22 11:13:50.808: W/System.err(26524): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)<br/>
07-22 11:13:50.808: W/System.err(26524): at dalvik.system.NativeStart.main(Native Method)<br/>
结束编辑
这是我应该走的路吗:http://www.vogella.com/articles/AndroidNetworking/article.html
那么我如何使用这种方法发布数据实体?
END EDIT
Is this the way I should go: http://www.vogella.com/articles/AndroidNetworking/article.html
Then how do I post data entities using this method?
推荐答案
您可以尝试通过手机的 Web 浏览器连接到您的服务器，以查看问题是在您的应用程序内还是 3G 问题正在解决/连接到您服务器的地址.
You could try to connect to your server via the web browser of your phone to see if the problem is within your application or if the problem is a 3G problem resolving/connecting to the address of your server.
我的猜测是您将无法通过网络浏览器进行连接.
My guess is that you won't be able to connect either via a web browser.
您的网络服务托管在哪里?它应该可以从外部网络访问吗?如果服务器在同一网络中，您也许可以通过 wifi 连接到您的服务器.
Where is hosted your web service? Should it be accessible from an external network ? You may be able to connect to your server via wifi if the server is in the same network.
这篇关于AsyncTask HttpPost 在 3G 上执行失败，但在 Wifi 上工作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IT屋！
