telebit.js/lib/eggspress.js

103 lines
2.6 KiB
JavaScript

'use strict';
function eggSend(obj) {
/*jslint validthis: true*/
var me = this;
if (!me.getHeader('content-type')) {
me.setHeader('Content-Type', 'application/json');
}
me.end(JSON.stringify(obj));
}
module.exports = function eggspress() {
//var patternsMap = {};
var allPatterns = [];
var app = function (req, res) {
var patterns = allPatterns.slice(0).reverse();
function next(err) {
if (err) {
req.end(err.message);
return;
}
var todo = patterns.pop();
if (!todo) {
console.log('[eggspress] Did not match any patterns', req.url);
require('finalhandler')(req, res)();
return;
}
// '', GET, POST, DELETE
if (todo[2] && req.method.toLowerCase() !== todo[2]) {
//console.log("[eggspress] HTTP method doesn't match", req.url);
next();
return;
}
var urlstr = (req.url.replace(/\/$/, '') + '/');
if (!urlstr.match(todo[0])) {
//console.log("[eggspress] pattern doesn't match", todo[0], req.url);
next();
return;
} else if ('string' === typeof todo[0] && 0 !== urlstr.match(todo[0]).index) {
//console.log("[eggspress] string pattern is not the start", todo[0], req.url);
next();
return;
}
function fail(e) {
console.error("[eggspress] error", todo[2], todo[0], req.url);
console.error(e);
// TODO make a nice error message
res.end(e.message);
}
try {
console.log("[eggspress] matched pattern", todo[0], req.url);
var p = todo[1](req, res, next);
if (p && p.catch) {
p.catch(fail);
}
} catch(e) {
fail(e);
return;
}
}
res.send = eggSend;
next();
};
app.use = function (pattern, fn) {
return app._use('', pattern, fn);
};
[ 'HEAD', 'GET', 'POST', 'DELETE' ].forEach(function (method) {
app[method.toLowerCase()] = function (pattern, fn) {
return app._use(method, pattern, fn);
};
});
app.post = function (pattern, fn) {
return app._use('POST', pattern, fn);
};
app._use = function (method, pattern, fn) {
// always end in a slash, for now
if ('string' === typeof pattern) {
pattern = pattern.replace(/\/$/, '') + '/';
}
/*
if (!patternsMap[pattern]) {
patternsMap[pattern] = [];
}
patternsMap[pattern].push(fn);
patterns = Object.keys(patternsMap).sort(function (a, b) {
return b.length - a.length;
});
*/
allPatterns.push([pattern, fn, method.toLowerCase()]);
return app;
};
return app;
};