Thanx guys for I surely do not feel lost anymore, with the support am
receiving. Here is a snippet of the code am running on a solaris box. I have
removed the rest of the code thinking it might be a little difficult for you
to read it.

1. I call the curl easy option to register the callback
curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION,
VIPClient::WriteMemoryCallbackWrapper);

2. From my callback routine, I dump the data in a file as shown in the
function below

size_t VIPClient::WriteMemoryCallbackWrapper(void *buffer, size_t
size,size_t nmemb, void *stream)
{
        FILE* fd=fopen("ImageFile.txt","a");
          setvbuf(fd,NULL,_IONBF,0); /* Unbuffered mode for fwrite */
          return fwrite(buffer, size, nmemb, fd);
}

3. Once done, I read the buffer in a character array and pass it on to a
function which strips of first 11 bytes. The first 11 bytes which is always
set to "|DELIMITER|" is a kind of header tag indicating the beginning of
binary data.

         FILE* fd=fopen("ImageFile.txt","r");
          if(!fd)
            {
              /* Log error. */
            }
                char *cptrServerResponse = new char [BUFF];
              int NumberOfBytesForImages=fread(cptrServerResponse,
sizeof(char),BUFF_SWAP,fd);
            cout<<endl<<"Number of bytes read "<<NumberOfBytesForImages;
                  cptrServerResponse[NumberOfBytesForImages]='\0';
                  fclose(fd);
        }

        /* This function strips off the first 11 bytes tag "|DELIMITER|" */
      int ProcessXmlStat = ProcessServerResponse(cptrServerResponse);

It just struck my mind. Could there be a problem because am trying to read
from the file in a character array which actually truncates one of the bytes
thus corrupting the data. (Just a wild guess!)

Gracias,
amit

-----Original Message-----
From: Linus Nielsen Feltzing [mailto:linus_at_haxx.se]
Sent: Friday, October 31, 2003 12:07 PM
To: curl-library_at_lists.sourceforge.net
Subject: Re: Problem with binary data

Sharma, Amit wrote:
> If there is any problem in my callback, does anybody has some
> suggestions on debugging tips for something for this.

You could of course let us see the code. Could you describe a little
better how the data is garbled?

Linus

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Received on 2003-10-31