/
deliverevents.go
285 lines (243 loc) · 8.89 KB
/
deliverevents.go
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//<developer>
// <name>linapex 曹一峰</name>
// <email>linapex@163.com</email>
// <wx>superexc</wx>
// <qqgroup>128148617</qqgroup>
// <url>https://jsq.ink</url>
// <role>pku engineer</role>
// <date>2019-03-16 19:40:16</date>
//</624456038724145152>
/*
版权所有IBM公司。保留所有权利。
SPDX许可证标识符:Apache-2.0
**/
package peer
import (
"runtime/debug"
"time"
"github.com/golang/protobuf/proto"
"github.com/hyperledger/fabric/common/deliver"
"github.com/hyperledger/fabric/common/flogging"
"github.com/hyperledger/fabric/common/metrics"
"github.com/hyperledger/fabric/core/aclmgmt/resources"
"github.com/hyperledger/fabric/core/ledger/util"
"github.com/hyperledger/fabric/protos/common"
"github.com/hyperledger/fabric/protos/peer"
"github.com/hyperledger/fabric/protos/utils"
"github.com/pkg/errors"
"github.com/spf13/viper"
)
var logger = flogging.MustGetLogger("common.deliverevents")
//PolicyCheckerProvider为
//给定资源名称
type PolicyCheckerProvider func(resourceName string) deliver.PolicyCheckerFunc
//服务器保留创建传递服务器所需的依赖项
type server struct {
dh *deliver.Handler
policyCheckerProvider PolicyCheckerProvider
}
//用于发送块响应的BlockResponseSender结构
type blockResponseSender struct {
peer.Deliver_DeliverServer
}
//sendstatusResponse生成状态回复协议消息
func (brs *blockResponseSender) SendStatusResponse(status common.Status) error {
reply := &peer.DeliverResponse{
Type: &peer.DeliverResponse_Status{Status: status},
}
return brs.Send(reply)
}
//sendblockresponse生成带有块消息的传递响应
func (brs *blockResponseSender) SendBlockResponse(block *common.Block) error {
response := &peer.DeliverResponse{
Type: &peer.DeliverResponse_Block{Block: block},
}
return brs.Send(response)
}
//用于发送筛选的块响应的filteredBlockResponseSender结构
type filteredBlockResponseSender struct {
peer.Deliver_DeliverFilteredServer
}
//sendstatusResponse生成状态回复协议消息
func (fbrs *filteredBlockResponseSender) SendStatusResponse(status common.Status) error {
response := &peer.DeliverResponse{
Type: &peer.DeliverResponse_Status{Status: status},
}
return fbrs.Send(response)
}
//isfiltered是一个标记方法,它指示此响应发送者
//发送筛选的块。
func (fbrs *filteredBlockResponseSender) IsFiltered() bool {
return true
}
//sendblockresponse生成带有块消息的传递响应
func (fbrs *filteredBlockResponseSender) SendBlockResponse(block *common.Block) error {
//生成过滤块响应
b := blockEvent(*block)
filteredBlock, err := b.toFilteredBlock()
if err != nil {
logger.Warningf("Failed to generate filtered block due to: %s", err)
return fbrs.SendStatusResponse(common.Status_BAD_REQUEST)
}
response := &peer.DeliverResponse{
Type: &peer.DeliverResponse_FilteredBlock{FilteredBlock: filteredBlock},
}
return fbrs.Send(response)
}
//peer.transaction pointers切片的transactionactions别名
type transactionActions []*peer.TransactionAction
//blockEvent是common.block结构的别名,用于
//使用辅助功能扩展
type blockEvent common.Block
//交付在承诺之后向客户发送一个块流
func (s *server) DeliverFiltered(srv peer.Deliver_DeliverFilteredServer) error {
logger.Debugf("Starting new DeliverFiltered handler")
defer dumpStacktraceOnPanic()
//正在根据resources.event_filteredblock resource name获取策略检查器
deliverServer := &deliver.Server{
Receiver: srv,
PolicyChecker: s.policyCheckerProvider(resources.Event_FilteredBlock),
ResponseSender: &filteredBlockResponseSender{
Deliver_DeliverFilteredServer: srv,
},
}
return s.dh.Handle(srv.Context(), deliverServer)
}
//交付在承诺之后向客户发送一个块流
func (s *server) Deliver(srv peer.Deliver_DeliverServer) (err error) {
logger.Debugf("Starting new Deliver handler")
defer dumpStacktraceOnPanic()
//正在根据resources.event\u块资源名称获取策略检查器
deliverServer := &deliver.Server{
PolicyChecker: s.policyCheckerProvider(resources.Event_Block),
Receiver: srv,
ResponseSender: &blockResponseSender{
Deliver_DeliverServer: srv,
},
}
return s.dh.Handle(srv.Context(), deliverServer)
}
//NewDeliverEventsServer创建一个对等端。传递服务器以传递块和
//筛选的块事件
func NewDeliverEventsServer(mutualTLS bool, policyCheckerProvider PolicyCheckerProvider, chainManager deliver.ChainManager, metricsProvider metrics.Provider) peer.DeliverServer {
timeWindow := viper.GetDuration("peer.authentication.timewindow")
if timeWindow == 0 {
defaultTimeWindow := 15 * time.Minute
logger.Warningf("`peer.authentication.timewindow` not set; defaulting to %s", defaultTimeWindow)
timeWindow = defaultTimeWindow
}
metrics := deliver.NewMetrics(metricsProvider)
return &server{
dh: deliver.NewHandler(chainManager, timeWindow, mutualTLS, metrics),
policyCheckerProvider: policyCheckerProvider,
}
}
func (s *server) sendProducer(srv peer.Deliver_DeliverFilteredServer) func(msg proto.Message) error {
return func(msg proto.Message) error {
response, ok := msg.(*peer.DeliverResponse)
if !ok {
logger.Errorf("received wrong response type, expected response type peer.DeliverResponse")
return errors.New("expected response type peer.DeliverResponse")
}
return srv.Send(response)
}
}
func (block *blockEvent) toFilteredBlock() (*peer.FilteredBlock, error) {
filteredBlock := &peer.FilteredBlock{
Number: block.Header.Number,
}
txsFltr := util.TxValidationFlags(block.Metadata.Metadata[common.BlockMetadataIndex_TRANSACTIONS_FILTER])
for txIndex, ebytes := range block.Data.Data {
var env *common.Envelope
var err error
if ebytes == nil {
logger.Debugf("got nil data bytes for tx index %d, "+
"block num %d", txIndex, block.Header.Number)
continue
}
env, err = utils.GetEnvelopeFromBlock(ebytes)
if err != nil {
logger.Errorf("error getting tx from block, %s", err)
continue
}
//从信封中获取有效载荷
payload, err := utils.GetPayload(env)
if err != nil {
return nil, errors.WithMessage(err, "could not extract payload from envelope")
}
if payload.Header == nil {
logger.Debugf("transaction payload header is nil, %d, block num %d",
txIndex, block.Header.Number)
continue
}
chdr, err := utils.UnmarshalChannelHeader(payload.Header.ChannelHeader)
if err != nil {
return nil, err
}
filteredBlock.ChannelId = chdr.ChannelId
filteredTransaction := &peer.FilteredTransaction{
Txid: chdr.TxId,
Type: common.HeaderType(chdr.Type),
TxValidationCode: txsFltr.Flag(txIndex),
}
if filteredTransaction.Type == common.HeaderType_ENDORSER_TRANSACTION {
tx, err := utils.GetTransaction(payload.Data)
if err != nil {
return nil, errors.WithMessage(err, "error unmarshal transaction payload for block event")
}
filteredTransaction.Data, err = transactionActions(tx.Actions).toFilteredActions()
if err != nil {
logger.Errorf(err.Error())
return nil, err
}
}
filteredBlock.FilteredTransactions = append(filteredBlock.FilteredTransactions, filteredTransaction)
}
return filteredBlock, nil
}
func (ta transactionActions) toFilteredActions() (*peer.FilteredTransaction_TransactionActions, error) {
transactionActions := &peer.FilteredTransactionActions{}
for _, action := range ta {
chaincodeActionPayload, err := utils.GetChaincodeActionPayload(action.Payload)
if err != nil {
return nil, errors.WithMessage(err, "error unmarshal transaction action payload for block event")
}
if chaincodeActionPayload.Action == nil {
logger.Debugf("chaincode action, the payload action is nil, skipping")
continue
}
propRespPayload, err := utils.GetProposalResponsePayload(chaincodeActionPayload.Action.ProposalResponsePayload)
if err != nil {
return nil, errors.WithMessage(err, "error unmarshal proposal response payload for block event")
}
caPayload, err := utils.GetChaincodeAction(propRespPayload.Extension)
if err != nil {
return nil, errors.WithMessage(err, "error unmarshal chaincode action for block event")
}
ccEvent, err := utils.GetChaincodeEvents(caPayload.Events)
if err != nil {
return nil, errors.WithMessage(err, "error unmarshal chaincode event for block event")
}
if ccEvent.GetChaincodeId() != "" {
filteredAction := &peer.FilteredChaincodeAction{
ChaincodeEvent: &peer.ChaincodeEvent{
TxId: ccEvent.TxId,
ChaincodeId: ccEvent.ChaincodeId,
EventName: ccEvent.EventName,
},
}
transactionActions.ChaincodeActions = append(transactionActions.ChaincodeActions, filteredAction)
}
}
return &peer.FilteredTransaction_TransactionActions{
TransactionActions: transactionActions,
}, nil
}
func dumpStacktraceOnPanic() {
func() {
if r := recover(); r != nil {
logger.Criticalf("Deliver client triggered panic: %s\n%s", r, debug.Stack())
}
logger.Debugf("Closing Deliver stream")
}()
}