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Replace trivial websocket example by a more illustrated one

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bel
2013-10-31 21:55:01 +01:00
parent c09392f7bd
commit ee01cf1ca7
2 changed files with 0 additions and 91 deletions
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44
examples/websocket/docroot/index.html
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@ -1,44 +0,0 @@
<!DOCTYPE html>
<meta charset="utf-8" />
<title>WebSocket Test</title>
<script language="javascript" type="text/javascript">
var writeToScreen = function(message) {
var div = document.createElement('div');
div.innerHTML = message;
document.getElementById('output').appendChild(div);
};
window.onload = function() {
var url = 'ws://' + window.location.host + '/foo';
websocket = new WebSocket(url);
websocket.onopen = function(ev) {
writeToScreen('CONNECTED');
var message = 'Не всё подчиняется разуму. Но всё подчиняется упорству. ';
writeToScreen('SENT: ' + message);
websocket.send(message);
};
websocket.onclose = function(ev) {
writeToScreen('DISCONNECTED');
};
websocket.onmessage = function(ev) {
writeToScreen('<span style="color: blue;">RESPONSE: ' + ev.data +
' </span>');
websocket.send('exit');
};
websocket.onerror = function(ev) {
writeToScreen('<span style="color: red; ">ERROR: </span> ' + ev.data);
};
};
</script>
<style> div {font: small Verdana; } </style>
<h2>Civetweb WebSocket Test</h2>
<div style="width: 400px; color: #aaa; padding: 1em; ">
This page code creates websocket to the URI "/foo",
sends a message to it, waits for the reply, then sends an "exit" message.
Server must echo all messages back, and terminate the conversation after
receiving the "exit" message.
</div>
<div id="output"></div>
</html>

47
examples/websocket/websocket.c
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// Copyright (c) 2004-2012 Sergey Lyubka
// This file is a part of civetweb project, http://github.com/sunsetbrew/civetweb
#include <stdio.h>
#include <string.h>
#include "civetweb.h"
static void websocket_ready_handler(struct mg_connection *conn)
{
static const char *message = "server ready";
mg_websocket_write(conn, WEBSOCKET_OPCODE_TEXT, message, strlen(message));
}
// Arguments:
// flags: first byte of websocket frame, see websocket RFC,
// http://tools.ietf.org/html/rfc6455, section 5.2
// data, data_len: payload data. Mask, if any, is already applied.
static int websocket_data_handler(struct mg_connection *conn, int flags,
char *data, size_t data_len)
{
(void) flags; // Unused
mg_websocket_write(conn, WEBSOCKET_OPCODE_TEXT, data, data_len);
// Returning zero means stoping websocket conversation.
// Close the conversation if client has sent us "exit" string.
return memcmp(data, "exit", 4);
}
int main(void)
{
struct mg_context *ctx;
struct mg_callbacks callbacks;
const char *options[] = {
"listening_ports", "8080",
"document_root", "docroot",
NULL
};
memset(&callbacks, 0, sizeof(callbacks));
callbacks.websocket_ready = websocket_ready_handler;
callbacks.websocket_data = websocket_data_handler;
ctx = mg_start(&callbacks, NULL, options);
getchar(); // Wait until user hits "enter"
mg_stop(ctx);
return 0;
}