try-to-run: If happen AppCrash then try to run app again.
If happen AppCrash then try to run app again. Easy to use. Relaunch your app.js.
Installing
npm install try-to-run
Usage example
app.js
"use strict";
/* longer version */
var try_to_run = require("./../index");
//var try_to_run = require("try-to-run");
var isMainThread = try_to_run(__filename, 20);
if (isMainThread) return;
/* short version */
//if (require("try-to-run")()) return;
console.time("Time");
var http = require("http");
var port = process.env.PORT || 1337;
var server = http.createServer();
// Console log
server.on("request", function (req, res) {
console.timeLog("Time", "Url: " + req.headers.host + req.url);
});
// Simulated crash ...
server.on("request", function (req, res) {
if (req.url === "/crash") { throw new Error("Simulated crash ..."); }
});
// Shutdown ...
server.on("request", function (req, res) {
if (req.url === "/shutdown") { require("worker_threads").parentPort.postMessage("kill"); }
});
// Test page.
server.on("request", function (req, res) {
if (req.url === "/") {
res.writeHead(200, { "Content-Type": "text/html; charset=UTF-8" });
res.end(`
<!doctype html>
<html>
<head>
<title>Test</title>
</head>
<body>
Test ... <a href="/crash">crash</a>
</body>
</html>`);
}
else {
console.warn("Warning: 404 Not Found. Url: " + req.headers.host + req.url);
res.writeHead(404, { "Content-Type": "text/plain" });
res.end("404 Not Found Url: " + req.url);
}
});
server.listen(port, function (err) {
if (err)
console.error(err)
else
console.log("\r\nWebserver port:" + port + " pid:" + process.pid);
});
var url = `http://localhost${(port === 443 || port === 80 ? '' : ':' + port)}/`;
require("browse-url")(url);or index.js
"use strict";
require("try_to_run")("app.js");Eval: run a code string
The built-in eval function allows to execute a string of code.
var code = 'setTimeout(function () { throw new Error("Simulated crash ..."); }, 1000);';
require("try-to-run")(code, 20);License
Copyright (c) 2021 Manuel Lõhmus manuel@hauss.ee