WSGI question: reading headers before message body has been read

[Ron Garret]

On Jan 18, 12:40 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Ron Garret schrieb:
>
>
>
> > On Jan 18, 11:29 am, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> >> Ron Garret schrieb:
>
> >>> I'm writing a WSGI application and I would like to check the content-
> >>> length header before reading the content to make sure that the content
> >>> is not too big in order to prevent denial-of-service attacks.  So I do
> >>> something like this:
> >>> def application(environ, start_response):
> >>>     status = "200 OK"
> >>>     headers = [('Content-Type', 'text/html'), ]
> >>>     start_response(status, headers)
> >>>     if int(environ['CONTENT_LENGTH'])>1000: return 'File too big'
> >>> But this doesn't seem to work.  If I upload a huge file it still waits
> >>> until the entire file has been uploaded before complaining that it's
> >>> too big.
> >>> Is it possible to read the HTTP headers in WSGI before the request
> >>> body has been read?
> >> AFAIK that is nothing that WSGI defines - it's an implementation-detail
> >> of your server. Which one do you use?
>
> > Apache at the moment, with lighttpd as a contender to replace it.
>
> Together with mod_wsgi?
>
> Diez

Yes.  (Is there any other way to run WSGI apps under Apache?)

rg