mirror of
https://codeberg.org/kiss-community/repo
synced 2024-11-19 21:20:07 -07:00
91 lines
2.9 KiB
Groff
91 lines
2.9 KiB
Groff
.\" generated by cd2nroff 0.1 from curl_ws_send.md
|
|
.TH curl_ws_send 3 libcurl
|
|
.SH NAME
|
|
curl_ws_send \- send WebSocket data
|
|
.SH SYNOPSIS
|
|
.nf
|
|
#include <curl/curl.h>
|
|
|
|
CURLcode curl_ws_send(CURL *curl, const void *buffer, size_t buflen,
|
|
size_t *sent, curl_off_t fragsize,
|
|
unsigned int flags);
|
|
.fi
|
|
.SH DESCRIPTION
|
|
This function call is EXPERIMENTAL.
|
|
|
|
Send the specific message fragment over an established WebSocket
|
|
connection. The \fIbuffer\fP holds the data to send and it is \fIbuflen\fP
|
|
number of payload bytes in that memory area.
|
|
|
|
\fIsent\fP is returned as the number of payload bytes actually sent.
|
|
|
|
To send a (huge) fragment using multiple calls with partial content per
|
|
invoke, set the \fICURLWS_OFFSET\fP bit and the \fIfragsize\fP argument as the
|
|
total expected size for the first part, then set the \fICURLWS_OFFSET\fP with
|
|
a zero \fIfragsize\fP for the following parts.
|
|
|
|
If not sending a partial fragment or if this is raw mode, \fIfragsize\fP
|
|
should be set to zero.
|
|
|
|
If \fBCURLWS_RAW_MODE\fP is enabled in \fICURLOPT_WS_OPTIONS(3)\fP, the
|
|
\fBflags\fP argument should be set to 0.
|
|
|
|
To send a message consisting of multiple frames, set the \fICURLWS_CONT\fP bit
|
|
in all frames except the final one.
|
|
.SH FLAGS
|
|
.IP CURLWS_TEXT
|
|
The buffer contains text data. Note that this makes a difference to WebSocket
|
|
but libcurl itself does not make any verification of the content or
|
|
precautions that you actually send valid UTF\-8 content.
|
|
.IP CURLWS_BINARY
|
|
This is binary data.
|
|
.IP CURLWS_CONT
|
|
This is not the final fragment of the message, which implies that there is
|
|
another fragment coming as part of the same message where this bit is not set.
|
|
.IP CURLWS_CLOSE
|
|
Close this transfer.
|
|
.IP CURLWS_PING
|
|
This is a ping.
|
|
.IP CURLWS_PONG
|
|
This is a pong.
|
|
.IP CURLWS_OFFSET
|
|
The provided data is only a partial fragment and there is more coming in a
|
|
following call to \fIcurl_ws_send()\fP. When sending only a piece of the
|
|
fragment like this, the \fIfragsize\fP must be provided with the total
|
|
expected fragment size in the first call and it needs to be zero in subsequent
|
|
calls.
|
|
.SH PROTOCOLS
|
|
WS
|
|
.SH EXAMPLE
|
|
.nf
|
|
#include <string.h> /* for strlen */
|
|
|
|
const char *send_payload = "magic";
|
|
|
|
int main(void)
|
|
{
|
|
size_t sent;
|
|
CURLcode res;
|
|
CURL *curl = curl_easy_init();
|
|
curl_easy_setopt(curl, CURLOPT_URL, "wss://example.com/");
|
|
curl_easy_setopt(curl, CURLOPT_CONNECT_ONLY, 2L);
|
|
curl_easy_perform(curl);
|
|
res = curl_ws_send(curl, send_payload, strlen(send_payload), &sent, 0,
|
|
CURLWS_PING);
|
|
curl_easy_cleanup(curl);
|
|
return (int)res;
|
|
}
|
|
.fi
|
|
.SH AVAILABILITY
|
|
Added in 7.86.0.
|
|
.SH RETURN VALUE
|
|
\fICURLE_OK\fP (zero) means that the data was sent properly, non\-zero means an
|
|
error occurred as \fI<curl/curl.h>\fP defines. See the \fIlibcurl\-errors(3)\fP man
|
|
page for the full list with descriptions.
|
|
.SH SEE ALSO
|
|
.BR curl_easy_getinfo (3),
|
|
.BR curl_easy_perform (3),
|
|
.BR curl_easy_setopt (3),
|
|
.BR curl_ws_recv (3),
|
|
.BR libcurl-ws (3)
|