How to Specify statusCode in Node.js

What is HTTP response status codes?

HTTP response status codes allow us to know whether a specific HTTP request has been successfully completed. There are five main classes of response

1. Informational responses (1xx) — request has been received and the process is continuing.
2. Successful responses (2xx) — action was successfully received, understood, and accepted.
3. Redirects (3xx) — further action must be taken in order to complete the request.
4. Client errors (4xx) — request contains incorrect syntax or cannot be fulfilled.
5. Server errors (5xx) — server failed to fulfill an apparently valid request.

The followings are some common ones

1. 200 — everything is OK, the meaning of OK depends on the methods
   GET: The resource has been fetched and is transmitted in the message body.
   HEAD: The entity headers are in the message body.
   PUT or POST: The resource describing the result of the action is transmitted in the message body.
   TRACE: The message body contains the request message as received by the server.
2. 404 — it means the file not found, which mean the URL is not recognized.
3. 505 — some kind of internal server error and it does not know how to handle.

Complete Node.js articles:

Part 1: How to create a HTTP server in Node.js