mirror of
https://github.com/curl/curl.git
synced 2024-12-21 06:50:10 +08:00
5a488251f7
- make DEFAULT sections less repetitive - make historic mentions use HISTORY - generate the protocols section on `# %PROTOCOLS%` instead of guessing where to put it - generate the availability section on `# %AVAILABILITY%` instead of guessing where to put it - make the protocols section more verbose Closes #14227
1.9 KiB
1.9 KiB
c | SPDX-License-Identifier | Title | Section | Source | See-also | Protocol | Added-in | |||
---|---|---|---|---|---|---|---|---|---|---|
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. | curl | curl_pushheader_byname | 3 | libcurl |
|
|
7.44.0 |
NAME
curl_pushheader_byname - get a push header by name
SYNOPSIS
#include <curl/curl.h>
char *curl_pushheader_byname(struct curl_pushheaders *h, const char *name);
DESCRIPTION
This is a function that is only functional within a CURLMOPT_PUSHFUNCTION(3) callback. It makes no sense to try to use it elsewhere and it has no function then.
It returns the value for the given header field name (or NULL) for the incoming server push request. This is a shortcut so that the application does not have to loop through all headers to find the one it is interested in. The data this function points to is freed when this callback returns. If more than one header field use the same name, this returns only the first one.
%PROTOCOLS%
EXAMPLE
#include <string.h> /* for strncmp */
static int push_cb(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_cb);
curl_multi_setopt(multi, CURLMOPT_PUSHDATA, &counter);
}
%AVAILABILITY%
RETURN VALUE
Returns a pointer to the header field content or NULL.