stick/lib/middleware/notfound.js

JSGI based webapp framework

/**
 * @fileOverview Middleware for simple Not-Found pages.
 *
 * By default, resource `stick/middleware/notfound.html` is used as page template.
 * This can be set through the `app.notfound.template` property.
 *
 *  * __template__ the notfound page template (_string_)
 *
 * @example
 * app.configure("notfound");
 * app.notfound.template = "templates/404.html";
 */

/**
 * Stick middleware for simple 404-Not-Found pages.
 * @param {Function} next the wrapped middleware chain
 * @param {Object} app the Stick Application object
 * @returns {Function} a JSGI middleware function
 */

var escapeHtml = require("common-utils/strings").escapeHtml;

exports.middleware = function notfound(next, app) {

    app.notfound = {
        template: resolve(module, 'notfound.html')
    };

    return function notfound(request) {
        try {
            return next(request);
        } catch (e) {
        	if(e.notfound) {
	            var template = getResource(app.notfound.template);
	            var body = template.content.replace(/\{\{\s*(\w+)\s*\}\}/g, function(match, group) {
	                switch(group) {
	                    case "title":
	                        return app.notfound.title || "Not Found";
	                    case "body":
	                        return app.notfound.body || "<p>The requested URL <b>"
	                                + escapeHtml(request.scriptName) + escapeHtml(request.pathInfo)
	                                + "</b> was not found on the server.</p>";
	                    default:
	                        return "";
	                }
	            });
	            return {
	                status: 404,
	                headers: {"Content-Type": "text/html"},
	                body: [body]
	            };
        	} else {
        		throw e;
        	}
        }
    };
};