nyc-bookstores/node_modules/router/index.js
2013-05-27 13:45:59 -07:00

92 lines
2.1 KiB
JavaScript

var matcher = require('./matcher');
var formatter = require('./formatter');
var METHODS = ['get', 'post', 'put', 'del' , 'delete', 'head', 'options'];
var HTTP_METHODS = ['GET', 'POST', 'PUT', 'DELETE', 'DELETE', 'HEAD', 'OPTIONS'];
var noop = function() {};
var error = function(res) {
return function() {
res.statusCode = 404;
res.end();
};
};
var router = function() {
var methods = {};
var traps = {};
HTTP_METHODS.forEach(function(method) {
methods[method] = [];
});
var route = function(req, res, next) {
var method = methods[req.method];
var trap = traps[req.method];
var index = req.url.indexOf('?');
var url = index === -1 ? req.url : req.url.substr(0, index);
var i = 0;
next = next || error(res);
if (!method) return next();
var loop = function(err) {
if (err) return next(err);
while (i < method.length) {
var route = method[i];
i++;
req.params = route.pattern(url);
if (!req.params) continue;
if (route.rewrite) {
req.url = url = route.rewrite(req.params)+(index === -1 ? '' : req.url.substr(index));
}
route.fn(req, res, loop);
return;
}
if (!trap) return next();
trap(req, res, next);
};
loop();
};
METHODS.forEach(function(method, i) {
route[method] = function(pattern, rewrite, fn) {
if (Array.isArray(pattern)) {
pattern.forEach(function(item) {
route[method](item, rewrite, fn);
});
return;
}
if (!fn && !rewrite) return route[method](null, null, pattern);
if (!fn && typeof rewrite === 'string') return route[method](pattern, rewrite, route);
if (!fn && typeof rewrite === 'function') return route[method](pattern, null, rewrite);
if (!fn) return route;
(route.onmount || noop)(pattern, rewrite, fn);
if (!pattern) {
traps[HTTP_METHODS[i]] = fn;
return route;
}
methods[HTTP_METHODS[i]].push({
pattern:matcher(pattern),
rewrite:formatter(rewrite),
fn:fn
});
return route;
};
});
route.all = function(pattern, rewrite, fn) {
METHODS.forEach(function(method) {
route[method](pattern, rewrite, fn);
});
return route;
};
return route;
};
module.exports = router;