On Fri, 2007-10-26 at 14:31 +0200, [EMAIL PROTECTED]
wrote:
> Oleg,
>
> yes, I want to implement an upload timeout. I immediately tried
> your suggestion, but it also hangs. Actually, both a call to the
> ConnectionManager's shutdown() method and the call to HttpMethod's
> abort() method eventually will invoke closeSocketAndStreams() of
> HttpConnection. This method in turn invokes close() on the socket's
> output stream but will block infinitely as the socket is still
> open, so the socket should probably be closed first.
I see the problem.
> Do you know
> any other workarounds?
>
No, actually, I do not. HttpClient 4.0 provides a means to forcibly
shutdown a connection among many improvements. I do not know of a way to
introduce similar functionality to HttpClient 3.x without forking its
code.
Sorry.
Oleg
> Thanks,
> Stephan
>
> ----- Original Message -----
> From: Oleg Kalnichevski <[EMAIL PROTECTED]>
> Date: Friday, October 26, 2007 12:30 pm
> Subject: Re: Cannot shut down the connection manager
> To: HttpClient User Discussion <httpclient-user@jakarta.apache.org>
>
> >
> > On Fri, 2007-10-26 at 11:26 +0200, [EMAIL PROTECTED]
> > wrote:
> > > Dear httpclient-team,
> > >
> > > I want to implement a http client which is "robust" with respect
> > to dumb
> > > servers, i.e. I want it to automatically shut down if a server
> > does not
> > > accept data of a post request for say 10 seconds. I've tried to
> > set the
> > > socket timeout in the http client, but that does not work - the
> > client> just hangs when it writes to the output stream. Then I've
> > created a timer
> > > task to call the shutdown() method of the connection manager, but
> > that> doesn't work also - again the client hangs. Finally, I edited
> > the> closeSocketAndStreams() method in
> > org.apache.commons.httpclient.HttpConnection> to first close the
> > socket and then close the streams (currently it's the
> > > other way round). If I do this, the shutdown() method works, but
> > of course,
> > > I'd rather not edit httpclient's source code. Below I've attached
> > the source
> > > I've used for testing this (tried Java 1.4 and 1.5).
> > >
> > > Actually, I'm not even sure whether my approach to solve the
> > above problem
> > > is sensible (e.g. is the connection manager thread safe?), so any
> > help would
> > > be highly appreciated.
> > >
> >
> > Essentially you want to enforce an upload timeout, don't you? If so,
> > socket timeout will be of little use as it only affects read
> > operations.Create a timer task and have it call HttpMethod#abort()
> > when the timeout
> > condition is met.
> >
> > Hope this helps
> >
> > Oleg
> >
> >
> > > Thank you,
> > > Stephan
> > >
> > >
> > > // a very dumb server
> > > public class HttpServer {
> > > public static void main(String [] args) {
> > > ServerSocket serverSocket = null;
> > > try {
> > > serverSocket = new ServerSocket(9999);
> > > while (true)
> > > serverSocket.accept();
> > > }
> > > catch (IOException ex) {
> > > System.out.println("caught " + ex);
> > > }
> > > }
> > > }
> > >
> > > // a request entity that writes data as long as it can
> > > public class MyRequestEntity implements RequestEntity
> > > {
> > > public void writeRequest(OutputStream out) throws IOException {
> > > for (int i = 0; true; ++i) {
> > > System.out.println(i);
> > > out.write(128); // this is the place where the client hangs
> > > }
> > > }
> > > (...)
> > > public long getContentLength() {
> > > return 10000000;
> > > }
> > > }
> > >
> > > public class ShutDownTask extends TimerTask
> > > {
> > > private SimpleHttpConnectionManager connectionManager;
> > > public ShutDownTask(SimpleHttpConnectionManager
> > connectionManager) {
> > > this.connectionManager = connectionManager;
> > > }
> > >
> > > public void run() {
> > > connectionManager.shutdown();
> > > }
> > > }
> > >
> > > public class MyHttpClient {
> > > public static void main(String [] args)
> > > {
> > > PostMethod method = new PostMethod("http://localhost:9999";);
> > > method.getParams().setParameter(HttpMethodParams.SO_TIMEOUT,
> > new Integer(10000)); // setting this timeout does not help
> > >
> > > method.setRequestEntity(new MyRequestEntity());
> > > SimpleHttpConnectionManager connectionManager = new
> > SimpleHttpConnectionManager(true);>
> > > Timer timer = new Timer();
> > > timer.schedule(new ShutDownTask(connectionManager), 10000);
> > > try {
> > > int statusCode = new
> > HttpClient(connectionManager).executeMethod(method);>
> > System.out.println("got status code " + statusCode);
> > > }
> > > catch (IOException ex) {
> > > System.out.println("caught " + ex);
> > > }
> > > finally {
> > > method.releaseConnection();
> > > }
> > > }
> > > }
> > >
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> >
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