Notes

/*eslint no-console: "error"*/
const express = require('express');
const request = require('request');
const multer = require('multer');
const objectAssign = require('object-assign');
import { graphqlExpress, graphiqlExpress } from 'apollo-server-express';
import cors from 'cors';
import mockSchema from './mock-schema';

const applicationConfig = require('./config');

const app = express();

let cookieVal;

if (!applicationConfig.isLiveAPI) {
app.use(require('body-parser').text());
}

app.locals.paymentsConfig = applicationConfig.paymentsConfig;

const dynamicEndPoints = require('glob').sync('./endpoints/**/*.js');
let dynamicEndPointMapping = {};

dynamicEndPoints.map((dEP) => {
dynamicEndPointMapping = objectAssign(dynamicEndPointMapping, require(dEP));
});

const dynamicEndPointUrls = Object.keys(dynamicEndPointMapping);

var cookieReference = '';
app.post('/s2b/bulkImport/upload', multer().single('upl'), function (req, res) {
if (req.file) {
res.json({ err: false, files: req.file });
}
});

/* service router which will handle URL's after the base url */
const service = express.Router();
service.use(function (req, res, next) {
next();
});

/* upload and storage are for mock file upload services */
const storage = multer.diskStorage({
destination: function (req, file, callback) {
callback(null, 'uploads/');
},
filename: function (req, file, callback) {
callback(null, file.fieldname + '-' + Date.now());
}
});
const upload = multer({ storage }).single('file');

/* OPTIONS requests for CORS handled here */
service.options('/*', function (req, res) {
console.log(req.get('Origin'));
res.header('Access-Control-Allow-Origin', req.get('Origin'));
res.header('Access-Control-Allow-Credentials', 'true');
res.header(
'Access-Control-Allow-Headers',
'Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With, correlationid, product, categoryid, entityid, filesize, doccode, entitytype, filedesc, filename, nounce, contentType, userid, encryptFlag, servicecontext'
);
res.header('Access-Control-Expose-Headers', 'correlationId, nounce');
res.sendStatus(200);
});

/* GET requests handler */
service.get('/*', function (req, res) {
console.log(req.get('Origin'));
/* CORS request support handled here for the post requests */
res.header('Access-Control-Allow-Origin', req.get('Origin'));
res.header('Access-Control-Allow-Credentials', 'true');
res.header(
'Access-Control-Allow-Headers',
'Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With, correlationid, product, categoryid, entityid, filesize, doccode, entitytype, filedesc, filename, nounce, contentType, encryptFlag'
);
res.header('Access-Control-Expose-Headers', 'correlationId, nounce');
console.log('Service: ' + req.url);

var splitURL = req.url.split('?');
var url = splitURL[0];
var serviceDetails =
applicationConfig.serviceConfig[url.replace(//v1.0/g, '')];
var isLiveAPIMode = applicationConfig.isLiveAPI;

if (serviceDetails) {
var isMockEnabled = serviceDetails.isMockEnabled;
var newUrl;
var port;

if (applicationConfig.mode === 'API') {
port = serviceDetails.port || '8080';
newUrl =
applicationConfig.APIBaseServerIP +
':' +
port +
'/s2b/global/corporate/api' +
req.url;
} else {
port = serviceDetails.port || '8182';
newUrl =
applicationConfig.CSLBaseServerIP +
':' +
port +
'/s2b/global/corporate/api' +
req.url;
}

console.log('New URL: ' + newUrl);

if (!isMockEnabled || isLiveAPIMode) {
console.log('in live mode');
if (req.headers['cookie']) {
var cookie = req.headers['cookie'] + '; ' + 'Path=/; secure; httponly;';
req.headers['cookie'] = cookie;
cookieReference = cookie;
}
if (isLiveAPIMode) {
req.headers['cookie'] = cookieReference;
}
req
.pipe(
request({
url: newUrl,
rejectUnauthorized: false,
headers: req.headers
})
)
.on('response', function (response) {
console.log(response.headers['set-cookie']);
if (response.headers['set-cookie']) {
var cookie = response.headers['set-cookie'][0].replace(
'secure; ',
''
);
response.headers['set-cookie'] = cookie;
console.log('inside cookie');
}
console.log('outside cookie');
res.writeHead(200, response.headers);
})
.on('error', function (err) {
if (err.errno == 'ETIMEDOUT') {
console.log('Error : Request timed out');
} else {
console.log('Error : ' + err);
}
res.sendStatus(500);
})
.pipe(res);
} else {
console.log('in mock mode');
var isFileUpload = serviceDetails.isFileUpload;
if (isFileUpload) {
console.log('File upload service');
upload(req, res, function (err) {
if (err) {
console.log(err);
return res.end('Error uploading file.');
}
res.end('File is uploaded');
console.log('File is uploaded');
});
} else {
var mockResponse = require('./mock/' + serviceDetails.mockDataSource);
if (mockResponse) {
res.send(mockResponse);
} else {
// Error logging for mock data fail should be handled here
console.log('Unable to fetch mock response data for ' + req.url);
res.sendStatus(500);
}
}
}
} else {
// Error logging for mock data fail should be handled here
console.log('Unable to find the response for ' + req.url);
res.sendStatus(500);
}
});

/* POST requests are handled here */
service.post('/*', function (req, res) {
console.log(req.get('Origin'));
/* CORS request support handled here for the post requests */
res.header('Access-Control-Allow-Origin', req.get('Origin'));
res.header('Access-Control-Allow-Credentials', 'true');
res.header(
'Access-Control-Allow-Headers',
'Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With, correlationid, product, categoryid, entityid, filesize, doccode, entitytype, filedesc, filename, nounce, contentType'
);
res.header('Access-Control-Expose-Headers', 'correlationId, nounce');
console.log('Service: ' + req.url);
var urlPath = req.url.replace(//v1.0/g, '');
var serviceDetails = applicationConfig.serviceConfig[urlPath] || {};
var containsDynamic =
req.url.includes('/search/favourites/delete') ||
req.url.includes('/search/favourites/add');
console.log(containsDynamic);

var isLiveAPIMode = applicationConfig.isLiveAPI;
if (serviceDetails || containsDynamic) {
var isMockEnabled =
applicationConfig.enableMockForAll || serviceDetails.isMockEnabled;
var newUrl;
if (applicationConfig.mode === 'API') {
let port = '8080';
newUrl =
applicationConfig.APIBaseServerIP +
':' +
port +
'/s2b/global/corporate/api' +
req.url;
} else {
let port = serviceDetails.port || '8182';
newUrl =
applicationConfig.CSLBaseServerIP +
':' +
port +
'/s2b/global/corporate/api' +
req.url;
}
console.log(newUrl);
if (!isMockEnabled || isLiveAPIMode) {
console.log('in live mode');
req.headers['cookie'] = cookieVal;
if (req.headers['cookie']) {
var cookie = req.headers['cookie'] + '; ' + 'Path=/; secure; httponly;';
req.headers['cookie'] = cookie;
cookieReference = cookie;
}
if (isLiveAPIMode) {
req.headers['cookie'] = cookieReference;
}
req
.pipe(
request({
url: newUrl,
rejectUnauthorized: false
})
)
.on('response', function (response) {
console.log(response.headers['set-cookie']);
if (response.headers['set-cookie']) {
let cookie = '';
response.headers['set-cookie'].forEach((value) => {
cookie += value.substr(0, value.indexOf(';') + 1);
});
cookieVal = cookie;
console.log('inside cookie');
}
console.log('outside cookie');
res.writeHead(200, response.headers);
})
.on('error', function (err) {
if (err.errno == 'ETIMEDOUT') {
console.log('Error : Request timed out');
} else {
console.log('Error : ' + err);
}
res.sendStatus(500);
})
.pipe(res);
} else {
console.log('in mock mode');
var isFileUpload = serviceDetails.isFileUpload;
if (isFileUpload) {
console.log('File upload service');
upload(req, res, function (err) {
if (err) {
console.log(err);
return res.end('Error uploading file.');
}
res.end('File is uploaded');
console.log('File is uploaded');
});
} else {
if (dynamicEndPointUrls.includes(urlPath)) {
return dynamicEndPointMapping[urlPath](req, res);
}
var mockResponse = require('./mock/' + serviceDetails.mockDataSource);
if (mockResponse) {
res.send(mockResponse);
} else {
// Error logging for mock data fail should be handled here
console.log('Unable to fetch mock response data for ' + req.url);
res.sendStatus(500);
}
}
}
} else {
// Error logging for mock data fail should be handled here
console.log('Unable to find the response for ' + req.url);
res.sendStatus(500);
}
});
/* Base url of the server after which it is routed to the service router */
app.use('/s2b/global/corporate/api', service);
app.use(cors());
if (process.env.RUN_SERVER_IN_MOCK_MODE) {
app.use(
'/s2b/global/corporate/graphql',
require('body-parser').json(),
graphqlExpress({ schema: mockSchema })
);
app.use(
'/s2b/global/corporate/graphiql',
graphiqlExpress({ endpointURL: '/s2b/global/corporate/graphql' })
);
}
/* else {
app.all('/s2b/global/corporate/graphql', (req, res) => {
res.send('Back end graphQL is still being implemented.');
});
app.all('/s2b/global/corporate/graphiql', (req, res) => {
res.send('Back end graphQL is still being implemented.');
});
}*/

app.listen(4201, function () {
console.log('server started on port 4201');
});