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untested separation of concerns

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AJ ONeal 2016-02-12 20:04:40 -05:00
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135
README.md
View File

@ -2,7 +2,6 @@
Free SSL and managed or automatic HTTPS for node.js with Express, Connect, and other middleware systems.
## Install
```
@ -95,7 +94,7 @@ node -e 'require("letsencrypt-express").testing().create( require("express")().u
'use strict';
// Note: using staging server url, remove .testing() for production
var lex = require('letsencrypt-express').testing();
var LEX = require('letsencrypt-express').testing();
var express = require('express');
var app = express();
@ -103,22 +102,22 @@ app.use('/', function (req, res) {
res.send({ success: true });
});
lex.create({
LEX.create({
configDir: './letsencrypt.config' // ~/letsencrypt, /etc/letsencrypt, whatever you want
, onRequest: app // your express app (or plain node http app)
, letsencrypt: null // you can provide you own instance of letsencrypt
// if you need to configure it (with an agreeToTerms
// callback, for example)
, approveRegistration: function (hostname, cb) { // PRODUCTION MODE needs this function, but only if you want
// automatic registration (usually not necessary)
// renewals for registered domains will still be automatic
cb(null, {
domains: [hostname]
, email: 'user@example.com'
, agreeTos: true // you
, agreeTos: true // you
});
}
}).listen([80], [443, 5001], function () {
@ -164,6 +163,42 @@ console.log(results.plainServers);
console.log(results.tlsServers);
```
### Use with raw http / https modules
Let's say you want to redirect all http to https.
```
var http = require('http');
var https = require('https');
var LEX = require('letsencrypt-express');
var LE = require('letsencrypt');
var lex = LEX.create({
configDir: __dirname + '/letsencrypt.config'
, approveRegistration: function (hostname, cb) {
cb(null, {
domains: [hostname]
, email: 'user@example.com'
, agreeTos: true
});
}
});
http.createServer(LEX.createAcmeResponder(lex, function redirectHttps(req, res) {
res.setHeader('Location', 'https://' + req.headers.host + req.url);
res.end('<!-- Hello Mr Developer! Please use HTTPS instead -->');
}));
var app = require('express')();
app.use('/', function (req, res) {
res.end('Hello!');
});
https.createServer(lex.httpsOptions, LEX.createAcmeResponder(lex, app));
```
### WebSockets with Let's Encrypt
Note: you don't need to create websockets for the plain ports.
@ -180,7 +215,7 @@ function onConnection(ws) {
var location = url.parse(ws.upgradeReq.url, true);
// you might use location.query.access_token to authenticate or share sessions
// or ws.upgradeReq.headers.cookie (see http://stackoverflow.com/a/16395220/151312)
ws.on('message', function incoming(message) {
console.log('received: %s', message);
});
@ -229,7 +264,20 @@ LEX.createSniCallback(opts) // this will call letsencrypt.renew and letsencr
// uses `opts.webrootPath` to read from the filesystem
LEX.getChallenge(opts, hostname, key cb)
LEX.getChallenge(opts, hostname, key cb)
LEX.createAcmeResponder(opts, fn) // this will return the necessary request handler for /.well-known/acme-challenges
// which then calls `fn` (such as express app) to complete the request
//
// opts lex instance created with LEX.create(opts)
// more generally, any object with a compatible `getChallenge` will work:
// `lex.getChallenge(opts, domain, key, function (err, val) {})`
//
// fn function (req, res) {
// console.log(req.method, req.url);
//
// res.end('Hello!');
// }
```
## Options
@ -286,6 +334,77 @@ server: url // url use letsencrypt.productionServerUr
// default production
```
### Fullest Example Ever
Here's absolutely every option and function exposed
```
var http = require('http');
var https = require('https');
var LEX = require('letsencrypt-express');
var LE = require('letsencrypt');
var lex;
lex = LEX.create({
webrootPath: '/tmp/.well-known/acme-challenge'
, lifetime: 90 * 24 * 60 * 60 * 1000 // expect certificates to last 90 days
, failedWait: 5 * 60 * 1000 // if registering fails wait 5 minutes before trying again
, renewWithin: 3 * 24 * 60 * 60 * 1000 // renew at least 3 days before expiration
, memorizeFor: 1 * 24 * 60 * 60 * 1000 // keep certificates in memory for 1 day
, approveRegistration: function (hostname, cb) {
cb(null, {
domains: [hostname]
, email: 'user@example.com'
, agreeTos: true
});
}
, handleRenewFailure: function (err, hostname, certInfo) {
console.error("ERROR: Failed to renew domain '", hostname, "':");
if (err) {
console.error(err.stack || err);
}
if (certInfo) {
console.error(certInfo);
}
}
, letsencrypt: LE.create(
// options
{ configDir: './letsencrypt.config'
, server: LE.productionServerUrl
, privkeyPath: LE.privkeyPath
, fullchainPath: LE.fullchainPath
, certPath: LE.certPath
, chainPath: LE.chainPath
, renewalPath: LE.renewalPath
, accountsDir: LE.accountsDir
, debug: false
}
// handlers
, { setChallenge: LEX.setChallenge
, removeChallenge: LEX.removeChallenge
}
)
, debug: false
});
http.createServer(LEX.createAcmeResponder(lex, function (req, res) {
res.setHeader('Location', 'https://' + req.headers.host + req.url);
res.end('<!-- Hello Mr Developer! Please use HTTPS instead -->');
}));
https.createServer(lex.httpsOptions, LEX.createAcmeResponder(lex, function (req, res) {
res.end('Hello!');
}));
```
## Heroku?
This doesn't work on heroku because heroku uses a proxy with built-in https

9
bin/lex.js
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@ -151,7 +151,7 @@ cli.main(function(_, options) {
function startServers() {
// Note: using staging server url, remove .testing() for production
var LE = require('letsencrypt');
var challengeStore = require('../lib/challenge-handlers');
var LEX = require('../');
var le = LE.create({
configDir: configDir
, manual: true
@ -163,10 +163,9 @@ cli.main(function(_, options) {
, renewalPath: LE.renewalPath
, accountsDir: LE.accountsDir
}, {
setChallenge: challengeStore.set
, removeChallenge: challengeStore.remove
setChallenge: LEX.setChallenge
, removeChallenge: LEX.removeChallenge
});
var lex = require('../');
var app = express();
var vhosts = {};
@ -192,7 +191,7 @@ cli.main(function(_, options) {
});
app.use('/', express.static(path.join(__dirname, '..', 'lib', 'public')));
lex.create({
LEX.create({
onRequest: app
, configDir: configDir
, letsencrypt: le

19
lib/sni-callback.js
View File

@ -4,12 +4,23 @@ var crypto = require('crypto');
var tls = require('tls');
module.exports.create = function (opts) {
var ipc = {}; // in-process cache
// function (/*err, hostname, certInfo*/) {}
function handleRenewFailure(err, hostname, certInfo) {
console.error("ERROR: Failed to renew domain '", hostname, "':");
if (err) {
console.error(err.stack || err);
}
if (certInfo) {
console.error(certInfo);
}
}
if (!opts) { throw new Error("requires opts to be an object"); }
if (opts.debug) {
console.debug("[LEX] creating sniCallback", JSON.stringify(opts, null, ' '));
}
var ipc = {}; // in-process cache
if (!opts) { throw new Error("requires opts to be an object"); }
if (!opts.letsencrypt) { throw new Error("requires opts.letsencrypt to be a letsencrypt instance"); }
if (!opts.lifetime) { opts.lifetime = 90 * 24 * 60 * 60 * 1000; }
@ -19,7 +30,7 @@ module.exports.create = function (opts) {
if (!opts.approveRegistration) { opts.approveRegistration = function (hostname, cb) { cb(null, null); }; }
//opts.approveRegistration = function (hostname, cb) { cb(null, null); };
if (!opts.handleRenewFailure) { opts.handleRenewFailure = function (/*err, hostname, certInfo*/) {}; }
if (!opts.handleRenewFailure) { opts.handleRenewFailure = handleRenewFailure; }
function assignBestByDates(now, certInfo) {
certInfo = certInfo || { loadedAt: now, expiresAt: 0, issuedAt: 0, lifetime: 0 };

95
lib/standalone.js
View File

@ -5,6 +5,39 @@ var challengeStore = require('./challenge-handlers');
var createSniCallback = require('./sni-callback').create;
var LE = require('letsencrypt');
function createAcmeResponder(obj, onRequest) {
function httpAcmeResponder(req, res) {
if (LEX.debug) {
console.debug('[LEX] ', req.method, req.headers.host, req.url);
}
var acmeChallengePrefix = '/.well-known/acme-challenge/';
if (0 !== req.url.indexOf(acmeChallengePrefix)) {
onRequest(req, res);
return;
}
var key = req.url.slice(acmeChallengePrefix.length);
obj.getChallenge({
debug: LEX.debug || obj.debug
}, req.headers.host, key, function (err, val) {
if (LEX.debug) {
console.debug('[LEX] GET challenge, response:');
console.debug('challenge:', key);
console.debug('response:', val);
if (err) {
console.debug(err.stack);
}
}
res.end(val || '_');
});
}
return httpAcmeResponder;
}
function lexHelper(obj, app) {
var defaultPems = require('localhost.daplie.com-certificates');
@ -32,19 +65,14 @@ function lexHelper(obj, app) {
if (!obj.getChallenge) {
if (false !== obj.getChallenge) {
obj.getChallenge = challengeStore.get;
obj.getChallenge = LEX.getChallenge;
}
if (!obj.webrootPath) {
obj.webrootPath = path.join(require('os').tmpdir(), 'acme-challenge');
}
}
if (!obj.onRequest && false !== obj.onRequest) {
console.warn("You should either do args.onRequest = app or server.on('request', app),"
+ " otherwise only acme-challenge requests will be handled (and the rest will hang)");
console.warn("You can silence this warning by setting args.onRequest = false");
}
// BEGIN LetsEncrypt options
if (!obj.configDir) {
obj.configDir = path.join(require('homedir')(), '/letsencrypt/etc');
}
@ -60,17 +88,21 @@ function lexHelper(obj, app) {
if (!obj.chainPath) {
obj.chainPath = ':config/live/:hostname/chain.pem';
}
if (!obj.server) {
obj.server = LEX.defaultServerUrl;
}
// END LetsEncrypt options
obj.getChallenge = obj.getChallenge || LEX.getChallenge;
obj.setChallenge = obj.setChallenge || LEX.setChallenge;
obj.removeChallenge = obj.removeChallenge || LEX.removeChallenge;
if (!obj.letsencrypt) {
//LE.merge(obj, );
// { configDir, webrootPath, server }
obj.letsencrypt = LE.create(obj, {
setChallenge: challengeStore.set
, removeChallenge: challengeStore.remove
setChallenge: obj.setChallenge
, removeChallenge: obj.removeChallenge
});
}
@ -132,39 +164,6 @@ function lexHelper(obj, app) {
httpsOptions.SNICallback = createSniCallback(obj);
}
function createAcmeResponder(onRequest) {
function httpAcmeResponder(req, res) {
if (LEX.debug) {
console.debug('[LEX] ', req.method, req.headers.host, req.url);
}
var acmeChallengePrefix = '/.well-known/acme-challenge/';
if (0 !== req.url.indexOf(acmeChallengePrefix)) {
onRequest(req, res);
return;
}
var key = req.url.slice(acmeChallengePrefix.length);
obj.getChallenge(obj, req.headers.host, key, function (err, val) {
if (LEX.debug) {
console.debug('[LEX] GET challenge, response:');
console.debug('challenge:', key);
console.debug('response:', val);
if (err) {
console.debug(err.stack);
}
}
res.end(val || '_');
});
}
return httpAcmeResponder;
}
obj.httpAcmeResponder = createAcmeResponder(obj.onHttpRequest||obj.onRequest);
obj.httpsAcmeResponder = createAcmeResponder(obj.onHttpsRequest||obj.onRequest);
obj.httpsOptions = httpsOptions;
return obj;
@ -175,6 +174,14 @@ function LEX(obj, app) {
var http = require('http');
function listen(plainPorts, tlsPorts, onListening) {
if (!(obj.onRequest || (obj.onHttpRequest && obj.onHttpsRequest)) && false !== obj.onRequest) {
console.warn("You should either do args.onRequest = app or server.on('request', app),"
+ " otherwise only acme-challenge requests will be handled (and the rest will hang)");
console.warn("You can silence this warning by setting args.onRequest = false");
}
obj.httpAcmeResponder = createAcmeResponder(obj, obj.onHttpRequest || obj.onRequest);
obj.httpsAcmeResponder = createAcmeResponder(obj, obj.onHttpsRequest || obj.onRequest);
if (plainPorts && (!Array.isArray(plainPorts) || !Array.isArray(tlsPorts))) {
throw new Error(".listen() must be used with plain and tls port arrays, like this: `.listen([80], [443, 5001], function () {})`");
}
@ -293,6 +300,8 @@ LEX.middleware = function (defaults) {
LEX.stagingServerUrl = LE.stagingServerUrl;
LEX.productionServerUrl = LE.productionServerUrl || LE.liveServerUrl;
LEX.defaultServerUrl = LEX.productionServerUrl;
LEX.createAcmeResponder = createAcmeResponder;
LEX.normalizeOptions = lexHelper;
LEX.testing = function () {
LEX.debug = true;
LEX.defaultServerUrl = LEX.stagingServerUrl;