mirror of
https://github.com/cesanta/mongoose.git
synced 2024-12-05 10:58:59 +08:00
5714056f9f
A number of people asked for a WebSocket client example, websocket_chat_client is one. PUBLISHED_FROM=c33e758c0a36a0aa919bdb6ef37ed1478d6b29e2
100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
/*
|
|
* Copyright (c) 2016 Cesanta Software Limited
|
|
* All rights reserved
|
|
*/
|
|
|
|
/*
|
|
* This is a WebSocket client example.
|
|
* Prints WS frames to stdout and forwards stdin to server.
|
|
*/
|
|
|
|
#include "mongoose.h"
|
|
|
|
static int s_done = 0;
|
|
static int s_is_connected = 0;
|
|
|
|
static void ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
|
|
struct websocket_message *wm = (struct websocket_message *) ev_data;
|
|
(void) nc;
|
|
|
|
switch (ev) {
|
|
case MG_EV_CONNECT: {
|
|
int status = *((int *) ev_data);
|
|
if (status != 0) {
|
|
printf("-- Connection error: %d\n", status);
|
|
}
|
|
break;
|
|
}
|
|
case MG_EV_WEBSOCKET_HANDSHAKE_DONE: {
|
|
printf("-- Connected\n");
|
|
s_is_connected = 1;
|
|
break;
|
|
}
|
|
case MG_EV_POLL: {
|
|
char msg[500];
|
|
int n = 0;
|
|
#ifdef _WIN32 /* Windows console input is special. */
|
|
INPUT_RECORD inp[100];
|
|
HANDLE h = GetStdHandle(STD_INPUT_HANDLE);
|
|
DWORD i, num;
|
|
if (!PeekConsoleInput(h, inp, sizeof(inp) / sizeof(*inp), &num)) break;
|
|
for (i = 0; i < num; i++) {
|
|
if (inp[i].EventType == KEY_EVENT &&
|
|
inp[i].Event.KeyEvent.wVirtualKeyCode == VK_RETURN) {
|
|
break;
|
|
}
|
|
}
|
|
if (i == num) break;
|
|
if (!ReadConsole(h, msg, sizeof(msg), &num, NULL)) break;
|
|
/* Un-unicode. This is totally not the right way to do it. */
|
|
for (i = 0; i < num * 2; i += 2) msg[i / 2] = msg[i];
|
|
n = (int) num;
|
|
#else /* For everybody else, we just read() stdin. */
|
|
fd_set read_set, write_set, err_set;
|
|
struct timeval timeout = {0, 0};
|
|
FD_ZERO(&read_set);
|
|
FD_ZERO(&write_set);
|
|
FD_ZERO(&err_set);
|
|
FD_SET(0 /* stdin */, &read_set);
|
|
if (select(1, &read_set, &write_set, &err_set, &timeout) == 1) {
|
|
n = read(0, msg, sizeof(msg));
|
|
}
|
|
#endif
|
|
if (n <= 0) break;
|
|
while (msg[n - 1] == '\r' || msg[n - 1] == '\n') n--;
|
|
mg_send_websocket_frame(nc, WEBSOCKET_OP_TEXT, msg, n);
|
|
break;
|
|
}
|
|
case MG_EV_WEBSOCKET_FRAME: {
|
|
printf("%.*s\n", (int) wm->size, wm->data);
|
|
break;
|
|
}
|
|
case MG_EV_CLOSE: {
|
|
if (s_is_connected) printf("-- Disconnected\n");
|
|
s_done = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
struct mg_mgr mgr;
|
|
struct mg_connection *nc;
|
|
const char *chat_server_url = argc > 1 ? argv[1] : "ws://127.0.0.1:8000";
|
|
|
|
mg_mgr_init(&mgr, NULL);
|
|
|
|
nc = mg_connect_ws(&mgr, ev_handler, chat_server_url, "ws_chat", NULL);
|
|
if (nc == NULL) {
|
|
fprintf(stderr, "Invalid address\n");
|
|
return 1;
|
|
}
|
|
|
|
while (!s_done) {
|
|
mg_mgr_poll(&mgr, 100);
|
|
}
|
|
mg_mgr_free(&mgr);
|
|
|
|
return 0;
|
|
}
|