server.js

// ExpressJS Setup
var express = require('express');
var app = express();
app.set('view engine', 'ejs');
var bodyParser = require('body-parser');
const session = require('express-session');
app.use(session({secret: 'ssshhhhh',saveUninitialized: true,resave: true}));

var sess;


// Constants
const PORT = 8080;
const HOST = 'localhost';


 // Hyperledger Bridge
var Fabric_Client = require('fabric-client');
var path = require('path');
var util = require('util');
var os = require('os');

//

var fabric_client = new Fabric_Client();

// setup the fabric network
var channel = fabric_client.newChannel('mychannel');
var peer = fabric_client.newPeer('grpc://localhost:7051');
channel.addPeer(peer);

//
var member_user = null;
var store_path = path.join(__dirname, 'hfc-key-store');
console.log('Store path:'+store_path);
var tx_id = null;

//Attach the middleware
//app.use( bodyParser.json() );
app.get('', function (req, res) {
		// create the key value store as defined in the fabric-client/config/default.json 'key-value-store' setting
		Fabric_Client.newDefaultKeyValueStore({ path: store_path
		}).then((state_store) => {
			// assign the store to the fabric client
			fabric_client.setStateStore(state_store);
			var crypto_suite = Fabric_Client.newCryptoSuite();
			// use the same location for the state store (where the users' certificate are kept)
			// and the crypto store (where the users' keys are kept)
			var crypto_store = Fabric_Client.newCryptoKeyStore({path: store_path});
			crypto_suite.setCryptoKeyStore(crypto_store);
			fabric_client.setCryptoSuite(crypto_suite);

			// get the enrolled user from persistence, this user will sign all requests
			return fabric_client.getUserContext('user1', true);
		}).then((user_from_store) => {
			if (user_from_store && user_from_store.isEnrolled()) {
				console.log('Successfully loaded user1 from persistence');
				member_user = user_from_store;
			} else {
				throw new Error('Failed to get user1.... run registerUser.js');
			}

			// queryCar chaincode function - requires 1 argument, ex: args: ['CAR4'],
			// queryAllCars chaincode function - requires no arguments , ex: args: [''],
			const request = {
				//targets : --- letting this default to the peers assigned to the channel
				chaincodeId: 'fabcar',
				fcn: 'queryAllCars',
				args: ['']
			};
			// send the query proposal to the peer
			return channel.queryByChaincode(request);
		}).then((query_responses) => {
			console.log("Query has completed, checking results");
			console.log(query_responses);
		        // query_responses could have more than one  results if there multiple peers were used as targets
			if (query_responses && query_responses.length == 1) {
				if (query_responses[0] instanceof Error) {
					console.error("error from query = ", query_responses[0]);
				} else {
					console.log("Response is ", query_responses[0].toString());
				    
					var check = query_responses[req.query.name];
					res.render('user', { name:check});
				
				
				}
			} else {
				console.log("No payloads were returned from query");
			}
			res.status(200).json({response: query_responses[0].toString()});
			
		}).catch(function(err) {
		    res.status(500).json({error: err.toString()})
		  })
});
app.listen(PORT, HOST);
console.log(`Running on http://${HOST}:${PORT}`);