您好,我对 node.js 和 javascript 非常陌生,我正在尝试使用 nodejs 集群模块创建一个 culster.js,在我的 if 语句结束时,我正在调用 server.js 来启动应用程序。
集群.js
const cluster = require('cluster');
const cpuCount = require('os').cpus().length;
const startServer = require('./server');
if (cluster.isMaster) {
for (let i = 0; i < cpuCount; i += 1) {
cluster.fork();
}
cluster.on('exit', () => {
cluster.fork();
});
} else {
return startServer;
}
服务器.js
const fs = require('fs');
const path = require('path');
const express = require('express');
const auth = require('http-auth');
const {
createBundleRenderer,
} = require('vue-server-renderer');
const bundle = fs.readFileSync('dist/server.js', 'utf-8');
const renderer = createBundleRenderer(bundle);
function parseIndexHtml() {
const [
entire,
htmlOpen,
htmlOpenTailAndHead,
headCloseAndBodyOpen,
bodyOpenTailAndContentBeforeApp,
contentAfterAppAndHtmlClose,
] = fs.readFileSync('index.html', 'utf8').match(/^([\s\S]+?<html)([\s\S]+?)(<\/head>[\s\S]*?<body)([\s\S]+?)<div id="?app"?><\/div>([\s\S]+)$/);
return {
entire,
htmlOpen,
htmlOpenTailAndHead,
headCloseAndBodyOpen,
bodyOpenTailAndContentBeforeApp,
contentAfterAppAndHtmlClose,
};
}
const indexHtml = parseIndexHtml();
const app = express();
const basicAuth = auth.basic({
realm: 'Jobportal',
}, (username, password, callback) => {
callback(username === 'x' && password === 'x');
});
app.get('/ping', (request, response) => {
response.status(200).end();
});
app.use(auth.connect(basicAuth));
// serve pure static assets
app.use('/public', express.static(path.resolve('./public')));
app.use('/dist', express.static(path.resolve('./dist')));
app.get('*', (request, response) => {
const context = {
url: request.url,
};
renderer.renderToString(context, (error, html) => {
if (error) {
if (error.code === '404') {
response.status(404).end(indexHtml.entire);
} else {
response.status(500).end(indexHtml.entire);
console.error(`Error during render: ${request.url}`); // eslint-disable-line
console.error(error); // eslint-disable-line
}
return;
}
const {
title,
htmlAttrs,
bodyAttrs,
link,
style,
script,
noscript,
meta,
} = context.meta.inject();
response.write(
`${indexHtml.htmlOpen} data-vue-meta-server-rendered ${htmlAttrs.text()} ${indexHtml.htmlOpenTailAndHead}
${meta.text()}
${title.text()}
${link.text()}
${style.text()}
${script.text()}
<script>
window.__INITIAL_STATE__ = ${JSON.stringify(context.initialState)}
</script>
${noscript.text()}
${indexHtml.headCloseAndBodyOpen} ${bodyAttrs.text()} ${indexHtml.bodyOpenTailAndContentBeforeApp}
${html}
<script src="/dist/client.js"></script>
${indexHtml.contentAfterAppAndHtmlClose}`
);
response.end();
});
});
const port = 8181;
// start server
app.listen(port, () => {
console.log(`server started at port ${port}`); // eslint-disable-line
});
我收到一个错误
server started at port 8181
events.js:163
throw er; // Unhandled 'error' event
^
Error: bind EADDRINUSE null:8181
at Object.exports._errnoException (util.js:1050:11)
at exports._exceptionWithHostPort (util.js:1073:20)
at listenOnMasterHandle (net.js:1336:16)
at rr (internal/cluster/child.js:111:12)
at Worker.send (internal/cluster/child.js:78:7)
at process.onInternalMessage (internal/cluster/utils.js:42:8)
at emitTwo (events.js:111:20)
at process.emit (events.js:194:7)
at process.nextTick (internal/child_process.js:766:12)
at _combinedTickCallback (internal/process/next_tick.js:73:7)
events.js:163
throw er; // Unhandled 'error' event
^
任何想法为什么?