// Copyright 2019 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package rpc
import (
"context"
"encoding/binary"
"errors"
"sync"
"time"
)
func newTestServer() *Server {
server := NewServer()
server.idgen = sequentialIDGenerator()
if err := server.RegisterName("test", new(testService)); err != nil {
panic(err)
}
if err := server.RegisterName("nftest", new(notificationTestService)); err != nil {
panic(err)
}
return server
}
func sequentialIDGenerator() func() ID {
var (
mu sync.Mutex
counter uint64
)
return func() ID {
mu.Lock()
defer mu.Unlock()
counter++
id := make([]byte, 8)
binary.BigEndian.PutUint64(id, counter)
return encodeID(id)
}
}
type testService struct{}
type Args struct {
S string
}
type Result struct {
String string
Int int
Args *Args
}
func (s *testService) NoArgsRets() {}
func (s *testService) Echo(str string, i int, args *Args) Result {
return Result{str, i, args}
}
func (s *testService) EchoWithCtx(ctx context.Context, str string, i int, args *Args) Result {
return Result{str, i, args}
}
func (s *testService) Sleep(ctx context.Context, duration time.Duration) {
time.Sleep(duration)
}
func (s *testService) Rets() (string, error) {
return "", nil
}
func (s *testService) InvalidRets1() (error, string) {
return nil, ""
}
func (s *testService) InvalidRets2() (string, string) {
return "", ""
}
func (s *testService) InvalidRets3() (string, string, error) {
return "", "", nil
}
func (s *testService) CallMeBack(ctx context.Context, method string, args []interface{}) (interface{}, error) {
c, ok := ClientFromContext(ctx)
if !ok {
return nil, errors.New("no client")
}
var result interface{}
err := c.Call(&result, method, args...)
return result, err
}
func (s *testService) CallMeBackLater(ctx context.Context, method string, args []interface{}) error {
c, ok := ClientFromContext(ctx)
if !ok {
return errors.New("no client")
}
go func() {
<-ctx.Done()
var result interface{}
c.Call(&result, method, args...)
}()
return nil
}
func (s *testService) Subscription(ctx context.Context) (*Subscription, error) {
return nil, nil
}
type notificationTestService struct {
unsubscribed chan string
gotHangSubscriptionReq chan struct{}
unblockHangSubscription chan struct{}
}
func (s *notificationTestService) Echo(i int) int {
return i
}
func (s *notificationTestService) Unsubscribe(subid string) {
if s.unsubscribed != nil {
s.unsubscribed <- subid
}
}
func (s *notificationTestService) SomeSubscription(ctx context.Context, n, val int) (*Subscription, error) {
notifier, supported := NotifierFromContext(ctx)
if !supported {
return nil, ErrNotificationsUnsupported
}
// By explicitly creating an subscription we make sure that the subscription id is send
// back to the client before the first subscription.Notify is called. Otherwise the
// events might be send before the response for the *_subscribe method.
subscription := notifier.CreateSubscription()
go func() {
for i := 0; i < n; i++ {
if err := notifier.Notify(subscription.ID, val+i); err != nil {
return
}
}
select {
case <-notifier.Closed():
case <-subscription.Err():
}
if s.unsubscribed != nil {
s.unsubscribed <- string(subscription.ID)
}
}()
return subscription, nil
}
// HangSubscription blocks on s.unblockHangSubscription before sending anything.
func (s *notificationTestService) HangSubscription(ctx context.Context, val int) (*Subscription, error) {
notifier, supported := NotifierFromContext(ctx)
if !supported {
return nil, ErrNotificationsUnsupported
}
s.gotHangSubscriptionReq <- struct{}{}
<-s.unblockHangSubscription
subscription := notifier.CreateSubscription()
go func() {
notifier.Notify(subscription.ID, val)
}()
return subscription, nil
}