greenlock-express.js/index.js

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'use strict';
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var PromiseA;
try {
PromiseA = require('bluebird');
} catch(e) {
PromiseA = global.Promise;
}
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// opts.approveDomains(options, certs, cb)
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module.exports.create = function (opts) {
// accept all defaults for greenlock.challenges, greenlock.store, greenlock.middleware
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if (!opts._communityPackage) {
opts._communityPackage = 'greenlock-express.js';
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opts._communityPackageVersion = require('./package.json').version;
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}
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function explainError(e) {
console.error('Error:' + e.message);
if ('EACCES' === e.errno) {
console.error("You don't have prmission to access '" + e.address + ":" + e.port + "'.");
console.error("You probably need to use \"sudo\" or \"sudo setcap 'cap_net_bind_service=+ep' $(which node)\"");
return;
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}
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if ('EADDRINUSE' === e.errno) {
console.error("'" + e.address + ":" + e.port + "' is already being used by some other program.");
console.error("You probably need to stop that program or restart your computer.");
return;
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}
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console.error(e.code + ": '" + e.address + ":" + e.port + "'");
}
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function _createPlain(plainPort) {
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if (!plainPort) { plainPort = 80; }
var parts = String(plainPort).split(':');
var p = parts.pop();
var addr = parts.join(':').replace(/^\[/, '').replace(/\]$/, '');
var args = [];
var httpType;
var server;
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var validHttpPort = (parseInt(p, 10) >= 0);
if (addr) { args[1] = addr; }
if (!validHttpPort && !/(\/)|(\\\\)/.test(p)) {
console.warn("'" + p + "' doesn't seem to be a valid port number, socket path, or pipe");
}
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server = require('http').createServer(
greenlock.middleware.sanitizeHost(greenlock.middleware(require('redirect-https')()))
);
httpType = 'http';
return { server: server, listen: function () { return new Promise(function (resolve, reject) {
args[0] = p;
args.push(function () {
if (!greenlock.servername) {
if (Array.isArray(greenlock.approvedDomains) && greenlock.approvedDomains.length) {
greenlock.servername = greenlock.approvedDomains[0];
}
if (Array.isArray(greenlock.approveDomains) && greenlock.approvedDomains.length) {
greenlock.servername = greenlock.approvedDomains[0];
}
}
if (!greenlock.servername) {
resolve(null);
return;
}
return greenlock.check({ domains: [ greenlock.servername ] }).then(function (certs) {
if (certs) {
console.info("Using '%s' as default certificate", greenlock.servername);
return {
key: Buffer.from(certs.privkey, 'ascii')
, cert: Buffer.from(certs.cert + '\r\n' + certs.chain, 'ascii')
};
}
console.info("Fetching certificate for '%s' to use as default for HTTPS server...", greenlock.servername);
return new PromiseA(function (resolve, reject) {
// using SNICallback because all options will be set
greenlock.tlsOptions.SNICallback(greenlock.servername, function (err/*, secureContext*/) {
if (err) { reject(err); return; }
return greenlock.check({ domains: [ greenlock.servername ] }).then(function (certs) {
resolve({
key: Buffer.from(certs.privkey, 'ascii')
, cert: Buffer.from(certs.cert + '\r\n' + certs.chain, 'ascii')
});
}).catch(reject);
});
});
}).then(resolve).catch(reject);
});
server.listen.apply(server, args).on('error', function (e) {
if (server.listenerCount('error') < 2) {
console.warn("Did not successfully create http server and bind to port '" + p + "':");
explainError(e);
process.exit(41);
}
});
}); } };
}
function _create(port) {
if (!port) { port = 443; }
var parts = String(port).split(':');
var p = parts.pop();
var addr = parts.join(':').replace(/^\[/, '').replace(/\]$/, '');
var args = [];
var httpType;
var server;
var validHttpPort = (parseInt(p, 10) >= 0);
if (addr) { args[1] = addr; }
if (!validHttpPort && !/(\/)|(\\\\)/.test(p)) {
console.warn("'" + p + "' doesn't seem to be a valid port number, socket path, or pipe");
}
var https;
try {
https = require('spdy');
greenlock.tlsOptions.spdy = { protocols: [ 'h2', 'http/1.1' ], plain: false };
httpType = 'http2 (spdy/h2)';
} catch(e) {
https = require('https');
httpType = 'https';
}
var sniCallback = greenlock.tlsOptions.SNICallback;
greenlock.tlsOptions.SNICallback = function (domain, cb) {
sniCallback(domain, function (err, context) {
cb(err, context);
if (!context || server._hasDefaultSecureContext) {
return;
}
return greenlock.check({ domains: [ domain ] }).then(function (certs) {
// ignore the case that check doesn't have all the right args here
// to get the same certs that it just got (eventually the right ones will come in)
if (!certs) { return; }
console.info("Using '%s' as default certificate", domain);
server.setSecureContext({
key: Buffer.from(certs.privkey, 'ascii')
, cert: Buffer.from(certs.cert + '\r\n' + certs.chain, 'ascii')
});
server._hasDefaultSecureContext = true;
}).catch(function (/*e*/) {
// this may be that the test.example.com was requested, but it's listed
// on the cert for demo.example.com which is in its own directory, not the other
//console.warn("Unusual error: couldn't get newly authorized certificate:");
//console.warn(e.message);
});
});
};
server = https.createServer(
greenlock.tlsOptions
, greenlock.middleware.sanitizeHost(function (req, res) {
try {
greenlock.app(req, res);
} catch(e) {
console.error("[error] [greenlock.app] Your HTTP handler had an uncaught error:");
console.error(e);
try {
res.statusCode = 500;
res.end("Internal Server Error: [Greenlock] HTTP exception logged for user-provided handler.");
} catch(e) {
// ignore
// (headers may have already been sent, etc)
}
}
})
);
server.type = httpType;
return { server: server, listen: function () { return new PromiseA(function (resolve) {
args[0] = p;
args.push(function () { resolve(/*server*/); });
server.listen.apply(server, args).on('error', function (e) {
if (server.listenerCount('error') < 2) {
console.warn("Did not successfully create http server and bind to port '" + p + "':");
explainError(e);
process.exit(41);
}
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});
}); } };
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}
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// NOTE: 'greenlock' is just 'opts' renamed
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var greenlock = require('greenlock').create(opts);
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if (!opts.app) {
opts.app = function (req, res) {
res.end("Hello, World!\nWith Love,\nGreenlock for Express.js");
};
}
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opts.listen = function (plainPort, port, fnPlain, fn) {
var server;
var plainServer;
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// If there is only one handler for the `listening` (i.e. TCP bound) event
// then we want to use it as HTTPS (backwards compat)
if (!fn) {
fn = fnPlain;
fnPlain = null;
}
var obj1 = _createPlain(plainPort, true);
var obj2 = _create(port, false);
plainServer = obj1.server;
server = obj2.server;
server.then = obj1.listen().then(function (tlsOptions) {
if (tlsOptions) {
server.setSecureContext(tlsOptions);
server._hasDefaultSecureContext = true;
}
return obj2.listen().then(function () {
// Report plain http status
if ('function' === typeof fnPlain) {
fnPlain.apply(plainServer);
} else if (!fn && !plainServer.listenerCount('listening') && !server.listenerCount('listening')) {
console.info('[:' + (plainServer.address().port || plainServer.address())
+ "] Handling ACME challenges and redirecting to " + server.type);
}
// Report h2/https status
if ('function' === typeof fn) {
fn.apply(server);
} else if (!server.listenerCount('listening')) {
console.info('[:' + (server.address().port || server.address()) + "] Serving " + server.type);
}
});
}).then;
server.unencrypted = plainServer;
return server;
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};
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opts.middleware.acme = function (opts) {
return greenlock.middleware.sanitizeHost(greenlock.middleware(require('redirect-https')(opts)));
};
opts.middleware.secure = function (app) {
return greenlock.middleware.sanitizeHost(app);
};
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return greenlock;
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};