github.com/leonlxy/hyperledger@v1.0.0-alpha.0.20170427033203-34922035d248/peer/channel/fetchconfig.go (about)

     1  /*
     2  Copyright IBM Corp. 2017 All Rights Reserved.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8                   http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package channel
    18  
    19  import (
    20  	"io/ioutil"
    21  
    22  	"github.com/golang/protobuf/proto"
    23  	cb "github.com/hyperledger/fabric/protos/common"
    24  	"github.com/spf13/cobra"
    25  )
    26  
    27  const fetchCmdDescription = "Fetch configuration block."
    28  
    29  func fetchCmd(cf *ChannelCmdFactory) *cobra.Command {
    30  	createCmd := &cobra.Command{
    31  		Use:   "fetch",
    32  		Short: fetchCmdDescription,
    33  		Long:  fetchCmdDescription,
    34  		RunE: func(cmd *cobra.Command, args []string) error {
    35  			return fetch(cmd, args, cf)
    36  		},
    37  	}
    38  
    39  	return createCmd
    40  }
    41  
    42  func fetch(cmd *cobra.Command, args []string, cf *ChannelCmdFactory) error {
    43  	var err error
    44  	if cf == nil {
    45  		cf, err = InitCmdFactory(false)
    46  		if err != nil {
    47  			return err
    48  		}
    49  	}
    50  
    51  	var block *cb.Block
    52  	if block, err = cf.DeliverClient.getBlock(); err != nil {
    53  		return err
    54  	}
    55  
    56  	b, err := proto.Marshal(block)
    57  	if err != nil {
    58  		return err
    59  	}
    60  
    61  	file := chainID + ".block"
    62  	if err = ioutil.WriteFile(file, b, 0644); err != nil {
    63  		return err
    64  	}
    65  
    66  	return nil
    67  }