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CURLMOPT_PUSHDATA(3) Library Functions Manual CURLMOPT_PUSHDATA(3) 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 curl_multi_setopt(3) returns a CURLMcode indicating success or error. CURLM_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3). SEE ALSO CURLMOPT_PIPELINING(3), CURLMOPT_PUSHFUNCTION(3), CURLOPT_PIPEWAIT(3), RFC7540 libcurl 2026-06-11 CURLMOPT_PUSHDATA(3)
NAME | SYNOPSIS | DESCRIPTION | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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