I would really like to be able to log my POST requests, but when I use CURLOPT_VERBOSE and CURLOPT_STDERR below, the file is always empty.
 
Is this supported?
 
     -dp-
 
#define DEBUG 1 #force it to be true...using -DDEBUG in makefile had no effect

/* Adapted from http://curl.haxx.se/libcurl/c/libcurl-tutorial.html#Upload
 * and http://curl.haxx.se/libcurl/c/libcurl-tutorial.html#HTTP
 * and http://curl.haxx.se/lxr/source/docs/examples/postit2.c
 * with guidance from http://curl.siamu.ac.th/libcurl/c/curl_formadd.html
 */
bool bUploadFileViaPOST( const char *sURL,
                         const char *sTransactionID,
                         const char *sFilePathOnLocalMachine,
                         const char *sFileContents,
                         const unsigned int uiNumBytesToUpload )
{
  CURL *curl_handle;
  bool bOK = false;
  struct curl_httppost *pStartOfPOSTPayload = NULL;
  struct curl_httppost *pEndOfPOSTPayload = NULL;
#ifdef DEBUG
  FILE *pFile = fopen("CURL_POST.log", "w");
#endif
  /*curl_global_init(CURL_GLOBAL_ALL); done for us, according to http://curl.siamu.ac.th/libcurl/c/curl_global_init.html */

  /* Make an initial payload section called "trans" that contains only the transaction ID */
  curl_formadd(&pStartOfPOSTPayload,
               &pEndOfPOSTPayload,
               CURLFORM_COPYNAME, "trans",
               CURLFORM_COPYCONTENTS, sTransactionID,
               CURLFORM_END);
  /* Fill in the filename field */
  curl_formadd(&pStartOfPOSTPayload,
               &pEndOfPOSTPayload,
               CURLFORM_COPYNAME, "upload",
               CURLFORM_BUFFER, sFilePathOnLocalMachine, /* filename to give to buffer contents upon upload */
               CURLFORM_BUFFERPTR, sFileContents,
               CURLFORM_BUFFERLENGTH, (long) uiNumBytesToUpload,
               CURLFORM_END);

  curl_handle = curl_easy_init();
  if (curl_handle) {
    curl_easy_setopt(curl_handle, CURLOPT_HTTPPOST, pStartOfPOSTPayload);
    /* for thread safety; done once per handle */
    curl_easy_setopt(curl_handle, CURLOPT_NOSIGNAL, true);
    /* what URL that receives this POST */
    curl_easy_setopt(curl_handle, CURLOPT_URL, sURL);
    /* some servers don't like requests that are made without a user-agent
       field, so we provide one */
    curl_easy_setopt(curl_handle, CURLOPT_USERAGENT, "libcurl-agent/1.0");

#ifdef DEBUG
    curl_easy_setopt(curl_handle, CURLOPT_VERBOSE, true);
    curl_easy_setopt(curl_handle, CURLOPT_STDERR, pFile);
#endif
    bOK = (curl_easy_perform(curl_handle) == CURLE_OK);
    /* always cleanup */
    curl_easy_cleanup(curl_handle);
    /* then cleanup the pStartOfPOSTPayload chain */
    curl_formfree(pStartOfPOSTPayload);
  }
  return bOK;
}
Received on 2004-10-14