CouchDB doesn't handle Expect header.
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Key: COUCHDB-433
URL: https://issues.apache.org/jira/browse/COUCHDB-433
Project: CouchDB
Issue Type: Bug
Affects Versions: 0.10
Reporter: Robert Newson
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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