bergmannjg/railway-info-fsharp

F# clients for railway trip information

F# clients for JSON-RPC server

F# clients for the node server apps

• hafas-jsonrpc-server.
• railwayroute-jsonrpc-server.

The node server app is started from the client library.

F# client and node server can run on Linux and Windows.

Use cases

Example use cases for the client library:

• with F# Interactive in this script
• in a Jupyter Notebook app with this document using the new .net-fsharp kernel.

Configuration of node server app

The server is configured via the following options

type ClientOptions =
    {
      /// path to node executable, default is "/usr/bin/node"
      node: string
      /// path of scriptfile, default is "../hafas-jsonrpc-server/build/index.js"
      script: string
      /// show transfer messages, default is false
      verbose: bool }

(De)Serialization of F# types

The (de)serialization of F# types from/to JsonRpc messages is done with the following steps:

• byte -> string
  • uses LowLevel and Client from FsAutoComplete
• string -> F# type
  • uses FSharp.SystemTextJson and converters for erased union types.

F# type defintions from TypeScript declaration file

The types are generated from

• the TypeScript declaration file hafas-client
• the TypeScript file railway-routes-types

with the following steps (see restore.sh):

• F# interface types with ts2fable
• F# interface types to record types with transformer.