Problem with httplib and POST

Ray Van Dolson leovd at pacbell.net
Wed Nov 7 19:54:10 CET 2001


I'm writing a kind of interface to the Dotster.com website that will allow 
me to automatically update my DNS entries (controlled via a web interface 
on their server) when my IP changes by calling a Python script.  So far 
I've made pretty good progress.  In case you're interested, the location 
of my source is currently at:

http://www.bludgeon.org/cvs/index.cgi/pydotster/

On to my problem.  Once I do all the authentication and stuff, I receive 
two cookies from the server--a session ID and a cookie setting the domain 
I am currently working with.  Then I can call the editdns form and POST a 
new IP to it.  This is where I am running into problems.  Here is an 
excerpt of the HTML of the form I'm trying to complete:

<form METHOD=POST Action=editdns.asp?Update=1&sld_nsrec_id=4444 id=form1     
	name=form1>
<table border="0" width="70%">
<tr> <CENTER><STRONG><STRONG> EDIT RECORD FOR BLUDGEON.ORG</CENTER>
</STRONG></STRONG><td width='32%'><b>Host Name</b></td><td width='14%' 
align=center><b>Record</b></td><td width='24%'><b>Host IP 

Address</b></td></tr><tr><td width='32%' >
<input type=text size=30 name=hostname value=TRISTRAM.BLUDGEON.ORG><td     
	width='14%' align= center>ALIAS</td><td width='24%'>
<input type=text name=hostip value=127.0.0.1 size=20></td>
</tr>
</table>
<p>
<input type="submit" value="Update DNS Record" name="B1"></p>
</form>

Basically I am doing something like this to process this form:

h = httplib.HTTPS('www.dotster.com')
h.putrequest("POST", "/management/editdns.asp?Update=1&sld_nsrec_id=4444")
h.putheader('Accept', 'text/html')
h.putheader('Content-type', 'application/x-www-form-urlencoded')
h.putheader('Host', 'www.dotster.com')
h.putheader('Cookie', 'Domain=Name=BLUDGEON%2EORG;     
	path=/ASPSESSIONIDQQQQQWUG=JCNNMKIAEEJABDOPNCCEGFFA; path=/')

params = urllib.urlencode({'hostname': HOST_HERE, 'hostip': NEW_IP, 'B1':     
	'Update DNS Record'})
h.putheader('Content-Length', "%d" % len(params))
h.endheaders()
h.send(params)
reply, msg, headers = h.getreply()

Is there anything glaringly wrong with this that doesn't match up with the 
FORM above?  This executes just fine and I get a redirect from the server 
(302) however, the new IP is NOT accepted.  The old one is still there.  
I'm scratching my head trying to figure out what I am not sending to the 
server.  Does order of Cookies matter?  The whole POST line that I am 
sending seems a little strange to me since it actually has parameters on 
it... Could it be perhaps that I am using HTTP/1.0 instead of HTTP/1.1?  
If so, how can I make httplib use HTTP/1.1?  I edited the httplib.py and 
changed the string from 1.0 to 1.1, but that caused my script to hang.

I normally run a sniffer to try and figure out exactly what headers my web 
browser sends when it does this exacct same thing (successfully), however 
since this is an SSL-only site, this doesn't exactly work. :)  I saved the 
form do my own server and processed it locally and watched the headers.  
Of course, the cookies weren't set for my local site (I can't recreate 
their authentication scheme) but I was able to duplicate the headers 
exactly in my script.  Still no go.

Any advice?
Ray Van Dolson



More information about the Python-list mailing list