问Loopback:如何停止控制台命令？
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Stack Overflow用户

提问于 2018-10-30 13:14:58

回答 1查看 251关注 0票数 0

我正在通过命令行运行loopback命令。

脚本如下：

const app = require('../../server/server');

let acquireToken = function() {
    app.stop();
};

acquireToken();

但是，这似乎不起作用，因为stop()不是一个函数。因此，我在server.js文件中添加了以下内容：

'use strict';

let loopback = require('loopback');
let boot = require('loopback-boot');
let app = module.exports = loopback();

let winston = require('./winston');

app.start = function() {
  // start the web server
  return app.listen(function() {
    app.emit('started');
    let baseUrl = app.get('url').replace(/\/$/, '');
    winston.info('Web server listening at: %s', baseUrl);
    if (app.get('loopback-component-explorer')) {
      let explorerPath = app.get('loopback-component-explorer').mountPath;
      winston.info('Browse your REST API at %s%s', baseUrl, explorerPath);
    }
  });
};

let server;
app.stop = () => {
  server.close();
}

// Bootstrap the application, configure models, datasources and middleware.
// Sub-apps like REST API are mounted via boot scripts.
boot(app, __dirname, function(err) {
  if (err) throw err;

  // start the server if `$ node server.js`
  if (require.main === module)
    server = app.start();
});

module.exports = app;

但是require.main ==模块阻止了它的工作，因为它提供了以下内容：

TypeError: Cannot read property 'close' of undefined

推荐的工作方式是什么？

loopbackjs

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回答 1

Stack Overflow用户

发布于 2018-10-30 17:05:40

您的问题有点误导人，因为您试图停止从require调用返回的express对象，所以更准确的问题是

如何从另一个脚本启动和停止侦听环回应用程序？

在server.js中，将app.start = function()更改为app.start = function(cb)，并在末尾添加if (cb) {cb()};。

'use strict';

let loopback = require('loopback');
let boot = require('loopback-boot');
let app = module.exports = loopback();

let winston = require('./winston');

app.start = function(cb) {
  // start the web server
  return app.listen(function() {
    app.emit('started');
    let baseUrl = app.get('url').replace(/\/$/, '');
    winston.info('Web server listening at: %s', baseUrl);
    if (app.get('loopback-component-explorer')) {
      let explorerPath = app.get('loopback-component-explorer').mountPath;
      winston.info('Browse your REST API at %s%s', baseUrl, explorerPath);
    }
    if (cb) cb();
  });
};

let server;
app.stop = () => {
  server.close();
}

// Bootstrap the application, configure models, datasources and middleware.
// Sub-apps like REST API are mounted via boot scripts.
boot(app, __dirname, function(err) {
  if (err) throw err;

  // start the server if `$ node server.js`
  if (require.main === module)
    server = app.start();
});

module.exports = app;

对于启动和停止回环的文件

// Setup loopback, but don't start the server
const app = require('./server');

// Define our callback function
let acquireToken = function() {   
    app.server.close();  
    console.log('closed'); 
};

// Hold onto the listener object so we can stop it later and start the server with the callback which executes after startup.
app.server = app.start(acquireToken);