Thanks! Re: [Twisted-Python] Question about RequestHandlers
Andrew Francis
andrewfr_ice at yahoo.com
Fri Jan 25 14:05:59 EST 2008
Hello Jean-Paul:
AF>What I am unclear about is how to properly
structure
AF>the programme to get the appropriate behaviour. I
am
AF>assuming this is possible. If so, what am I
missing?
>The part where you got confused is the part that
>inlineCallbacks, I think.
Yes.
>You defined a gotPage callback which uses
>defer.returnValue. This is totally bogus. If you
>want a callback to return a value, then you just
>return it. defer.returnValue lets you specify the
>result of a Deferred returned by a call to a function
>decorated with inlineCallbacks.
>Your gotPage function has not been so decorated, so
>there's your bug I suspect.
No, I found the example for inlinecallback a wee
confusing. When I see the line
"makeSomeRequestResultingInDeferred()", I
automatically thought I needed to create a deferred
and in the process, add a callback function. I also
misinterpreted the proviso about returnValue.
Perhaps it is just me, but maybe it would be better to
use a more concrete example using a twisted call.
That said, I have done what you suggested:
class MyRequestHandler(http.Request):
@defer.inlineCallbacks
def process(self):
try:
result = yield
client.getPage("http://www.google.com")
except Exception, err:
log.err(err, "process getPage call
failed")
else:
self.setHeader('Content-Type',
'text/html')
self.write(result)
self.finish()
and this works beautifully. Thanks! inlinecallbacks
look really cool.....
Cheers,
Andrew
____________________________________________________________________________________
Looking for last minute shopping deals?
Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: inlineExample.py
Url: http://twistedmatrix.com/pipermail/twisted-python/attachments/20080125/11e2895a/attachment.txt
More information about the Twisted-Python
mailing list