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POPreventing HttpClient 4 from following redirect
 

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    <p>I'm connecting to my AppEngine application using the Apache HttpComponents library. In order to authenticate my users, I need to pass an authentication token along to the application's login address (<a href="http://myapp.appspot.com/_ah/login?auth=.." rel="noreferrer">http://myapp.appspot.com/_ah/login?auth=..</a>.) and grab a cookie from the header of the response. However, the login page responds with a redirect status code, and I don't know how to stop HttpClient from following the redirect, thus thwarting me from intercepting the cookie.</p> <p>Fwiw, the actual method I use to send the request is below.</p> <pre><code>private void execute(HttpClient client, HttpRequestBase method) { // Set up an error handler BasicHttpResponse errorResponse = new BasicHttpResponse( new ProtocolVersion("HTTP_ERROR", 1, 1), 500, "ERROR"); try { // Call HttpClient execute client.execute(method, this.responseHandler); } catch (Exception e) { errorResponse.setReasonPhrase(e.getMessage()); try { this.responseHandler.handleResponse(errorResponse); } catch (Exception ex) { // log and/or handle } } } </code></pre> <p>How would I stop the client from following the redirect?</p> <p>Thanks.</p> <p><strong>Update</strong>:</p> <p>As per the solution below, I did the following after creating a <code>DefaultHttpClient client</code> (and before passing it to the <code>execute</code> method):</p> <pre><code>if (!this.followRedirect) { client.setRedirectHandler(new RedirectHandler() { public URI getLocationURI(HttpResponse response, HttpContext context) throws ProtocolException { return null; } public boolean isRedirectRequested(HttpResponse response, HttpContext context) { return false; } }); } </code></pre> <p>More verbose than it seems it needs to be, but not as difficult as I thought.</p>
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    1. CONote that once you have set a RedirectHandler that remains in effect for all subsequent Requests - not just the Request of interest here. So if you are are going on to issue further Requests which may require redirection to execute properly you will want to do a client.setRedirectHandler(new DefaultRedirectHandler()) after the execute.
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