3.6.2 Warning About the Use and Support of Chunked Requests
This section describes some problems with the use of chunked requests and
Some HTTP/1.1 implementations support chunked responses in the GET method,
but do not support chunked POST method requests, in spite of the HTTP/1.1
Some HTTP/1.1 implementations that support CGI scripts and/or servlets do
not accept chunked POST method requests. These implementations MAY reject
the method and return a 411 status code (Length Required), MAY attempt to
buffer the request and run out of room returning a 413 status code (Request
Entity Too Large), or MAY successfully accept the chunked request.
The HTTP/1.1 standard does not guarantee that an origin server will accept
chunked requests, regardless of the resource identified in the request.