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#include <stdio.h>
#include <stdlib.h>
#include <emscripten/websocket.h>
EM_BOOL WebSocketOpen(int eventType, const EmscriptenWebSocketOpenEvent *e, void *userData)
{
printf("open(eventType=%d, userData=%d)\n", eventType, (int)userData);
emscripten_websocket_send_utf8_text(e->socket, "hello on the other side");
char data[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
emscripten_websocket_send_binary(e->socket, data, sizeof(data));
emscripten_websocket_close(e->socket, 0, 0);
return 0;
}
EM_BOOL WebSocketClose(int eventType, const EmscriptenWebSocketCloseEvent *e, void *userData)
{
printf("close(eventType=%d, wasClean=%d, code=%d, reason=%s, userData=%d)\n", eventType, e->wasClean, e->code, e->reason, (int)userData);
return 0;
}
EM_BOOL WebSocketError(int eventType, const EmscriptenWebSocketErrorEvent *e, void *userData)
{
printf("error(eventType=%d, userData=%d)\n", eventType, (int)userData);
return 0;
}
EM_BOOL WebSocketMessage(int eventType, const EmscriptenWebSocketMessageEvent *e, void *userData)
{
printf("message(eventType=%d, userData=%d, data=%p, numBytes=%d, isText=%d)\n", eventType, (int)userData, e->data, e->numBytes, e->isText);
if (e->isText)
printf("text data: \"%s\"\n", e->data);
else
{
printf("binary data:");
for(int i = 0; i < e->numBytes; ++i)
printf(" %02X", e->data[i]);
printf("\n");
emscripten_websocket_delete(e->socket);
exit(0);
}
return 0;
}
int main()
{
if (!emscripten_websocket_is_supported())
{
printf("WebSockets are not supported, cannot continue!\n");
exit(1);
}
EmscriptenWebSocketCreateAttributes attr;
emscripten_websocket_init_create_attributes(&attr);
attr.url = "ws://localhost:8080";
EMSCRIPTEN_WEBSOCKET_T socket = emscripten_websocket_new(&attr);
if (socket <= 0)
{
printf("WebSocket creation failed, error code %d!\n", (EMSCRIPTEN_RESULT)socket);
exit(1);
}
emscripten_websocket_set_onopen_callback(socket, (void*)42, WebSocketOpen);
emscripten_websocket_set_onclose_callback(socket, (void*)43, WebSocketClose);
emscripten_websocket_set_onerror_callback(socket, (void*)44, WebSocketError);
emscripten_websocket_set_onmessage_callback(socket, (void*)45, WebSocketMessage);
}
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