IPP Mail Archive: RE: IPP> Chunking Explanation

IPP Mail Archive: RE: IPP> Chunking Explanation

RE: IPP> Chunking Explanation

Stefan Andersson (stefan.andersson@axis.com)
Thu, 21 Jan 1999 13:34:01 +0100 (MET)

On Wed, 20 Jan 1999, Wagner,William wrote:
>=20
> RFC2068 requires HTTP1.1 Servers to support both Content Length and
> Chunking for all requests. However, some IPP servers may exist that
> do not support Chunking. In this case, the IPP server may return error
> 411(Length Required) in response to the HTTP POST.
>=20
> Further, some IPP servers may implement a filter-and-buffer approach t=
o
> determine CONTENT_LENGTH from a chunked encoding before passing the dec=
oded
> request body to a CGI application. If the buffered request grows too l=
arge,
> the server may reject the request with status code 413 (Request Entity =
Too
> Large). If this occurs, the IPP server may also close the connection to
> prevent the client from continuing the request.=20
>=20
If the server can't ensure that the client has acknowledged the response
it's better to consume the rest of the data, this is to make sure that th=
e
client reads the response.

draft-ietf-http-v11-spec-rev-06: 10.4 Client Error 4xx
If the client is sending data, a server implementation using TCP
SHOULD be careful to ensure that the client acknowledges receipt of
the packet(s) containing the response, before the server closes the
input connection. If the client continues sending data to the server
after the close, the server's TCP stack will send a reset packet to
the client, which may erase the client's unacknowledged input buffers
before they can be read and interpreted by the HTTP application.

/Stefan

--
Stefan Andersson                         Software Engineer
Print Server Business Unit               Stefan.Andersson@axis.com
AXIS Communications AB                   Phone: +46 46 270 19 85
Scheelev=E4gen 16                          Fax: +46 46 13 61 30
S-223 70  LUND, SWEDEN                   http://www.axis.com =20