关于http请求卡死的处理

大家在做http请求时可能会遇到这种情况，明明设置了connetTimeOut和SocketTimeOut可是在实际使用的过程中却还是无法在设置的时间内得到响应结果（正确的或者异常的）,请求就一直处于卡死状态，这种情况在手机端会比较常见（特别是网络环境不佳的时候），具体原因暂时不知，但我们可以对这种情况做下处理，这样不至于导致app处于一直等待的卡死状态。使用FutureTask对请求做定时处理，在限定时间内返回返回结果，不管http请求是否完成。一般我们可以把FutureTask的时间限定的长一些，一般足以让http请求正常返回就行。下面上代码

public static HttpResult proc(HttpClient client, HttpUriRequest req, Charset charset, int count) throws Exception{ExecutorService executor = Executors.newSingleThreadExecutor();        FutureTask<HttpResponse> futureTask = new FutureTask<HttpResponse>(new Callable<HttpResponse>() {// 使用Callable接口作为构造参数public HttpResponse call() {HttpResponse response = null;try {response = client.execute(req);} catch (Exception e) {}return response;}});executor.execute(futureTask);        HttpResponse response = null;try {// 这里是限定2分钟内response = futureTask.get(120000, TimeUnit.MILLISECONDS);} catch (TimeoutException e) {futureTask.cancel(true);} finally {executor.shutdown();}if(response == null) {return new HttpResult(response, req);}if (response.getStatusLine().getStatusCode() == 302 || response.getStatusLine().getStatusCode() == 301){Header header = response.getFirstHeader("Location");if (header != null){String location = header.getValue();System.out.println("location:" + location);HttpGet get = new HttpGet(location);return proc(client, get, StandardCharsets.UTF_8, count);}return new HttpResult(response, req, charset);}HttpResult rh = new HttpResult(response, req, charset);return rh;}