Unhandled rejection RequestError: Error: getaddrinfo ENOTFOUND http http:80

[abdul745]

In nodejs, While creating an instance of monero-wallet using following code and my own server details where the program is running:

var moneroWallet = require('/home/server/auth/monero-nodejs/lib/wallet.js');
var mWallet = new moneroWallet( hostName, port);

I am getting the following error:
Unhandled rejection RequestError: Error: getaddrinfo ENOTFOUND http http:80
at new RequestError (/home/server/node_modules/request-promise-core/lib/errors.js:14:15)
at Request.plumbing.callback (/home/server/node_modules/request-promise-core/lib/plumbing.js:87:29)
at Request.RP$callback [as _callback] (/home/server/node_modules/request-promise-core/lib/plumbing.js:46:31)
at self.callback (/home/server/node_modules/request/request.js:185:22)
at Request.emit (events.js:198:13)
at Request.onRequestError (/home/server/node_modules/request/request.js:877:8)
at ClientRequest.emit (events.js:198:13)
at Socket.socketErrorListener (_http_client.js:401:9)
at Socket.emit (events.js:198:13)
at emitErrorNT (internal/streams/destroy.js:91:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:59:3)
at process._tickCallback (internal/process/next_tick.js:63:19)

Anyone knows the problem?