[Twisted-Python] Reverse HTTP proxy code review
Hello, 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 here. 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 Callbacks. Any help or advice will be very much appreciated. The code is available here: http://pastebin.com/BGcqzh4Y -fred- -- http://kiq.me/oi
On Mar 2, 2010, at 12:45 PM, Kevin Horn wrote:
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. -fred- http://kiq.me/oi
On Tue, Mar 2, 2010 at 3:00 PM, Fred C <fred@bsdhost.net> wrote:
Have a look at: http://twistedsphinx.funsize.net/projects/core/howto/rdbms.html#how-do-i-use... Basically, when you call runQuery, you get back a deferred object. You'll want to add a callback to that using something like: def get_stuff_from_db(): d = dbpool.runQuery('Your SQL Here') d.addCallback(your_callback_function) def your_callback_function(results): # 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. Kevin Horn
On Mar 2, 2010, at 12:45 PM, Kevin Horn wrote:
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. -fred- http://kiq.me/oi
On Tue, Mar 2, 2010 at 3:00 PM, Fred C <fred@bsdhost.net> wrote:
Have a look at: http://twistedsphinx.funsize.net/projects/core/howto/rdbms.html#how-do-i-use... Basically, when you call runQuery, you get back a deferred object. You'll want to add a callback to that using something like: def get_stuff_from_db(): d = dbpool.runQuery('Your SQL Here') d.addCallback(your_callback_function) def your_callback_function(results): # 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. Kevin Horn
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Fred C -
Kevin Horn