/
service.go
312 lines (262 loc) · 7.36 KB
/
service.go
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package service
import (
"context"
"io"
"net"
"net/http"
"os"
"sync"
"time"
"connectrpc.com/connect"
"connectrpc.com/grpchealth"
"connectrpc.com/grpcreflect"
"github.com/gnolang/gno/gno.land/pkg/gnoclient"
rpcclient "github.com/gnolang/gno/tm2/pkg/bft/rpc/client"
"github.com/gnolang/gno/tm2/pkg/crypto/keys"
api_gen "github.com/gnolang/gnonative/api/gen/go"
"github.com/gnolang/gnonative/api/gen/go/_goconnect"
"github.com/pkg/errors"
"github.com/rs/cors"
"go.uber.org/zap"
"golang.org/x/net/http2"
"golang.org/x/net/http2/h2c"
"moul.io/u"
)
type GnoNativeService interface {
GetUDSPath() string
GetTcpAddr() string
GetTcpPort() int
io.Closer
}
type userAccount struct {
keyInfo keys.Info
password string
}
type gnoNativeService struct {
logger *zap.Logger
client *gnoclient.Client
tcpAddr string
tcpPort int
udsPath string
lock sync.RWMutex
// The remote node address used to create client.RPCClient. We need to save this
// here because the remote is a private member of the HTTP struct.
remote string
// Map of key name to userAccount.
userAccounts map[string]*userAccount
// The active account in userAccounts, or nil if none
activeAccount *userAccount
listeners []net.Listener
server *http.Server
closeFunc func()
}
var _ GnoNativeService = (*gnoNativeService)(nil)
// NewGnoNativeService create a new GnoNative service along with a gRPC server listening on UDS by default.
func NewGnoNativeService(opts ...GnoNativeOption) (GnoNativeService, error) {
cfg := &Config{}
if err := cfg.applyOptions(append(opts, WithFallbackDefaults)...); err != nil {
return nil, err
}
svc, err := initService(cfg)
if err != nil {
return nil, err
}
// Use UDS by default
if !cfg.DisableUdsListener {
if err := svc.createUdsGrpcServer(cfg); err != nil {
svc.closeFunc()
return nil, err
}
}
if cfg.UseTcpListener {
if err := svc.createTcpGrpcServer(); err != nil {
svc.closeFunc()
return nil, err
}
}
return svc, nil
}
func initService(cfg *Config) (*gnoNativeService, error) {
svc := &gnoNativeService{
logger: cfg.Logger,
tcpAddr: cfg.TcpAddr,
udsPath: cfg.UdsPath,
userAccounts: make(map[string]*userAccount),
closeFunc: func() {},
}
if err := cfg.checkDirs(); err != nil {
return nil, err
}
kb, _ := keys.NewKeyBaseFromDir(cfg.RootDir)
signer := &gnoclient.SignerFromKeybase{
Keybase: kb,
ChainID: cfg.ChainID,
}
rpcClient := rpcclient.NewHTTP(cfg.Remote, "/websocket")
svc.remote = cfg.Remote
svc.client = &gnoclient.Client{
Signer: signer,
RPCClient: rpcClient,
}
return svc, nil
}
// Get s.client.Signer as a SignerFromKeybase.
func (s *gnoNativeService) getSigner() *gnoclient.SignerFromKeybase {
signer, ok := s.client.Signer.(*gnoclient.SignerFromKeybase)
if !ok {
// We only set s.client.Signer in initService, so this shouldn't happen.
panic("signer is not gnoclient.SignerFromKeybase")
}
return signer
}
func (s *gnoNativeService) createUdsGrpcServer(cfg *Config) error {
s.logger.Debug("createUdsGrpcServer called")
// delete socket if it already exists
if _, err := os.Stat(s.udsPath); !os.IsNotExist(err) {
if err := os.RemoveAll(s.udsPath); err != nil {
s.logger.Debug("createUDSListener error", zap.Error(err))
return api_gen.ErrCode_ErrRunGRPCServer.Wrap(err)
}
}
listener, err := net.Listen("unix", s.udsPath)
if err != nil {
s.logger.Debug("createUDSListener error", zap.Error(err))
return api_gen.ErrCode_ErrRunGRPCServer.Wrap(err)
}
s.lock.Lock()
s.listeners = append(s.listeners, listener)
s.lock.Unlock()
if err := s.runGRPCServer(listener); err != nil {
return err
}
s.logger.Info("createUDSListener: gRPC server listens to", zap.String("path", s.udsPath))
return nil
}
func (s *gnoNativeService) createTcpGrpcServer() error {
s.logger.Debug("createTcpGrpcServer called")
listener, err := net.Listen("tcp", s.tcpAddr)
if err != nil {
s.logger.Debug("createTcpGrpcServer error", zap.Error(err))
return api_gen.ErrCode_ErrRunGRPCServer.Wrap(err)
}
s.lock.Lock()
s.listeners = append(s.listeners, listener)
s.lock.Unlock()
// update the tcpPort field
addr := listener.Addr().String()
_, portStr, err := net.SplitHostPort(addr)
if err != nil {
s.logger.Debug("createTcpGrpcServer error", zap.Error(err))
return api_gen.ErrCode_ErrRunGRPCServer.Wrap(err)
}
portInt, err := net.LookupPort("tcp", portStr)
if err != nil {
s.logger.Debug("createTcpGrpcServer error", zap.Error(err))
return api_gen.ErrCode_ErrRunGRPCServer.Wrap(err)
}
s.tcpPort = portInt
if err := s.runGRPCServer(listener); err != nil {
return err
}
s.logger.Info("createTcpGrpcServer: gRPC server listens to", zap.Int("port", portInt))
return nil
}
func newCORS() *cors.Cors {
// To let web developers play with the demo service from browsers, we need a
// very permissive CORS setup.
return cors.New(cors.Options{
AllowedMethods: []string{
http.MethodHead,
http.MethodGet,
http.MethodPost,
http.MethodPut,
http.MethodPatch,
http.MethodDelete,
},
AllowOriginFunc: func(origin string) bool {
// Allow all origins, which effectively disables CORS.
return true
},
AllowedHeaders: []string{"*"},
ExposedHeaders: []string{
// Content-Type is in the default safelist.
"Accept",
"Accept-Encoding",
"Accept-Post",
"Connect-Accept-Encoding",
"Connect-Content-Encoding",
"Content-Encoding",
"Grpc-Accept-Encoding",
"Grpc-Encoding",
"Grpc-Message",
"Grpc-Status",
"Grpc-Status-Details-Bin",
},
// Let browsers cache CORS information for longer, which reduces the number
// of preflight requests. Any changes to ExposedHeaders won't take effect
// until the cached data expires. FF caps this value at 24h, and modern
// Chrome caps it at 2h.
MaxAge: int(2 * time.Hour / time.Second),
})
}
func (s *gnoNativeService) runGRPCServer(listener net.Listener) error {
mux := http.NewServeMux()
compress1KB := connect.WithCompressMinBytes(1024)
mux.Handle(_goconnect.NewGnoNativeServiceHandler(
s,
compress1KB,
))
mux.Handle(grpchealth.NewHandler(
grpchealth.NewStaticChecker(_goconnect.GnoNativeServiceName),
compress1KB,
))
mux.Handle(grpcreflect.NewHandlerV1(
grpcreflect.NewStaticReflector(_goconnect.GnoNativeServiceName),
compress1KB,
))
mux.Handle(grpcreflect.NewHandlerV1Alpha(
grpcreflect.NewStaticReflector(_goconnect.GnoNativeServiceName),
compress1KB,
))
server := &http.Server{
Handler: h2c.NewHandler(
newCORS().Handler(mux),
&http2.Server{},
),
ReadHeaderTimeout: time.Second,
ReadTimeout: 5 * time.Minute,
WriteTimeout: 5 * time.Minute,
MaxHeaderBytes: 8 * 1024, // 8KiB
}
go func() {
// we dont need to log the error
err := s.server.Serve(listener)
if err != nil && !errors.Is(err, http.ErrServerClosed) {
s.logger.Error("failed to serve the gRPC listener")
}
}()
s.lock.Lock()
s.server = server
s.closeFunc = u.CombineFuncs(s.closeFunc, func() {
if err := server.Shutdown(context.Background()); err != nil {
s.logger.Error("cannot close the gRPC server", zap.Error(err)) //nolint:gocritic
}
})
s.lock.Unlock()
return nil
}
func (s *gnoNativeService) GetTcpAddr() string {
return s.tcpAddr
}
func (s *gnoNativeService) GetTcpPort() int {
return s.tcpPort
}
func (s *gnoNativeService) GetUDSPath() string {
return s.udsPath
}
func (s *gnoNativeService) Close() error {
if s.closeFunc != nil {
s.closeFunc()
}
return nil
}