Hi,

    Please may i know what does this core in CURL mean ? My function,
get_url_content_from_web is calling the curl_perform() function. I have 30
threads and the core as well as my function is given below. I had disabled
the TIMEOUT option. (What then will it take the default timeout as ?)

bash-2.03$ gdb mgateway core
GNU gdb 5.0
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This GDB was configured as "sparc-sun-solaris2.8"...(no debugging symbols
found)...

warning: exec file is newer than core file.
Core was generated by `./mgateway'.
Program terminated with signal 9, Killed.
Reading symbols from /usr/lib/libpthread.so.1...(no debugging symbols
found)...done.
Loaded symbols for /usr/lib/libpthread.so.1
Reading symbols from /usr/local/lib/libgdbm.so.2...(no debugging symbols
found)...done.
Loaded symbols for /usr/local/lib/libgdbm.so.2
Reading symbols from /usr/local/lib/libcurl.so.2...done.
Loaded symbols for /usr/local/lib/libcurl.so.2
Reading symbols from /usr/lib/libdl.so.1...done.
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Reading symbols from /usr/lib/libsocket.so.1...done.
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Reading symbols from /oracle/oracle8i/lib/libclntsh.so.8.0...done.
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Reading symbols from /oracle/oracle8i/lib/libwtc8.so...done.
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Reading symbols from /usr/local/lib/libgcc_s.so.1...done.
Loaded symbols for /usr/local/lib/libgcc_s.so.1
Reading symbols from /usr/lib/libmp.so.2...done.
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Reading symbols from /usr/lib/libaio.so.1...done.
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Reading symbols from
/usr/platform/SUNW,Sun-Fire-280R/lib/libc_psr.so.1...done.
Loaded symbols for /usr/platform/SUNW,Sun-Fire-280R/lib/libc_psr.so.1
Reading symbols from /usr/lib/libthread.so.1...done.
Loaded symbols for /usr/lib/libthread.so.1
#0 Curl_pgrsUpdate (conn=0x13ca58) at progress.c:193
193 int nowindex = data->progress.speeder_c% CURR_TIME;
(gdb) where
#0 Curl_pgrsUpdate (conn=0x13ca58) at progress.c:193
#1 0xff3246d0 in Transfer (c_conn=0x13ca58) at transfer.c:848
#2 0xff325690 in Curl_perform (data=0x34ce30) at transfer.c:933
#3 0x1dac4 in get_url_content_from_web ()
#4 0x1f9d0 in process_curl_queue ()
#5 0x3072c in start_read_curl_queue_thread ()
(gdb) bt
#0 Curl_pgrsUpdate (conn=0x13ca58) at progress.c:193
#1 0xff3246d0 in Transfer (c_conn=0x13ca58) at transfer.c:848
#2 0xff325690 in Curl_perform (data=0x34ce30) at transfer.c:933
#3 0x1dac4 in get_url_content_from_web ()
#4 0x1f9d0 in process_curl_queue ()
#5 0x3072c in start_read_curl_queue_thread ()
(gdb)

  struct MemoryStruct {
    unsigned char *memory;
    size_t size;
  };

  typedef struct CURL_MEM CURL_MEM;
 struct CURL_MEM {
  int err_no;
  struct MemoryStruct mems;
 };

  size_t WriteMemoryCallback(void *ptr, size_t size, size_t nmemb, void
*data)
  {
    register int realsize = size * nmemb;
    struct MemoryStruct *mem = (struct MemoryStruct *)data;

    mem->memory = (char *)realloc(mem->memory, mem->size + realsize + 1);
    if (mem->memory) {
     memcpy(&(mem->memory[mem->size]), ptr, realsize);
      mem->size += realsize;
      mem->memory[mem->size] = 0;
   }
    return realsize;
 }

CURL_MEM get_url_content_from_web(unsigned char * url_to_be_fetched, int
timeout, int answer)
{
   CURL *curl_handle;
   CURLcode res;
   //char * http_header=NULL;
   char http_header[HEADER_SIZE];
   char * http_body=NULL;

   struct MemoryStruct chunk;
   CURL_MEM curl_mem;

   char http[20];
   int status;

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

    log_debug(LOG_DEBUG_LEVEL,"In get_url_content_from_web with url(%s)\n",
url_to_be_fetched);
 //printf("URL to be retrieved by CURL is %s\n",url_to_be_fetched);

    // init the curl session
    curl_handle = curl_easy_init();

 // specify URL to get
    curl_easy_setopt(curl_handle, CURLOPT_URL, url_to_be_fetched);
 // Set option for HTTP Headers
 curl_easy_setopt(curl_handle, CURLOPT_VERBOSE, TRUE);
 curl_easy_setopt(curl_handle, CURLOPT_HEADER, TRUE);
 //Set follow-up if the page is redirected
 curl_easy_setopt(curl_handle, CURLOPT_FOLLOWLOCATION, 2);
 //Set conn. timeout (Trying after commenting out)
 //curl_easy_setopt(curl_handle, CURLOPT_CONNECTTIMEOUT, timeout);
 // WMCB collects the URL content into a buffer
 curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);

    // we pass our 'chunk' struct to the callback function
    curl_easy_setopt(curl_handle, CURLOPT_FILE, (void *)&chunk);

    // get it!
 printf("------>Before CURL Perform\n");
     res = curl_easy_perform(curl_handle);
  printf("------>After CURL Perform\n");
 curl_mem.err_no = res;

 // cleanup curl stuff originally it was here
    //curl_easy_cleanup(curl_handle);
 printf("Checking if res == 0\n");
  if(res != 0)//Could be some CURL error
  {
   printf("In res !=0\n");
   chunk.memory = (unsigned char *) malloc (ERROR_SIZE);
   bzero(chunk.memory,ERROR_SIZE);
   log_debug(LOG_DEBUG_LEVEL, "::TRACK_CURL_ERR::res(%d)\n" ,res);
   strcpy(chunk.memory,curl_error_codes(res));
   chunk.size = strlen(chunk.memory);
   goto END;
  }

 printf("Checking if answer or chunk is NULL\n");
 //If no SMS response is asked or the chunk has nothing
 if((answer == 0) || (chunk.size == 0) || (chunk.memory == NULL))
 {
  printf("In answer/chunk null\n");
  chunk.memory = (unsigned char *) malloc (strlen("ok")+1);
  bzero(chunk.memory, strlen("ok")+1);
  log_debug(LOG_DEBUG_LEVEL, "::TRACK_CHUNK_ANS_NULL::res(%d)\n" ,res);
  strcpy(chunk.memory, "ok");
  chunk.size = strlen(chunk.memory);
  printf("Either answer(0) or chunk is null\n");
  goto END;
 }

   printf("Chunk size is %d\n",chunk.size);
 //Trying static allocation
 //http_header = (char *) malloc (HEADER_SIZE);
 bzero(http_header, HEADER_SIZE);

STRIP_HEAD:
 printf("Under strip head tag\n");
 sscanf(chunk.memory, "%[^\r\n]", http_header);
 printf("#### HTTP HEADER (%s)\n", http_header);

 http_body = (char *)strstr(chunk.memory, "\r\n\r\n");
 if(http_body == NULL) {
  chunk.memory = (unsigned char *) malloc (strlen("ok")+1);
  bzero(chunk.memory, strlen("ok")+1);
  strcpy(chunk.memory,"ok");
  chunk.size = strlen(chunk.memory);

 } else {
  printf("Getting http_header\n");
  sscanf(http_header,"%s %d",http,&status);

   printf("Header is %s and status is %d\n",http,status);
  if(status >= 301 && status <= 304) {
    printf("The header status is ########### %d ############\n",status);
   chunk.memory = (unsigned char *) malloc (strlen(http_body)+1);
   bzero(chunk.memory, strlen(http_body)+1);
   strcpy(chunk.memory, http_body+strlen("\r\n\r\n"));
   chunk.size = strlen(chunk.memory);
   goto STRIP_HEAD;
  } else if(status == 200 || status == 202) { //Success
   chunk.memory = (unsigned char *) malloc (strlen(http_body)+1);
   bzero(chunk.memory, strlen(http_body)+1);
   strcpy(chunk.memory, http_body+strlen("\r\n\r\n"));
   chunk.size = strlen(chunk.memory);
   printf("#### HTTP BODY Chunk size (%d) and content (%s)\n", chunk.size,
chunk.memory);
   if(chunk.size == 0) {
              chunk.memory = (unsigned char *) malloc (strlen("ok")+1);
              bzero(chunk.memory, strlen("ok")+1);
                 strcpy(chunk.memory,"ok");
                 chunk.size = strlen(chunk.memory);
            }
  } else if(status >= 1 && status <= 52) { //CURL Errors
   chunk.memory = (unsigned char *) malloc (ERROR_SIZE);
   bzero(chunk.memory,ERROR_SIZE);
   strcpy(chunk.memory,curl_error_codes(status));
   chunk.size = strlen(chunk.memory);
  } else {
   chunk.memory = (unsigned char *) malloc (strlen(http_header)+1);
   bzero(chunk.memory,strlen(http_header)+1);
   strcpy(chunk.memory, http_header);
   chunk.size = strlen(chunk.memory);
  }
 }

END:
 printf("Copying chunk.memory and chunk.size\n");
  curl_mem.mems.memory = chunk.memory;
  curl_mem.mems.size = chunk.size;

 //Trying to cleanup curl at the end
  curl_easy_cleanup(curl_handle);
 return(curl_mem);
}

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Received on 2002-09-27