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From "Dariusz Kordonski (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HTTPCLIENT-1716) DefaultRedirectStrategy seems to disregard HTTP spec for PUT/POST/DELETE request redirects
Date Thu, 28 Jan 2016 11:49:39 GMT

    [ https://issues.apache.org/jira/browse/HTTPCLIENT-1716?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15121266#comment-15121266
] 

Dariusz Kordonski commented on HTTPCLIENT-1716:
-----------------------------------------------

Hi Oleg,

thanks for pointing that out, I wasn't aware of the new revision of HTTP 1.1, I was basing
my comments on the outdated docs and what I read on the web. I guess in such case it's definitely
not a bug, although my reading of 

{quote}
Automatic redirection needs to done with care for methods not known to be safe, as defined
in Section 4.2.1, since the user might not wish to redirect an unsafe request.
{quote}

is that idempotent methods are not necessarily always OK to automatically redirect (as opposed
to safe methods, to which PUT does not belong as per 4.2.1). 

However I don't have much expertise in interpreting specifications and I raised this issue
with the "traditional" interpretation of 3xx restrictions in mind, so feel free to close it
(with the hope that the docs of {{DefaultRedirectStrategy}} will be updated at some point).

Best regards,
Dariusz Kordonski

> DefaultRedirectStrategy seems to disregard HTTP spec for PUT/POST/DELETE request redirects
> ------------------------------------------------------------------------------------------
>
>                 Key: HTTPCLIENT-1716
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1716
>             Project: HttpComponents HttpClient
>          Issue Type: Bug
>          Components: HttpClient
>    Affects Versions: 5.0 Alpha1
>            Reporter: Dariusz Kordonski
>
> Observed on {{trunk}} branch that has 5.0-alpha2-SNAPSHOT mvn version.
> The docs for {{DefaultRedirectStrategy}} correctly state:
> {quote}
> This strategy honors the restrictions on automatic redirection of entity enclosing methods
such as POST and PUT imposed by the HTTP specification. \{@code 302 Moved Temporarily\}, \{@code
301 Moved Permanently\} and \{@code 307 Temporary Redirect\} status codes will result in an
automatic redirect of HEAD and GET methods only. POST and PUT methods will not be automatically
redirected as requiring user confirmation.
> {quote}
> (NB: in fact to be more precise I think DELETE requests should also be *not* automatically
redirected)
> However the actual implementation does not seem to follow this, whereby {{isRedirected}}
pretty much lets all requests through:
> {code}
> switch (statusCode) {
>             case HttpStatus.SC_MOVED_PERMANENTLY:
>             case HttpStatus.SC_MOVED_TEMPORARILY:
>             case HttpStatus.SC_SEE_OTHER:
>             case HttpStatus.SC_TEMPORARY_REDIRECT:
>                 return true;
>             default:
>                 return false;
>         }
> {code}
> A simple failing test case that confirms the problem for a PUT request resulting with
302 (PUT should only be redirected automatically for 303):
> {code}
>     @Test
>     public void testIsRedirectedForTemporaryRedirectPut() throws Exception {
>         final DefaultRedirectStrategy redirectStrategy = new DefaultRedirectStrategy();
>         final HttpResponse response = new BasicHttpResponse(HttpVersion.HTTP_1_1,
>                 HttpStatus.SC_TEMPORARY_REDIRECT, "Temporary Redirect");
>         response.addHeader("Location", "http://localhost/stuff");
>         final HttpContext context = new BasicHttpContext();
>         assertFalse(redirectStrategy.isRedirected(new HttpPut("http://localhost/"), response,
context));
>     }
> {code}



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