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z.js
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/*
* vars
*/
var config = require('./vendor/config').config;
var express = require('express');
var googl = require('./vendor/googl');
var gzip = require('connect-gzip');
var site = require('./vendor/sitestreams');
var sys = require('sys');
var user = require('./vendor/clientstreams');
/*
* these vars are pulled in automatically from config.json
*/
var host = config.host;
googl.setKey(config.googl_key); //we arent reusing this at any point, just set it here
var imgur_key = config.imgur_key;
var oauth_callback = config.oauth_callback;
var key = config.oauth_key;
var secret = config.oauth_secret;
var port = config.port;
var sitestream_key = config.oauth_key_sitestream;
var sitestream_secret = config.oauth_secret_sitestream;
var startup_count = config.startup_count;
var redis_host = config.redis_host;
var redis_name = config.redis_name;
var redis_pass = config.redis_pass;
var redis_port = config.redis_port;
var socket_io_version = config.socket_io_version;
var storage_fingerprint = config.storage_fingerprint;
var storage_secret = config.storage_secret;
var storage_type = config.storage_type;
if (socket_io_version != "0.6")
{
var io = require('socket.io');
var sio = require('socket.io-sessions');
}
else
{
//bundled final versions of the 0.6 series of socket.io
var io = require('./vendor/socket.io');
var sio = require('./vendor/socket.io/sessions');
}
/*
* extended storage vars
*/
switch (storage_type)
{
case "memory":
var nstore = require("nstore");
var persistance = nstore.new(__dirname+"/store/sessions.db");
var storage = new express.session.MemoryStore();
break;
case "redis":
var RedisStore = require('connect-redis')(express);
var storage = new RedisStore(
{
host: redis_host,
db: redis_name,
pass: redis_pass,
port: redis_port
});
break;
//despite code being removed, you could easily add a few lines yourself to support couch, mongo, riak, etc etc :)
}
/*
* server
*/
var server = express.createServer();
server.configure(function()
{
server.set("views", __dirname + "/views");
server.use(express.cookieParser());
server.use(express.session({secret: storage_secret, fingerprint: storage_fingerprint, store: storage}));
server.use(express.bodyParser());
server.use(express.methodOverride());
server.use(server.router);
server.use(express["static"](__dirname+"/public"));
server.use(express.logger({format: ":method :url"}));
});
server.configure("development", function()
{
express.logger("development node");
server.use(express.errorHandler({dumpExceptions: true, showStack: true}));
});
server.configure("production", function()
{
express.logger("production node");
server.use(express.errorHandler());
});
server.dynamicHelpers(
{
session: function(req, res)
{
return req.session;
}
});
/* index, does some detection on sessions */
server.get("/",function(req, res)
{
gzip.gzip();
if (req.cookies.key && storage_type == "memory")
{
persistance.get(req.cookies.key, function (error, this_session)
{
if (!error)
{
if (typeof(this_session.accessKey) == "string")
{
req.session.oauth = this_session;
res.redirect("/howdy");
}
}
});
}
else if (req.session.oauth)
{
if (typeof(req.session.oauth.accessKey) == "string")
{
res.redirect("/howdy"); //valid session
}
else
{
res.redirect("/oauth/logout"); //invalid session, restart
}
}
else
{
res.render("index.jade",
{
title: "hello, welcome to z!"
});
}
});
/* authed clients get redirected here */
server.get("/howdy", function(req, res)
{
gzip.gzip();
if (!req.session.oauth)
{
res.redirect("/");
}
else
{
res.render("home.jade",
{
imgur_script: "var imgur_key = '"+imgur_key+"';",
title: "hello @"+req.session.oauth._results.screen_name+"!"
});
}
});
/* initial logging in */
server.get("/oauth/login", function(req, res)
{
if (!req.session.oauth)
{
var tw = new user(key, secret);
tw.getRequestToken(function(error, url)
{
if(error)
{
req.session.destroy(function()
{
res.send("there was an issue building the url...<br /><br /><a href='/'>return</a>");
});
}
else
{
req.session.oauth = tw;
res.redirect(url);
}
});
}
else
{
res.redirect("/howdy");
}
});
/* destroy all session information (including the id) */
server.get("/oauth/logout", function(req, res)
{
if (req.session.oauth)
{
if (storage_type == "memory")
{
persistance.remove(req.cookies.key, function(error)
{
return; //do nothing, return
});
}
req.session.destroy();
}
if (storage_type == "memory")
{
//res.cookie.unset("key"); //this should work but doesnt, whatever
res.cookie("key", "see-ya", {expires: new Date(Date.now()-86400), httpOnly: true}); //see above, dumb hack
}
res.redirect("/");
});
/* oauth callback */
server.get("/"+oauth_callback, function(req, res)
{
gzip.gzip();
if (!req.session.oauth)
{
res.redirect("/");
}
else
{
var tw = new user(key, secret, req.session.oauth);
tw.getAccessToken(req.query.oauth_verifier, function(error)
{
if(error)
{
req.session.destroy(function()
{
res.send("there was an issue getting the access token...<br /><br /><a href='/'>return</a>");
});
}
else
{
if (storage_type == "memory")
{
persistance.save(tw.accessKey, tw, function(error)
{
if (error)
{
console.log("oauth callback save error: "+error);
}
});
}
req.session.oauth = tw;
if (storage_type == "memory")
{
res.cookie("key", tw.accessKey);
}
res.redirect("/howdy");
}
});
}
});
/* determine the best way to listen, if thats even possible */
if (!module.parent)
{
try
{
if (host == "" && port == 0)
{
server.listen();
}
else if (host == "" && port != 0)
{
server.listen(port);
}
else if (host != "" && port != 0)
{
server.listen(port, host);
}
console.log("z engine running at "+server.address().port);
}
catch (error)
{
console.error("bind server listener error: "+error);
}
}
/* gzipping */
gzip.gzip({matchType: /audio/});
gzip.gzip({matchType: /css/});
gzip.gzip({matchType: /img/});
gzip.gzip({matchType: /js/});
gzip.gzip({matchType: /lang/});
gzip.gzip({matchType: /socket.io/});
/*
* socket.io
*/
/* some settings that will most certainly be used later on if we can sitestream access */
var connected_clients = new Array();
/* the raw socket.io listener */
if (socket_io_version != "0.6")
{
var raw_socket = io.listen(server);
}
else
{
var raw_socket = io.listen(server,
{
transports: [
"xhr-polling" //only support xhr-polling, this is all that seems to work on dotcloud (for example)
]
});
}
if (socket_io_version != "0.6")
{
raw_socket.enable("browser client minification");
raw_socket.configure("production", function()
{
raw_socket.enable("browser client etag");
raw_socket.set("log level", 1);
});
raw_socket.configure("development", function()
{
raw_socket.set("log level", 3);
});
}
/* the socket.io session listener - there are not two listeners, rather this extends the above instance */
var socket = sio.enable(
{
parser: express.cookieParser(),
socket: raw_socket, // <--note the raw io.listen is over yonder
store: storage
});
/* delete a tweet */
socket.drop_tweet = function (tw, client, json)
{
try
{
switch (json.action)
{
case "dm":
tw.destroy_dm(json.id_str, function(error)
{
if (error)
{
console.error(error);
}
});
break;
case "tweet":
tw.destroy(json.id_str, function(error)
{
if (error)
{
console.error(error);
}
});
break;
}
}
catch (error)
{
console.error("socket.drop_tweet error: "+error);
}
return this;
};
/* drop the client from everything */
socket.drop = function (session)
{
try
{
for (var index in connected_clients)
{
if (typeof(connected_clients[index].client) == "object" && typeof(connected_clients[index].session) == "object")
{
var user_id = connected_clients[index].session.oauth._results.user_id;
if (user_id == session.oauth._results.user_id)
{
if (!sitestream_key && typeof(connected_clients[index].userstream) == "object")
{
connected_clients[index].userstream.destroy();
}
connected_clients.splice(index, 1);
break;
}
}
}
}
catch (error)
{
console.error("socket.drop error: "+error);
}
return this;
};
/* favorite a tweet */
socket.favorite = function (tw, client, json)
{
try
{
switch (json.action)
{
case "do":
tw.favorite(json.id_str, function(error)
{
if (error)
{
console.error(error);
}
});
break;
case "undo":
tw.unfavorite(json.id_str, function(error)
{
if (error)
{
console.error(error);
}
});
break;
}
}
catch (error)
{
console.error("socket.favorite error: "+error);
}
return this;
};
/* fetch a resource */
socket.fetch = function (tw, client, session, json)
{
try
{
switch (json)
{
case "dms-inbox":
tw.getInbox({count: startup_count, include_entities: true}, function(error, data, response)
{
if (!error)
{
socket.radiosort(client, "dms", data);
}
});
break;
case "dms-outbox":
tw.getOutbox({count: startup_count, include_entities: true}, function(error, data, response)
{
if (!error)
{
socket.radiosort(client, "dms", data);
}
});
break;
case "home":
tw.getTimeline({type: "home_timeline", count: startup_count, include_entities: true}, function(error, data, response)
{
if (!error)
{
socket.radiosort(client, "home", data);
}
});
break;
case "mentions":
tw.getTimeline({type: "mentions", count: startup_count, include_entities: true}, function(error, data, response)
{
if (!error)
{
socket.radiosort(client, "mentions", data);
}
});
break;
case "rates":
tw.rateLimit(function(error, data, response)
{
if (!error)
{
socket.radio(client, "rates", data);
}
});
break;
case "userstream":
if (!sitestream_key)
{
socket.userstream(tw, client, session);
}
else
{
//do something here?
}
break;
}
}
catch (error)
{
console.error("socket.fetch error: "+error);
}
return this;
};
/* safely broadcast to all clients */
socket.megaphone = function (type, message)
{
try
{
for (var index in connected_clients)
{
var client = connected_clients[index].client;
if (client)
{
socket.radio(client, type, message)
}
}
}
catch (error)
{
console.error("socket.megaphone error: "+error);
}
return this;
};
/* error handling */
socket.on("error", function(error)
{
if (error.errno === process.ECONNRESET)
{/* prevent an error from being spit out, this is expected behavior! */}
});
/* the socket connection event which gets the gears started */
socket.on("sconnection", function(client, session)
{
if (typeof(session.oauth) == "object")
{
try
{
var tw = new user(key, secret, session.oauth);
}
catch (error)
{
console.error("user oauth session issue: "+error);
}
if (tw) //ignore any other connections
{
try
{
connected_clients[session.oauth._results.user_id] = {client: client, session: session};
}
catch (error)
{
console.error("connected_client error: "+error);
}
socket.radio(client, "loaded",
{
loaded: true
});
socket.radio(client, "info",
{
screen_name: session.oauth._results.screen_name,
user_id: session.oauth._results.user_id
});
client.on("disconnect", function()
{
try
{
socket.drop(session);
}
catch (error)
{
console.error("client disconnect error: "+error);
}
});
if (socket_io_version != "0.6")
{
client.on("delete", function(json)
{
socket.drop_tweet(tw, client, json);
});
client.on("favorite", function(json)
{
socket.favorite(tw, client, json);
});
client.on("fetch", function(json)
{
socket.fetch(tw, client, session, json);
});
client.on("retweet", function(json)
{
socket.retweet(tw, client, json);
});
client.on("shorten", function(json)
{
socket.shorten(client, json);
});
client.on("show", function(json)
{
socket.show(tw, client, json);
});
client.on("status", function(json)
{
socket.status(tw, client, json);
});
}
else
{
client.on("message", function(json)
{
switch (json.msg)
{
case "delete":
socket.drop_tweet(tw, client, json.payload);
break;
case "favorite":
socket.favorite(tw, client, json.payload);
break;
case "fetch":
socket.fetch(tw, client, session, json.payload);
break;
case "retweet":
socket.retweet(tw, client, json.payload);
break;
case "shorten":
socket.shorten(client, json.payload);
break;
case "show":
socket.show(tw, client, json.payload);
break;
case "status":
socket.status(tw, client, json.payload);
break;
}
});
}
}
}
});
/* log to console that an invalid session was found but do nothing further than this */
socket.on("sinvalid", function(client)
{
//invalid session, just ignore
});
/* broadcast to a single client */
socket.radio = function (client, msg, payload)
{
try
{
if (socket_io_version != "0.6")
{
client.json.emit(msg, payload);
}
else
{
client.send({msg: msg, payload: payload});
}
}
catch (error)
{
console.error("socket.radio error: "+error);
}
return this;
};
/* sorts the timeline really nicely when a client first connects */
socket.radiosort = function (client, type, data)
{
try
{
for (var index in data)
{
setTimeout(function()
{
if (client)
{
socket.radio(client, type, data.shift()); //we use shift here because we will only send this once
}
}, index * 250); //zip through everything and use the index itself to increase the timeout. nice trick eh?
}
}
catch (error) //since there is the chance a client may disconnect before the above finishes, we prevent a crash here
{
console.error("socket.radiosort error: "+error);
}
return this;
};
socket.retweet = function (tw, client, json)
{
try
{
tw.retweet(json.id_str, function(error, data, response)
{
if (!error)
{
socket.radio(client, "retweet_info", data);
}
});
}
catch (error)
{
console.error("socket.retweet error: "+error);
}
return this;
};
/* shorten links */
socket.shorten = function (client, json)
{
try
{
googl.shorten(json.shorten, function (data)
{
socket.radio(client, "shorten", {shortened: data.id, original: json.shorten});
});
}
catch (error)
{
console.error("socket.shorten error: "+error);
}
return this;
};
/* single sitestream connection */
socket.sitestream = function ()
{
try
{
if (key && secret && sitestream_key && sitestream_secret)
{
var connected_clients_sitestream = new Array();
if (connected_clients.length > 0)
{
var sitestream_index = 0;
for (var index in connected_clients)
{
if (index++ % 100 == 0)
{
sitestream_index++;
}
if (typeof(connected_clients[index].client) == "object" && typeof(connected_clients[index].session) == "object")
{
var found = false;
var user_id = connected_clients[index].session.oauth._results.user_id;
var userstream = false;
if (typeof(connected_clients[index].userstream) == "object")
{
userstream = connected_clients[index].userstream;
}
for (var index2 in connected_clients_sitestream[sitestream_index]) //make sure this user_id doesnt exist already
{
if (connected_clients_sitestream[sitestream_index][index2] == user_id)
{
found = true; //if so, we wont add it twice
}
}
if (!found)
{
if (userstream)
{
connected_clients[index].userstream.destroy(); //destroy the userstream
}
connected_clients_sitestream[sitestream_index].push(user_id); //push this non-duplicate user in
}
}
}
}
try
{
var tw = new site(key, secret, sitestream_key, sitestream_secret);
}
catch (error2)
{
console.error("socket.sitestream oauth issue: "+error2);
}
for (var index in connected_clients_sitestream[sitestream_index])
{
tw.stream("site", {follow: connected_clients_sitestream[index], with: followings, include_entities: true}, function(stream)
{
stream.on("data", function (data)
{
try
{
if (data.for_user && data.message)
{
var user_id = data.for_user;
var payload = data.message;
var client = connected_clients[user_id].client;
if (payload.text && payload.created_at && payload.user)
{
socket.radio(client, "tweet", payload);
}
else if (payload["delete"])
{
socket.radio(client, "delete", payload["delete"]);
}
else if (payload.direct_message)
{
socket.radio(client, "direct_message", payload.direct_message);
}
else if (payload.event)
{
socket.radio(client, "event", payload);
}
else if (payload.friends)
{
socket.radio(client, "friends", payload.friends);
}
}
}
catch(error)
{
console.error("socket.sitestream message error: "+error);
}
});
stream.on("error", function(data)
{
//
});
stream.on("end", function()
{
//
});
});
}
}
else
{
console.error("socket.sitestream error: no sitestream key & secret");
}
}
catch (error)
{
console.error("socket.sitestream error: "+error);
}
return this;
};
/* show a specific status */
socket.show = function (tw, client, json)
{
try
{
tw.show(json.id_str, {include_entities: true}, function(error, data, response)
{
if (!error)
{
socket.radio(client, "show", data);
}
});
}
catch (error)
{
console.error("socket.show error: "+error);
}
return this;
};
/* send new status */
socket.status = function (tw, client, json)
{
try
{
switch (json.action)
{
case "dm":
tw.direct_message(json.data, function(error)
{
if (error)
{
console.error(error);
}
});
break;
case "tweet":
tw.update(json.data, function(error)
{
if (error)
{
console.error(error);
}
});
break;
}
}
catch (error)
{
console.error("socket.status error: "+error);
}
return this;
};
/* basic userstream connection, */
socket.userstream = function (tw, client, session)
{
try
{
if (typeof(connected_clients[session.oauth._results.user_id].userstream) == "undefined")
{
tw.stream("user", {include_entities: true}, function(stream)
{
connected_clients[session.oauth._results.user_id].userstream = stream;
stream.on("data", function (data)
{
try
{
if (data.text && data.created_at && data.user)
{
socket.radio(client, "tweet", data);
}
else if (data["delete"])
{
socket.radio(client, "delete", data["delete"]);
}
else if (data.direct_message)
{
socket.radio(client, "direct_message", data.direct_message);
}
else if (data.event)
{
socket.radio(client, "event", data);
}
else if (data.friends)
{
socket.radio(client, "friends", data.friends);
}
}
catch (error2)
{
console.error("socket.userstream message error: "+error2);
}
});
stream.on("error", function(data)
{
socket.radio(client, "server_error", {event: "error"});
});
stream.on("end", function()
{
socket.radio(client, "server_error", {event: "end"});
});
});
}
else
{
socket.drop(session); //close the previous stream
socket.userstream(tw, client, session); //loop through here again
}
return this;
}
catch (error)
{
console.error("socket.userstream error: "+error);
}
};