On Wed, Jul 7, 2010 at 10:57 AM, Alfred Gebert <alfred.gebert_at_gmail.com> wrote:
> On Tue, Jul 6, 2010 at 7:10 PM, Daniel Stenberg <daniel_at_haxx.se> wrote:
>> On Tue, 6 Jul 2010, Alfred Gebert wrote:
>>
>>> I am using libcurl 7.19.4 on Windows XP and I want to call a HTTP PUT
>>> operation around 8000 times. After about 4000 requests curl_easy_perform()
>>> returns with error 7 (CURLE_COULDNT_CONNECT, Couldn't Connect Error, Address
>>> already in use).
>>
>> While the reason sounds a bit strange, it certainly sounds as if you're
>> simply draining the resources from the target server so that you then can't
>> connect to it anymore. The error 7 is a failed TCP connection.
>>
>
> The target server is my own program serving SOAP requests. The client
> and the target server are running on the same machine.
> I have no errors on the target server.
>
> I will retest using Apache httpd as target server and running the
> libcurl program on Linux.
>

I retested it with a simpler program executing a HTTP GET.

The target server is Apache httpd on Linux. The libcurl client on
Windows XP fails again (result 7 of curl_easy_perform(). Running the
libcurl client on Linux (OpenSuse 11.2 x86) is fine.

So in my opinion there is a limitation of libcurl running on Windows XP.

If you want to run the program you have to change the target server URL.

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

size_t write_callback( void* Buffer, size_t BufferSize, size_t
BufferCount, void* Stream)
{
        /* do nothing */
        
        return( BufferSize * BufferCount);
}

int main(void)
{
  CURL *curl;
  CURLcode res;

  /* In windows, this will init the winsock stuff */
  curl_global_init(CURL_GLOBAL_ALL);

  for( int i=0; i < 10000; i++)
  {
          curl = curl_easy_init();
          if(curl) {
                  curl_easy_setopt(curl, CURLOPT_URL, "http://gebert4.e2e.ch:1884/");
                  curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);

                  res = curl_easy_perform(curl);
                
                  if( res != 0)
                  {
                          printf( "%d request failed: %d\n", i+1, res);
                          return -1;
                  }
                
                  /* simple progress bar */
                  printf( ".");
                
                  /* always cleanup */
                  curl_easy_cleanup(curl);
          }
          else
          {
                  printf( "init failed\n");
                  return -2;
          }
  }

  curl_global_cleanup();

  return 0;
}
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Received on 2010-07-07