mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-11-25 13:47:19 +00:00
Added the start of RPC + removed proxy functions.
* Set the listener of the server when opened. * refactor server RPC. * deleted proxy functions + moved TCPPeer to tcp file * implemented the start of JSON-RPC * changed string port args to int * added peerCount. * Start a server with startOpts * Updated README
This commit is contained in:
Anthony De Meulemeester
GitHub
parent
0eeb15f62d
commit
83306a5c96
7 changed files with 341 additions and 220 deletions
16
README.md
16
README.md
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@ -34,9 +34,9 @@ The project will exist out of the following topics/packages:
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1. network (started)
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2. core (started)
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3. vm (open)
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4. smartcontract (open)
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5. api (RPC server) (open)
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3. api (JSON-RPC server) (started)
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4. vm (open)
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5. smartcontract (open)
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# Getting started
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### Server
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@ -53,8 +53,16 @@ You can add multiple seeds if you want:
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`neoserver -seed 127.0.0.1:20333,127.0.01:20334`
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By default the server will currently run on port 3000, for testing purposes. You can change that by setting the tcp flag:
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`neoserver -seed 127.0.0.1:20333 -tcp 1337`
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### RPC
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To be implemented..
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If you want your node to also serve JSON-RPC, you can do that by setting the following flag:
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`neoserver -rpc 4000`
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In this case server will accept and respond JSON-RPC on port 4000. Keep in mind that currently there is only a small subset of the JSON-RPC implemented. Feel free to make a PR with more functionality.
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### vm
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To be implemented..
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@ -8,25 +8,36 @@ import (
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)
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var (
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port = flag.String("port", ":3000", "port the TCP listener will listen on.")
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tcp = flag.Int("tcp", 3000, "port TCP listener will listen on.")
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seed = flag.String("seed", "", "initial seed servers.")
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net = flag.Int("net", 56753, "the mode the server will operate in.")
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rpc = flag.Int("rpc", 0, "let this server also respond to rpc calls on this port")
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)
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// Simple dirty and quick bootstrapping for the sake of development.
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// e.g run 2 nodes:
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// neoserver -port :4000
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// neoserver -port :3000 -seed 127.0.0.1:4000
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// neoserver -tcp :4000
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// neoserver -tcp :3000 -seed 127.0.0.1:4000
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func main() {
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flag.Parse()
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opts := network.StartOpts{
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Seeds: parseSeeds(*seed),
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TCP: *tcp,
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RPC: *rpc,
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}
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s := network.NewServer(network.NetMode(*net))
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seeds := strings.Split(*seed, ",")
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if len(seeds) == 0 {
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seeds = []string{*seed}
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}
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if *seed == "" {
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seeds = []string{}
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}
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s.Start(*port, seeds)
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s.Start(opts)
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}
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func parseSeeds(s string) []string {
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if len(s) == 0 {
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return nil
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}
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seeds := strings.Split(s, ",")
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if len(seeds) == 0 {
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return nil
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}
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return seeds
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}
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@ -1,8 +1,6 @@
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package network
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import (
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"net"
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"github.com/anthdm/neo-go/pkg/util"
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)
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@ -44,81 +42,3 @@ func (p *LocalPeer) id() uint32 { return p.nonce }
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func (p *LocalPeer) verack() bool { return p.isVerack }
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func (p *LocalPeer) addr() util.Endpoint { return p.endpoint }
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func (p *LocalPeer) disconnect() {}
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// TCPPeer represents a remote node, backed by TCP transport.
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type TCPPeer struct {
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s *Server
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// nonce (id) of the peer.
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nonce uint32
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// underlying TCP connection
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conn net.Conn
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// host and port information about this peer.
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endpoint util.Endpoint
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// channel to coordinate messages writen back to the connection.
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send chan *Message
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// whether this peers version was acknowledged.
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isVerack bool
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}
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// NewTCPPeer returns a pointer to a TCP Peer.
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func NewTCPPeer(conn net.Conn, s *Server) *TCPPeer {
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e, _ := util.EndpointFromString(conn.RemoteAddr().String())
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return &TCPPeer{
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conn: conn,
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send: make(chan *Message),
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endpoint: e,
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s: s,
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}
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}
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func (p *TCPPeer) callVersion(msg *Message) {
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p.send <- msg
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}
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// id implements the peer interface
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func (p *TCPPeer) id() uint32 {
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return p.nonce
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}
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// endpoint implements the peer interface
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func (p *TCPPeer) addr() util.Endpoint {
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return p.endpoint
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}
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// verack implements the peer interface
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func (p *TCPPeer) verack() bool {
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return p.isVerack
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}
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// callGetaddr will send the "getaddr" command to the remote.
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func (p *TCPPeer) callGetaddr(msg *Message) {
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p.send <- msg
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}
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func (p *TCPPeer) disconnect() {
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close(p.send)
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p.conn.Close()
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}
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// writeLoop writes messages to the underlying TCP connection.
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// A goroutine writeLoop is started for each connection.
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// There should be at most one writer to a connection executing
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// all writes from this goroutine.
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func (p *TCPPeer) writeLoop() {
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// clean up the connection.
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defer func() {
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p.conn.Close()
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}()
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for {
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msg := <-p.send
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p.s.logger.Printf("OUT :: %s :: %+v", msg.commandType(), msg.Payload)
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// should we disconnect here?
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if err := msg.encode(p.conn); err != nil {
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p.s.logger.Printf("encode error: %s", err)
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}
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}
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}
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129
pkg/network/rpc.go
Normal file
129
pkg/network/rpc.go
Normal file
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@ -0,0 +1,129 @@
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package network
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import (
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"encoding/json"
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"fmt"
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"net/http"
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)
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const (
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rpcPortMainNet = 20332
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rpcPortTestNet = 10332
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rpcVersion = "2.0"
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// error response messages
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methodNotFound = "Method not found"
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parseError = "Parse error"
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)
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// Each NEO node has a set of optional APIs for accessing blockchain
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// data and making things easier for development of blockchain apps.
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// APIs are provided via JSON-RPC , comm at bottom layer is with http/https protocol.
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// listenHTTP creates an ingress bridge from the outside world to the passed
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// server, by installing handlers for all the necessary RPCs to the passed mux.
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func listenHTTP(s *Server, port int) {
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api := &API{s}
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p := fmt.Sprintf(":%d", port)
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s.logger.Printf("serving RPC on %d", port)
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s.logger.Printf("%s", http.ListenAndServe(p, api))
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}
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// API serves JSON-RPC.
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type API struct {
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s *Server
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}
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func (s *API) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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// Official nodes respond a parse error if the method is not POST.
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// Instead of returning a decent response for this, let's do the same.
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if r.Method != "POST" {
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writeError(w, 0, 0, parseError)
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}
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var req Request
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if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
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writeError(w, 0, 0, parseError)
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return
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}
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defer r.Body.Close()
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if req.Version != rpcVersion {
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writeJSON(w, http.StatusBadRequest, nil)
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return
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}
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switch req.Method {
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case "getconnectioncount":
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if err := s.getConnectionCount(w, &req); err != nil {
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writeError(w, 0, 0, parseError)
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return
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}
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case "getblockcount":
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case "getbestblockhash":
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default:
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writeError(w, 0, 0, methodNotFound)
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}
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}
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// This is an Example on how we could handle incomming RPC requests.
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func (s *API) getConnectionCount(w http.ResponseWriter, req *Request) error {
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count := s.s.peerCount()
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resp := ConnectionCountResponse{
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Version: rpcVersion,
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Result: count,
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ID: 1,
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}
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return writeJSON(w, http.StatusOK, resp)
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}
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// writeError returns a JSON error with given parameters. All error HTTP
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// status codes are 200. According to the official API.
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func writeError(w http.ResponseWriter, id, code int, msg string) error {
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resp := RequestError{
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Version: rpcVersion,
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ID: id,
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Error: Error{
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Code: code,
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Message: msg,
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},
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}
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return writeJSON(w, http.StatusOK, resp)
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}
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func writeJSON(w http.ResponseWriter, status int, v interface{}) error {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(status)
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return json.NewEncoder(w).Encode(v)
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}
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// Request is an object received through JSON-RPC from the client.
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type Request struct {
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Version string `json:"jsonrpc"`
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Method string `json:"method"`
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Params []string `json:"params"`
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ID int `json:"id"`
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}
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// ConnectionCountResponse ..
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type ConnectionCountResponse struct {
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Version string `json:"jsonrpc"`
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Result int `json:"result"`
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ID int `json:"id"`
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}
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// RequestError ..
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type RequestError struct {
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Version string `json:"jsonrpc"`
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ID int `json:"id"`
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Error Error `json:"error"`
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}
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// Error holds information about an RCP error.
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type Error struct {
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Code int `json:"code"`
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Message string `json:"message"`
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}
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@ -5,7 +5,6 @@ import (
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"log"
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"net"
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"os"
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"strconv"
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"time"
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"github.com/anthdm/neo-go/pkg/network/payload"
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@ -53,12 +52,8 @@ type Server struct {
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relay bool
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// TCP listener of the server
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listener net.Listener
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// RPC channels
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versionCh chan versionTuple
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getaddrCh chan getaddrTuple
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invCh chan invTuple
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addrCh chan addrTuple
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// channel for safely responding the number of current connected peers.
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peerCountCh chan peerCount
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}
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// NewServer returns a pointer to a new server.
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@ -80,22 +75,16 @@ func NewServer(net NetMode) *Server {
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relay: true, // currently relay is not handled.
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net: net,
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quit: make(chan struct{}),
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versionCh: make(chan versionTuple),
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getaddrCh: make(chan getaddrTuple),
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invCh: make(chan invTuple),
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addrCh: make(chan addrTuple),
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peerCountCh: make(chan peerCount),
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}
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return s
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}
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// Start run's the server.
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func (s *Server) Start(port string, seeds []string) {
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p, err := strconv.Atoi(port[1:len(port)])
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if err != nil {
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s.logger.Fatalf("could not convert port to integer: %s", err)
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}
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s.port = uint16(p)
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// TODO: server should be initialized with a config.
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func (s *Server) Start(opts StartOpts) {
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s.port = uint16(opts.TCP)
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fmt.Println(logo())
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fmt.Println(string(s.userAgent))
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@ -103,10 +92,14 @@ func (s *Server) Start(port string, seeds []string) {
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s.logger.Printf("NET: %s - TCP: %d - RELAY: %v - ID: %d",
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s.net, int(s.port), s.relay, s.id)
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go listenTCP(s, port)
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go listenTCP(s, opts.TCP)
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if len(seeds) > 0 {
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connectToSeeds(s, seeds)
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if opts.RPC > 0 {
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go listenHTTP(s, opts.RPC)
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}
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if len(opts.Seeds) > 0 {
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connectToSeeds(s, opts.Seeds)
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}
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s.loop()
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@ -147,44 +140,8 @@ func (s *Server) loop() {
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s.logger.Printf("peer %s disconnected", peer.addr())
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}
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// Process the received version and respond with a verack.
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case t := <-s.versionCh:
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if s.id == t.request.Nonce {
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t.peer.disconnect()
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}
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if t.peer.addr().Port != t.request.Port {
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t.peer.disconnect()
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}
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t.response <- newMessage(ModeDevNet, cmdVerack, nil)
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// Process the getaddr cmd.
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case t := <-s.getaddrCh:
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t.response <- &Message{} // just for now.
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// Process the addr cmd. Register peer will handle the maxPeers connected.
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case t := <-s.addrCh:
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for _, addr := range t.request.Addrs {
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if !s.peerAlreadyConnected(addr.Addr) {
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// TODO: this is not transport abstracted.
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go connectToRemoteNode(s, addr.Addr.String())
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}
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}
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t.response <- true
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// Process inventories cmd.
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case t := <-s.invCh:
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if !t.request.Type.Valid() {
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t.peer.disconnect()
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break
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}
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if len(t.request.Hashes) == 0 {
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t.peer.disconnect()
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break
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}
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payload := payload.NewInventory(t.request.Type, t.request.Hashes)
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msg := newMessage(s.net, cmdGetData, payload)
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t.response <- msg
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case t := <-s.peerCountCh:
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t.count <- len(s.peers)
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case <-s.quit:
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s.shutdown()
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|
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@ -202,73 +159,47 @@ func (s *Server) handlePeerConnected(p Peer) {
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p.callVersion(msg)
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}
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type versionTuple struct {
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peer Peer
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request *payload.Version
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response chan *Message
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}
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func (s *Server) handleVersionCmd(msg *Message, p Peer) *Message {
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t := versionTuple{
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peer: p,
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request: msg.Payload.(*payload.Version),
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response: make(chan *Message),
|
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version := msg.Payload.(*payload.Version)
|
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if s.id == version.Nonce {
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p.disconnect()
|
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return nil
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}
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|
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s.versionCh <- t
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|
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return <-t.response
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}
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|
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type getaddrTuple struct {
|
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peer Peer
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request *Message
|
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response chan *Message
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if p.addr().Port != version.Port {
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p.disconnect()
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return nil
|
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}
|
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return newMessage(ModeDevNet, cmdVerack, nil)
|
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}
|
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|
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func (s *Server) handleGetaddrCmd(msg *Message, p Peer) *Message {
|
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t := getaddrTuple{
|
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peer: p,
|
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request: msg,
|
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response: make(chan *Message),
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}
|
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|
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s.getaddrCh <- t
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|
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return <-t.response
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}
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|
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type invTuple struct {
|
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peer Peer
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request *payload.Inventory
|
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response chan *Message
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return nil
|
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}
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|
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func (s *Server) handleInvCmd(msg *Message, p Peer) *Message {
|
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t := invTuple{
|
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request: msg.Payload.(*payload.Inventory),
|
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response: make(chan *Message),
|
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inv := msg.Payload.(*payload.Inventory)
|
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if !inv.Type.Valid() {
|
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p.disconnect()
|
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return nil
|
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}
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if len(inv.Hashes) == 0 {
|
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p.disconnect()
|
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return nil
|
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}
|
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|
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s.invCh <- t
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|
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return <-t.response
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payload := payload.NewInventory(inv.Type, inv.Hashes)
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resp := newMessage(s.net, cmdGetData, payload)
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return resp
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}
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|
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type addrTuple struct {
|
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request *payload.AddressList
|
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response chan bool
|
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}
|
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|
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func (s *Server) handleAddrCmd(msg *Message, p Peer) bool {
|
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t := addrTuple{
|
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request: msg.Payload.(*payload.AddressList),
|
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response: make(chan bool),
|
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func (s *Server) handleAddrCmd(msg *Message, p Peer) {
|
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addrList := msg.Payload.(*payload.AddressList)
|
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for _, addr := range addrList.Addrs {
|
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if !s.peerAlreadyConnected(addr.Addr) {
|
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// TODO: this is not transport abstracted.
|
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go connectToRemoteNode(s, addr.Addr.String())
|
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}
|
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}
|
||||
|
||||
s.addrCh <- t
|
||||
|
||||
return <-t.response
|
||||
}
|
||||
|
||||
// check if the addr is already connected to the server.
|
||||
|
|
@ -283,6 +214,7 @@ func (s *Server) peerAlreadyConnected(addr net.Addr) bool {
|
|||
|
||||
func (s *Server) sendLoop(peer Peer) {
|
||||
// TODO: check if this peer is still connected.
|
||||
// dont keep asking (maxPeers and no new nodes)
|
||||
for {
|
||||
getaddrMsg := newMessage(s.net, cmdGetAddr, nil)
|
||||
peer.callGetaddr(getaddrMsg)
|
||||
|
|
@ -291,6 +223,31 @@ func (s *Server) sendLoop(peer Peer) {
|
|||
}
|
||||
}
|
||||
|
||||
type peerCount struct {
|
||||
count chan int
|
||||
}
|
||||
|
||||
// peerCount returns the number of connected peers to this server.
|
||||
func (s *Server) peerCount() int {
|
||||
ch := peerCount{
|
||||
count: make(chan int),
|
||||
}
|
||||
|
||||
s.peerCountCh <- ch
|
||||
|
||||
return <-ch.count
|
||||
}
|
||||
|
||||
// StartOpts holds the server configuration.
|
||||
type StartOpts struct {
|
||||
// tcp port
|
||||
TCP int
|
||||
// slice of peer addresses the server will connect to
|
||||
Seeds []string
|
||||
// JSON-RPC port. If 0 no RPC handler will be attached.
|
||||
RPC int
|
||||
}
|
||||
|
||||
func logo() string {
|
||||
return `
|
||||
_ ____________ __________
|
||||
|
|
|
|||
|
|
@ -24,6 +24,20 @@ func TestHandleVersion(t *testing.T) {
|
|||
}
|
||||
}
|
||||
|
||||
func TestPeerCount(t *testing.T) {
|
||||
s := NewServer(ModeDevNet)
|
||||
go s.loop()
|
||||
|
||||
lenPeers := 10
|
||||
for i := 0; i < lenPeers; i++ {
|
||||
s.register <- NewLocalPeer(s)
|
||||
}
|
||||
|
||||
if have, want := s.peerCount(), lenPeers; want != have {
|
||||
t.Fatalf("expected %d connected peers got %d", want, have)
|
||||
}
|
||||
}
|
||||
|
||||
func TestHandleAddrCmd(t *testing.T) {
|
||||
// todo
|
||||
}
|
||||
|
|
|
|||
|
|
@ -2,13 +2,15 @@ package network
|
|||
|
||||
import (
|
||||
"bytes"
|
||||
"fmt"
|
||||
"net"
|
||||
|
||||
"github.com/anthdm/neo-go/pkg/network/payload"
|
||||
"github.com/anthdm/neo-go/pkg/util"
|
||||
)
|
||||
|
||||
func listenTCP(s *Server, port string) error {
|
||||
ln, err := net.Listen("tcp", port)
|
||||
func listenTCP(s *Server, port int) error {
|
||||
ln, err := net.Listen("tcp", fmt.Sprintf(":%d", port))
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
|
@ -73,10 +75,11 @@ func handleConnection(s *Server, conn net.Conn) {
|
|||
}
|
||||
}
|
||||
|
||||
// handleMessage hands the message received from a TCP connection over to the server.
|
||||
func handleMessage(msg *Message, s *Server, p *TCPPeer) {
|
||||
command := msg.commandType()
|
||||
|
||||
s.logger.Printf("%d :: IN :: %s :: %v", p.id(), command, msg)
|
||||
s.logger.Printf("IN :: %d :: %s :: %v", p.id(), command, msg)
|
||||
|
||||
switch command {
|
||||
case cmdVersion:
|
||||
|
|
@ -103,3 +106,82 @@ func handleMessage(msg *Message, s *Server, p *TCPPeer) {
|
|||
default:
|
||||
}
|
||||
}
|
||||
|
||||
// TCPPeer represents a remote node, backed by TCP transport.
|
||||
type TCPPeer struct {
|
||||
s *Server
|
||||
// nonce (id) of the peer.
|
||||
nonce uint32
|
||||
// underlying TCP connection
|
||||
conn net.Conn
|
||||
// host and port information about this peer.
|
||||
endpoint util.Endpoint
|
||||
// channel to coordinate messages writen back to the connection.
|
||||
send chan *Message
|
||||
// whether this peers version was acknowledged.
|
||||
isVerack bool
|
||||
}
|
||||
|
||||
// NewTCPPeer returns a pointer to a TCP Peer.
|
||||
func NewTCPPeer(conn net.Conn, s *Server) *TCPPeer {
|
||||
e, _ := util.EndpointFromString(conn.RemoteAddr().String())
|
||||
|
||||
return &TCPPeer{
|
||||
conn: conn,
|
||||
send: make(chan *Message),
|
||||
endpoint: e,
|
||||
s: s,
|
||||
}
|
||||
}
|
||||
|
||||
func (p *TCPPeer) callVersion(msg *Message) {
|
||||
p.send <- msg
|
||||
}
|
||||
|
||||
// id implements the peer interface
|
||||
func (p *TCPPeer) id() uint32 {
|
||||
return p.nonce
|
||||
}
|
||||
|
||||
// endpoint implements the peer interface
|
||||
func (p *TCPPeer) addr() util.Endpoint {
|
||||
return p.endpoint
|
||||
}
|
||||
|
||||
// verack implements the peer interface
|
||||
func (p *TCPPeer) verack() bool {
|
||||
return p.isVerack
|
||||
}
|
||||
|
||||
// callGetaddr will send the "getaddr" command to the remote.
|
||||
func (p *TCPPeer) callGetaddr(msg *Message) {
|
||||
p.send <- msg
|
||||
}
|
||||
|
||||
// disconnect closes the send channel and the underlying connection.
|
||||
func (p *TCPPeer) disconnect() {
|
||||
close(p.send)
|
||||
p.conn.Close()
|
||||
}
|
||||
|
||||
// writeLoop writes messages to the underlying TCP connection.
|
||||
// A goroutine writeLoop is started for each connection.
|
||||
// There should be at most one writer to a connection executing
|
||||
// all writes from this goroutine.
|
||||
func (p *TCPPeer) writeLoop() {
|
||||
// clean up the connection.
|
||||
defer func() {
|
||||
p.conn.Close()
|
||||
}()
|
||||
|
||||
for {
|
||||
msg := <-p.send
|
||||
|
||||
p.s.logger.Printf("OUT :: %s :: %+v", msg.commandType(), msg.Payload)
|
||||
|
||||
// should we disconnect here?
|
||||
if err := msg.encode(p.conn); err != nil {
|
||||
p.s.logger.Printf("encode error: %s", err)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue