87 lines
2.6 KiB
C
87 lines
2.6 KiB
C
/*
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* Copyright (c) 2014 Cesanta Software Limited
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* All rights reserved
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*/
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#include "mongoose.h"
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static sig_atomic_t s_signal_received = 0;
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static const char *s_http_port = "9003";
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static struct mg_serve_http_opts s_http_server_opts;
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static void signal_handler(int sig_num) {
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signal(sig_num, signal_handler); // Reinstantiate signal handler
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s_signal_received = sig_num;
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}
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static int is_websocket(const struct mg_connection *nc) {
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return nc->flags & MG_F_IS_WEBSOCKET;
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}
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static void broadcast(struct mg_connection *nc, const struct mg_str msg) {
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struct mg_connection *c;
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char buf[25000];
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char addr[10240];
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mg_sock_addr_to_str(&nc->sa, addr, sizeof(addr),
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MG_SOCK_STRINGIFY_IP | MG_SOCK_STRINGIFY_PORT);
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snprintf(buf, sizeof(buf), "%s %.*s", addr, (int) msg.len, msg.p);
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printf("%s\n", buf); /* Local echo. */
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for (c = mg_next(nc->mgr, NULL); c != NULL; c = mg_next(nc->mgr, c)) {
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if (c == nc) continue; /* Don't send to the sender. */
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mg_send_websocket_frame(c, WEBSOCKET_OP_TEXT, buf, strlen(buf)); // A single websocket frame is sent
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}
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}
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static void ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
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switch (ev) {
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case MG_EV_WEBSOCKET_HANDSHAKE_DONE: {
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/* New websocket connection. Tell everybody. */
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broadcast(nc, mg_mk_str("++ joined"));
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break;
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}
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case MG_EV_WEBSOCKET_FRAME: {
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struct websocket_message *wm = (struct websocket_message *) ev_data;
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/* New websocket message. Tell everybody. */
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struct mg_str d = {(char *) wm->data, wm->size}; //This is the data received data inside *ev_data
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broadcast(nc, d); //Action when data is received
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break;
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}
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case MG_EV_HTTP_REQUEST: {
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mg_serve_http(nc, (struct http_message *) ev_data, s_http_server_opts);
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break;
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}
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case MG_EV_CLOSE: {
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/* Disconnect. Tell everybody. */
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if (is_websocket(nc)) {
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broadcast(nc, mg_mk_str("-- left"));
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}
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break;
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}
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}
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}
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int main(void) {
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struct mg_mgr mgr;
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struct mg_connection *nc;
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signal(SIGTERM, signal_handler);
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signal(SIGINT, signal_handler);
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setvbuf(stdout, NULL, _IOLBF, 0);
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setvbuf(stderr, NULL, _IOLBF, 0);
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mg_mgr_init(&mgr, NULL);
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nc = mg_bind(&mgr, s_http_port, ev_handler); //connection mg_connection and manager mg_mgr are linked along with port and event handler
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mg_set_protocol_http_websocket(nc);
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s_http_server_opts.document_root = "."; // Serve current directory
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s_http_server_opts.enable_directory_listing = "yes";
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printf("Started on port %s\n", s_http_port);
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while (s_signal_received == 0) {
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mg_mgr_poll(&mgr, 200);
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}
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mg_mgr_free(&mgr);
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return 0;
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} |