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https://issues.apache.org/jira/browse/COUCHDB-433?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12742592#action_12742592
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Robert Newson commented on COUCHDB-433:
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logged upstream as http://code.google.com/p/mochiweb/issues/detail?id=42
> CouchDB doesn't handle Expect header.
> -------------------------------------
>
> Key: COUCHDB-433
> URL: https://issues.apache.org/jira/browse/COUCHDB-433
> Project: CouchDB
> Issue Type: Bug
> Affects Versions: 0.10
> Reporter: Robert Newson
> Attachments: 0001-fix-e-c-handling.patch
>
>
> An HTTP client may elect to send an "Expect: 100-Continue" header. All
> compliant HTTP servers are required to;
> "A server that does not understand or is unable to comply with any of the
> expectation values in the Expect field of a request MUST respond with
> appropriate error status. The server MUST respond with a 417 (Expectation
> Failed) status if any of the expectations cannot be met or, if there are
> other problems with the request, some other 4xx status."
> from http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
> CouchDB sends neither the Continue response (if it supports expect-continue)
> or 417 (if it doesn't).
> This leads clients that include the header to hang while they timeout
> expecting either response.
> Suggest returning a 417 response so that compliant clients will retry
> immediately without the Expect header.
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