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- I once explained the current HTTP protocol to a local network guru and
- he expressed concern that basing a protocol like this on TCP/IP is a
- great waste of network resources, since you are using a
- session-oriented protocol for what is essentially one remote procedure
- call. My question "then what would you recommend instead" provoked no
- useful answer (what is needed is *reliable* datagrams, but these are
- not implemented as an IP protocol; UDP requires too much coding for
- time-out, retransmission and fragmentation). Yet, he convinced me
- that a light-weight protocol like this should minimize the number of
- round-trips.
-
- I have the feeling that the current trend of basing the new protocol
- on NNTP violates that requirement. I like the idea of borrowing
- response and data formats from the FTP/SMTP/NNTP family of protocols,
- with suitable extensions for 8-bit data paths. However I don't like
- it if compatibility with NNTP forces us to have an extra round trip
- just so that the server can give its welcome message.
-
- Also, I don't like the fact that you must parse the RFC822/MIME header
- to find out how many bytes are to be expected. This seems to be
- mixing two levels of protocols: MIME assumes that the end of the
- message is already known, and the MIME headers then tell you what to
- do with it.
-
- As I see it, there are two possible ways of using MIME in HTTP+. We
- can either support MIME as the *only* data format (implementing any
- extensions we need as new MIME content types or subtypes or additional
- headers), or we we support MIME as one of the possible data formats.
-
- In both cases we need a way to indicate how much data follows; if all
- we ever send is MIME, all that is needed is a header indicating the
- byte count, otherwise a type identifier is needed as well.
-
- --Guido van Rossum, CWI, Amsterdam <guido@cwi.nl>
- "The plumage don't enter into it. He's stone dead!"
-
-