76 lines
2.0 KiB
JavaScript
76 lines
2.0 KiB
JavaScript
"use strict";
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var Worker = module.exports;
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// *very* generous, but well below the http norm of 120
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var messageTimeout = 30 * 1000;
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var msgPrefix = "greenlock:";
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Worker.create = function() {
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var greenlock = {};
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["getAcmeHttp01ChallengeResponse", "get", "notify", "_notify"].forEach(function(k) {
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greenlock[k] = function(args) {
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return rpc(k, args);
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};
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});
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var worker = {
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ready: function(fn) {
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var servers = require("./servers.js").create(greenlock);
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fn(servers);
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return worker;
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},
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master: function() {
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// ignore
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return worker;
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},
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serve: function(fn) {
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// keeping backwards compat
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if (1 === fn.length) {
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worker.ready(fn);
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return;
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}
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// serving the express app, right away
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worker.ready(function(glx) {
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glx.serveApp(fn);
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});
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}
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};
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// backwards compat starts early...
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worker.serve = worker.ready;
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return worker;
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};
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function rpc(funcname, msg) {
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return new Promise(function(resolve, reject) {
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var rnd = Math.random()
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.toString()
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.slice(2)
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.toString(16);
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var id = msgPrefix + rnd;
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var timeout;
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function getResponse(msg) {
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if (msg._id !== id) {
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return;
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}
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process.removeListener("message", getResponse);
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clearTimeout(timeout);
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resolve(msg._result);
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}
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// TODO keep a single listener than just responds
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// via a collection of callbacks? or leave as is?
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process.on("message", getResponse);
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process.send({
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_id: id,
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_funcname: funcname,
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_input: msg
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});
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timeout = setTimeout(function() {
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process.removeListener("message", getResponse);
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reject(new Error("worker rpc request timeout"));
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}, messageTimeout);
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});
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}
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