CURLOPT_STREAM_WEIGHT(3) Library Functions Manual CURLOPT_STREAM_WEIGHT(3)
NAME
CURLOPT_STREAM_WEIGHT - numerical stream weight
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_STREAM_WEIGHT, long weight);
DESCRIPTION
Set the long weight to a number between 1 and 256.
When using HTTP/2, this option sets the individual weight for this
particular stream used by the easy handle. Setting and using weights
only makes sense and is only usable when doing multiple streams over
the same connections, which thus implies that you use
CURLMOPT_PIPELINING(3).
This option can be set during transfer and causes the updated weight
info get sent to the server the next time an HTTP/2 frame is sent to
the server.
See section 5.3 of RFC 7540 for protocol details.
Streams with the same parent should be allocated resources
proportionally based on their weight. If you have two streams going,
stream A with weight 16 and stream B with weight 32, stream B gets two
thirds (32/48) of the available bandwidth (assuming the server can send
off the data equally for both streams).
DEFAULT
16
PROTOCOLS
This functionality affects http only
EXAMPLE
int main(void)
{
CURL *curl = curl_easy_init();
CURL *curl2 = curl_easy_init(); /* a second handle */
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/one");
curl_easy_setopt(curl, CURLOPT_STREAM_WEIGHT, 10L);
/* the second has twice the weight */
curl_easy_setopt(curl2, CURLOPT_URL, "https://example.com/two");
curl_easy_setopt(curl2, CURLOPT_STREAM_WEIGHT, 20L);
/* then add both to a multi handle and transfer them */
}
}
AVAILABILITY
Added in curl 7.46.0
RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
if not.
SEE ALSO
CURLMOPT_PIPELINING(3), CURLOPT_PIPEWAIT(3), CURLOPT_STREAM_DEPENDS(3),
CURLOPT_STREAM_DEPENDS_E(3)
libcurl 2024-12-12 CURLOPT_STREAM_WEIGHT(3)
curl 8.11.1 - Generated Sat Dec 14 14:21:13 CST 2024