目标: 搭建一个XMPP服务器, 实现在web page上用javascript与自己XMPP服务器通信, 匿名登录并与任何一个XMPP(Jabber)帐户通信. (Gtalk目前尚有问题)
XMPP服务器可能不是必须的(见下文, 我没有尝试)
环境与配置:
XMPP服务器:ejabberd文档
HTTP-Binding: 使用ejabberd搭建, 5280端口.
Javascript Client:Strophe文档
安装Ejabberd
yuminstallejabberd #apt-get install ejabberd
编辑配置文件: /etc/ejabberd/ejabberd.cfg, 这是个era lang格式配置文件, 行注释符号是%. 请参考ejabberd文档.
下面是默认配置文件里我修改过部分:
%%debug {loglevel, 5}. {hosts, ["sagan.me"]}. {host_config, "sagan.me", [{auth_method, [anonymous,internal]},{anonymous_protocol, sasl_anon}]}. {listen, [ {5222, ejabberd_c2s, [ {certfile, "/path/to/ssl/cert.pem"}, %%starttls, starttls_required, {access, c2s}, {shaper, c2s_shaper}, {max_stanza_size, 65536} ]}, {5269, ejabberd_s2s_in, [ {shaper, s2s_shaper}, {max_stanza_size, 131072} ]}, {{5280, "127.0.0.1"}, ejabberd_http, [ {request_handlers, [{["http-bind"], mod_http_bind}]}, captcha ]} ]}. {s2s_use_starttls, true}. {s2s_certfile, "/path/to/ssl/cert.pem"}. {s2s_default_policy, allow}. {auth_method, [internal, anonymous]}.
上面配置中, 声明监听127.0.0.1(本地IP地址) 5280端口为http-binding (BOSH)服务地址, 路径是"http-bind", 即服务实际URI是"http://127.0.0.1:5280/http-bind". 然后需要在web服务器配置中用mod_proxy或mod_rewrite将80或443端口上对 "/http-bind" 访问转发到"http://127.0.0.1:5280/http-bind", 因为由于浏览器同源限制, yourdomain.com:80上的web page是无法直接向yourdomain.tld:5280提交ajax请求的. ( 所以在上面配置中把ejabberd http-bind监听的端口设为了127.0.0.1:5280, 即不能从外部直接访问)
添加域名DNS SRV记录
这一步是必须的, 否则搭建的XMPP服务器基本上无法与大多数其它服务器或客户端通信. (插一句: Google Apps Talk基于XMPP平台, 如果不设置域名SRV记录的话, 就只能够用Gtalk登录(无法使用其它XMPP客户端), 而且只能和gmail.com或其它Google Apps域名的帐户通信)
_xmpp-client._tcp.sagan.me. 86400 IN SRV 10 0 5222 sagan.me.
_xmpp-server._tcp.sagan.me. 86400 IN SRV 10 0 5269 sagan.me.
5269和5222是XMPP在ICANN注册的标准端口.
修改WEB服务器配置
我的Lighttpd ModProxy配置:
proxy.server = ( "/http-bind" => ( ( "host" => "127.0.0.1", "port" => 5280 ) ) )
应该也可以用web服务器直接转发请求到外部某个公开的Jabber (XMPP)服务器 http-bind地址, 我没有尝试. (基本上找不到公开的提供http-bind的XMPP服务器)
使用Javascript客户端
上面ejabberd配置里开启了匿名登录(ANOYMOUS mechanism), 最终目的就是为了在web page中匿名访问服务并向任何一个XMPP帐户发送消息.
下载Strophe JS库并上传到你的域名目录下(这个库只有一个文件strophe.js), 下面这个测试例子修改自Strophe examples目录下echobot.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Strophe.js Echobot Example</title> <script type='text/javascript' src='http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js'></script> <script type='text/javascript' src='../strophe.js'></script> <script type='text/javascript' src='echobot.js'></script> </head> <body> <div id='login' style='text-align: center'> <form name='cred'> <label for='jid'>JID:</label> <input type='text' id='jid' value="sagan.me" /> <label for='pass'>Password:</label> <input type='password' id='pass' /> <input type='button' id='connect' value='connect' /> </form> </div> <hr /> <div id='log'></div> </body> </html>
看echobot.js
varBOSH_SERVICE ='/xmpp-httpbind'; varconnection =null; functionlog(msg) { $('#log').append('<div></div>').append(document.createTextNode(msg)); } functiononConnect(status) { if(status== Strophe.Status.CONNECTING){ log('Strophe is connecting.'); }elseif(status== Strophe.Status.CONNFAIL){ log('Strophe failed to connect.'); $('#connect').get(0).value='connect'; }elseif(status== Strophe.Status.DISCONNECTING){ log('Strophe is disconnecting.'); }elseif(status== Strophe.Status.DISCONNECTED){ log('Strophe is disconnected.'); $('#connect').get(0).value='connect'; }elseif(status== Strophe.Status.CONNECTED){ log('Strophe is connected.'); log('ECHOBOT: Send a message to '+ connection.jid+ ' to talk to me.'); connection.addHandler(onMessage,null,'message',null,null, null); connection.send($pres().tree()); varreply = $msg({to:"ono@oogami.name", from: connection.jid, type:'chat'}).c("body").t("Test Chat Message"); connection.send(reply.tree()); } } functiononMessage(msg){ varto = msg.getAttribute('to'); varfrom = msg.getAttribute('from'); vartype = msg.getAttribute('type'); varelems = msg.getElementsByTagName('body'); if(type =="chat"&&elems.length>0){ varbody = elems[0]; log('ECHOBOT: I got a message from '+ from +': '+ Strophe.getText(body)); varreply = $msg({to: from, from: to, type:'chat'}) .cnode(Strophe.copyElement(body)); connection.send(reply.tree()); log('ECHOBOT: I sent '+ from +': '+ Strophe.getText(body)); } // we must return true to keep the handler alive. // returning false would remove it after it finishes. returntrue; } $(document).ready(function(){ connection =newStrophe.Connection(BOSH_SERVICE); // Uncomment the following lines to spy on the wire traffic. //connection.rawInput = function (data) { log('RECV: ' + data); }; //connection.rawOutput = function (data) { log('SEND: ' + data); }; // Uncomment the following line to see all the debug output. //Strophe.log = function (level, msg) { log('LOG: ' + msg); }; $('#connect').bind('click',function(){ varbutton = $('#connect').get(0); if(button.value=='connect'){ button.value='disconnect'; connection.connect($('#jid').get(0).value, $('#pass').get(0).value, onConnect); }else{ button.value='connect'; connection.disconnect(); } }); });
将ono@oogami.name修改为一个测试Jabber帐号. 然后用浏览器打开echobot.html, 点击Connect按钮, Strophe就会匿名登录到刚刚建立的ejabber服务器( sagan.me ), 并向 "ono@oogami.name"这个帐号发送一条"Test Message"的信息.
另: 测试匿名登录向somebody@gtalk.com 发送消息失败, log里显示Gtalk服务器返回信息是503 error, Service-Unavailable, 但如果正常登录并添加Gtalk为好友的话则可以. Gtalk禁止了匿名用户向其发送消息? 我还在查资料中.
我准备用Javascript写一个简单的XMPP WEB匿名客户端, 实现允许访客直接与Gtalk和Facebook Chat通信等功能
http://www.ibm.com/developerworks/cn/xml/tutorials/x-realtimeXMPPtut/index.html