我正在尝试在调用“ requst.on('close'”时终止子进程。但是此回调中的child.pid始终指向最新请求。问题是:如何将child.pid与请求匹配? 谢谢
var query_script = "query.py"
var express = require('express');
var app = express();
var spawn = require('child_process').spawn;
app.get('/:version/query', function(request, response) {
child = spawn('python, ['query.py', request.originalUrl])
console.log("start pid=" + child.pid + ": " + request.originalUrl)
request.on('close', function () {
console.log("1: current pid=" + child.pid)
//child.kill('SIGTERM');
})
child.stdout.pipe(response)
});
app.listen(3000);
console.log('Listening on port 3000...');
最佳答案
通过在闭包前面放置child
来定义var
。
var child = spawn('python, ['query.py', request.originalUrl])