cosmos-sdk/client/rpc/root.go

package rpc

import (
	"fmt"
	"log"
	"net/http"

	"github.com/gorilla/mux"

	"github.com/cosmos/cosmos-sdk/client/context"
	"github.com/cosmos/cosmos-sdk/types/rest"
	"github.com/cosmos/cosmos-sdk/version"
)

// Register REST endpoints
func RegisterRPCRoutes(cliCtx context.CLIContext, r *mux.Router) {
	r.HandleFunc("/version", CLIVersionRequestHandler).Methods("GET")
	r.HandleFunc("/node_version", NodeVersionRequestHandler(cliCtx)).Methods("GET")
	r.HandleFunc("/node_info", NodeInfoRequestHandlerFn(cliCtx)).Methods("GET")
	r.HandleFunc("/syncing", NodeSyncingRequestHandlerFn(cliCtx)).Methods("GET")
	r.HandleFunc("/blocks/latest", LatestBlockRequestHandlerFn(cliCtx)).Methods("GET")
	r.HandleFunc("/blocks/{height}", BlockRequestHandlerFn(cliCtx)).Methods("GET")
	r.HandleFunc("/validatorsets/latest", LatestValidatorSetRequestHandlerFn(cliCtx)).Methods("GET")
	r.HandleFunc("/validatorsets/{height}", ValidatorSetRequestHandlerFn(cliCtx)).Methods("GET")
}

// cli version REST handler endpoint
func CLIVersionRequestHandler(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	if _, err := w.Write([]byte(fmt.Sprintf("{\"version\": \"%s\"}", version.Version))); err != nil {
		log.Printf("could not write response: %v", err)
	}
}

// connected node version REST handler endpoint
func NodeVersionRequestHandler(cliCtx context.CLIContext) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		res, _, err := cliCtx.Query("/app/version")
		if err != nil {
			rest.WriteErrorResponse(w, http.StatusInternalServerError, err.Error())
			return
		}

		w.Header().Set("Content-Type", "application/json")
		if _, err := w.Write(res); err != nil {
			log.Printf("could not write response: %v", err)
		}
	}
}