[jira] [Commented] (MJAVADOC-533) entries that point to a resource that requires an Accept header may be ignored

["Andy Wilkinson (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MJAVADOC-533?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16575252#comment-16575252 ] 

Andy Wilkinson commented on MJAVADOC-533:
-----------------------------------------

The Cloudflare rule that's triggered and results in a Captcha challenge is named {{IE6 detection [Type B]}}. It seems to require both a missing {{Accept}} header and the {{User-Agent: "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)"}} header.

> <link> entries that point to a resource that requires an Accept header may be ignored
> -------------------------------------------------------------------------------------
>
>                 Key: MJAVADOC-533
>                 URL: https://issues.apache.org/jira/browse/MJAVADOC-533
>             Project: Maven Javadoc Plugin
>          Issue Type: Bug
>    Affects Versions: 3.0.1
>            Reporter: Andy Wilkinson
>            Priority: Minor
>
> This is a regression caused by the changes made to fix MJAVADOC-427.
> The HTTP client configuration that's used to get the redirect URLs does not include an {{Accept}} header in the requests that it makes. This can result in a 403 response for some javadoc, such as Spring Framework's which is fronted by Cloudflare. The lack of {{Accept}} header will sometimes cause Cloudflare to respond with a 403 containing a Captcha.
> I'm a member of the Spring Framework team and have asked our sysadmin to look at tweaking Cloudflare's rules, but I thought it worth reporting the problem here as others may be affected and may not be in a position to change the server's configuration.



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