Basic file uploading via website form using POST Requests in Python -

i try upload file on random website using python , http requests. this, use handy library named requests.

according the documentation, , answers on stackoverflow here , there, have add files parameter in application, after studying dom of web page.

the method simple:

1. look in source code url of form ("action" attribute);
2. look in source code "name" attribute of uploading button ;
3. look in source code "name" , "value" attributes of submit form button ;
4. complete python code required parameters.

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sometimes works fine. indeed, managed upload file on site : http://pastebin.ca/upload.php

after looking in source code, url of form upload.php, buttons names file , s, value upload, following code:

url = "http://pastebin.ca/upload.php" myfile = open("text.txt","rb") r = requests.get(url,data={'s':'upload'},files={'file':myfile}) print r.text.find("the uploaded file has been accepted.")  # ≠ -1 

but now, let's @ site: http://www.pictureshack.us/

the corresponding code follows:

url = "http://www.pictureshack.us/index2.php" myfile = open("text.txt","rb") r = requests.get(url,data={'upload':'upload picture'},files={'userfile':myfile}) print r.text.find("unsupported file type!")  # = -1 

in fact, difference see between these 2 sites first, url work done when submitting form same page form , files uploaded.

but not solve problem, because still not know how submit file in second case.

i tried make request on main page instead of .php, of course not work.

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in addition, have question.

suppose form elements not have "name" attribute. how supposed designate @ request python?

for example, site: http://imagesup.org/

the submitting form button looks this: <input type="submit" value="héberger !">

how can use in data parameters?

the forms have component must honour: method attribute. using get requests, forms referring use method="post". use requests.post send post request.