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C – Sending HTTP GET request

Dec 21st, 2012 by 




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BOOL SendHTTPGet(char *pHostname, char *pURI, char *pUserAgent)
{
  BOOL lRetVal = FALSE;
  HINTERNET lInetInit = NULL;
  HINTERNET lInetConn = NULL; 
  HINTERNET lInetReq = NULL;
  DWORD lBytesRead;
  char lTemp[MAX_BUF_SIZE + 1];
 
 
  if (pHostname != NULL && pURI != NULL)
  {
    if (pUserAgent == NULL)
      pUserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/525.19 (KHTML, like Gecko) Chrome/0.2.153.1 Safari/525.19";
 
    if ((lInetInit = InternetOpen (pUserAgent, INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0))
        != NULL)
    {
      if ((lInetConn = InternetConnect(lInetInit, pHostname, INTERNET_DEFAULT_HTTP_PORT, 
          NULL,NULL,INTERNET_SERVICE_HTTP, 0, 0)) != NULL)
      {
        if ((lInetReq = HttpOpenRequest(lInetConn, "GET", pURI, NULL, NULL, NULL, 0, 0))
           != NULL)
        {
          if (HttpSendRequest(lInetReq, NULL, 0, NULL, 0))
          {
            lRetVal = TRUE;
            ZeroMemory(lTemp, sizeof(lTemp));
            while (InternetReadFile(lInetReq, lTemp, MAX_BUF_SIZE, &lBytesRead))
            {
              printf("> %s\n", lTemp);
 
              ZeroMemory(lTemp, sizeof(lTemp));
 
              if(lBytesRead < 1)
                break;
            } // while (InternetRead...
          } // if(HttpSendReque...
          InternetCloseHandle(lInetReq);
        } // if ((lInetReq...
        InternetCloseHandle(lInetConn);
      } // if ((lInetCo...
      InternetCloseHandle(lInetInit);
    } // if ((lInetIn..
  } // if (pHostn...
 
  return(lRetVal);
}


posted in C