CircularRedirectException encountered when using a proxy, but not when reaching
the target directly
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Key: HTTPCLIENT-852
URL: https://issues.apache.org/jira/browse/HTTPCLIENT-852
Project: HttpComponents HttpClient
Issue Type: Bug
Components: HttpClient, HttpConn
Affects Versions: 4.0 Beta 2
Environment: Proxy: tinyproxy/1.6.4
Reporter: Charles Fr Rey
A CircularRedirectException is encountered when using a proxy (tinyproxy on a
remote machine), whereas everything is fine when using no proxy. The target is
a URL such as http://www.seoconsultants.com/w3c/status-codes/301.asp which has
a 301 redirection.
The issue can be fixed by using ALLOW_CIRCULAR_REDIRECTS set to true (client
params), but I can't consider this a "real" fix.
Here is a snippet of code that exemplifies the problem (use your own proxy):
---
String proxyHost = "xyz.webfactional.com";
int proxyPort = 7295;
DefaultHttpClient httpclient = new DefaultHttpClient();
// without a proxy it's OK!
httpclient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY,
new HttpHost(proxyHost, proxyPort, "http"));
HttpParams params = httpclient.getParams();
HttpClientParams.setRedirecting(params, true);
HttpProtocolParams.setUserAgent(params,
"Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.0.10)
Gecko/2009042315 Firefox/3.0.10");
// OK, this fixes the problem, but at what cost / other problems ?
//httpclient.getParams().setParameter(ClientPNames.ALLOW_CIRCULAR_REDIRECTS,
true);
String url = "http://www.seoconsultants.com/w3c/status-codes/301.asp";;
HttpUriRequest request;
HttpResponse response;
request = new HttpGet(url);
System.out.println("request = " + request.getRequestLine());
response = httpclient.execute(request);
System.out.println("status = " + response.getStatusLine());
System.out.println("headers = " + Arrays.asList(response.getAllHeaders()));
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