NAME¶

CURLMOPT_PUSHDATA - pointer to pass to push callback

SYNOPSIS¶

#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_PUSHDATA, void *pointer);

DESCRIPTION¶

Set a pointer to pass as the last argument to the CURLMOPT_PUSHFUNCTION(3) callback. The pointer is not touched or used by libcurl itself, only passed on to the callback function.

DEFAULT¶

NULL

PROTOCOLS¶

This functionality affects http only

EXAMPLE¶

#include <string.h>
/* only allow pushes for filenames starting with "push-" */
int push_callback(CURL *parent,


                  CURL *easy,


                  size_t num_headers,


                  struct curl_pushheaders *headers,


                  void *clientp)
{


  char *headp;


  int *transfers = (int *)clientp;


  FILE *out;


  headp = curl_pushheader_byname(headers, ":path");


  if(headp && !strncmp(headp, "/push-", 6)) {


    fprintf(stderr, "The PATH is %s\n", headp);


    /* save the push here */


    out = fopen("pushed-stream", "wb");


    /* write to this file */


    curl_easy_setopt(easy, CURLOPT_WRITEDATA, out);


    (*transfers)++; /* one more */


    return CURL_PUSH_OK;


  }


  return CURL_PUSH_DENY;
}
int main(void)
{


  int counter;


  CURLM *multi = curl_multi_init();


  curl_multi_setopt(multi, CURLMOPT_PUSHFUNCTION, push_callback);


  curl_multi_setopt(multi, CURLMOPT_PUSHDATA, &counter);
}

AVAILABILITY¶

Added in curl 7.44.0

RETURN VALUE¶

Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.

SEE ALSO¶

CURLMOPT_PIPELINING(3), CURLMOPT_PUSHFUNCTION(3), CURLOPT_PIPEWAIT(3), RFC7540