setKeystoreFile for a resource file in class path

[maruixiang]

org.apache.ftpserver.ssl.SslConfigurationFactory#loadStore support file or resource.

but org.apache.ftpserver.ssl.SslConfigurationFactory#setKeystoreFile only support file , it will check file length:

public void setKeystoreFile(File keyStoreFile) {
       if (keyStoreFile != null && keyStoreFile.length() != 0L) {
           this.keystoreFile = keyStoreFile;
       } else {
           throw new FtpServerConfigurationException("KeystoreFile must not be null or zero length");
       }
   }

resolve this is to remove the check ：

 public void setKeystoreFile(File keyStoreFile) {
        
            this.keystoreFile = keyStoreFile;
      
    }

[elecharny]

It's a bit more complicated. If you never call {{setKeystoreFile}}, the {{keystoreFile}} class variable is set to {{./res/.keystore}}, its default value. If it does not exist, then the {{loadStore}} method will try to load it from the classpath.

AFAICT, sounds good to me.