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https://issues.apache.org/jira/browse/HTTPCORE-516?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16381741#comment-16381741
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Michael Osipov commented on HTTPCORE-516:
-----------------------------------------

There are no predefined string constants in {{org.apache.http.HttpStatus}}, 
those are integers. Please do not confuse the status code with portions of the 
status line. Again, it is not "200", but "200 ". Note the trailing space.

> Reason phrase in HttpStatus constants are not needed due to changes in RFC 
> 7230
> -------------------------------------------------------------------------------
>
>                 Key: HTTPCORE-516
>                 URL: https://issues.apache.org/jira/browse/HTTPCORE-516
>             Project: HttpComponents HttpCore
>          Issue Type: Task
>          Components: HttpCore
>            Reporter: Viktor Chmel
>            Priority: Major
>
> *Introduction*
> After updating one (Serivce-A) of our Web services to Tomcat 8.5 we realised 
> that HTTP Status header changed according to RFC 7230 
> _RFC 7230 states that clients should ignore reason phrases in HTTP/1.1 
> response messages. Since the reason phrase is optional, Tomcat no longer 
> sends it. As a result the system property 
> org.apache.coyote.USE_CUSTOM_STATUS_MSG_IN_HEADER is no longer used and has 
> been removed._ "
> Some temporary workaround exists (set [deprecated option sendReasonPhrase to 
> true|https://tomcat.apache.org/migration-85.html#HTTP_connector_changes]), 
> but it will be impossible in tomcat 9.
> *Problem*
> Ok, what about HttpCore?
> Another our service (Service-B) use [HttpStatus 
> |https://hc.apache.org/httpcomponents-core-ga/httpcore/apidocs/org/apache/http/HttpStatus.html]lib
>  and its constants like SC_OK to assert response from Service-A. And after 
> updating to tomcat 8.5 it became to fail assertion every time. Why? Now SC_OK 
> = "200 OK", but according to RFC 7230 must be just "200". The same issue with 
> another status constans.
> I`m not expert in you library, but smth must be done to support new standard 
> from one hand and to support legacy http servers from another.
>  



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