/
main.go
95 lines (75 loc) · 2.28 KB
/
main.go
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// SPDX-License-Identifier: ISC
// Copyright (c) 2014-2020 Bitmark Inc.
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.
package main
import (
"crypto/tls"
"encoding/json"
"fmt"
"net/rpc"
"net/rpc/jsonrpc"
"github.com/bitmark-inc/exitwithstatus"
"github.com/bitmark-inc/getoptions"
)
// RPCEmptyArguments - null parameters for RPC call
type RPCEmptyArguments struct{}
// RPCClient - client connection for RPC calls
type RPCClient struct {
Client *rpc.Client
}
// GetNodeInfo - returns the node info of a node from bitmark rpc
func (r *RPCClient) GetNodeInfo() (json.RawMessage, error) {
args := RPCEmptyArguments{}
var reply json.RawMessage
err := r.Client.Call("Node.Info", &args, &reply)
return reply, err
}
// set by the linker: go build -ldflags "-X main.version=M.N" ./...
var version = "zero" // do not change this value
// main program
func main() {
defer exitwithstatus.Handler()
flags := []getoptions.Option{
{Long: "help", HasArg: getoptions.NO_ARGUMENT, Short: 'h'},
// {Long: "verbose", HasArg: getoptions.NO_ARGUMENT, Short: 'v'},
// {Long: "quiet", HasArg: getoptions.NO_ARGUMENT, Short: 'q'},
{Long: "version", HasArg: getoptions.NO_ARGUMENT, Short: 'V'},
}
program, options, arguments, err := getoptions.GetOS(flags)
if err != nil {
exitwithstatus.Message("option parse error: %s", err)
}
if len(options["version"]) > 0 {
exitwithstatus.Message("%s: version: %s", program, version)
}
if len(options["help"]) > 0 || len(arguments) == 0 {
exitwithstatus.Message("usage: %s [--help] host:port", program)
}
if len(arguments) != 1 {
exitwithstatus.Message("%s: extraneous extra arguments", program)
}
hostPort := arguments[0]
// establish rpc connection over tls
conn, err := tls.Dial("tcp", hostPort, &tls.Config{
InsecureSkipVerify: true,
})
if err != nil {
exitwithstatus.Message("dial error: %s", err)
}
defer conn.Close()
client := jsonrpc.NewClient(conn)
r := RPCClient{client}
reply := map[string]interface{}{
"host": fmt.Sprintf("tcp://%s", hostPort),
}
reply["info"], err = r.GetNodeInfo()
if err != nil {
exitwithstatus.Message("rpc error: %s", err)
}
b, err := json.Marshal(reply)
if err != nil {
exitwithstatus.Message("incorrect json marshal: %s", err)
}
fmt.Printf("%s", b)
}