On Monday, December 1, 2014 12:29:04 PM UTC-8, Israel Brewster wrote: > I don't know if this is a cherrypy specific question (although it will be > implemented in cherrypy for sure), or more of a general http protocol > question, but when using cherrypy to serve a web app, is there anyway to > prevent browser prefetch? I'm running to a problem, specifically from Safari > on the Mac, where I start to type a URL, and Safari auto-fills the rest of a > random URL matching what I started to type, and simultaneously sends a > request for that URL to my server, occasionally causing unwanted effects. > > > For example, I have a URL on my Cherrypy app that updates some local caches. > It is accessed at http://<server>/admin/updatecaches So if I start typing > http://<server>/a, for example, safari may auto-fill the "dmin/updatecaches", > and trigger a cache refresh on the server - even though I was just trying to > get to the main admin page at /admin. Or, it might auto-fill "uth/logout" > instead (http://<server>/auth/logout), and log me out of my session. While > the former may be acceptable (after all, a cache update, even if not strictly > needed, is at least non-harmfull), the latter could cause serious issues with > usability. So how can cherrypy tell the difference between the "prefetch" and > an actual request, and not respond to the prefetch? > > > > > > ----------------------------------------------- > > Israel Brewster > > Systems Analyst II > > Ravn Alaska > > 5245 Airport Industrial Rd > > Fairbanks, AK 99709 > > (907) 450-7293 > > -----------------------------------------------
That sounds like a seriously misbehaving client to me. Your browser should not be sending requests until the user actually chooses a URL to open. The only thing I would suggest is to check the HTTP request headers (cherrypy.request.headers) of a genuine request versus one made by the automatic URL completion. If there are different headers, such as maybe an "X-Prefetch: True" or something, you could check for that. -- https://mail.python.org/mailman/listinfo/python-list
