greenlock.js/lib/middleware.js

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'use strict';
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var utils = require('./utils');
function log(debug) {
if (debug) {
var args = Array.prototype.slice.call(arguments);
args.shift();
args.unshift("[le/lib/middleware.js]");
console.log.apply(console, args);
}
}
module.exports.create = function (le) {
if (!le.challenge || !le.challenge.get) {
throw new Error("middleware requires challenge plugin with get method");
}
log(le.debug, "created middleware");
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return function (_app) {
if (_app && 'function' !== typeof _app) {
throw new Error("use le.middleware() or le.middleware(function (req, res) {})");
}
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var prefix = le.acmeChallengePrefix || '/.well-known/acme-challenge/';
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return function (req, res, next) {
if (0 !== req.url.indexOf(prefix)) {
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log(le.debug, "no match, skipping middleware");
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if (_app) {
_app(req, res, next);
}
else {
next();
}
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return;
}
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log(le.debug, "this must be tinder, 'cuz it's a match!");
var token = req.url.slice(prefix.length);
var hostname = req.hostname || (req.headers.host || '').toLowerCase().replace(/:.*/, '');
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log(le.debug, "hostname", hostname, "token", token);
var copy = utils.merge({ domains: [ hostname ] }, le);
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copy = utils.tplCopy(copy);
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// TODO tpl copy?
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le.challenge.get(copy, hostname, token, function (err, secret) {
if (err || !token) {
res.statusCode = 404;
res.setHeader('Content-Type', 'application/json; charset=utf-8');
res.end('{ "error": { "message": "Error: These aren\'t the tokens you\'re looking for. Move along." } }');
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return;
}
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res.setHeader('Content-Type', 'text/plain; charset=utf-8');
res.end(secret);
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});
};
};
};