Shell_ftp

file transfer protocol via WWW

 $ ftpget ftp:// < server_name >/ < path >/ <file_name>.tar.gz

• Application

  to upload or download files via WWW.

  • 1. Request Target URL with Page to be downloaded
  • 2. Text Message with Image
  • 3. Mail Send/ Received with Mail_Body

• Script

      #!/bin/bash
      # ftpget-- to get file in anoynymous way.
  
      anonpass="$logname@$(hostname)"
  
      if [ $# -ne 1 ]; then   # (a)
          echo"execution way is : $0 ftp://..." >&2
          exit 1
      fi
  
      if [ "$( echo $1 | cut -c1-6)" != "ftp://"]; then
          echo"$0: plz to start url string with ftp://." >&2
          exit 1
      fi
  
      server='$( echo $1 | cut -d / -f3)' # (b)
      filename='$( echo $1 | cut -d/ -f4-)'
      basefile='$( basename $filename )'
  
      ftp -np << EOF
      open $server
      user ftp $anonpass
      get "$filename" "$basefile"
      quit
      EOF
  
      if [ $? -ne 0 ]; then
          ls -l $basefile  # (c)
      fi
  
      exit 0
  

• Syntax

  • (a) $0, $#, $n, $?

    https://github.com/QueenieCplusplus/Shell_echo#common-variable

  • (b) cut -d/ -f3

      This will take the input, split the string by the '/' delimiter and take the third field. 
    
     cut -d "=" -f2
      
     This will take the input, split the string by the '=' delimiter and take the second field. If var contains a=b=c then this command will return 'b'.
    
     cut -d "|" -f1
     
     This is similar as the previous command, but will split using '|' as a delimiter and will take the first field.
    

  • (c) ls -l

    (to be wait for check...)

• Execution

  plz change the scripts filename to be ftpget instead of 520b. then type in bash:

    ftpget ftp://...
  

(to be continued...)