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67 lines
1.7 KiB
Groff
67 lines
1.7 KiB
Groff
.\" generated by cd2nroff 0.1 from CURLMOPT_PUSHDATA.md
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.TH CURLMOPT_PUSHDATA 3 "2024-08-02" libcurl
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.SH NAME
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CURLMOPT_PUSHDATA \- pointer to pass to push callback
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_PUSHDATA, void *pointer);
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.fi
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.SH DESCRIPTION
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Set a \fIpointer\fP to pass as the last argument to the
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\fICURLMOPT_PUSHFUNCTION(3)\fP callback. The pointer is not touched or used by
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libcurl itself, only passed on to the callback function.
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.SH DEFAULT
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NULL
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.SH PROTOCOLS
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This functionality affects http only
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.SH EXAMPLE
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.nf
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#include <string.h>
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/* only allow pushes for filenames starting with "push-" */
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int push_callback(CURL *parent,
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CURL *easy,
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size_t num_headers,
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struct curl_pushheaders *headers,
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void *clientp)
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{
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char *headp;
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int *transfers = (int *)clientp;
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FILE *out;
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headp = curl_pushheader_byname(headers, ":path");
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if(headp && !strncmp(headp, "/push-", 6)) {
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fprintf(stderr, "The PATH is %s\\n", headp);
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/* save the push here */
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out = fopen("pushed-stream", "wb");
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/* write to this file */
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curl_easy_setopt(easy, CURLOPT_WRITEDATA, out);
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(*transfers)++; /* one more */
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return CURL_PUSH_OK;
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}
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return CURL_PUSH_DENY;
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}
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int main(void)
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{
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int counter;
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CURLM *multi = curl_multi_init();
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curl_multi_setopt(multi, CURLMOPT_PUSHFUNCTION, push_callback);
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curl_multi_setopt(multi, CURLMOPT_PUSHDATA, &counter);
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}
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.fi
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.SH AVAILABILITY
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Added in curl 7.44.0
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.SH RETURN VALUE
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Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.
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.SH SEE ALSO
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.BR CURLMOPT_PIPELINING (3),
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.BR CURLMOPT_PUSHFUNCTION (3),
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.BR CURLOPT_PIPEWAIT (3),
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.BR RFC 7540
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