sync/lib/web/webserver.js

331 lines
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var path = require("path");
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var fs = require("fs");
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var net = require("net");
var express = require("express");
var webroot = path.join(__dirname, "..", "www");
var sendJade = require("./jade").sendJade;
var Server = require("../server");
var $util = require("../utilities");
var Logger = require("../logger");
var Config = require("../config");
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var db = require("../database");
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var httplog = new Logger.Logger(path.join(__dirname, "..", "..", "http.log"));
var suspiciousPath = (/admin|adm|\.\.|\/etc\/passwd|\\x5c|%5c|0x5c|setup|install|php|pma|blog|sql|scripts|aspx?|database/ig);
/**
* Determines whether a request is suspected of being illegitimate
*/
function isSuspicious(req) {
// ZmEu is a penetration script
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if (req.header("user-agent") &&
req.header("user-agent").toLowerCase() === "zmeu") {
return true;
}
if (req.path.match(suspiciousPath)) {
return true;
}
return false;
}
/**
* Extracts an IP address from a request. Uses X-Forwarded-For if the IP is localhost
*/
function ipForRequest(req) {
var ip = req.ip;
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if (ip === "127.0.0.1" || ip === "::1") {
var xforward = req.header("x-forwarded-for");
if (typeof xforward !== "string") {
xforward = [];
} else {
xforward = xforward.split(",");
}
for (var i = 0; i < xforward.length; i++) {
if (net.isIP(xforward[i])) {
return xforward[i];
}
}
return ip;
}
return ip;
}
/**
* Logs an HTTP request
*/
function logRequest(req, status) {
if (status === undefined) {
status = 200;
}
httplog.log([
ipForRequest(req),
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req.method,
req.path,
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req.header("user-agent")
].join(" "));
}
/**
* Redirects a request to HTTPS if the server supports it
*/
function redirectHttps(req, res) {
if (!req.secure && Config.get("https.enabled")) {
var ssldomain = Config.get("https.full-address");
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res.redirect(ssldomain + req.path);
return true;
}
return false;
}
/**
* Redirects a request to HTTP if the server supports it
*/
function redirectHttp(req, res) {
if (req.secure) {
var domain = Config.get("http.full-address");
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res.redirect(domain + req.path);
return true;
}
return false;
}
/**
* Handles a GET request for /r/:channel - serves channel.html
*/
function handleChannel(req, res) {
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if (redirectHttp(req, res)) {
return;
}
if (!$util.isValidChannelName(req.params.channel)) {
logRequest(req, 404);
res.status(404);
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res.send("Invalid channel name '" + req.params.channel + "'");
return;
}
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logRequest(req);
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var loginName = false;
if (req.cookies.auth) {
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loginName = req.cookies.auth.split(":")[0];
}
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var sio;
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if (net.isIPv6(ipForRequest(req))) {
sio = Config.get("io.ipv6-default");
}
if (!sio) {
sio = Config.get("io.ipv4-default");
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}
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sio += "/socket.io/socket.io.js";
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sendJade(res, "channel", {
channelName: req.params.channel,
loggedIn: loginName !== false,
loginName: loginName,
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sioSource: sio
});
}
/**
* Handles a request for the index page
*/
function handleIndex(req, res) {
logRequest(req);
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var loginName = false;
if (req.cookies.auth) {
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loginName = req.cookies.auth.split(":")[0];
}
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var channels = Server.getServer().packChannelList(true);
channels.sort(function (a, b) {
if (a.usercount === b.usercount) {
return a.uniqueName > b.uniqueName ? -1 : 1;
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}
return b.usercount - a.usercount;
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});
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sendJade(res, "index", {
loggedIn: loginName !== false,
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loginName: loginName,
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channels: channels
});
}
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/**
* Handles a request for the socket.io information
*/
function handleSocketConfig(req, res) {
logRequest(req);
res.type("application/javascript");
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var sioconfig = Config.get("sioconfig");
var iourl;
var ip = ipForRequest(req);
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var ipv6 = false;
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if (net.isIPv6(ip)) {
iourl = Config.get("io.ipv6-default");
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ipv6 = true;
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}
if (!iourl) {
iourl = Config.get("io.ipv4-default");
}
sioconfig += "var IO_URL='" + iourl + "';";
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sioconfig += "var IO_V6=" + ipv6 + ";";
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res.send(sioconfig);
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}
function handleUserAgreement(req, res) {
logRequest(req);
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var loginName = false;
if (req.cookies.auth) {
loginName = req.cookies.auth.split(":")[0];
}
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sendJade(res, "tos", {
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loggedIn: loginName !== false,
loginName: loginName,
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domain: Config.get("http.domain")
});
}
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function handleContactPage(req, res) {
logRequest(req);
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var loginName = false;
if (req.cookies.auth) {
loginName = req.cookies.auth.split(":")[0];
}
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// Make a copy to prevent messing with the original
var contacts = Config.get("contacts").map(function (c) {
return {
name: c.name,
email: c.email,
title: c.title
};
});
// Rudimentary hiding of email addresses to prevent spambots
contacts.forEach(function (c) {
c.emkey = $util.randomSalt(16)
var email = new Array(c.email.length);
for (var i = 0; i < c.email.length; i++) {
email[i] = String.fromCharCode(
c.email.charCodeAt(i) ^ c.emkey.charCodeAt(i % c.emkey.length)
);
}
c.email = escape(email.join(""));
c.emkey = escape(c.emkey);
});
sendJade(res, "contact", {
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loggedIn: loginName !== false,
loginName: loginName,
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contacts: contacts
});
}
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function static(dir) {
dir = path.join(__dirname, dir);
return function (req, res) {
try {
if (isSuspicious(req)) {
logRequest(req, 403);
res.status(403);
if (typeof req.header("user-agent") === "string" &&
req.header("user-agent").toLowerCase() === "zmeu") {
res.send("This server disallows requests from ZmEu.");
} else {
res.send("The request " + req.method.toUpperCase() + " " +
req.path + " looks pretty fishy to me. Double check that " +
"you typed it correctly.");
}
return;
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}
res.sendfile(req.path.replace(/^\//, ""), {
maxAge: Config.get("http.cache-ttl") * 1000,
root: dir
}, function (err) {
logRequest(req);
if (err) {
res.send(err.status);
}
});
} catch (e) {
Logger.errlog.log(e);
Logger.errlog.log(e.trace);
}
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};
}
module.exports = {
/**
* Initializes webserver callbacks
*/
init: function (app) {
app.use(express.json());
app.use(express.urlencoded());
app.use(express.cookieParser());
if (Config.get("http.minify")) {
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var cache = path.join(__dirname, "..", "..", "www", "cache")
if (!fs.existsSync(cache)) {
fs.mkdirSync(cache);
}
app.use(require("express-minify")({
cache: cache
}));
Logger.syslog.log("Enabled express-minify for CSS and JS");
}
/* Order here is important
* Since I placed /r/:channel above *, the function will
* not apply to the /r/:channel route. This prevents
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* duplicate logging, since /r/:channel"s callback does
* its own logging
*/
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app.get("/r/:channel", handleChannel);
app.get("/", handleIndex);
app.get("/sioconfig", handleSocketConfig);
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app.get("/useragreement", handleUserAgreement);
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app.get("/contact", handleContactPage);
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require("./auth").init(app);
require("./account").init(app);
require("./acp").init(app);
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app.use(static(path.join("..", "..", "www")));
app.use(function (err, req, res, next) {
if (err) {
if (err.message && err.message.match(/failed to decode param/i)) {
return res.status(400).send("Malformed path: " + req.path);
}
Logger.errlog.log(err.stack);
res.send(500);
} else {
next();
}
});
},
logRequest: logRequest,
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ipForRequest: ipForRequest,
redirectHttps: redirectHttps,
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redirectHttp: redirectHttp,
};