express-out-type/express-out-type.js

Middleware to intercept res.render to output raw template, locals ou current function

var path = require('path');
var fs = require('fs');

module.exports = function(req, res, next) {
	var render = res.render;

	res.render = function(view, locals, callback) {

		if ( req.query.out == 'script' )  {
			//endsWith ? res.render(__filename);}
			res.setHeader('content-type', 'text/javascript');

			var fx = function(x) {
				try {
					if ( x.caller )
						return fx( x.caller )
					else
						return x;
				} catch(err) {
					return x;
				}
			}

			//res.send(arguments.callee.caller.caller.caller.toString());
			res.send(fx(arguments.callee).toString());
		}

		else

		if ( req.query.out == 'json' ) {
			res.setHeader('content-type', 'application/json');
			res.json(res.locals);
		}

		else

		if ( req.query.out == 'template' ) {
			var fx = function(x) {
				var n = 0;
				var recursive = function(x) {
					n++;
					
					try {
						if ( x.caller ) 
							return recursive( x.caller )
						else 
							return x;
					} catch(err) {
						return x;
					}
				}
				recursive(x);
				return n;
			}

			var n = fx(arguments.callee);
			var filename = _getCallerFile(n);
			
			//				--- x ---

			var views = req.app.get('views');
			var routes = path.resolve(views + '/../routes');

			var relative = filename.substring(routes.length + 1);
			var relative = relative.slice(0, -3);
			var relative = relative.replace(/\\/g, '/');
			var relative = relative + '.html';

			var absolute = path.join(views, relative);			

			var s = fs.readFileSync(absolute, 'utf8');
			res.setHeader('content-type', 'text/html');
			res.send(s);
		}

		else

		render.call(res, view, locals, callback);
	}

	next();
}

function _getCallerFile(n) {
    try {
        var err = new Error();
        var callerfile;
        var currentfile;

        Error.prepareStackTrace = function (err, stack) { return stack; };

        currentfile = err.stack.shift().getFileName();

		for (var i = 0; i < n; i++) {
            callerfile = err.stack.shift().getFileName();
		}

		return callerfile;
    } catch (err) {}
    return undefined;
}