Recently, I needed to write a simple little script to import a ProFTPd xferlog file into a MySQL database. Not exactly a difficult task, and certainly something that a lot of people have done before.
Not wanting to have to spend ages trying to remember basics around this task, I took to Google, which was a complete washout. It seems to me that Google Search has pretty much become useless, all the results I got were either ads or results about mysql OR proftpd, nothing about how to import the xferlog file into MySQL.
I figured I might as well see if the buzzword of the day, ChatGPT, would handle the question, and the results were a little… shall we say… odd.
Prompt 1: Write a Python script to import a proftpd xferlog file to a mysql database
The reply took quite a while, and I stopped it after the output was in this state:
import re
import mysql.connector
def parse_xferlog(line):
# Regular expression to extract relevant fields from the xferlog entry
pattern = r'^(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\
That pattern
line was still busy growing when I stopped it.
Clearly, ChatGPT was stuck in some sort of loop, so I took a different tack with my next prompt and decided to switch languages: Not using regular expressions, write a PHP script to import a proftpd xferlog file to a mysql table
The output from this prompt was an actual working script, though it would have failed if used as-is because it got the line format for xferlog wrong.
<?php
// Database connection details
$hostname = 'localhost';
$username = 'your_username';
$password = 'your_password';
$database = 'your_database';
// Table name
$tableName = 'xferlog';
// Path to the xferlog file
$xferlogFile = '/path/to/your/xferlog/file.log';
// Connect to MySQL
$connection = mysqli_connect($hostname, $username, $password, $database);
if (!$connection) {
die("Connection failed: " . mysqli_connect_error());
}
// Truncate the table before importing
$query = "TRUNCATE TABLE $tableName";
mysqli_query($connection, $query);
// Open the xferlog file
$file = fopen($xferlogFile, 'r');
if ($file) {
// Prepare the insert statement
$query = "INSERT INTO $tableName (timestamp, duration, remote_host, file_size, command, status, username, service, filename)
VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)";
$stmt = mysqli_prepare($connection, $query);
while (($line = fgets($file)) !== false) {
// Split the line by whitespace
$fields = preg_split('/\s+/', trim($line));
// Extract the relevant fields
$timestamp = $fields[0] . ' ' . $fields[1];
$duration = $fields[2];
$remoteHost = $fields[3];
$fileSize = $fields[4];
$command = $fields[5];
$status = $fields[6];
$username = $fields[7];
$service = $fields[8];
$filename = implode(' ', array_slice($fields, 9));
// Bind the values to the prepared statement
mysqli_stmt_bind_param($stmt, 'sssssssss', $timestamp, $duration, $remoteHost, $fileSize, $command, $status, $username, $service, $filename);
// Execute the statement
mysqli_stmt_execute($stmt);
}
// Close the prepared statement
mysqli_stmt_close($stmt);
// Close the xferlog file
fclose($file);
echo "Import completed successfully.";
} else {
echo "Failed to open the xferlog file.";
}
// Close the database connection
mysqli_close($connection);
?>
This was a good enough starting point at least. I changed the $xferlogfile
value to "php://stdin"
so I could pipe the log file to the script and fixed the parsing of the log line to:
// Extract the relevant fields
$timestamp = $fields[0] . ' ' . $fields[1] . ' ' . $fields[2] . ' ' . $fields[3] . ' ' . $fields[4];
$duration = $fields[5];
$remoteHost = $fields[6];
$fileSize = $fields[7];
$filename = $fields[8];
// ignore 9, 10
$command = 'DOWNLOAD';
if ($fields[11] == 'i') { $command = 'UPLOAD'; }
// ignore 12
$username = $fields[13];
// ignore 14, 15, 16
$status = 'COMPLETE';
if ($fields[17] == 'i') { $status = 'INCOMPLETE'; }
Notice that I completely removed the “service” field from the table, in my use case the service is always sftp anyway. So my query is "INSERT INTO $tableName (timestamp, duration, remote_host, file_size, command, status, username, filename) VALUES (str_to_date(?, '%a %b %d %H:%i:%S %Y'), ?, ?, ?, ?, ?, ?, ?)"
And the parameter binding is mysqli_stmt_bind_param($stmt, 'ssssssss', $timestamp, $duration, $remoteHost, $fileSize, $command, $status, $username, $filename)