curl problem

[cnu_sree]

iam reading the web page using curl socket.
but some of my data lost.
code:

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

size_t write_data_balance(void *buffer, size_t size, size_t nmemb, void *userp);
int main(void)
{
  CURL *curl;
  CURLcode res;


  curl = curl_easy_init();
  if(curl) {
  curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data_balance);
    curl_easy_setopt(curl, CURLOPT_URL, "http://yahoo.com");
	 res = curl_easy_perform(curl); 
	// curl_easy_cleanup(curl);

  }
  return 0;
}

size_t write_data_balance(void *buffer, size_t size, size_t nmemb, void *userp)
{
       char *response;
        response = (char*)buffer;
	    
printf("*********** &#37;s \n",response);

}

some of my data lost
how can i get full data.
thank u,sree

[Salem]

Well you're printing userp, not buffer.
And you're also ignoring the length of the data, and instead assuming that it ends in \0.

[cnu_sree]

sorry
i forget to change i tried to print buffer only.

[Salem]

Reading the manual page is a wonderful thing, you should try it sometime.

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

size_t write_data_balance(void *buffer, size_t size, size_t nmemb, void *userp);
int main(void)
{
  CURL *curl;
  CURLcode res;

  curl = curl_easy_init();
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_VERBOSE, 1 ); /* DEBUG - for those who RTFM */
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data_balance);
    curl_easy_setopt(curl, CURLOPT_URL, "http://yahoo.com");
    res = curl_easy_perform(curl); 
    curl_easy_cleanup(curl);
  }
  return 0;
}

size_t write_data_balance(void *buffer, size_t size, size_t nmemb, void *userp)
{
    char *response;
    response = (char*)buffer;
    /* NOT \0 terminated, so use the passed size information */
    printf("*********** %.*s\n",size*nmemb,response);
    return size * nmemb; /* V.Important */
}





$ gcc new.c -lcurl
$ ./a.exe
* About to connect() to yahoo.com port 80 (#0)
*   Trying 66.94.234.13... * connected
* Connected to yahoo.com (66.94.234.13) port 80 (#0)
> GET / HTTP/1.1
Host: yahoo.com
Accept: */*

< HTTP/1.1 301 Moved Permanently
< Date: Fri, 26 Oct 2007 15:03:39 GMT
< Location: http://www.yahoo.com/
< Connection: close
< Transfer-Encoding: chunked
< Content-Type: text/html; charset=utf-8
<
*********** The document has moved <A HREF="http://www.yahoo.com/">here</A>.<P>
<!-- p1.rc.scd.yahoo.com uncompressed/chunked Fri Oct 26 08:03:39 PDT 2007 -->

* Closing connection #0

[cnu_sree]

thank u it's working fine.
but one small problem
i want all the data in one variable.
so how it will be possible.

[Salem]

Well you use the userp variable to point to some kind of thing which you can use to accumulate the whole string, through repeated calls to your callback function.

It's in the manual.