83 lines
1.9 KiB
Markdown
83 lines
1.9 KiB
Markdown
|
---
|
||
|
|
c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
|
||
|
|
SPDX-License-Identifier: curl
|
||
|
|
Title: curl_pushheader_byname
|
||
|
|
Section: 3
|
||
|
|
Source: libcurl
|
||
|
|
See-also:
|
||
|
|
- CURLMOPT_PUSHFUNCTION (3)
|
||
|
|
- curl_pushheader_bynum (3)
|
||
|
|
---
|
||
|
|
|
||
|
|
# NAME
|
||
|
|
|
||
|
|
curl_pushheader_byname - get a push header by name
|
||
|
|
|
||
|
|
# SYNOPSIS
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
#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.
|
||
|
|
|
||
|
|
# EXAMPLE
|
||
|
|
|
||
|
|
~~~c
|
||
|
|
#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
|
||
|
|
|
||
|
|
Added in 7.44.0
|
||
|
|
|
||
|
|
# RETURN VALUE
|
||
|
|
|
||
|
|
Returns a pointer to the header field content or NULL.
|