nyc-bookstores/node_modules/router/README.md

Router

A lean and mean http router for node.js.
It is available through npm:

npm install router

Usage

Router does one thing and one thing only - route http requests.

var http = require('http');
var router = require('router');
var route = router();

route.get('/', function(req, res) {
	res.writeHead(200);
	res.end('hello index page');
});

http.createServer(route).listen(8080); // start the server on port 8080

If you want to grap a part of the path you can use capture groups in the pattern:

route.get('/{base}', function(req, res) {
	var base = req.params.base; // ex: if the path is /foo/bar, then base = foo
});

The capture patterns matches until the next / or character present after the group

route.get('/{x}x{y}', function(req, res) {
	// if the path was /200x200, then req.params = {x:'200', y:'200'}
});

Optional patterns are supported by adding a ? at the end

route.get('/{prefix}?/{top}', function(req, res) {
	// matches both '/a/b' and '/b'
});

If you want to just match everything you can use a wildcard * which works like unix wildcards

route.get('/{prefix}/*', function(req, res) {
	// matches both '/a/', '/a/b', 'a/b/c' and so on.
	// the value of the wildcard is available through req.params.wildcard
});

If the standard capture groups aren't expressive enough for you can specify an optional inline regex

route.get('/{digits}([0-9]+)', function(req, res) {
	// matches both '/24' and '/424' but not '/abefest' and so on.
});

You can also use regular expressions and the related capture groups instead:

route.get(/^\/foo\/(\w+)/, function(req, res) {
	var group = req.params[1]; // if path is /foo/bar, then group is bar
});

Methods

• route.get: Match GET requests
• route.post: Match POST requests
• route.put: Match PUT requests
• route.head: Match HEAD requests
• route.del: Match DELETE requests
• route.options: Match OPTIONS requests
• route.all: Match all above request methods.

Error handling

By default Router will return 404 if you no route matched. If you want to do your own thing you can give it a callback:

route(req, res, function() {
	// no route was matched
	res.writeHead(404);
	res.end();
});

You can also provide a catch-all to a given route that is called if no route was matched:

route.get(function(req, res) {
	// called if no other get route matched
	res.writeHead(404);
	res.end('no GET handler found');
});