Bad PASV Answer

[ldab]

Bad PASV Answer

[ldab]

I didn't write a question, my comment earlier was a suggestion aiming to help you to understand how your server behaves. After knowing how your server behaves, you can work on implementing the solution for it.

If you search for the keyword "Offline" under issues, you will find few other users mentioned different problems and different solutions.

The library is intended to run on a less powerfull CPU then compared to your PC, it also have a lot less resources and features, it is not comparable.

[3Dietrich]

ok, I found 'one' solution:
Before every InitFile or similiar I need to add
ftp.OpenConnection();
Now everything works!
Ok, I need also to change the folder from root to /working folder ftp.ChangeWorkDir("/working folder"); every time.
Strange. But it works!

[hike6688]

Hi Idab,
nice library to save my bme280 logfiles from my esp32 device to my NAS system.
Had the same problem (Bad PASV Answer Connection closed .. ) as 3Dietrich when transfering the second log-file.
Solution is the same as 3Dietrich stated.
I followed the hint from 3Dietrich , now it works.

I keep the current workingDirPath in a static and call openConnectionAndChangeWorkingDir () right before each InitFile() call.

static String mWorkingDirPath = "";

void setWorkingDirPath(String pWorkingDirPath){
  Serial.println("my_ftpHelper::setWorkingDirPath: " + pWorkingDirPath);
  mWorkingDirPath = pWorkingDirPath;
}
String getWorkingDirPath(){
  return mWorkingDirPath;
}
String getBaseWorkingDirPath(){
  String result = "/full_path_of_base_directory_on_ftpserver/" ;
  return result;
}
boolean openConnectionAndChangeWorkingDir (){
  boolean result = false;
  ftp.OpenConnection();
  Serial.println ("my_ftphelper::openConnectionAndChangeWorkingDir-> try to change working dir to: " + mWorkingDirPath);
  ftp.ChangeWorkDir(getWorkingDirPath().c_str());
  if (ftp.isConnected()) {
    Serial.println("CWD set to done : " + mWorkingDirPath);
    result = true;
  } 
  return result;
}```

[ldab]

try to install a FTP Client like FileZilla, enabled the detailed log and inspect how your server behaves.

[3Dietrich]

If this Lib is for using ESP32 as Client, why I should use FileZilla? I used Finder, Cyberduck, NimbleCommander and VSCode (on MacOS) and works ok, no errors using this clients. But I want to use ESP32 this is why I tried the Arduino ESP32_FTPClient and I get no working connection when I use ESP32 with ESP32_FTPClient. At least it outputs some Errors - but this is not detailed enough? I really don't get your question.

[3Dietrich]

in FileZilla I get on PASV this response:

2021-09-08 13:28:48 39435 1 Command: PASV
2021-09-08 13:28:48 39435 1 Response: 227 Entering Passive Mode (192,168,0,1,187,98)

What is bad in this response?

[ldab]

It does not seem to be a bad answer, but in order to replicate the problem I would recommend manual sending all the commands included on the ESP32 log shared earlier.