s s wrote:

Hi,

This is my first post to this list.

I've been using Twisted for a few (like three) days.  My wife had a 

baby two days ago, no, really. I just got the other two kids to bed and thought I'd ask...sorry if this has been answered eleven-thousand times before but I did search the archives first.

I'm writing a client app that needs to get the contents of a URL, 

usually just a web page.

I'm trying to use client.py's downloadPage(url, file, 

contextFactory=None, *args, **kwargs):

It claims to use a 'file' which, according to the docstring, can be 

a file or file-like object.

It uses the HTTPDownloader class to perform the actual download.

In the pageEnd(): method of HTTPDownloader, the 'file' is closed.

Unfortunately, for 'file-like' objects, like StringIOs, this trashes 

the 'file'; not so useful since I need to work with the result.

Huh, so it does. That's a pretty rubbish feature of StringIO

I realize I can subclass and override and such but it seems odd that 

a function that is documented to use a file-like object uses a class that will destroy something that's not a 'file.'

My guess is that calling "close" is to ensure that data is actually written to the file before returning, but I agree it's not helpful.

Since you obviously want the page as a string, I recommend you use t.w.client.getPage which returns the result as a deferred(string):

from twisted.internet import reactor from twisted.web import client

def got(text): print "page is", len(text), "bytes"

client.getPage('http://www.google.com%27).addCallback(got) reactor.run()

I'm sure I'm missing something...or maybe nobody uses this 'cause 

there's something way better that I haven't discovered yet.

Clues?

Thanks,

S, AKA: Steve Steiner

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