FTP
The FTP module allows you perform various operations against an FTP or SFTP server.
📁 A comprehensive FTP client module for BoxLang that brings seamless file transfer capabilities to your applications!
This module provides powerful FTP client functionality to the BoxLang language, making it easy to connect to FTP servers, transfer files, and manage remote directories with minimal code.
✨ Features
🌐 FTP/FTPS Support: Connect to standard FTP and secure FTP servers
📁 Complete File Operations: Upload, download, rename, and delete files
📂 Directory Management: Create, remove, list, and navigate directories
🔐 Secure Connections: Support for passive and active modes
🎯 Connection Pooling: Named connections tracked globally via FTPService
🔄 Proxy Support: Connect through proxy servers with custom ports
📊 Flexible Results: Query or array return types for directory listings
⚡ Event-Driven: Interception points for logging, monitoring, and custom logic
🛠️ Production Ready: Built by Ortus Solutions with enterprise-grade quality
🔧 Zero Configuration: Sensible defaults get you started quickly
📦 Installation
Requirements
BoxLang: 1+
Java: JDK 21+
Install via CommandBox CLI
If you are using CommandBox for your web applications, you can install it via CommandBox:
Install via BoxLang Binary
If you want to install it globally for the BoxLang OS binary, use the install-bx-module command:
The module will automatically register and be available as bx:ftp or <bx:ftp> in your BoxLang script and template applications.
From Source
🚀 Quick Start
Here's how to connect to an FTP server and upload a file in just a few lines:
That's it! 🎉 You now have a fully functional FTP client.
💡 Usage Examples
Basic Examples
📁 Connect and List Files
📤 Upload a File
📥 Download a File
Advanced Examples
🔐 Secure Connection with Passive Mode
🌐 Connect Through Proxy Server
📂 Directory Management
📊 List Directory as Array
🔄 Bulk File Transfer
🏷️ Rename Files and Directories
📚 Available Actions
All actions can use a result attribute to store the result of the action in a variable. If not provided, the result will be stored in a variable called bxftp (or cftp if you are in CFML compat mode).
🔌 Connection Actions
open - Connect to FTP Server
open - Connect to FTP ServerOpens a connection to an FTP server and tracks it in the FTPService.
Attributes:
connection
string
✅ Yes
-
Name of the connection to track
server
string
✅ Yes
-
Server IP or hostname
port
numeric
No
21
FTP port number
username
string
✅ Yes
-
Authentication username
password
string
✅ Yes
-
Authentication password
timeout
numeric
No
30
Connection timeout in seconds
secure
boolean
No
false
Use secure FTP (FTPS)
passive
boolean
No
true
Use passive mode
proxyServer
string
No
-
Proxy server (hostname:port)
Examples:
close - Close FTP Connection
close - Close FTP ConnectionCloses an open FTP connection and removes it from the FTPService.
Attributes:
connection
string
✅ Yes
Name of the connection to close
Example:
📂 Directory Actions
changedir - Change Working Directory
changedir - Change Working DirectoryChanges the current working directory on the FTP server.
Attributes:
connection
string
✅ Yes
Connection name
directory
string
✅ Yes
Directory path to change to
Example:
createdir - Create Directory
createdir - Create DirectoryCreates a new directory on the FTP server.
Attributes:
connection
string
✅ Yes
Connection name
new
string
✅ Yes
Path of directory to create
Example:
existsdir - Check Directory Existence
existsdir - Check Directory ExistenceChecks if a directory exists on the FTP server.
Attributes:
connection
string
✅ Yes
Connection name
directory
string
✅ Yes
Directory path to check
Example:
getcurrentdir - Get Working Directory
getcurrentdir - Get Working DirectoryRetrieves the current working directory path.
Attributes:
connection
string
✅ Yes
Connection name
Example:
listdir - List Directory Contents
listdir - List Directory ContentsLists files and directories in the specified directory.
Attributes:
connection
string
✅ Yes
-
Connection name
directory
string
✅ Yes
-
Directory to list
name
string
✅ Yes
-
Variable name to store results
returnType
string
No
"query"
Return format: "query" or "array"
Query Columns:
name- File/directory nameisDirectory- Boolean indicating if item is a directorylastModified- Last modification timestampsize- File size in bytes (aliased aslengthfor CFML compatibility)mode- File permissions modepath- File path without drive designationurl- Complete URL for the itemtype- Type: "file", "directory", "symbolic link", or "unknown"raw- Raw FTP listing representationattributes- File attributesisReadable- Boolean for read permissionisWritable- Boolean for write permissionisExecutable- Boolean for execute permission
Examples:
removedir - Remove Directory
removedir - Remove DirectoryRemoves a directory from the FTP server.
Attributes:
connection
string
✅ Yes
Connection name
directory
string
✅ Yes
Directory path to remove
Example:
renamedir - Rename Directory
renamedir - Rename DirectoryRenames a directory on the FTP server.
Attributes:
connection
string
✅ Yes
Connection name
existing
string
✅ Yes
Current directory path
new
string
✅ Yes
New directory path
Example:
📄 File Actions
existsfile - Check File Existence
existsfile - Check File ExistenceChecks if a file exists on the FTP server.
Attributes:
connection
string
✅ Yes
Connection name
remoteFile
string
✅ Yes
Remote file path to check
Example:
getfile - Download File
getfile - Download FileDownloads a file from the FTP server to the local filesystem.
Attributes:
connection
string
✅ Yes
-
Connection name
remoteFile
string
✅ Yes
-
Remote file path to download
localFile
string
✅ Yes
-
Local file path to save to
failIfExists
boolean
No
true
Fail if local file already exists
Example:
putfile - Upload File
putfile - Upload FileUploads a file from the local filesystem to the FTP server.
Attributes:
connection
string
✅ Yes
Connection name
localFile
string
✅ Yes
Local file path to upload
remoteFile
string
✅ Yes
Remote file path destination
Example:
removefile (or remove) - Delete File
removefile (or remove) - Delete FileDeletes a file from the FTP server.
Attributes:
connection
string
✅ Yes
Connection name
remoteFile
string
✅ Yes
Remote file path to delete
Example:
renamefile - Rename File
renamefile - Rename FileRenames a file on the FTP server.
Attributes:
connection
string
✅ Yes
Connection name
existing
string
✅ Yes
Current file path
new
string
✅ Yes
New file path
Example:
📊 Result Object
All FTP actions return a result object with the following structure:
Common Status Codes
200
Success
Command successful
221
Goodbye
Service closing control connection
226
Transfer complete
Closing data connection, file transfer successful
230
Login successful
User logged in
250
Success
Requested file action okay, completed
550
Failed
File unavailable or permission denied
552
Exceeded
Storage allocation exceeded
553
Not allowed
File name not allowed
Using Result Variables
🎯 Interception Points
The FTP module announces several interception points that allow you to hook into the FTP operation lifecycle for logging, monitoring, metrics, or custom logic.
beforeFTPCall
beforeFTPCallAnnounced before any FTP action is executed.
Interceptor Data:
Use Cases:
Pre-flight validation
Logging all FTP operations
Performance monitoring (start timer)
Security auditing
Example:
afterFTPCall
afterFTPCallAnnounced after an FTP action completes successfully.
Interceptor Data:
Use Cases:
Success logging
Performance metrics (calculate duration)
Notifications or alerts
Analytics and reporting
Example:
onFTPConnectionOpen
onFTPConnectionOpenAnnounced when a new FTP connection is opened.
Interceptor Data:
Use Cases:
Connection logging
Connection pooling metrics
Security monitoring
Access auditing
Example:
onFTPConnectionClose
onFTPConnectionCloseAnnounced when an FTP connection is closed.
Interceptor Data:
Use Cases:
Connection cleanup logging
Session duration tracking
Connection pool management
Resource monitoring
Example:
onFTPError
onFTPErrorAnnounced when an FTP operation encounters an error.
Interceptor Data:
Use Cases:
Error logging and alerting
Retry logic
Fallback mechanisms
Error analytics
Example:
🔗 Connection Management
The FTP module uses the FTPService to manage named connections globally across your application.
Connection Lifecycle
Open: Connection is created and tracked by name
Use: Multiple actions can use the same connection
Close: Connection is removed from tracking
Reusing Connections
Connection Best Practices
✅ Always close connections when done to free resources
✅ Use descriptive names for connections to avoid conflicts
✅ Reuse connections for multiple operations to improve performance
✅ Use try/finally to ensure connections are closed even on errors
❌ Don't leave connections open indefinitely
Accessing Connection Information
After opening a connection, it's stored in a variable with the connection name:
❌ Error Handling
Common Connection Issues
Connection Refused Errors:
Verify FTP server is running and accessible
Check firewall settings for FTP ports (21 for control, 20 for data)
For passive mode, ensure passive port range is accessible
Verify credentials are correct
Passive vs Active Mode:
Passive Mode (default): Client initiates both control and data connections
Active Mode: Server initiates data connection back to client
Use passive mode for connections through firewalls/NAT
Error Handling Patterns
Try/Catch/Finally
Status Code Checking
❓ Troubleshooting
Connection Refused Errors
Problem: FTP operations fail with "Connection refused" errors.
Solutions:
✅ Verify FTP server is running:
nc -v hostname port✅ Check firewall allows FTP ports (21, 20, and passive range)
✅ Ensure passive mode is configured on server (for passive=true)
✅ Verify credentials are correct
✅ Test connection with FTP client (FileZilla, etc.)
Passive Mode Failures
Problem: Connection succeeds but file transfers fail.
Solutions:
✅ Ensure FTP server has passive mode enabled
✅ Check passive port range is open in firewall
✅ Verify server announces correct IP for passive connections
✅ Try active mode instead:
passive="false"
File Upload Failures
Problem: Files fail to upload with permission errors.
Solutions:
✅ Verify user has write permissions on remote directory
✅ Check disk space on FTP server
✅ Ensure remote directory exists
✅ Try uploading to a different directory
Connection Timeout
Problem: Connection attempts timeout.
Solutions:
✅ Increase timeout:
timeout="60"✅ Check network connectivity to FTP server
✅ Verify server is not blocking your IP
✅ Test if server is behind a firewall or proxy
Proxy Connection Issues
Problem: Cannot connect through proxy server.
Solutions:
✅ Verify proxy server address and port:
proxyServer="proxy.company.com:8080"✅ Check proxy supports FTP protocol
✅ Ensure proxy authentication (if required) is configured
✅ Test proxy with other FTP clients
🛠️ Development & Testing
Local Development Setup
This module includes Docker configuration for local FTP server testing:
Test Server Configuration
Host: localhost
Control Port: 2221
Data Port: 2220
Passive Ports: 10000-10010
Username: test_user
Password: testpass
Building from Source
Module Architecture
FTPService: Global singleton service managing all FTP connections
FTP Component: BoxLang component (
@BoxComponent) providing FTP operationsFTPConnection: Represents an active FTP connection with state management
FTPResult: Encapsulates operation results with status codes and messages
Dependencies: Apache Commons Net 3.11.1 for FTP protocol implementation
Testing with Docker
The included Docker setup provides a consistent FTP testing environment:
Important: The vsftpd.conf file includes critical passive mode configuration:
🔄 CFML Compatibility
This module will require the bx-cfml-compat module if you want it to work like Adobe ColdFusion/Lucee in your CFML applications.
Differences from CFML
Result Variable: BoxLang uses
bxftpby default, CFML compat mode usescftpComponent Name: Use
bx:ftpin BoxLang,cftpwith compat moduleFeatures: BoxLang FTP includes modern features like event interception
Migration from CFML
All CFML <cfftp> should work with no changes when using bx-cfml-compat. However, for native BoxLang usage, update tags as follows:
🤝 Contributing
We ❤️ contributions! This project is open source and welcomes your help to make it even better.
🐛 Found a Bug?
If you discover a bug, please:
Check existing issues at GitHub Issues
Create a new issue with:
Clear title and description
Steps to reproduce
Expected vs actual behavior
BoxLang version and environment details
Sample code that demonstrates the issue
💡 Have an Enhancement Idea?
We'd love to hear your ideas! Please:
Open a Feature Request
Describe the feature and its use case
Explain how it would benefit users
📚 Improve Documentation
Documentation improvements are always welcome:
Fix typos or unclear explanations
Add more examples
Improve code comments
Create tutorials or guides
💰 Financial Support
You can support BoxLang and all Ortus Solutions open source projects:
Patrons get exclusive benefits like:
Priority support
Early access to new features
FORGEBOX Pro account
CFCasts account
📞 Support Channels
Need help? Don't create an issue—use our support channels:
🏆 Contributors
Thank you to all our amazing contributors! ❤️
Made with contributors-img
🔐 Security Vulnerabilities
If you discover a security vulnerability:
DO NOT create a public issue
Email [email protected]
Report in
#securitychannel on Box Team Slack
All vulnerabilities will be promptly addressed.
📄 License
This project is licensed under the Apache License 2.0.
See LICENSE file for full details.
💼 Support & Resources
📖 Documentation
Module Docs: You're reading them! 📚
BoxLang Docs: https://boxlang.ortusbooks.com/
Apache Commons Net: https://commons.apache.org/proper/commons-net/
🌐 Links
BoxLang Website: https://boxlang.io
Ortus Solutions: https://www.ortussolutions.com
GitHub Repository: https://github.com/ortus-boxlang/bx-ftp
Issue Tracker: https://github.com/ortus-boxlang/bx-ftp/issues
ForgeBox: https://forgebox.io/view/bx-ftp
🎓 Learning Resources
BoxLang Training: https://www.ortussolutions.com/services/training
CFCasts: https://www.cfcasts.com
THE DAILY BREAD
"I am the way, and the truth, and the life; no one comes to the Father, but by me (JESUS)" Jn 14:1-12
Copyright Since 2025 by Ortus Solutions, Corp www.boxlang.io | www.ortussolutions.com
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