]> git.scottworley.com Git - reliable-chat/blobdiff - webclient/rc.html
Fetch with direct cross-origin XMLHttpRequests
[reliable-chat] / webclient / rc.html
index bc38d0bb79422590121c07f7efe2647b8015ec14..8aeae37ce3d43d4de54b0cfcb65bca39488afc50 100644 (file)
 <html xmlns="http://www.w3.org/1999/xhtml">
 <head>
  <title>Reliable Chat</title>
- <link rel="stylesheet" title="Default style" href="rc.css" type="text/css"/>
- <script type="text/javascript" src="rc.js"></script>
+  <style type="text/css"><!--/*--><![CDATA[/*><!--*/
+       html, body, #outer-table, #history { width: 99.9%; height: 100%; margin: 0; padding: 0 }
+       #status { background-color: #eef }
+       #say { width: 100% }
+       #history { vertical-align: bottom }
+       img { width: 1px; height: 1px; }
+       iframe { display: none }
+       #status span { margin-right: 2em }
+       #status span.sad { background-color: #fee }
+       #status span.happy { background-color: #efe }
+  /*]]>*/--></style>
+  <script type="text/javascript"><!--//--><![CDATA[//><!--
+       var servers = ['chkno.net', 'rc2.chkno.net', 'echto.net', 'the-wes.com', 'vibrantlogic.com'];
+
+       var session = Math.random();
+       var since = {};
+       var seen = {};
+
+       function rcnick() {
+               var nick = localStorage.getItem("nick");
+               if (nick) {
+                       return nick;
+               }
+               return 'anonymous';
+       }
+
+       function rcsetnick(new_nick) {
+               localStorage.setItem("nick", new_nick);
+       }
+
+       function rcserverbase(server) {
+               // Add the default port if server doesn't contain a port number already
+               if (server.indexOf(":") == -1) {
+                       return "http://" + server + ":21059";
+               } else {
+                       return "http://" + server;
+               }
+       }
+
+       function rcchangeserverstatus(server, new_status) {
+               var statusbar = document.getElementById("status");
+               var spans = statusbar.getElementsByTagName("span");
+               for (var i in spans) {
+                       if (spans[i].firstChild && 'data' in spans[i].firstChild && spans[i].firstChild.data == server) {
+                               spans[i].setAttribute("class", new_status);
+                       }
+               }
+       }
+
+       function rcaddmessagetohistory(message) {
+               var d = document.createElement("div");
+               d.appendChild(document.createTextNode(message));
+               var h = document.getElementById("history");
+               h.appendChild(d);
+               window.scrollTo(0, document.body.scrollHeight);
+               return d;
+       }
+
+       function make_seen_key(id, text) {
+               return id.replace(/@/g, "@@") + "_@_" + text.replace(/@/g, "@@");
+       }
+
+       function rcreceivemessages(server, messages) {
+               for (var i in messages) {
+                       var seen_key = make_seen_key(messages[i]['ID'], messages[i]['Text']);
+                       if (!(seen_key in seen)) {
+                               seen[seen_key] = true;
+                               rcaddmessagetohistory(messages[i]['Text']);
+                               for (var i in servers) {
+                                       rcchangeserverstatus(servers[i], "sad");
+                               }
+                       }
+                       rcchangeserverstatus(server, "happy");
+               }
+       }
+
+       function rcfetch(server) {
+               var delay = 10000;  // TODO: Exponential backoff
+               var xhr = new XMLHttpRequest();
+               xhr.onreadystatechange = function() {
+                       if (this.readyState == this.DONE) {
+                               if (this.status == 200) {
+                                       var rtxt = this.responseText;
+                                       if (rtxt != null) {
+                                               var messages = JSON.parse(rtxt);
+                                               if (messages != null) {
+                                                       rcreceivemessages(server, messages);
+                                                       window.parent.postMessage(rtxt, "*");
+                                                       delay = 40;
+                                                       if (messages.length >= 1 && "Time" in messages[messages.length-1]) {
+                                                               since[server] = messages[messages.length-1]["Time"];
+                                                       }
+                                               }
+                                       }
+                               }
+                               window.setTimeout(rcfetch, delay, server);
+                       }
+               }
+               var uri = rcserverbase(server) + "/fetch";
+               if (server in since) {
+                       uri += '?since="' + since[server] + '"';
+               }
+               xhr.open("GET", uri);
+               xhr.send();
+       }
+
+       function rcconnect() {
+               for (var i in servers) {
+                       rcfetch(servers[i]);
+                       // Status bar entry
+                       var status_indicator = document.createElement("span");
+                       status_indicator.appendChild(document.createTextNode(servers[i]));
+                       status_indicator.setAttribute("class", "sad");
+                       document.getElementById("status").appendChild(status_indicator);
+               }
+               if (rcnick() == 'anonymous') {
+                       rcaddmessagetohistory("-!- Set your nick with /nick");
+               }
+       }
+
+       function rcsend(d, message) {
+               var id = new Date().getTime() + "-" + session + "-" + Math.random();
+               seen[make_seen_key(id, message)] = true;
+               var path = "/speak" +
+                       "?id=" + encodeURIComponent(id) +
+                       "&text=" + encodeURIComponent(message);
+               for (var i in servers) {
+                       var uri = rcserverbase(servers[i]) + path;
+                       var img = document.createElement("img");
+                       img.setAttribute("src", uri);
+                       d.appendChild(img);
+               }
+       }
+
+       function rckeydown(event) {
+               if (event.keyCode == 13) {
+                       var input = document.input.say.value;
+                       document.input.say.value = "";
+                       
+                       // Check nick change
+                       var message;
+                       var re = /^\/nick (.*)/;
+                       var match = re.exec(input);
+                       if (match) {
+                               message = "*** " + rcnick() + " is now known as " + match[1];
+                               rcsetnick(match[1]);
+                       } else {
+                               message = "<" + rcnick() + "> " + input;
+                       }
+
+                       // Say the message
+                       var d = rcaddmessagetohistory(message);
+                       rcsend(d, message);
+
+                       // Remind people to set their nick
+                       if (rcnick() == 'anonymous') {
+                               rcaddmessagetohistory("-!- Set your nick with /nick");
+                       }
+               }
+       }
+  //--><!]]></script>
+
 </head>
 
-<body>
+<body onload="rcconnect()">
        <table id="outer-table">
                <tr><td id="history"></td></tr>
                <tr><td id="status">&nbsp;</td></tr>