$upload_form = cut_str($page, '
Analysing the upload headers

Before you do anything else, you should grab HTTP Debugger Pro (or whatever you prefer using), then try uploading a file to the site in question so we can see what headers were sent along. You'll be glad to know that in most cases, all you ever need is what's posted via the upload form when you look at it via http debugger, because most of the other 'stuff' you see in the upload forms of a site is not necessary to be sent along with the file data. only some very basic stuff is needed.

So here we go - load up HTTP Debugger or whatever http header catcher you like, and upload a file to the server in your browser. You'll see it send a POST request to the url http://ul016.filefactory.com/upload.php, plus it will send some cookies along too (take a look at the 'Request Content' tab in HTTP debugger).

A sample upload postdata stream would look like this:
POST /upload.php HTTP/1.1
Accept: text/*
Content-Type: multipart/form-data; boundary=----------ae0GI3cH2KM7gL6ae0cH2KM7KM7Ij5
User-Agent: Shockwave Flash
Host: ul020.filefactory.com
Content-Length: 285429
Connection: Keep-Alive
Cache-Control: no-cache

------------ae0GI3cH2KM7gL6ae0cH2KM7KM7Ij5
Content-Disposition: form-data; name="Filename"

36.zip
------------ae0GI3cH2KM7gL6ae0cH2KM7KM7Ij5
Content-Disposition: form-data; name="cookie"

zLjW0ueLtA4IdfYHy/7imBhxGl0eV/wUNE4bwnFPzoGYgPVEEneUMr6TSVSvMLWc/9ZVXQwBr+LL7ZIp1CiUSJB9VJSb3h/eE1gSvigoNfs4m92WxfhruNqoQuAKbpc5pb9AxYSRYRE=
------------ae0GI3cH2KM7gL6ae0cH2KM7KM7Ij5
Content-Disposition: form-data; name="folderViewhash"

0
------------ae0GI3cH2KM7gL6ae0cH2KM7KM7Ij5
Content-Disposition: form-data; name="Filedata"; filename="36.zip"
Content-Type: application/octet-stream

±k¯lÒŸ¤±Õ°&5˜°E±Ê’¸Éa\Ö*³‘aȐ;ÁC9[•::9¤�–k�*§T,"J£§fB9ð´LDEH=Æ<–4ºŒ±?:E�l&h`‡™žÁ»LÎÕ_#;Š!iž¡
#¬6ÖF–t%™ÇÍá¿ßª~H-Y2ÇìÜ{Ö3±¥îêêêêêªêêj6¶¢qôâ¹7"Æ‚ËF^À\£y²ÝÝw°»»ó¡iš/žz݃ý~÷ÄÊûːÜ×Ó+lo^v›
ïØ¢kð„ÝZÔÚ¸Œ7©•ã/|è†CÆ0vûœþ˹v’aìEéÚØKÒ0¾³.á'ciÙ\?§›ïCòz݃ý~÷ÄÊûːÜ×Ó+lo^v›BOIØKÒ0¾³.á'ciI
z݃ý~÷ÄÊûːÜ×Ó+lo^v›BOI:9¤�–k�*§T,"J£§fB9ð´LDEH=Æ<–4ºŒ±?:E�l&h`‡-Y2ÇìÜ{Ö3±¥îêêY2ÇìÜ•ã/|è†C
------------ae0GI3cH2KM7gL6ae0cH2KM7KM7Ij5
Content-Disposition: form-data; name="Upload"

Submit Query
------------ae0GI3cH2KM7gL6ae0cH2KM7KM7Ij5--
The 'funny symbols' you see above are just the raw binary data of the file that is posted above and what I posted is a very small amount of what would be there normally. From this postdata stream, you can build your post array in the Rapidleech plugin script.
$fpost = array();
$fpost['Filename'] = $lname;

//Filefactory needs the ff_membership cookie it sent you when you logged in, so it knows who owns the files you are posting with Rapidleech! :)
$fpost['cookie'] = urldecode(str_replace('ff_membership=', '', $lcook[1]));

//this is the folder we want to put the files in, just leaving it as 0 is ok as the files will be uploaded to the 'Default' filefactory account folder)
$fpost['folderViewhash'] = '0';
$fpost['Upload'] = 'Submit+Query';
Uploading
Uploading the file

Now, we have all the necessary data so we can upload the file. You will need to find the fieldname in the request content that is sent and set that as the fieldname in the upload function, upfile(). It's usually the one that contains the filename, followed by "Content-Type: application/octet-stream" - in this case, 'Filedata':
Content-Disposition: form-data; name="Filedata"; filename="36.zip"
Content-Type: application/octet-stream
Now upload the file:
$upfiles = upfile($url["host"],$url["port"] ? $url["port"] : 80, $url["path"].($url["query"] ? "?".$url["query"] : ""), $upload_form, 0, $fpost, $lfile, $lname, "Filedata");
NOTE: You do have to be careful with how you pass cookies and post arrays along to servers, as you can see above we had to urldecode() the ff_membership cookie, because if you pass it already urlencoded (where is has all %21%22%23 for special characters and so on) then the upload will fail; you can see it 'not urlencoded' if you look at the post request in your http debugger, so that's how we know to urldecode it.

Analysing The Upload Response

Ok, so now we have uploaded the file successfully, the server will return a response into the $upfiles variable. In most sites cases it could be a page returned that gives a download and/or delete link, or it could be a new location: where we have to pass some parameters. You would know this if you use your HTTP catcher to see what the exact case is, because once you know, making Rapidleech do it is the easy part.

We look for the upload response with this code. In filefactory's case, the usual response is a 7-character string, such as 'af81ce3'. We check for that string with preg_match(), but if we can't find it maybe the file wasn't uploaded.
is_page($upfiles);
if (!preg_match('%\r\n\r\n([a-z0-9]{7})$%', $upfiles, $curi)) html_error('Couldn\'t get the download link, but the file might have been uploaded to your account ok');
$completeurl = 'http://www.filefactory.com/file/complete.php/' . $curi[1] . '/';
Retrieving the completion URL

We then tell Rapidleech to request the completed url with the id string attached (the $completeurl). So parse out the completed url, and download it with Rapidleech using the login cookie we got earlier ($lcook[1]) into the $page variable:
$Url = parse_url($completeurl);
$page = geturl($Url["host"], $Url["port"] ? $Url["port"] : 80, $Url["path"].($Url["query"] ? "?".$Url["query"] : ""), 0, $lcook[1], 0, 0, $_GET["proxy"], $pauth);
is_page($page);
is_notpresent($page, 'Upload Complete', 'Error getting download link - The upload probably failed');
Storing the download / delete links

From there, we can get the download link that is returned on the $page. We also have to trim() it because there was space around the download link we want to get rid of after we cut it out. We call the download link $download_link as that's what is written in the upload php to be added to some html files to record our links for uploads (done automatically).
$download_link = trim(cut_str($page, '
', '
'));
Upload Template
Here's a nice template you can use to start from, when creating upload plugins. It has most of the necessary html and php, you can be inventive and swap/create new functions yourself if needed, and there's some descriptions of how and when you'd normally use each function.
 username and password
$site_login = 'username';
$site_pass = 'password';



 /////////////////////////////////////////////////
$not_done=true;
$continue_up=false;
if ($site_login & $site_pass)
{
   $_REQUEST['my_login'] = $site_login;
   $_REQUEST['my_pass'] = $site_pass;
   $_REQUEST['action'] = "FORM";
   echo "Use Default login/pass...\n";
}
if ($_REQUEST['action'] == "FORM")
{
   $continue_up=true;
}
else
{
   echo <<Login to Site