[Twisted-Python] Reverse HTTP proxy code review
kevin.horn at gmail.com
Tue Mar 2 16:17:41 EST 2010
On Tue, Mar 2, 2010 at 3:00 PM, Fred C <fred at bsdhost.net> wrote:
> On Mar 2, 2010, at 12:45 PM, Kevin Horn wrote:
> On Tue, Mar 2, 2010 at 1:19 PM, Fred C <fred at bsdhost.net> wrote:
>> I am totally new with Twisted and this the first code I have ever written
>> using that package. One of my main problem was to figure out how to fit
>> things together and I am not even sure I understand everything I am doing
>> Anyway, for a project I have to write a proxy that figure out where is
>> located a resource by requesting a database. then figure out if the resource
>> is accessible and them open a proxy connection to download that resource.
>> I was wandering if there is someone in that mailing list who can review
>> that code and tell me how I can improve things. I know I am not accessing
>> the database the right way but I can't figure out how to work with the
>> Any help or advice will be very much appreciated. The code is available
>> here: http://pastebin.com/BGcqzh4Y
> I don't really use Twisted for web work, so I don't have much of a comment
> on that, but for database access you probably want to use
> That was of the thing I know it's wrong with my code. I have to use adbapi
> and have a call back to get the result from the database. My main problem in
> that case is I don't know how to have the caller wait for the response from
> the database.
> Thanks for taking time to look at that code and for your reply.
Have a look at:
Basically, when you call runQuery, you get back a deferred object. You'll
want to add a callback to that using something like:
d = dbpool.runQuery('Your SQL Here')
# do some stuff with your results
so when the DB query completes, your_callback_function will get called
automatically by the deferred object.
Obviously this is very rough, probably incorrect code, but hopefully it's
enough to get you started.
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