我有一個連接到服務器的應用程序。我設置了超時時間,將設備與互聯網斷開連接,並嘗試執行發佈請求以查看是否調用了超時,但連接一直持續不斷。這是我的代碼:Android:連接超時不工作(連接永遠等待)
private static final int TIMEOUT_OPS = 3000 ;
private HttpClient mHttpClient;
public String sendToken(String token) throws IOException, AuthenticationException {
JSONArray jsonData = new JSONArray();
jsonData.put(token);
final HttpPost post = prepareJSONRequest(jsonData.toString(), SEND_TOKEN_METHOD);
HttpClient httpClient = getConnection();
Log.i(TAG, "Sending request");
final HttpResponse resp;
try{
resp = httpClient.execute(post);
}catch(Exception e){
e.printStackTrace();
return null;
}
Log.i(TAG, "Got response");
...
}
private HttpPost prepareJSONRequest(String rest_data, String method) throws AssertionError {
AbstractHttpEntity entity = null;
try {
final ArrayList<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair(KEY_PARAM_METHOD, method));
params.add(new BasicNameValuePair(KEY_PARAM_INPUT_TYPE, JSON));
params.add(new BasicNameValuePair(KEY_PARAM_RESPONSE_TYPE, JSON));
params.add(new BasicNameValuePair("rest_data", rest_data));
entity = new UrlEncodedFormEntity(params, HTTP.UTF_8);
final HttpPost post = new HttpPost(mServer);
post.addHeader(entity.getContentType());
post.setEntity(entity);
return post;
} catch (final UnsupportedEncodingException e) {
// this should never happen.
throw new AssertionError(e);
}
}
private HttpClient getConnection() {
if (mHttpClient == null) {
// registers schemes for both http and https
HttpParams params = new BasicHttpParams();
HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
HttpProtocolParams.setContentCharset(params, HTTP.UTF_8);
HttpProtocolParams.setUseExpectContinue(params, false);
HttpConnectionParams.setConnectionTimeout(params, TIMEOUT_OPS);
HttpConnectionParams.setSoTimeout(params, TIMEOUT_OPS);
ConnManagerParams.setTimeout(params, TIMEOUT_OPS);
SchemeRegistry registry = new SchemeRegistry();
registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
final SSLSocketFactory sslSocketFactory = SSLSocketFactory.getSocketFactory();
sslSocketFactory.setHostnameVerifier(SSLSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
if (!mNoCertValidation)
registry.register(new Scheme("https", sslSocketFactory, 443));
else
registry.register(new Scheme("https", new EasySSLSocketFactory(), 443));
ThreadSafeClientConnManager manager = new ThreadSafeClientConnManager(params, registry);
mHttpClient = new DefaultHttpClient(manager, params);
}
return mHttpClient;
}
如果我執行此代碼,我的日誌顯示「發送請求」,但不打印異常或「有迴應」。爲什麼它不起作用?
您是否在Manifest文件中設置了Internet的權限? – vandzi
如果您沒有Internet,則DNS請求將失敗,但無法控制DNS超時。最終你應該得到一個UnknownHostException,但這可能需要幾分鐘的時間。在這種情況下,最好的做法是在發出HTTP請求的同時,在單獨的線程中啓動一個定時器。如果定時器在HTTP請求完成之前關閉,則可以中止HTTP請求。 –
謝謝大衛,我會這樣做。 –