我正在尝试使用Socket.IO和 Perl 的Mojolicious。虽然我能够对WebSockets执行相同的操作,但我尝试对Socket.IO执行相同的操作(由于我需要更广泛的浏览器支持),但效果不佳。
我正在使用 Morbo 服务器。代码是:
#!/usr/bin/env perl
use Mojolicious::Lite;
get '/' => sub {
my $self = shift;
$self->render('index');
};
websocket '/echo' => sub {
my $self = shift;
state $counter = 1;
$self->res->headers->header('Access-Control-Allow-Origin' => "*");
Mojo::IOLoop->recurring(1.5 => sub {
my $loop = shift;
$self->send(sprintf("Websocket request: %d\n",$counter++));
});
};
app->start;
__DATA__
@@ index.html.ep
<!DOCTYPE html>
<html>
<head>
<title>Socket.IO test</title>
<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.4.1/jquery.min.js"></script>
<script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/socket.io/0.9.16/socket.io.min.js"></script>
</head>
<body>
<div id="dumper"></div>
<script>
var ws = new WebSocket('<%= url_for('echo')->to_abs %>');
ws.onmessage = function(e) {
var message = e.data;
console.log(message);
$("#dumper").text(message);
};
// var socket = io.connect('<%= url_for('echo')->to_abs %>');
// socket.on('data', function (data) {
// console.log(data);
// });
</script>
</body>
</html>
此代码部分运行良好(WebSocket),当我取消注释Socket.IO部分时,它失败并io.connect(...)
出现以下错误(标题和响应):
要求:
GET /socket.io/1/?t=1385234823089 HTTP/1.1
Host: 127.0.0.1:3000
Connection: keep-alive
Cache-Control: max-age=0
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.63 Safari/537.31
Accept: */*
Referer: http://127.0.0.1:3000/
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
回复:
HTTP/1.1 404 Not Found
Connection: keep-alive
Content-Type: text/html;charset=UTF-8
Date: Sat, 23 Nov 2013 19:27:03 GMT
Content-Length: 6163
Server: Mojolicious (Perl)
我在使用WebSocket时从客户端得到的请求是这样的:
GET ws://127.0.0.1:3000/echo HTTP/1.1
Pragma: no-cache
Origin: http://127.0.0.1:3000
Host: 127.0.0.1:3000
Sec-WebSocket-Key: zgob5gss5XTr9vzYwYNe+A==
Upgrade: websocket
Sec-WebSocket-Extensions: x-webkit-deflate-frame
Cache-Control: no-cache
Connection: Upgrade
Sec-WebSocket-Version: 13
看来Socket.IO确实要求升级套接字?此外,Mojo 不知道这条路线:
/socket.io/1
我也尝试更换:
io.connect('<%= url_for('echo')->to_abs %>');
和io.connect('http://localhost:300/echo');