Node-FTP duplicating operations upon uploading a file

As there are things called 'callback hell'. It was the only way I can get a file from a server to my vps pc, and upload it. The process was simple:

1. Download a .json file from the ftp server
2. Edit the .json file on the pc
3. Upload the .json file and delete the pc's copy.

However my problem was this: Although it downloads once, it returns the upload based on how many times I command it during 1 session (command #1, does it once, command#2, does it twice, etc).

I tried to run it as imperative, but gets nullified. Had to resort to callback hell to run the code almost properly. The trigger works to initialize the command, but the command and session goof'd.

((  //declaring my variables as parameters      ftp=new (require('ftp'))(),      fs=require('fs'),      serverFolder='./Path/Of/Server/',      localFolder='./Path/Of/Local/',      file='some.json',      {log}=console  )=>{      //run server if its ready      ftp.on('ready',()=>{           //collect a list of files from the server folder         ftp.list(serverFolder+file,(errList,list)=>             errList|| typeof list === 'object' &&             list.forEach($file=>                  //if the individual file matches, resume to download the file                $file.name===file&&(                   ftp.get(serverFolder+file,(errGet,stream)=>                       errGet||(                          log('files matched!  cdarry onto the operation...'),                          stream.pipe(fs.createReadStream(localFolder+file)),                          stream.once('close',()=>{                                //check if the file has a proper size                              fs.stat(localFolder+file,(errStat,stat)=>                                  errStat || stat.size === 0                                    //will destroy server connection if bytes = 0                                  ?(ftp.destroy(),log('the file has no value'))                                    //uploads if the file has a size, edits, and ships                                  :(editThisFile(),                                      ftp.put(                                         fs.createReadStream(localFolder+file),                                         serverFolder+file,err=>err||(                                            ftp.end(),log('process is complete!')                                   ))                                  //editThisFile() is a place-holder editor                                  //edits by path, and object                                                                  )                          })                      )                   )                )             )         );      });      ftp.connect({         host:'localHost',         password:'1Forrest1!',         port:'21',         keepalive:0,         debug: console.log.bind(console)      });  })()  

The main problem is: it'll return a copy of the command over and over as 'carry over' for some reason.

https://stackoverflow.com/questions/66467144/node-ftp-duplicating-operations-upon-uploading-a-file March 04, 2021 at 09:06AM