Android IOException与http。。。但它仍然有效
我正在使用httpclient与web服务器通信，但偶尔会出现IOException，但奇怪的是，该命令仍然会发送到web服务器。事实上，我甚至通常会从服务器返回一个有效的数据响应以及IOException。我应该如何对待这些例外 这是我的代码，以防我做错了什么：Android IOException与http。。。但它仍然有效,android,httpclient,Android,Httpclient,我正在使用httpclient与web服务器通信，但偶尔会出现IOException，但奇怪的是，该命令仍然会发送到web服务器。事实上，我甚至通常会从服务器返回一个有效的数据响应以及IOException。我应该如何对待这些例外 这是我的代码，以防我做错了什么： DefaultHttpClient client = new DefaultHttpClient(); CookieSyncManager.getInstance().startSync(); HttpContext localCon
DefaultHttpClient client = new DefaultHttpClient();
CookieSyncManager.getInstance().startSync();
HttpContext localContext = new BasicHttpContext();
String password = db.getWebPassword();
String username = db.getWebUsername();
HttpGet httpGet = new HttpGet(url);
final HttpParams httpParams = client.getParams();
// try playing with the timesouts, but I don't think I know what I am doing...
HttpConnectionParams.setConnectionTimeout(httpParams, 5000);
HttpConnectionParams.setSoTimeout(httpParams, 5000);
Integer responseCode = 0;
try
{
HttpResponse execute;
UsernamePasswordCredentials creds = new UsernamePasswordCredentials(username, password);
client.getCredentialsProvider().setCredentials(new AuthScope(AuthScope.ANY_HOST, AuthScope.ANY_PORT), creds);
execute = client.execute(httpGet);
HttpEntity entity = execute.getEntity(); // often catches an IOException here
Log.d(MY_DEBUG_TAG, "Execute complete: " + entity.toString());
responseCode = execute.getStatusLine().getStatusCode();
Log.d(MY_DEBUG_TAG, "Response Code: " + responseCode);
if (responseCode == 401)
{
response = "ERROR";
Toast.ShowToast("Username/Password error.", pa);
}
InputStream content = execute.getEntity().getContent();
Log.d(MY_DEBUG_TAG, "Reading response");
BufferedReader buffer = new BufferedReader(
new InputStreamReader(content));
String s = "";
while ((s = buffer.readLine()) != null)
{
response += s;
}
// remove all html if possible
response = android.text.Html.fromHtml(response).toString();
Log.d(MY_DEBUG_TAG, "Response = " + response);
}
catch (ClientProtocolException e)
{
Log.e(MY_ERROR_TAG, "ClientProtocolException: " + e.getMessage());
Toast.ShowToast("Error connecting to server.", pa);
}
catch (IOException e)
{
Log.e(MY_ERROR_TAG, "IOException: " + e.getMessage());
Toast.ShowToast("Error connecting to server.", pa);
}
java.net.SocketTimeoutException
at org.apache.harmony.luni.net.PlainSocketImpl.read(PlainSocketImpl.java:564)
at org.apache.harmony.luni.net.SocketInputStream.read(SocketInputStream.java:88)
at org.apache.http.impl.io.AbstractSessionInputBuffer.fillBuffer(AbstractSessionInputBuffer.java:103)
at org.apache.http.impl.io.AbstractSessionInputBuffer.readLine(AbstractSessionInputBuffer.java:191)
at org.apache.http.impl.conn.DefaultResponseParser.parseHead(DefaultResponseParser.java:82)
at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:174)
at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:179)
at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:235)
at org.apache.http.impl.conn.AbstractClientConnAdapter.receiveResponseHeader(AbstractClientConnAdapter.java:259)
at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:279)
at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:121)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:410)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
at com.PowerHomeConnectorForAndroid.Network$GetHttpData.doInBackground(Network.java:215)
at com.PowerHomeConnectorForAndroid.Network$GetHttpData.doInBackground(Network.java:1)
at android.os.AsyncTask$2.call(AsyncTask.java:185)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
at java.util.concurrent.FutureTask.run(FutureTask.java:137)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
at java.lang.Thread.run(Thread.java:1096)
IOException x Good
1 http-alt 0 70.165.69.220 192.168.1.110 TCP 66 20180 > http-alt [SYN] Seq=0 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1 x 31 http-alt 0 70.165.69.220 192.168.1.110 TCP 66 52220 > http-alt [SYN] Seq=0 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1
2 20180 0.000039 192.168.1.110 70.165.69.220 TCP 66 http-alt > 20180 [SYN, ACK] Seq=0 Ack=1 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1 x 32 52220 0.000043 192.168.1.110 70.165.69.220 TCP 66 http-alt > 52220 [SYN, ACK] Seq=0 Ack=1 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1
3 http-alt 0.05784 70.165.69.220 192.168.1.110 TCP 60 20180 > http-alt [ACK] Seq=1 Ack=1 Win=65536 Len=0 x 33 http-alt 0.22131 70.165.69.220 192.168.1.110 TCP 60 52220 > http-alt [ACK] Seq=1 Ack=1 Win=65536 Len=0
4 http-alt 0.153949 70.165.69.220 192.168.1.110 HTTP 196 GET /ph-cgi/clogin HTTP/1.1 x 34 http-alt 0.350917 70.165.69.220 192.168.1.110 HTTP 196 GET /ph-cgi/clogin HTTP/1.1
5 20180 0.161902 192.168.1.110 70.165.69.220 HTTP 2967 HTTP/1.0 200 OK (text/html) x 35 52220 0.3841 192.168.1.110 70.165.69.220 HTTP 2967 HTTP/1.0 200 OK (text/html)
6 20180 0.161992 192.168.1.110 70.165.69.220 TCP 54 http-alt > 20180 [FIN, ACK] Seq=2914 Ack=143 Win=65536 Len=0 x 36 52220 0.38419 192.168.1.110 70.165.69.220 TCP 54 http-alt > 52220 [FIN, ACK] Seq=2914 Ack=143 Win=65536 Len=0
7 http-alt 0.209671 70.165.69.220 192.168.1.110 TCP 60 20180 > http-alt [ACK] Seq=143 Ack=1461 Win=65536 Len=0 x 37 http-alt 0.614323 70.165.69.220 192.168.1.110 TCP 60 52220 > http-alt [ACK] Seq=143 Ack=1461 Win=65536 Len=0
8 http-alt 0.253024 70.165.69.220 192.168.1.110 TCP 60 20180 > http-alt [ACK] Seq=143 Ack=2915 Win=64000 Len=0 x 38 http-alt 0.614456 70.165.69.220 192.168.1.110 TCP 60 52220 > http-alt [ACK] Seq=143 Ack=2915 Win=64000 Len=0
9 http-alt 0.373148 70.165.69.220 192.168.1.110 TCP 60 20180 > http-alt [FIN, ACK] Seq=143 Ack=2915 Win=64000 Len=0 x 39 http-alt 0.746923 70.165.69.220 192.168.1.110 TCP 60 52220 > http-alt [FIN, ACK] Seq=143 Ack=2915 Win=64000 Len=0
10 20180 0.373172 192.168.1.110 70.165.69.220 TCP 54 http-alt > 20180 [ACK] Seq=2915 Ack=144 Win=65536 Len=0 x 40 52220 0.746944 192.168.1.110 70.165.69.220 TCP 54 http-alt > 52220 [ACK] Seq=2915 Ack=144 Win=65536 Len=0
11 http-alt 0.38402 70.165.69.220 192.168.1.110 TCP 66 53091 > http-alt [SYN] Seq=0 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1 x 41 http-alt 0.762482 70.165.69.220 192.168.1.110 TCP 66 64314 > http-alt [SYN] Seq=0 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1
12 53091 0.384069 192.168.1.110 70.165.69.220 TCP 66 http-alt > 53091 [SYN, ACK] Seq=0 Ack=1 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1 x 42 64314 0.762517 192.168.1.110 70.165.69.220 TCP 66 http-alt > 64314 [SYN, ACK] Seq=0 Ack=1 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1
13 http-alt 0.425956 70.165.69.220 192.168.1.110 TCP 60 53091 > http-alt [ACK] Seq=1 Ack=1 Win=65536 Len=0 x 43 http-alt 1.015043 70.165.69.220 192.168.1.110 TCP 60 64314 > http-alt [ACK] Seq=1 Ack=1 Win=65536 Len=0
14 http-alt 0.511349 70.165.69.220 192.168.1.110 TCP 349 [TCP segment of a reassembled PDU] x 44 http-alt 1.064351 70.165.69.220 192.168.1.110 TCP 349 [TCP segment of a reassembled PDU]
15 53091 0.704456 192.168.1.110 70.165.69.220 TCP 54 http-alt > 53091 [ACK] Seq=1 Ack=296 Win=65536 Len=0 x 45 64314 1.263922 192.168.1.110 70.165.69.220 TCP 54 http-alt > 64314 [ACK] Seq=1 Ack=296 Win=65536 Len=0
16 http-alt 2.562688 70.165.69.220 192.168.1.110 HTTP 99 POST /ph-cgi/cauth HTTP/1.1 (application/x-www-form-urlencoded) x 46 http-alt 3.088689 70.165.69.220 192.168.1.110 HTTP 99 POST /ph-cgi/cauth HTTP/1.1 (application/x-www-form-urlencoded)
17 53091 2.567888 192.168.1.110 70.165.69.220 HTTP 355 HTTP/1.0 200 OK (text/html) x 47 64314 3.093318 192.168.1.110 70.165.69.220 HTTP 355 HTTP/1.0 200 OK (text/html)
18 53091 2.568447 192.168.1.110 70.165.69.220 TCP 54 http-alt > 53091 [FIN, ACK] Seq=302 Ack=341 Win=65536 Len=0 x 48 64314 3.093858 192.168.1.110 70.165.69.220 TCP 54 http-alt > 64314 [FIN, ACK] Seq=302 Ack=341 Win=65536 Len=0
19 http-alt 2.612071 70.165.69.220 192.168.1.110 TCP 60 53091 > http-alt [ACK] Seq=341 Ack=303 Win=65280 Len=0 x 49 http-alt 3.313276 70.165.69.220 192.168.1.110 TCP 60 64314 > http-alt [ACK] Seq=341 Ack=303 Win=65280 Len=0
20 http-alt 2.665338 70.165.69.220 192.168.1.110 TCP 66 34654 > http-alt [SYN] Seq=0 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1 x 50 http-alt 3.410808 70.165.69.220 192.168.1.110 TCP 66 33703 > http-alt [SYN] Seq=0 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1
21 34654 2.665385 192.168.1.110 70.165.69.220 TCP 66 http-alt > 34654 [SYN, ACK] Seq=0 Ack=1 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1 x 51 33703 3.410851 192.168.1.110 70.165.69.220 TCP 66 http-alt > 33703 [SYN, ACK] Seq=0 Ack=1 Win=8192 Len=0 MSS=1460 WS=256 SACK_PERM=1
22 http-alt 2.665487 70.165.69.220 192.168.1.110 TCP 60 53091 > http-alt [FIN, ACK] Seq=341 Ack=303 Win=65280 Len=0 x 52 http-alt 3.41086 70.165.69.220 192.168.1.110 TCP 60 64314 > http-alt [FIN, ACK] Seq=341 Ack=303 Win=65280 Len=0
23 53091 2.6655 192.168.1.110 70.165.69.220 TCP 54 http-alt > 53091 [ACK] Seq=303 Ack=342 Win=65536 Len=0 x 53 64314 3.41087 192.168.1.110 70.165.69.220 TCP 54 http-alt > 64314 [ACK] Seq=303 Ack=342 Win=65536 Len=0
24 http-alt 2.709857 70.165.69.220 192.168.1.110 TCP 60 34654 > http-alt [ACK] Seq=1 Ack=1 Win=65536 Len=0 x 54 http-alt 3.715974 70.165.69.220 192.168.1.110 TCP 60 33703 > http-alt [ACK] Seq=1 Ack=1 Win=65536 Len=0
25 http-alt 2.916243 70.165.69.220 192.168.1.110 HTTP 308 GET /ph-cgi/eval?formula=ph_macro%28%27TESTING%27%29 HTTP/1.1 x 55 http-alt 3.830971 70.165.69.220 192.168.1.110 HTTP 308 GET /ph-cgi/eval?formula=ph_macro%28%27TESTING%27%29 HTTP/1.1
26 34654 3.114457 192.168.1.110 70.165.69.220 TCP 54 http-alt > 34654 [ACK] Seq=1 Ack=255 Win=65536 Len=0 x 56 33703 3.858623 192.168.1.110 70.165.69.220 HTTP 153 HTTP/1.0 200 OK (text/html)
27 http-alt 11.023287 70.165.69.220 192.168.1.110 TCP 60 34654 > http-alt [FIN, ACK] Seq=255 Ack=1 Win=65536 Len=0 x 57 33703 3.858729 192.168.1.110 70.165.69.220 TCP 54 http-alt > 33703 [FIN, ACK] Seq=100 Ack=255 Win=65536 Len=0
28 34654 11.023305 192.168.1.110 70.165.69.220 TCP 54 http-alt > 34654 [ACK] Seq=1 Ack=256 Win=65536 Len=0 x 58 http-alt 4.114668 70.165.69.220 192.168.1.110 TCP 60 33703 > http-alt [ACK] Seq=255 Ack=101 Win=65536 Len=0
29 34654 34.882577 192.168.1.110 70.165.69.220 TCP 54 http-alt > 34654 [FIN, ACK] Seq=1 Ack=256 Win=65536 Len=0 x 59 http-alt 4.153392 70.165.69.220 192.168.1.110 TCP 60 33703 > http-alt [FIN, ACK] Seq=255 Ack=101 Win=65536 Len=0
30 http-alt 34.926041 70.165.69.220 192.168.1.110 TCP 60 34654 > http-alt [ACK] Seq=256 Ack=2 Win=65536 Len=0 x 60 33703 4.153402 192.168.1.110 70.165.69.220 TCP 54 http-alt > 33703 [ACK] Seq=101 Ack=256 Win=65536 Len=0
所以，也许我应该忽略SocketTimeoutException？？？听起来有点危险……我想问题出在这一行的插座超时：
HttpConnectionParams.setSoTimeout(httpParams, 5000);
SoTimeoutHttpRequestRetryHandler retryHandler = new HttpRequestRetryHandler(){
@Override
public boolean retryRequest(IOException exception,
int executionCount, HttpContext context) {
if (executionCount >= 5) {
Log.e("Retry Limit", "Retry #: " + executionCount);
return false;
}
if(exception instanceof java.net.SocketTimeoutException){
Log.e("(SocketTimeoutException)", "Retry #: " + executionCount);
return true;
}
if(exception instanceof java.net.SocketException){
Log.e("(SocketException)", "Retry #: " + executionCount);
return true;
}
if(exception instanceof ObjectStreamException){
Log.e("(ObjectStreamException)", "Retry #: " + executionCount);
return true;
}
if(exception instanceof ProtocolException){
Log.e("(ProtocolException)", "Retry #: " + executionCount);
return true;
}
if(exception instanceof SSLException){
Log.e("(SSLException)", "Retry #: " + executionCount);
return true;
}
if(exception instanceof SyncFailedException){
Log.e("(SyncFailedException)", "Retry #: " + executionCount);
return true;
}
if(exception instanceof UTFDataFormatException){
Log.e("(UTFDataFormatException)", "Retry #: " + executionCount);
return true;
}
return false;
}
};
client.setHttpRequestRetryHandler(retryHandler);
SocketTimeOut、SocketExceptionIOExceptioncatch (IOException e)
{
SystemClock.sleep(1500);
Log.e(MY_ERROR_TAG, "IOException: " + e.getMessage());
Toast.ShowToast("Error connecting to server.", pa);
/*RETRY THE REQUEST MANUALLY*/
}
由于错误发生在execute.getEntity（）行，因此我认为没有必要在该行之后编写代码。无论如何，谢谢你的帮助。代码的其余部分已经添加。我希望有帮助！：）大家都去哪了？我一直在研究这个问题，我不知道应该做些什么来避免出现这个错误。也许我做错了？好吧，我将把这件事留着，希望有人会来看看，并有一个好的答案。同时，我已经在我的应用程序中禁用了此错误的报告。也许我发现了一个安卓bug？？？