Hi,
I still could not solve the problem of PUT operation.
What I want to do is, I want to implement my own call-back function and
pass a function pointer to it.

      curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback);
      curl_easy_setopt(curl, CURLOPT_READDATA,pData);
And want the program to read from this pData..

For clarity sake.. In the following program, I am not passing pData
also. Just taking some local string and want to pass the same. Can
anyone please help me to find out the prob, or I am missing something.
Remote file is just getting populated with some junk data.

This is what I have done:

 #include <stdio.h>
  #include <fcntl.h>
  #include <sys/stat.h>
  #include <unistd.h>
  #include <string.h>
  #include <curl/curl.h>
  #include <stdlib.h>

char buff[30];
char pData[3]={'T','A','M'};

int count=0;
  static size_t read_callback(void *ptr, size_t size, size_t nmemb, void
*stream)
  {
            size_t retcode=0;
        char buff1[10]="TAMAL TAN";
        ptr=buff1;//want to populate ptr using data from char buffer.
        if(count != 0)
        {
                printf("returning 0");
                return 0;
        }
        count++;
        size=1;
        nmemb=9;//NOT including NULL character.

        printf("\n************before**********\n");
        printf("size = %d\n",size);
        printf("nmemb = %d\n",nmemb);
        printf("stream= %p\n",stream);
        printf("ptr= %p\n",ptr);

        // retcode = fread(ptr, size, nmemb,(FILE *)stream);
        // Not using fread operation. wants to read it from buffer
itself.
        printf("\n***************after**********\n");
        printf("size = %d\n",size);
        printf("nmemb = %d\n",nmemb);
        printf("stream= %p\n",stream);
        printf("ptr= %p\n",ptr);

        return 9;

  }

  int main(int argc, char **argv)
  {
    CURL *curl;
    CURLcode res;
    FILE * hd_src ;
    int hd ;
    struct stat file_info;

    char *file;
    char *url;

    file="a.txt";
    url ="http://10.203.37.4/xcap-root/rls-services/users/prav/index1";
    hd_src = fopen(file, "rb");
    curl_global_init(CURL_GLOBAL_ALL);
    curl = curl_easy_init();
    if(curl) {
      curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
     //curl_easy_setopt(curl, CURLOPT_PUT, 1L);
      curl_easy_setopt(curl, CURLOPT_URL, url);
      /* we want to use our own read function */
      curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback);
      // will not pass any data.. for testing will be passing data from
the callback itself.
      //curl_easy_setopt(curl, CURLOPT_READDATA,pData);
      /* Now run off and do what you've been told! */
      res = curl_easy_perform(curl);
      /* always cleanup */
     curl_easy_cleanup(curl);
   }
   fclose(hd_src); /* close the local file */
   curl_global_cleanup();
   return 0;
}

The program is writing some garbage in the remote URI. Please suggest.

Thanks & Regards
Tamal Tanu Biswas

------------------------------

Message: 4
Date: Wed, 24 Dec 2008 08:17:30 -0800
From: Dan Fandrich <dan_at_coneharvesters.com>
Subject: Re: How to PUT data char buffer??
To: curl-library_at_cool.haxx.se
Message-ID: <20081224161729.GA20667_at_coneharvesters.com>
Content-Type: text/plain; charset=us-ascii

On Wed, Dec 24, 2008 at 05:47:09PM +0530, tamal.biswas_at_wipro.com wrote:
> Hi,
> I am able to pass function pointer to the callback function and do the

> PUT operation. but I actually need to pass char buffer. How can I do
> the same without using any file mechanism.

Take a look at the getinmemory.c example program and do something
similar, in reverse. Basically, you just keep a pointer around which
always points to the current location in the data to send.

>>> Dan

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