On Jun 12, 2007, at 2:53 PM, Mike Orr wrote:
>
> I'm trying to cache a controller method in both the server and
> browser. One twist is it's a text document (a tab-delimited file).
> Beaker caching is working on the server end (with 1 hour expire time):
>
> from pylons.decorators.cache import beaker_cache
> @beaker_cache(key=None, expire=CONFIG["cache.data"], type="file",
> query_args=False)
> def map_markers(self):
> ...
>
> But ETAG caching is not working:
>
> encoding = "utf-8"
> resp = etag_cache("map_markers")
> resp.headers["content-type"] = "text/plain; charset=%s" % encoding
> for inc in model....:
> lin = "%s\t%s\n" % ...
> lin.encode(encoding, "replace")
> resp.write(lin)
> return resp
>
> HTTP/1.x 200 OK
>
> Server: PasteWSGIServer/0.5 Python/2.5.1
>
> Date: Tue, 12 Jun 2007 21:47:49 GMT
>
> Content-Type: text/plain; charset=utf-8
>
> Connection: close
>
The problem here is that no etag header is sent to the browser. I
don't understand why, from the code above there should definitely be
one there.
>
> I'd like the browser to cache this page and not bother the server
> again for an hour or a day. Is etag_cache supposed to do this or do I
> have to set the HTTP headers manually?
>
Browsers will always check back to make sure a etag/lastmodified
cache page hasn't expired. You want to also use the Expires header
which tells the browser when it actually needs to check back
--
Philip Jenvey
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