express.js

var express = require('express'),
    path = require('path'),
    sr   = require('./tools/static_require'),
    fs   = require('fs');

var HOST = '0.0.0.0',
    PORT = 8000;

var examplesPath = path.join(__dirname, 'examples');
var existsSync = fs.existsSync || path.existsSync;

app = express.createServer();

app.set('views', path.join(examplesPath, 'views'));


app.get('/perf', sr.getAppHandler('Benchmark runner', '/perf/runner.js'));

app.get('/', function(req, res) {
    res.redirect('/examples/');
});

app.get('/examples/', function(req, res) {
    var exampleList = listExamples(examplesPath).map(function(name) {
        var filePath = path.join(examplesPath, name),
            code = getExampleCode(filePath);

        return {
            path: name + '/',
            title: extractExampleTitle(code),
            order: extractExampleOrder(code)
        };
    }).filter(function(a) {
        return a.order > 0;
    }).sort(function(a, b) {
        return a.order*1 - b.order*1;
    });
    res.render('exampleList.jade', {
        layout: false,
        locals: { exampleList: exampleList }
    });
});

app.get('/examples/:type/:example/', function(req, res) {
    var filePath = path.join(examplesPath, req.param('type'), req.param('example')),
        page = getExamplePage(filePath);

    if (page) {
        res.send(page);
    } else {
        var code = getExampleCode(filePath);
        res.render('example.jade', {
            layout: false,
            locals: {
                html: extractExampleHtml(code),
                title: extractExampleTitle(code)
            }
        });
    }
});

app.get('/test/*test.js', function(req, res){
    res.sendfile(req.url.substring(1));
});

app.get('/test/qunit/*', function(req, res){
    res.sendfile(req.url.substring(1));
});

app.get('*.js', sr.getHandler({
    searchPaths: [
      fs.realpathSync(path.join(__dirname, 'src'))
    ]
}));

app.get('/*', function(req, res) {
    res.sendfile(req.param(0));
});

require('util').puts("Server at http://" + HOST + ":" + PORT + "/");
app.listen(PORT, HOST);

function getExamplePage (filePath) {
    name = path.basename(filePath);
    htmlPath = path.join(filePath, name + '.html');
    if (existsSync(htmlPath)) {
        return fs.readFileSync(htmlPath);
    } else {
        return false;
    }
}

function listExamples (filePath) {
    var result = [];
    fs.readdirSync(filePath).forEach(function(name) {
        if (existsSync(path.join(filePath, name, name + '.js'))) {
            result.push(name);
        } else if ( fs.statSync(path.join(filePath, name)).isDirectory() ) {
            result = result.concat(listExamples(path.join(filePath, name)).map(function(subname) {
                return path.join(name, subname);
            }));
        }
    });
    return result;
}

function getExampleCode (filePath) {
    var name = path.basename(filePath),
        jsPath = path.join(filePath, name + '.js');

    return fs.readFileSync(jsPath, 'utf8');
}

function extractExampleHtml (code) {
    var match = code.match(/@example_html((.|[\n\r])*)\*\//);
    return match ? match[1] : '';
}

function extractExampleTitle (code) {
    var match = code.match(/@example_title(.*)/);
    return match ? match[1].trim() : 'Untitled';
}

function extractExampleOrder (code) {
    var match = code.match(/@example_order(.*)/);
    return match ? match[1].trim()*1 : 9e6;
}