311 lines
8.3 KiB
Go
311 lines
8.3 KiB
Go
package server
|
|
|
|
import (
|
|
"context"
|
|
"crypto/sha256"
|
|
"fmt"
|
|
"hash"
|
|
"log"
|
|
"net"
|
|
"net/http"
|
|
"os"
|
|
"regexp"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/ReneKroon/ttlcache/v2"
|
|
"github.com/lbryio/hub/internal/metrics"
|
|
"github.com/lbryio/hub/meta"
|
|
pb "github.com/lbryio/hub/protobuf/go"
|
|
"github.com/olivere/elastic/v7"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"github.com/prometheus/client_golang/prometheus/promhttp"
|
|
"google.golang.org/grpc"
|
|
"google.golang.org/grpc/reflection"
|
|
)
|
|
|
|
type Server struct {
|
|
GrpcServer *grpc.Server
|
|
Args *Args
|
|
MultiSpaceRe *regexp.Regexp
|
|
WeirdCharsRe *regexp.Regexp
|
|
EsClient *elastic.Client
|
|
QueryCache *ttlcache.Cache
|
|
S256 *hash.Hash
|
|
LastRefreshCheck time.Time
|
|
RefreshDelta time.Duration
|
|
NumESRefreshes int64
|
|
PeerServers map[string]*FederatedServer
|
|
PeerServersMut sync.RWMutex
|
|
NumPeerServers *int64
|
|
PeerSubs map[string]*FederatedServer
|
|
PeerSubsMut sync.RWMutex
|
|
NumPeerSubs *int64
|
|
ExternalIP net.IP
|
|
pb.UnimplementedHubServer
|
|
}
|
|
|
|
func getVersion() string {
|
|
return meta.Version
|
|
}
|
|
|
|
/*
|
|
'blockchain.block.get_chunk'
|
|
'blockchain.block.get_header'
|
|
'blockchain.estimatefee'
|
|
'blockchain.relayfee'
|
|
'blockchain.scripthash.get_balance'
|
|
'blockchain.scripthash.get_history'
|
|
'blockchain.scripthash.get_mempool'
|
|
'blockchain.scripthash.listunspent'
|
|
'blockchain.scripthash.subscribe'
|
|
'blockchain.transaction.broadcast'
|
|
'blockchain.transaction.get'
|
|
'blockchain.transaction.get_batch'
|
|
'blockchain.transaction.info'
|
|
'blockchain.transaction.get_merkle'
|
|
'server.add_peer'
|
|
'server.banner'
|
|
'server.payment_address'
|
|
'server.donation_address'
|
|
'server.features'
|
|
'server.peers.subscribe'
|
|
'server.version'
|
|
'blockchain.transaction.get_height'
|
|
'blockchain.claimtrie.search'
|
|
'blockchain.claimtrie.resolve'
|
|
'blockchain.claimtrie.getclaimsbyids'
|
|
'blockchain.block.get_server_height'
|
|
'mempool.get_fee_histogram'
|
|
'blockchain.block.headers'
|
|
'server.ping'
|
|
'blockchain.headers.subscribe'
|
|
'blockchain.address.get_balance'
|
|
'blockchain.address.get_history'
|
|
'blockchain.address.get_mempool'
|
|
'blockchain.address.listunspent'
|
|
'blockchain.address.subscribe'
|
|
'blockchain.address.unsubscribe'
|
|
*/
|
|
|
|
func (s *Server) PeerSubsLoadOrStore(peer *FederatedServer) (actual *FederatedServer, loaded bool) {
|
|
key := peer.peerKey()
|
|
s.PeerSubsMut.RLock()
|
|
if actual, ok := s.PeerSubs[key]; ok {
|
|
s.PeerSubsMut.RUnlock()
|
|
return actual, true
|
|
} else {
|
|
s.PeerSubsMut.RUnlock()
|
|
s.PeerSubsMut.Lock()
|
|
s.PeerSubs[key] = peer
|
|
s.PeerSubsMut.Unlock()
|
|
return peer, false
|
|
}
|
|
}
|
|
|
|
func (s *Server) PeerServersLoadOrStore(peer *FederatedServer) (actual *FederatedServer, loaded bool) {
|
|
key := peer.peerKey()
|
|
s.PeerServersMut.RLock()
|
|
if actual, ok := s.PeerServers[key]; ok {
|
|
s.PeerServersMut.RUnlock()
|
|
return actual, true
|
|
} else {
|
|
s.PeerServersMut.RUnlock()
|
|
s.PeerServersMut.Lock()
|
|
s.PeerServers[key] = peer
|
|
s.PeerServersMut.Unlock()
|
|
return peer, false
|
|
}
|
|
}
|
|
|
|
func (s *Server) Run() {
|
|
l, err := net.Listen("tcp", ":"+s.Args.Port)
|
|
if err != nil {
|
|
log.Fatalf("failed to listen: %v", err)
|
|
}
|
|
|
|
pb.RegisterHubServer(s.GrpcServer, s)
|
|
reflection.Register(s.GrpcServer)
|
|
|
|
log.Printf("listening on %s\n", l.Addr().String())
|
|
log.Println(s.Args)
|
|
if err := s.GrpcServer.Serve(l); err != nil {
|
|
log.Fatalf("failed to serve: %v", err)
|
|
}
|
|
}
|
|
|
|
// MakeHubServer takes the arguments given to a hub when it's started and
|
|
// initializes everything. It loads information about previously known peers,
|
|
// creates needed internal data structures, and initializes goroutines.
|
|
func MakeHubServer(ctx context.Context, args *Args) *Server {
|
|
grpcServer := grpc.NewServer(grpc.NumStreamWorkers(10))
|
|
|
|
multiSpaceRe, err := regexp.Compile(`\s{2,}`)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
weirdCharsRe, err := regexp.Compile("[#!~]")
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
|
|
var client *elastic.Client = nil
|
|
if !args.DisableEs {
|
|
esUrl := args.EsHost + ":" + args.EsPort
|
|
opts := []elastic.ClientOptionFunc{
|
|
elastic.SetSniff(true),
|
|
elastic.SetSnifferTimeoutStartup(time.Second * 60),
|
|
elastic.SetSnifferTimeout(time.Second * 60),
|
|
elastic.SetURL(esUrl),
|
|
}
|
|
if args.Debug {
|
|
opts = append(opts, elastic.SetTraceLog(log.New(os.Stderr, "[[ELASTIC]]", 0)))
|
|
}
|
|
client, err = elastic.NewClient(opts...)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|
|
|
|
cache := ttlcache.NewCache()
|
|
err = cache.SetTTL(time.Duration(args.CacheTTL) * time.Minute)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
s256 := sha256.New()
|
|
var refreshDelta = time.Second * time.Duration(args.RefreshDelta)
|
|
if args.Debug {
|
|
refreshDelta = time.Second * 0
|
|
}
|
|
|
|
numPeers := new(int64)
|
|
*numPeers = 0
|
|
numSubs := new(int64)
|
|
*numSubs = 0
|
|
|
|
s := &Server{
|
|
GrpcServer: grpcServer,
|
|
Args: args,
|
|
MultiSpaceRe: multiSpaceRe,
|
|
WeirdCharsRe: weirdCharsRe,
|
|
EsClient: client,
|
|
QueryCache: cache,
|
|
S256: &s256,
|
|
LastRefreshCheck: time.Now(),
|
|
RefreshDelta: refreshDelta,
|
|
NumESRefreshes: 0,
|
|
PeerServers: make(map[string]*FederatedServer),
|
|
PeerServersMut: sync.RWMutex{},
|
|
NumPeerServers: numPeers,
|
|
PeerSubs: make(map[string]*FederatedServer),
|
|
PeerSubsMut: sync.RWMutex{},
|
|
NumPeerSubs: numSubs,
|
|
ExternalIP: net.IPv4(127, 0, 0, 1),
|
|
}
|
|
|
|
// Start up our background services
|
|
if !args.DisableStartPrometheus {
|
|
go s.prometheusEndpoint(s.Args.PrometheusPort, "metrics")
|
|
}
|
|
if !args.DisableStartUDP {
|
|
go func() {
|
|
err := UDPServer(args)
|
|
if err != nil {
|
|
log.Println("UDP Server failed!", err)
|
|
}
|
|
}()
|
|
}
|
|
// Load peers from disk and subscribe to one if there are any
|
|
if !args.DisableLoadPeers {
|
|
go func() {
|
|
err := s.loadPeers()
|
|
if err != nil {
|
|
log.Println(err)
|
|
}
|
|
}()
|
|
}
|
|
|
|
return s
|
|
}
|
|
|
|
// prometheusEndpoint is a goroutine which start up a prometheus endpoint
|
|
// for this hub to allow for metric tracking.
|
|
func (s *Server) prometheusEndpoint(port string, endpoint string) {
|
|
http.Handle("/"+endpoint, promhttp.Handler())
|
|
log.Println(fmt.Sprintf("listening on :%s /%s", port, endpoint))
|
|
err := http.ListenAndServe(":"+port, nil)
|
|
log.Fatalln("Shouldn't happen??!?!", err)
|
|
}
|
|
|
|
// Hello is a grpc endpoint to allow another hub to tell us about itself.
|
|
// The passed message includes information about the other hub, and all
|
|
// of its peers which are added to the knowledge of this hub.
|
|
func (s *Server) Hello(ctx context.Context, args *pb.HelloMessage) (*pb.HelloMessage, error) {
|
|
metrics.RequestsCount.With(prometheus.Labels{"method": "hello"}).Inc()
|
|
port := args.Port
|
|
host := args.Host
|
|
server := &FederatedServer{
|
|
Address: host,
|
|
Port: port,
|
|
Ts: time.Now(),
|
|
}
|
|
log.Println(server)
|
|
|
|
err := s.addPeer(&pb.ServerMessage{Address: host, Port: port}, false, true)
|
|
// They just contacted us, so this shouldn't happen
|
|
if err != nil {
|
|
log.Println(err)
|
|
}
|
|
s.mergeFederatedServers(args.Servers)
|
|
s.writePeers()
|
|
s.notifyPeerSubs(server)
|
|
|
|
return s.makeHelloMessage(), nil
|
|
}
|
|
|
|
// PeerSubscribe adds a peer hub to the list of subscribers to update about
|
|
// new peers.
|
|
func (s *Server) PeerSubscribe(ctx context.Context, in *pb.ServerMessage) (*pb.StringValue, error) {
|
|
metrics.RequestsCount.With(prometheus.Labels{"method": "peer_subscribe"}).Inc()
|
|
var msg = "Success"
|
|
peer := &FederatedServer{
|
|
Address: in.Address,
|
|
Port: in.Port,
|
|
Ts: time.Now(),
|
|
}
|
|
|
|
if _, loaded := s.PeerSubsLoadOrStore(peer); !loaded {
|
|
s.incNumSubs()
|
|
metrics.PeersSubscribed.Inc()
|
|
} else {
|
|
msg = "Already subscribed"
|
|
}
|
|
|
|
return &pb.StringValue{Value: msg}, nil
|
|
}
|
|
|
|
// AddPeer is a grpc endpoint to tell this hub about another hub in the network.
|
|
func (s *Server) AddPeer(ctx context.Context, args *pb.ServerMessage) (*pb.StringValue, error) {
|
|
metrics.RequestsCount.With(prometheus.Labels{"method": "add_peer"}).Inc()
|
|
var msg = "Success"
|
|
err := s.addPeer(args, true, true)
|
|
if err != nil {
|
|
log.Println(err)
|
|
msg = "Failed"
|
|
}
|
|
return &pb.StringValue{Value: msg}, err
|
|
}
|
|
|
|
// Ping is a grpc endpoint that returns a short message.
|
|
func (s *Server) Ping(ctx context.Context, args *pb.EmptyMessage) (*pb.StringValue, error) {
|
|
metrics.RequestsCount.With(prometheus.Labels{"method": "ping"}).Inc()
|
|
return &pb.StringValue{Value: "Hello, world!"}, nil
|
|
}
|
|
|
|
// Version is a grpc endpoint to get this hub's version.
|
|
func (s *Server) Version(ctx context.Context, args *pb.EmptyMessage) (*pb.StringValue, error) {
|
|
metrics.RequestsCount.With(prometheus.Labels{"method": "version"}).Inc()
|
|
return &pb.StringValue{Value: getVersion()}, nil
|
|
}
|