70 lines
1.5 KiB
Markdown
70 lines
1.5 KiB
Markdown
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---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: curl_pushheader_bynum
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Section: 3
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Source: libcurl
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See-also:
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- CURLMOPT_PUSHFUNCTION (3)
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- curl_pushheader_byname (3)
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---
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# NAME
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curl_pushheader_bynum - get a push header by index
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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char *curl_pushheader_bynum(struct curl_pushheaders *h, size_t num);
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~~~
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# DESCRIPTION
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This is a function that is only functional within a
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CURLMOPT_PUSHFUNCTION(3) callback. It makes no sense to try to use it
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elsewhere and it has no function then.
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It returns the value for the header field at the given index **num**, for
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the incoming server push request or NULL. The data pointed to is freed by
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libcurl when this callback returns. The returned pointer points to a
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"name:value" string that gets freed when this callback returns.
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# EXAMPLE
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~~~c
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/* output all the incoming push request headers */
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static int push_cb(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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int i = 0;
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char *field;
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do {
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field = curl_pushheader_bynum(headers, i);
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if(field)
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fprintf(stderr, "Push header: %s\n", field);
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i++;
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} while(field);
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return CURL_PUSH_OK; /* permission granted */
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}
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int main(void)
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{
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CURLM *multi = curl_multi_init();
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curl_multi_setopt(multi, CURLMOPT_PUSHFUNCTION, push_cb);
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}
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~~~
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# AVAILABILITY
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Added in 7.44.0
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# RETURN VALUE
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Returns a pointer to the header field content or NULL.
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