There's probably a better way, but in the Bixo code I added a
RedirectHandler that records the last permanent redirect (as well as
total number of redirects):
// Keys used to access data in the Http execution context.
private static final String PERM_REDIRECT_CONTEXT_KEY = "perm-
redirect";
private static final String REDIRECT_COUNT_CONTEXT_KEY = "redirect-
count";
private static class MyRedirectHandler extends
DefaultRedirectHandler {
@Override
public URI getLocationURI(HttpResponse response, HttpContext
context) throws ProtocolException {
URI result = super.getLocationURI(response, context);
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY) {
context.setAttribute(PERM_REDIRECT_CONTEXT_KEY, result);
}
// Keep track of the number of redirects.
Integer count =
(Integer)context.getAttribute(REDIRECT_COUNT_CONTEXT_KEY);
if (count == null) {
count = new Integer(0);
}
count += 1;
context.setAttribute(REDIRECT_COUNT_CONTEXT_KEY, count);
return result;
}
}
and then
_httpClient.setRedirectHandler(new MyRedirectHandler());
and finally (with some code deleted)
HttpContext localContext = new BasicHttpContext();
response = _httpClient.execute(request, localContext);
URI permRedirectUri =
(URI)localContext.getAttribute(PERM_REDIRECT_CONTEXT_KEY);
if (permRedirectUri != null) {
newBaseUrl = permRedirectUri.toURL().toExternalForm();
}
-- Ken
On Apr 28, 2010, at 8:45am, swatkatz wrote:
Hello,
Using HttpClient 4.0. How do I differentiate between a temporary
redirect
and a permanent redirect ? I am getting the client to follow the
redirects
automatically and I get the new URL once I read the final response
but how
do I know if the client was temporarily redirected to this URL or
whether
the redirection was permanent ? The status code outside seems to be
200, so
I can't tell what the intermediate status codes were.
Thanks in advance.
--
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