在 NodeJS 中模拟发出的“套接字挂断”

Question

I would like to simulate an emitted "Socket hang up error" by implementing a simple faulty server request/response scenario.

Here is a simple faulty server scenario using the native http module. The makeRequest function emits the Socket hang up error.

var server = http.createServer((req, res) => {
  console.log('got request');
  res.write('efgh')
  res.end();
});

server.listen(8080, function() {
  makeRequest(() => {
    server.close();
  });
});

function makeRequest(cb) {
  var req = http.request('http://localhost:8080', function(res) {
    console.log('got response')
    res.resume();
    cb();
  })
  req.write('abcd');
}

Any suggestions on how to simulate emitting this error and so I can handle it in the request module pattern below? The ultimate test is running the code block below and verifying that by catching the emitted Socket hang up error, the pipe commands will not execute and fail:

request('https://localhost:8080/doodles.zip')
    .on('error', function(error){ 
        console.log('error requesting base zip file '); 
        console.log(error);
    })
    .on('data', function(chunk){
        console.log('A new chunk: ', chunk);
    })
    .on('end', function(){
        // console.log(output);
        console.log('End GET Request');    
    })    
    .pipe(fs.createWriteStream('doodles.txt'))
        .on('error',function(error){

            console.log('error streaming base zip file');
            console.log(error);

        })
        .on('close',function(){
            console.log('on close of zip pipe to txt');
        });

Answer 1

From the docs: https://github.com/nodejs/node-v0.x-archive/blob/ba048e72b02e17f0c73e0dcb7d37e76a03327c5a/lib/_http_client.js#L164 I Hope this is what you meant. Good Luck

function createHangUpError() {
  var error = new Error('socket hang up');
  error.code = 'ECONNRESET';
  return error;
}