forked from hyperledger/fabric
/
sizefilter.go
53 lines (42 loc) · 1.64 KB
/
sizefilter.go
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/*
Copyright IBM Corp. 2016 All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package sizefilter
import (
"github.com/hyperledger/fabric/orderer/common/filter"
cb "github.com/hyperledger/fabric/protos/common"
ab "github.com/hyperledger/fabric/protos/orderer"
logging "github.com/op/go-logging"
)
var logger = logging.MustGetLogger("orderer/common/sizefilter")
// Support defines the subset of the channel support required to create this filter
type Support interface {
BatchSize() *ab.BatchSize
}
// MaxBytesRule rejects messages larger than maxBytes
func MaxBytesRule(support Support) filter.Rule {
return &maxBytesRule{support: support}
}
type maxBytesRule struct {
support Support
}
func (r *maxBytesRule) Apply(message *cb.Envelope) (filter.Action, filter.Committer) {
maxBytes := r.support.BatchSize().AbsoluteMaxBytes
if size := messageByteSize(message); size > maxBytes {
logger.Warningf("%d byte message payload exceeds maximum allowed %d bytes", size, maxBytes)
return filter.Reject, nil
}
return filter.Forward, nil
}
func messageByteSize(message *cb.Envelope) uint32 {
return uint32(len(message.Payload) + len(message.Signature))
}