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