Can Go\'s Standard Library Handle JSON RPC Server Connections via Simple HTTP POST Requests?

Connecting to a JSON RPC Server using Golang's Standard Library

The question explores the possibility of accessing an HTTP JSON RPC server using Go's standard library tools. While the server setup utilizes the rpc.NewServer() function, the goal is to establish a connection using a simple POST request from a web page or command line.

The default behavior of the HandleHTTP() function expects HTTP clients to issue a CONNECT command and transmit JSON RPC requests directly to the stream. However, this approach is not commonly supported in browsers and requires a more specialized setup.

Solution: Custom HTTP Handler

To overcome this challenge, the solution proposed involves creating a custom HTTP handler that adapts the HTTP request and response into a ServerCodec, making it compatible with the standard library's RPC server. This allows for seamless POST requests to the server.

Test Server Implementation

The provided code demonstrates a test server that employs this custom HTTP handler. The server, implemented using the http.HandlerFunc(), responds to requests at the /bake-me-a-cake endpoint.

The jsonrpc.NewServerCodec() function is used to convert the HTTP connection into a ServerCodec. The server then processes the JSON RPC request and returns the response in JSON format.

Client Interaction

To demonstrate client interaction, a POST request is sent to the server using the http.Post() function. The response is received and the returned JSON is displayed. This verifies the successful connection and data exchange between the client and server.

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