Login Program

Hi,
well what I am trying to achieve, is to develope a program that can
log into my eBay account.

I was sure that they would use some weird ways to pass the login names and so on, but I didn't think it would be this hard to realize or to figure out.
Well what I have done so far is to connect to ebay send them a POST with the login data and some more stuff they require and then download the html source of the page I get redirected to. But I don't get further than the part before the redirection.

I have used this code on different pages and it works there but I just can't figure this out.

I'm using cUrl for internet code (e.g. downloading source to memory, send POSTs, etc.)

Code:

#include <stdio.h>
#include <curl.h>

...

int main(void)
{
  CURL *curl;
  CURL *curl2;
  CURLcode res;
  
  FILE *file = fopen("test.txt", "w");
  
  struct MemoryStruct chunk;

  chunk.memory=NULL; /* we expect realloc(NULL, size) to work */
  chunk.size = 0;    /* no data at this point */

  curl_global_init(CURL_GLOBAL_ALL);

  curl = curl_easy_init();
  curl2 = curl_easy_init();
  
  /* First set the URL that is about to receive our POST. This URL can
     just as well be a https:// URL if that is what should receive the
     data. */
  curl_easy_setopt(curl, CURLOPT_URL, "http://www.ebay.de");
  
  /* Now specify additional HTTP Header data */
  //curl_easy_setopt(curl, CURLOPT_HTTPHEADER, 
        "Location: /eBayISAPI.dll?MyEbaySellingSoldListings"
        "&ssPageName=STRK:ME:LNLK");

  /* Now specify the POST data */
  curl_easy_setopt(curl, CURLOPT_POSTFIELDS, 
        "MfcISAPICommand=SignInWelcome&siteid=77"
        "&co_partnerId=2&UsingSSL=1"
        "&ru=http%3a%2f%2fmy%2eebay%2ede%3a80%2fws%2feBay"
        "ISAPI%2edll%3fMyeBay"
        "&ssPageName=h%3Ah%3Amebay%3ADE&i1=%2d1&pageType=1883"
        "&userid=EBAY_LOGIN_NAME&pass=PASSWORD&signinButton=Sicheres+Einloggen+&gt;"
        "&keepMeSignInOption=1");

  /* some servers don't like requests that are made without a user-agent
     field, so we provide one */
  curl_easy_setopt(curl, CURLOPT_USERAGENT, "libcurl-agent/1.0");
  
  //curl_easy_setopt(curl, CURLOPT_HTTPGET,
         "ws/eBayISAPI.dll?MyEbaySellingSoldListings&ssPageName=STRK:ME:LNLK");
  
  /* send all data to this function  */
  curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);

  /* we pass our 'chunk' struct to the callback function */
  curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&chunk);
  
  /* get it! */
  curl_easy_perform(curl);

  /* always cleanup */
  curl_easy_cleanup(curl);
 
  printf("%d", sizeof(chunk.size));
  system("pause");
  fprintf(file, "%s", chunk.memory);
  system("pause");  
  //fprintf(
  return 0;
}

Have any of you tried/done anything like this?
Any information or tips are appreciated.

Easiest thing to do is grab a copy of ethereal (www.ethereal.com) and use it to watch what your browser does.
Then do the same thing in your curl program.

Keep in mind that alot of sites will not allow you to send login information unless it sent from the website itself. This could well be the case with a large site such as ebay.

Hint, make your program behave like a browser.