HTTP 0.9 and peeking at URLs

Tim Berners-Lee (
Mon, 6 Sep 93 11:15:47 +0200

Jo was saying that libwww HTTP.c should be changed to look at the
URL for HTTP0.9 replies and I objected as it was a violation
of the spec which

>Theoretically, it shouldn't break anything that uses proper
>The use of the suffix to determine file type occurs only if it
>get a proper HTTP/1.0 response. If it gets a HTTP/1.0 response then
>the code should ignore the suffix.

But it will break HTTP/0.9 which files at always HTML or plain text preceded by <PLAINTEXT>.
And specifies taht the url is opaque.

Consider the entry in a gatewayed database


where the end gif in fact stands for "Group d'Interfaces
Foncionelles" and is a database partition. The text comming back

GIF8756 is the interface module responable for the interface
monitoring of the valve closure pressure release mechanisms.
It is currently

Sounds contrived but there is a valid server converting valid
url into valid documet, which looked at the .gif or one which

So what do we do? especially gateways which this, as the gateways are allowed to generate the URL
any way they please. We can't say "but not use dots"
at this stage. And we can't enforce that gateways use HTTP1.0
because the ability to make a script gateway trivially is
really neat.

The only client I think which which have to use HTTP 1.0. Noddy gateways to databases will still
be able to use HTTP 0.9.