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41 lines
1.5 KiB
C
41 lines
1.5 KiB
C
// Copyright (c) 2020 Cesanta Software Limited
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// All rights reserved
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//
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// Example Websocket client. Usage:
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// 1. Start websocket server: cd ../websocket-server && make
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// 2. In another terminal, start this client: make
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#include "mongoose.h"
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static const char *s_url = "ws://localhost:8000/websocket";
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// Print websocket response and signal that we're done
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static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
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if (ev == MG_EV_ERROR) {
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// On error, log error message
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LOG(LL_ERROR, ("%p %s", c->fd, (char *) ev_data));
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} else if (ev == MG_EV_WS_OPEN) {
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// When websocket handshake is successful, send message
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mg_ws_send(c, "hello", 5, WEBSOCKET_OP_TEXT);
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} else if (ev == MG_EV_WS_MSG) {
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// When we get echo response, print it
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struct mg_ws_message *wm = (struct mg_ws_message *) ev_data;
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printf("GOT ECHO REPLY: [%.*s]\n", (int) wm->data.len, wm->data.ptr);
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}
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if (ev == MG_EV_ERROR || ev == MG_EV_CLOSE || ev == MG_EV_WS_MSG) {
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*(bool *) fn_data = true; // Signal that we're done
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}
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}
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int main(void) {
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struct mg_mgr mgr; // Event manager
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bool done = false; // Event handler flips it to true
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struct mg_connection *c; // Client connection
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mg_mgr_init(&mgr); // Initialise event manager
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c = mg_ws_connect(&mgr, s_url, fn, &done, NULL); // Create client
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while (c && done == false) mg_mgr_poll(&mgr, 1000); // Wait for echo
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mg_mgr_free(&mgr); // Deallocate resources
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return 0;
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}
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