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https://issues.apache.org/jira/browse/HTTPCORE-643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17170226#comment-17170226
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ASF subversion and git services commented on HTTPCORE-643:
----------------------------------------------------------

Commit abf437e145f62b178c95de2abab3ecae6e7a9cc2 in httpcomponents-core's branch 
refs/heads/5.1.x from Carter Kozak
[ https://gitbox.apache.org/repos/asf?p=httpcomponents-core.git;h=abf437e ]

HTTPCORE-643: Implement NullEntity for convenience (#209)



> Add zero content-length to PUT and POST requests with no entity
> ---------------------------------------------------------------
>
>                 Key: HTTPCORE-643
>                 URL: https://issues.apache.org/jira/browse/HTTPCORE-643
>             Project: HttpComponents HttpCore
>          Issue Type: Improvement
>    Affects Versions: 5.0.1
>            Reporter: Carter Kozak
>            Priority: Major
>          Time Spent: 1h 20m
>  Remaining Estimate: 0h
>
> [https://tools.ietf.org/html/rfc7230#section-3.3.2] states "A user agent 
> SHOULD send a Content-Length in a request message when
>  no Transfer-Encoding is sent and the request method defines a meaning
>  for an enclosed payload body."
>  
> I encountered a proxy that rejected both PUT and POST requests with no 
> content-length and no body by returning a 411 "Length Required" status. I 
> believe this is rare, and servers are expected to support requests with and 
> without a defined content length and no body, but it would be helpful to add 
> the content-length by default to avoid incompatibility.



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