unable to send data using urllib and urllib2 (python)

Question

Hello everybody (first post here).

I am trying to send data to a webpage. This webpage request two fields (a file and an e-mail address) if everything is ok the webpage returns a page saying "everything is ok" and sends a file to the provided e-mail address. I execute the code below and I get nothing in my e-mail account.

import urllib, urllib2
params = urllib.urlencode({'uploaded': open('file'),'email': '[email protected]'})
req = urllib2.urlopen('http://webpage.com', params)
print req.read()

the print command gives me the code of the home page (I assume instead it should give the code of the "everything is ok" page).

I think (based o google search) the poster module should do the trick but I need to keep dependencies to a minimum, hence I would like a solution using standard libraries (if that is possible).

Thanks in advance.

• Corey Goldberg: are you missing any headers? 'Content-type: application/x-www-form-urlencoded'
• Mike Pennington: Please don't post your solution in the question. You can and should answer your own question, if none of the answers below helped.
• aloctavodia: Sorry about that. I have just fixed.

Answer 1

Thanks everybody for your answers. I solve my problem using the mechanize library.

import mechanize 
br = mechanize.Browser()
br.open('webpage.com') 
email='[email protected]'
br.select_form(nr=0) 
br['email'] = email 
br.form.add_file(open('filename'), 'mime-type', 'filename') 
br.form.set_all_readonly(False) 
br.submit() 

Answer 2

This site could checks Referer, User-Agent and Cookies.

Way to handle all of this is using urllib2.OpenerDirector which you can get by urllib2.build_opener.

# Cookies handle
cj = cookielib.CookieJar()
CookieProcessor = urllib2.HTTPCookieProcessor(cj)
# Build OpenerDirector
opener = urllib2.build_opener(CookieProcessor)
# Valid User-Agent from Firefox 3.6.8 on Ubuntu 10.04
user_agent = 'Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.8) Gecko/20100723 Ubuntu/10.04 (lucid) Firefox/3.6.8'
# Referer says that you send request from web-site title page
referer = 'http://webpage.com'
opener.addheaders = [
 ('User-Agent', user_agent),
 ('Referer', referer),
 ('Accept-Charset', 'utf-8')
]

Then prepare parameters with urlencode and send request by opener.open(params)

Documentation for Python 2.7: cookielib, OpenerDirector

• aloctavodia: thanks for your answer, but your solution does not solve my problem. I think (i have just realized) that my problem have something to do with the fact that the page needs the data to be encoded as "multipart/form-data"
• Kirill: OK. Then you can use what was advised: MultiPartPostHandler. It is few lines of code so it isn't really dependency. Consider it just your own class which you wrote yesterday for convenient file uploading :)
• aloctavodia: I am trying to use this solution (with some minor changes, but still not working properly) [link]stackoverflow.com/questions/680305/…