From: "Rasmus Lerdorf" <[EMAIL PROTECTED]>
Sent: Tuesday, September 04, 2001 11:05 AM
> Ok, so the Apache 1.3 walks/hooks flow looks like this:
I'll rework this for you just a bit...
> ----
> ::post read-request hook::
>
> location_walk
> - checks r->uri and sets server-wide config
>
> XXuri->filename translation hookXX -- let's refer to this as
::uri translate name hook::
Modules translate the URI to r->filename, and/or determine they
will interfere^H^H^H^H^H^H^H^H^Hserve this request without the
filesystem at all :)
::map_to_storage hook::
Modules merge whatever per_dir_configs apply to their request (mod_proxy
does a proxy_walk), or return OK if there are no applicable, resource
specific per_dir_configs (say, for server-status), or let the reqeust fall
through to the...
--core map_to_storage function (hooked last)--
> directory_walk
> - checks fullpath r->filename and sets per-dir config
> file_walk
> - checks file part of r->filename
>
> location_walk
> - second call (in case anyone changed r->uri or r->per_dir_config)
>
> ::header parser hook::
>
> ::check access hook::
> ::check user id hook::
> ::check auth hook::
>
> ::type check hook::
>
> ::fixup hook::
>
> ::content handler hook::
>
> ::logger hook::
> ----
>
> Could someone more intimate with the 2.0 code post a similar flow for 2.0?
> I am just trying to make sure that this code I am writing for 1.3 right
> now won't have to be completely redesigned for 2.0.
It shouldn't. You potentially need to protect yourself from NULL r->filename
(we haven't decided what to do yet with *this*is*not*a*file* requests.) Since
PHP generally serves -files-, this won't be a huge change for you. For serving
from an SQL database, or proxied requests, or internal handlers (even php-status)
you can speed things up/protect the right resources with the map_to_storage hook.
mod_proxy now keeps it's own <Proxy[Match] {uri}> sections instead of using the
<Directory proxy:{uri}> fooness. Apache 2.0 won't run bogus paths through the
<Directory > sections anymore, see the (rather straightforward) patch to mod_proxy
on how to implement containers against a different resource for non-filesystem
requests, using map to storage. Instead of the core map_to_storage function,
proxy hooks the map_to_storage phase and uses proxy_walk instead.
I'll try to document this complete on my way into the office tommorow ;)
Bill
