Hyperledger Fabric SDK 示例fabric-samples-《balance-transfer》之十二《查询已经加入的channel名称》
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前言
查询peer加入的channel名称。需要如下参数:
- peer节点
路由
app.js
//获取加入channel名称app.get('/channels', function(req, res) { logger.debug('================ GET CHANNELS ======================'); logger.debug('peer: ' + req.query.peer); var peer = req.query.peer; if (!peer) { res.json(getErrorMessage('\'peer\'')); return; } query.getChannels(peer, req.username, req.orgname) .then(function( message) { res.send(message); });});
具体实现
query.js
var getChannels = function(peer, username, org) { // peer地址 var target = buildTarget(peer, org); // channel实例 var channel = helper.getChannelForOrg(org); //client实例 var client = helper.getClientForOrg(org); // 获取当前注册用户 return helper.getRegisteredUsers(username, org).then((member) => { //通过client调用api return client.queryChannels(target); }, (err) => { logger.info('Failed to get submitter "' + username + '"'); return 'Failed to get submitter "' + username + '". Error: ' + err.stack ? err.stack : err; }).then((response) => { //处理响应 if (response) { logger.debug('<<< channels >>>'); var channelNames = []; for (let i = 0; i < response.channels.length; i++) { channelNames.push('channel id: ' + response.channels[i].channel_id); } logger.debug(channelNames); return response; } else { logger.error('response_payloads is null'); return 'response_payloads is null'; } }, (err) => { logger.error('Failed to send query due to error: ' + err.stack ? err.stack : err); return 'Failed to send query due to error: ' + err.stack ? err.stack : err; }).catch((err) => { logger.error('Failed to query with error:' + err.stack ? err.stack : err); return 'Failed to query with error:' + err.stack ? err.stack : err; });};
基本流程
API访问
echo "GET query Channels"echocurl -s -X GET \ "http://localhost:4000/channels?peer=peer1" \ -H "authorization: Bearer $ORG1_TOKEN" \ -H "content-type: application/json"echoecho
控制台打印:
GET query Channels{"channels":[{"channel_id":"mychannel"}]}
后台打印:
[2017-10-16 11:07:43.315] [DEBUG] SampleWebApp - ================ GET CHANNELS ======================[2017-10-16 11:07:43.316] [DEBUG] SampleWebApp - peer: peer1[2017-10-16 11:07:43.316] [DEBUG] Helper - [FileKeyValueStore.js]: FileKeyValueStore.js - constructor[2017-10-16 11:07:43.317] [DEBUG] Helper - [FileKeyValueStore.js]: FileKeyValueStore -- getValue[2017-10-16 11:07:43.319] [DEBUG] Helper - [crypto_ecdsa_aes]: importKey - start[2017-10-16 11:07:43.319] [DEBUG] Helper - [crypto_ecdsa_aes]: importKey - have the key [Circular][2017-10-16 11:07:43.320] [DEBUG] Helper - [utils.CryptoKeyStore]: _getKeyStore resolving store[2017-10-16 11:07:43.320] [DEBUG] Helper - [ecdsa/key.js]: ECDSA curve param X: b3e2a75b9a4fd2b081589b1c45bde49f583aea9d7d466798c7b765c4ca96973d[2017-10-16 11:07:43.320] [DEBUG] Helper - [ecdsa/key.js]: ECDSA curve param Y: c58820e5a9db75ab17841ac158e9389ad0d130a6827dc0682dcb2d2c5dccb349[2017-10-16 11:07:43.322] [DEBUG] Helper - [FileKeyValueStore.js]: FileKeyValueStore -- setValue[2017-10-16 11:07:43.323] [DEBUG] Helper - [utils.CryptoKeyStore]: _getKeyStore resolving store[2017-10-16 11:07:43.324] [DEBUG] Helper - [FileKeyValueStore.js]: FileKeyValueStore -- getValue[2017-10-16 11:07:43.325] [DEBUG] Helper - [ecdsa/key.js]: ECDSA curve param X: b3e2a75b9a4fd2b081589b1c45bde49f583aea9d7d466798c7b765c4ca96973d[2017-10-16 11:07:43.325] [DEBUG] Helper - [ecdsa/key.js]: ECDSA curve param Y: c58820e5a9db75ab17841ac158e9389ad0d130a6827dc0682dcb2d2c5dccb349[2017-10-16 11:07:43.325] [DEBUG] Helper - [ecdsa/key.js]: ECDSA curve param X: b3e2a75b9a4fd2b081589b1c45bde49f583aea9d7d466798c7b765c4ca96973d[2017-10-16 11:07:43.325] [DEBUG] Helper - [ecdsa/key.js]: ECDSA curve param Y: c58820e5a9db75ab17841ac158e9389ad0d130a6827dc0682dcb2d2c5dccb349[2017-10-16 11:07:43.325] [DEBUG] Helper - [ecdsa/key.js]: ECDSA curve param X: b3e2a75b9a4fd2b081589b1c45bde49f583aea9d7d466798c7b765c4ca96973d[2017-10-16 11:07:43.325] [DEBUG] Helper - [ecdsa/key.js]: ECDSA curve param Y: c58820e5a9db75ab17841ac158e9389ad0d130a6827dc0682dcb2d2c5dccb349[2017-10-16 11:07:43.325] [DEBUG] Helper - [FileKeyValueStore.js]: FileKeyValueStore -- setValue[2017-10-16 11:07:43.326] [INFO] Helper - Successfully loaded member from persistence[2017-10-16 11:07:43.334] [DEBUG] Helper - [crypto_ecdsa_aes]: ecdsa signature: Signature { r: <BN: e8f972a0b424c772ab360fdf4f0e3341a1d82398886cd7e93fcff87354f35f37>, s: <BN: 3ecb06de15192b6a0797e0719d2db80128b9bd1491d472b61ecb4fb3893c55c6>, recoveryParam: 0 }[2017-10-16 11:07:43.346] [DEBUG] Query - <<< channels >>>[2017-10-16 11:07:43.346] [DEBUG] Query - [ 'channel id: mychannel' ]
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- Hyperledger Fabric SDK 示例fabric-samples-《balance-transfer》之十二《查询已经加入的channel名称》
- Hyperledger Fabric SDK 示例fabric-samples-《balance-transfer》之三《加入到Channel》
- Hyperledger Fabric SDK 示例fabric-samples-《balance-transfer》之十一《查询已经安装/实例化的chaincode》
- Hyperledger Fabric SDK 示例fabric-samples-《balance-transfer》之八《查询指定的区块信息》
- Hyperledger Fabric SDK 示例fabric-samples-《balance-transfer》之九《查询指定的交易信息》
- Hyperledger Fabric SDK 示例 fabric-samples-《balance-transfer》之简介
- Hyperledger Fabric SDK 示例fabric-samples-《balance-transfer》之二《创建Channel》
- Hyperledger Fabric SDK 示例fabric-samples-《balance-transfer》之七《查询chaincode》
- Hyperledger Fabric SDK 示例fabric-samples-《balance-transfer》之十《查询链信息》
- Hyperledger Fabric SDK 示例fabric-samples-《balance-transfer》之四《安装chaincode》
- Hyperledger Fabric SDK 示例fabric-samples-《balance-transfer》之五《初始化chaincode》
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