- Port number 80
- Responsible for the communication between web server and clients
- It is stateless (every request is independent)
- It is inband
What is HTTPS ?
- It is called Hyper Text Transport Protocol Secure
- It is basically where all the data sent back and forth is encrypted by SSL (Secure Sockets Layer) or TLS (Transport Security Layer)
HTTP Methods
GET
- Use to get data from server (retrieving the information)
- Eg: loading standard html page, loading assets like css or images, json data, xml data, etc.
POST
- Used to posting data or adding a resource to server
- Like a contact form, or a blog post, etc.
PUT
- Used to update data on a server
- Edit blog post or image
DELETE
- Deletes the data from server
General
- Request URL
- Request Method
- Status Code
- Remote Address
- Referrer Policy
Response
- Server
- Set-Cookie
- Content-Type
- Content-Length
- Date
Request
- Cookies
- Accept-xxx
- Content-Type
- Content-Length
- Authorization
- User-Agent
- Referrer
Status Codes
- Request received / processing
2xx : Success
- Successfully received, understood and accepted
3xx : Redirect
- Further action must be taken / redirect
4xx : Client Error
- Request does not have what it needs
5xx : Server Error
- Server failed to fulfil an apparent valid request
Requests and Response
- Communication between clients and servers is done through Request and Response
- A client (a browser) sends an HTTP request to the web
- A web server receives the request
- The server runs an application to process the request
- The server returns an HTTP response (output) to the browser
- The client (the browser) receives the response