javascript - 在 Cloud Foundry Node.js 上运行子进程

Question

有人尝试过在 Cloud Foundry 的 node.js 上运行子进程吗？

我有以下代码在本地运行良好:

var port = (process.env.VMC_APP_PORT || 3000),
    host = (process.env.VCAP_APP_HOST || 'localhost'),
    http = require('http');


 var childProcess = require('child_process'),
         phantom = require('phantomjs'),
     ls;

 http.createServer(function(req, res) {

    ls = childProcess.exec('phantomjs -h', function (error, stdout, stderr) {
    if (error) {
     console.log(error.stack);
     console.log('Error code: '+error.code);
     console.log('Signal received: '+error.signal);
    }
    console.log('Child Process STDOUT: '+stdout);
    console.log('Child Process STDERR: '+stderr);
    });

    ls.on('exit', function (code) {
        console.log('Child process exited with exit code '+code);
      res.writeHead(200, {'Content-Type': 'text/plain'});
      res.write('Working...');
      res.end();
    });

 }).listen(port, host);

但是cloudfoundry.com上的vmc推送，它在vmc日志中给了我错误

Reading logs/stdout.log... OK
Child process exited with exit code 127
Error: Command failed: /bin/sh: phantomjs: not found

    at ChildProcess.exithandler (child_process.js:536:15)
    at ChildProcess.EventEmitter.emit (events.js:91:17)
    at maybeClose (child_process.js:634:16)
    at Socket.ChildProcess.spawn.stdin (child_process.js:805:11)
    at Socket.EventEmitter.emit (events.js:88:17)
    at Socket._destroy.destroyed (net.js:358:10)
    at process.startup.processNextTick.process._tickCallback (node.js:244:9)
Error code: 127
Signal received: null
Child Process STDOUT:
Child Process STDERR: /bin/sh: phantomjs: not found

Child process exited with exit code 127
Error: Command failed: /bin/sh: phantomjs: not found

    at ChildProcess.exithandler (child_process.js:536:15)
    at ChildProcess.EventEmitter.emit (events.js:91:17)
    at maybeClose (child_process.js:634:16)
    at Socket.ChildProcess.spawn.stdin (child_process.js:805:11)
    at Socket.EventEmitter.emit (events.js:88:17)
    at Socket._destroy.destroyed (net.js:358:10)
    at process.startup.processNextTick.process._tickCallback (node.js:244:9)
Error code: 127
Signal received: null
Child Process STDOUT:
Child Process STDERR: /bin/sh: phantomjs: not found

然后我还在下面添加了 package.json 文件，但仍然出现相同的错误:

{
  "name" : "mytestchildprocesses",
  "version" : "0.1.0",
  "dependencies" : {
    "phantomjs" : "1.8.1-3",
    "child_process" : "0.x.x",
    "http" : "0.0.0"
  }
}

或者，我尝试了其他人将 phantomjs 放在 node.js 上:https://github.com/sgentle/phantomjs-node 。但这个选项甚至在我的本地计算机上不起作用(无法在 Windows 中调用 phantomjs.cmd)。

如果你们能帮忙的话，我宁愿弄清楚如何在 cloudfoundry.com 中执行子进程。

非常感谢!!

Answer 1

看起来 Phantom.js 需要一个名为“phamtom”的二进制文件。我建议看一下 Node 纤维包 - https://github.com/laverdet/node-fibers 。该库不依赖于任何 native 二进制文件，应该可以正常工作。