curlopt_stream_weight(3) [mojave man page]

CURLOPT_STREAM_WEIGHT(3)				     curl_easy_setopt options					  CURLOPT_STREAM_WEIGHT(3)

NAME

       CURLOPT_STREAM_WEIGHT - set 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_PIPE-
       LINING(3).

       This  option  can be set during transfer and will then cause the updated weight info get sent to the server the next time a HTTP/2 frame is
       sent to the server.

       See section 5.3 of RFC 7540 for protocol details: https://httpwg.github.io/specs/rfc7540.html#StreamPriority

       Streams with the same parent should be allocated resources proportionally based on their weight. So if you have two streams going, stream A
       with  weight  16 and stream B with weight 32, stream B will get two thirds (32/48) of the available bandwidth (assuming the server can send
       off the data equally for both streams).

DEFAULT

       If nothing is set, the HTTP/2 protocol itself will use its own default which is 16.

PROTOCOLS

       HTTP/2

EXAMPLE

       TODO

AVAILABILITY

       Added in 7.46.0

RETURN VALUE

       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

       CURLOPT_STREAM_DEPENDS(3), CURLOPT_STREAM_DEPENDS_E(3), CURLOPT_PIPEWAIT(3), CURLMOPT_PIPELINING(3),

libcurl 7.54.0							 February 03, 2016					  CURLOPT_STREAM_WEIGHT(3)

CURLOPT_IOCTLFUNCTION(3)				     curl_easy_setopt options					  CURLOPT_IOCTLFUNCTION(3)

NAME

       CURLOPT_IOCTLFUNCTION - callback for I/O operations

SYNOPSIS

       #include <curl/curl.h>

       typedef enum {
	 CURLIOE_OK,		/* I/O operation successful */
	 CURLIOE_UNKNOWNCMD,	/* command was unknown to callback */
	 CURLIOE_FAILRESTART,	/* failed to restart the read */
	 CURLIOE_LAST		/* never use */
       } curlioerr;

       typedef enum  {
	 CURLIOCMD_NOP, 	/* no operation */
	 CURLIOCMD_RESTARTREAD, /* restart the read stream from start */
	 CURLIOCMD_LAST 	/* never use */
       } curliocmd;

       curlioerr ioctl_callback(CURL *handle, int cmd, void *clientp);

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_IOCTLFUNCTION, ioctl_callback);

DESCRIPTION

       Pass a pointer to your callback function, which should match the prototype shown above.

       This  callback function gets called by libcurl when something special I/O-related needs to be done that the library can't do by itself. For
       now, rewinding the read data stream is the only action it can request. The rewinding of the read data stream may be necessary when doing  a
       HTTP PUT or POST with a multi-pass authentication method.

       The callback MUST return CURLIOE_UNKNOWNCMD if the input cmd is not CURLIOCMD_RESTARTREAD.

       The clientp argument to the callback is set with the CURLOPT_IOCTLDATA(3) option.

       This  option  is deprecated! Do not use it. Use CURLOPT_SEEKFUNCTION(3) instead to provide seeking! If CURLOPT_SEEKFUNCTION(3) is set, this
       parameter will be ignored when seeking.

DEFAULT

       By default, this parameter is set to NULL. Not used.

PROTOCOLS

       Used with HTTP

EXAMPLE

       TODO

AVAILABILITY

       Added in 7.12.3

RETURN VALUE

       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

       CURLOPT_IOCTLDATA(3), CURLOPT_SEEKFUNCTION(3),

libcurl 7.54.0							 February 03, 2016					  CURLOPT_IOCTLFUNCTION(3)