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Posted to dev@hc.apache.org by "Oleg Kalnichevski (JIRA)" <ji...@apache.org> on 2016/10/06 14:57:20 UTC
[jira] [Updated] (HTTPCLIENT-1776) Handling of HEAD responses
without payload headers
[ https://issues.apache.org/jira/browse/HTTPCLIENT-1776?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Oleg Kalnichevski updated HTTPCLIENT-1776:
------------------------------------------
Summary: Handling of HEAD responses without payload headers (was: Handling of HEAD without payload headers)
> Handling of HEAD responses without payload headers
> --------------------------------------------------
>
> Key: HTTPCLIENT-1776
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1776
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: HttpClient (classic)
> Affects Versions: 4.5.2
> Reporter: Reinhold Früsmer
> Fix For: 5.0 Alpha2
>
> Attachments: tomcat-squid-ntlm-not-stateful.pcapng, tomcat-squid-ntlm-stateful.pcapng, wire-context-log.txt, wirelog-4.5.3.txt
>
>
> Hi,
> I'm not sure if this is a problem with HttpClient itself or with Squid (3.3.8) proxy server, but maybe you could please advise.
> Our client application first sends a HEAD request for NTLM authentication with the proxy and then re-uses the execution context as described in https://hc.apache.org/httpcomponents-client-ga/tutorial/html/authentication.html for the following POST requests.
> Using more recent versions of Tomcat on the server-side, re-using the execution context does not work anymore, the NTLM authentication negotiate-challenge is repeated forever and following POST requests with chunked transfer-encoding don't work since they are interrupted by the authentication challenge.
> I figured out the difference betweeen newer and older Tomcat versions and found the reason: previously, Tomcat automatically added a "Content-Length: 0" header to the reponse of HEAD requests. With "Bug 59310 - Content-Length of HEAD requests incorrectly computed as 0" (https://bz.apache.org/bugzilla/show_bug.cgi?id=59310), this behavior was changed and without this header, NTLM connections to the proxy don't persist anymore.
> As the content-length header is optional in a response to a HEAD request (RFC 7230), the problem must be either in HttpClient or Squid proxy.
> Thanks in advance!
> Best regards
> Reinhold
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