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https://issues.apache.org/jira/browse/KNOX-80?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13690386#comment-13690386
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Kevin Minder commented on KNOX-80:
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The Servlet API docs for ServletRequest.getContentLength clearly state that a
return value of -1 indicates that the length is unknown. When Knox might
rewrite the body entity this is exactly the case. After thinking about this
more I'm not sure that we can do better than the way it currently works. We
might need to do some work with the HTTP client inside Knox to make sure that
HTTP chunking can be used.
> Knox should not set HTTP request content length as -1
> -----------------------------------------------------
>
> Key: KNOX-80
> URL: https://issues.apache.org/jira/browse/KNOX-80
> Project: Apache Knox
> Issue Type: Bug
> Components: Server
> Affects Versions: 0.3.0
> Reporter: Dilli Arumugam
> Fix For: 0.3.0
>
>
> I see gateway-provider-identity-assertion-
> pseudo/src/main/java/org/apache/hadoop/gateway/filter/IdentityAssertionHttpServletRequestWrapper.java
> is returning -1 as Content-Length if contentType.startsWith(
> "application/x-www-form-urlencoded" ).
> This not standard compatible and I believe is error prone.
> Please see http 1.1 specs at
> http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.13
> Quoting from the specs:
> Any Content-Length greater than or equal to zero is a valid value. Section
> 4.4 describes how to determine the length of a message-body if a
> Content-Length is not given.
> So, we should not return content-length value as -1.
> If we rewrite the content and change the entity length in the process, we
> have to compute and set the correct content-length or try to leverage chunked
> encoding where you do not specify the content-length header.
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