Hello Oleg,
First, thanks a lot for you answer.
Is it written in the rfc 2626 spec because I have not seen it :-(
I have only seen at 10.3.2:
If the 301 status code is received in response to a request other
than GET or HEAD, the user agent MUST NOT automatically redirect the
request unless it can be confirmed by the user, since this might
change the conditions under which the request was issued.
Note: When automatically redirecting a POST request after
receiving a 301 status code, some existing HTTP/1.0 user agents
will erroneously change it into a GET request.
So my understanding is that the default behavior for HTTP/1.1 user agent is to
not change the HTTP request (eg keep the POST request).
Am I wrong ?
But maybe the first paragraph prevails meaning that for 301 user agent
automatic redirection is not allowed: right ?
Best Regards.
-----Original Message-----
From: Oleg Kalnichevski [mailto:[email protected]]
Sent: mardi 5 février 2013 23:31
To: HttpClient User Discussion
Subject: Re: POST redirection question
On Tue, 2013-02-05 at 18:53 +0100, COURTAULT Francois wrote:
> Hello everyone,
>
> At the beginning, I had something like that :
> HttpClient httpClient = new DefaultHttpClient(); HttpPost httpPost =
> new HttpPost(SOME_URL); HttpResponse postResponse =
> httpClient.execute(httpPost);
>
> It turns out that I got a 301 Moved permanently.
>
> So I made the following modifications, either:
> - httpClient.setRedirectStrategy(new LaxRedirectStrategy());
> - or httpClient.setRedirectStrategy(new DefaultRedirectStrategy());
> - or httpClient.setRedirectStrategy(new
> DefaultRedirectStrategy() {
> @Override
> public boolean isRedirected(HttpRequest request,
> HttpResponse response, HttpContext context) {
> boolean isRedirected = false;
> try {
> isRedirected = super.isRedirected(request,
> response, context);
> } catch (ProtocolException e) {
> fail("Unable to set a redirect strategy,
> reason: " + e.getMessage());
> }
>
> if (!isRedirected) {
> int responseCode =
> response.getStatusLine().getStatusCode();
> if (responseCode == 301 || responseCode == 302)
> {
> return true;
> }
> }
> return false;
> }
> });
> - or the same than above with new LaxRedirectStrategy
>
> Each time, after receiving a 301, the client sent a GET request instead of my
> initial HTTP request, which is a POST one as you can see, to the new location.
> Any advice ? sample ?
> Or is it an issue ?
>
> Best Regards.
Only in case of a TEMPORARY_REDIRECT it is valid to redirect the request
without changing its method. In all other cases methods other than HEAD and GET
get converted to GET. To change this behavior you need to override #getRedirect
method
http://hc.apache.org/httpcomponents-client-ga/httpclient/xref/org/apache/http/impl/client/DefaultRedirectStrategy.html#213
Oleg
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