Rhino 8, MCP, WebSockets, OAuth, XML and more

New Components

MCP (Model Context Protocol)

• Define Tool Parameter
• Define Tool
• MCP Server
• Deconstruct Tool Call
• MCP Tool Response
• SwiftletBridge executable (stdio-to-HTTP bridge for Claude Desktop and other MCP hosts)

HTTP Server

• Server Input
• Server Response
• Deconstruct Request
• Deconstruct Body

WebSocket

• WebSocket Client
• WebSocket Server
• WebSocket Send

OAuth 2.0

• OAuth Authorize (with PKCE)
• OAuth Token (with refresh support)

UDP

• UDP Listener
• UDP Stream

XML

• Parse XML
• Get XML Attribute Value
• Get XML Attributes
• Get XML Child Nodes
• Get XML Elements By Tag
• Get XML Elements By XPath
• Get XML Inner Text
• Stringify XML Node
• Create XML Element

Large File Handling

• Download File (streaming)
• Upload File (streaming)
• Upload File Multipart (streaming)

Request Building

• Create Form URL Encoded Body
• Create Multipart Field (Text)
• Create Multipart Field (Bytes)
• Create Multipart Form Body

Improvements

• Rhino 8 support (.NET 7)
• Shared HTTP client for better performance
• Bitmap compatibility with Bitmap+ and ShapeDiver
• Null JSON token output by default from the Create JSON Value component
• JToken preview rendering in Grasshopper

Deprecated

• Socket Listener → use WebSocket Client/Server
• Create Multipart Form Body (Named/Unnamed) → use Create Multipart Field + Create Multipart Form Body

QR codes, Bitmaps and Multipart Form Data

New components:

• URLencode
• Hex to RGB
• RGB to Hex
• Byte Array to Bitmap
• Bitmap to Byte Array
• Bitmap to Mesh
• QR code generator
• Throttle (Sleep)
• Deconstruct Headers
• Deconstruct Query Params
• GUID generator
• Base64 encode for byte arrays
• Base64 decode for byte arrays
• Create MultipartForm Body Named
• Create MultipartForm Body Unnamed

Bugfixes:

• Fixed the bug with the Content-Type header not being properly propagated to the request headers
• Fixed the bug with request components not working when multithreading is turned off

Quality of Life improvements

• Added components for constructing / deconstructing URLs (including query params)
• Added utilities for reading CSV strings
• Added components for converting byte arrays to lists of int and vice versa
• Added a Replace Empty Branches component
• Exposed Byte Array param
• Improved error messages

IP Blacklisting

Introduced IP blacklisting functionality that prevents Swiftlet from making calls to IP ranges specified in an optional BLOCKED_SUBNETS environment variable. This is done to make sure that Swiftlet doesn't create a security vulnerability when run in a cloud compute context.

Multithreading and Listeners

• All request components are now multithreaded
• New HTTP Request component that supports all HTTP methods
• New HTTP Listener and Socket Listener components
• Base64 encoding and decoding utilities
• Support for GZIP compression
• Exposed byte arrays as a Grasshopper type
• Improved stability for JSON parsing components

HTML Parsing

• A full set of HTML parsing components
• Create Custom Text Body Param
• Create Byte Array Body Param
• Components for saving plaintext, CSV, and binary files to disk

Open Source, bugfixes

Added examples and documentation for making Swiftlet open-source. Fixed bugs with JSON body creation from JTokens and stringifying JSON Arrays

Construct JSON

Added components for constructing JSON objects

JSON in R7

Adding Newtonsoft.Json dll to the R7 version

Serialization Hotfix

Fixed Text Body component serialization