github.com/leonlxy/hyperledger@v1.0.0-alpha.0.20170427033203-34922035d248/peer/channel/list.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  	"errors"
    21  	"fmt"
    22  
    23  	"github.com/golang/protobuf/proto"
    24  	"github.com/hyperledger/fabric/core/scc/cscc"
    25  	common2 "github.com/hyperledger/fabric/protos/common"
    26  	pb "github.com/hyperledger/fabric/protos/peer"
    27  	"github.com/hyperledger/fabric/protos/utils"
    28  	"github.com/spf13/cobra"
    29  	"golang.org/x/net/context"
    30  )
    31  
    32  type endorserClient struct {
    33  	cf *ChannelCmdFactory
    34  }
    35  
    36  func (cc *endorserClient) getChannels() ([]*pb.ChannelInfo, error) {
    37  	var err error
    38  
    39  	invocation := &pb.ChaincodeInvocationSpec{
    40  		ChaincodeSpec: &pb.ChaincodeSpec{
    41  			Type:        pb.ChaincodeSpec_Type(pb.ChaincodeSpec_Type_value["GOLANG"]),
    42  			ChaincodeId: &pb.ChaincodeID{Name: "cscc"},
    43  			Input:       &pb.ChaincodeInput{Args: [][]byte{[]byte(cscc.GetChannels)}},
    44  		},
    45  	}
    46  
    47  	var prop *pb.Proposal
    48  	c, _ := cc.cf.Signer.Serialize()
    49  	prop, _, err = utils.CreateProposalFromCIS(common2.HeaderType_ENDORSER_TRANSACTION, "", invocation, c)
    50  	if err != nil {
    51  		return nil, errors.New(fmt.Sprintf("Cannot create proposal, due to %s", err))
    52  	}
    53  
    54  	var signedProp *pb.SignedProposal
    55  	signedProp, err = utils.GetSignedProposal(prop, cc.cf.Signer)
    56  	if err != nil {
    57  		return nil, errors.New(fmt.Sprintf("Cannot create signed proposal, due to %s", err))
    58  	}
    59  
    60  	proposalResp, err := cc.cf.EndorserClient.ProcessProposal(context.Background(), signedProp)
    61  	if err != nil {
    62  		return nil, errors.New(fmt.Sprintf("Failed sending proposal, got %s", err))
    63  	}
    64  
    65  	if proposalResp.Response == nil || proposalResp.Response.Status != 200 {
    66  		return nil, errors.New(fmt.Sprint("Received bad response, status", proposalResp.Response.Status))
    67  	}
    68  
    69  	var channelQueryResponse pb.ChannelQueryResponse
    70  	err = proto.Unmarshal(proposalResp.Response.Payload, &channelQueryResponse)
    71  	if err != nil {
    72  		return nil, errors.New(fmt.Sprintf("Cannot read channels list response, %s", err))
    73  	}
    74  
    75  	return channelQueryResponse.Channels, nil
    76  }
    77  
    78  func listCmd(cf *ChannelCmdFactory) *cobra.Command {
    79  	// Set the flags on the channel start command.
    80  
    81  	return &cobra.Command{
    82  		Use:   "list",
    83  		Short: "List of channels peer has been joined to.",
    84  		Long:  "List of channels peer has been joined to.",
    85  		RunE: func(cmd *cobra.Command, args []string) error {
    86  			return list(cf)
    87  		},
    88  	}
    89  }
    90  
    91  func list(cf *ChannelCmdFactory) error {
    92  	var err error
    93  	if cf == nil {
    94  		cf, err = InitCmdFactory(true)
    95  		if err != nil {
    96  			return err
    97  		}
    98  	}
    99  
   100  	client := &endorserClient{cf}
   101  
   102  	if channels, err := client.getChannels(); err != nil {
   103  		return err
   104  	} else {
   105  		fmt.Println("Channels peers has joined to:")
   106  		for _, channel := range channels {
   107  			fmt.Println("\t", channel.ChannelId)
   108  		}
   109  	}
   110  
   111  	return nil
   112  }