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86 lines
2.7 KiB
86 lines
2.7 KiB
// HTTP RPC server supporting calls via uri params, jsonrpc over HTTP, and jsonrpc over
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// websockets
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//
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// Client Requests
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//
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// Suppose we want to expose the rpc function `HelloWorld(name string, num int)`.
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//
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// GET (URI)
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//
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// As a GET request, it would have URI encoded parameters, and look like:
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//
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// curl 'http://localhost:8008/hello_world?name="my_world"&num=5'
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//
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// Note the `'` around the url, which is just so bash doesn't ignore the quotes in `"my_world"`.
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// This should also work:
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//
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// curl http://localhost:8008/hello_world?name=\"my_world\"&num=5
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//
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// A GET request to `/` returns a list of available endpoints.
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// For those which take arguments, the arguments will be listed in order, with `_` where the actual value should be.
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//
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// POST (JSONRPC)
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//
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// As a POST request, we use JSONRPC. For instance, the same request would have this as the body:
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//
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// {
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// "jsonrpc": "2.0",
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// "id": "anything",
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// "method": "hello_world",
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// "params": {
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// "name": "my_world",
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// "num": 5
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// }
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// }
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//
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// With the above saved in file `data.json`, we can make the request with
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//
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// curl --data @data.json http://localhost:8008
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//
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//
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// WebSocket (JSONRPC)
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//
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// All requests are exposed over websocket in the same form as the POST JSONRPC.
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// Websocket connections are available at their own endpoint, typically `/websocket`,
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// though this is configurable when starting the server.
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//
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// Server Definition
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//
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// Define some types and routes:
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//
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// type ResultStatus struct {
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// Value string
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// }
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//
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// Define some routes
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//
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// var Routes = map[string]*rpcserver.RPCFunc{
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// "status": rpcserver.NewRPCFunc(Status, "arg"),
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// }
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//
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// An rpc function:
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//
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// func Status(v string) (*ResultStatus, error) {
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// return &ResultStatus{v}, nil
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// }
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//
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// Now start the server:
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//
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// mux := http.NewServeMux()
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// rpcserver.RegisterRPCFuncs(mux, Routes)
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// wm := rpcserver.NewWebsocketManager(Routes)
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// mux.HandleFunc("/websocket", wm.WebsocketHandler)
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// logger := log.NewTMLogger(log.NewSyncWriter(os.Stdout))
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// listener, err := rpc.Listen("0.0.0.0:8080", rpcserver.Config{})
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// if err != nil { panic(err) }
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// go rpcserver.StartHTTPServer(listener, mux, logger)
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//
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// Note that unix sockets are supported as well (eg. `/path/to/socket` instead of `0.0.0.0:8008`)
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// Now see all available endpoints by sending a GET request to `0.0.0.0:8008`.
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// Each route is available as a GET request, as a JSONRPCv2 POST request, and via JSONRPCv2 over websockets.
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//
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// Examples
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//
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// - [Tendermint](https://github.com/tendermint/tendermint/blob/master/rpc/core/routes.go)
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// - [tm-monitor](https://github.com/tendermint/tendermint/blob/master/tools/tm-monitor/rpc.go)
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package rpc
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