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https://issues.apache.org/jira/browse/HTTPCLIENT-1452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13881001#comment-13881001
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Lars Bachmann commented on HTTPCLIENT-1452:
-------------------------------------------
To fix it update class org.apache.http.impl.client.DefaultRequestDirector.java
with the following patch:
1107,1109d1106
< // set host of redirect request
< this.log.debug("Setting host param: " + uri.getHost());
< redirect.setHeader("Host", uri.getHost());
> in case of a redirect a wrong host param is set to http header
> --------------------------------------------------------------
>
> Key: HTTPCLIENT-1452
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1452
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: HttpClient
> Reporter: Lars Bachmann
>
> The following url will lead to a circular redirect and a
> CircularRedirectException in the end:
> http://it.bing.com/
> The reason is that http://it.bing.com will redirect to http://www.bing.com
> but the header param "host" is not set to the new host (bing.com), instead
> the host param of the original request (it.bing.com) is used. In the end the
> redirect request will not call http://www.bing.com but http://it.bing.com
> instead, which is the same location like the original url and will end up in
> a circular deadlock.
> The fix would be to override the host param with the value of the redirect
> request after copying all header params from the original request to the
> redirect request.
> The class to adjust is:
> org.apache.http.impl.client.DefaultRequestDirector.java
> The problem is also addressed here:
> http://stackoverflow.com/questions/6698214/avoid-circular-redirect-using-httpclient-4-1-1
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