Source : SCN Post
How internet works:
- Your request a URL using web browser.
- Web browser sends your request to the web server using HTTP. ( HTTP defines the semantics of what the browser and web server can communicate to each other ).
- Web server then sends back HTTP response to your browser. (HTTP is stateless because, every single request received by the server is forgotten after a response has been sent across. web servers do not process HTTP requests by remembering the previous request).
- Browser parsed that HTTP response and prepare a DOM tree. DOM stands for document object model and it is a language independent convention for representing objects in HTML.
URI vs URL:
GET and POST Methods :
- When you type a string in google search page and press enter, it actually generates a HTTP request with GET method in background. (Retrieve information from server)
- When you login to some web page using username and password and press enter, it actually generates a HTTP request with POST method in background. (send data to server)
HTTP Response:
- HTTP response comes with data and a status code.
How internet works:
- Your request a URL using web browser.
- Web browser sends your request to the web server using HTTP. ( HTTP defines the semantics of what the browser and web server can communicate to each other ).
- Web server then sends back HTTP response to your browser. (HTTP is stateless because, every single request received by the server is forgotten after a response has been sent across. web servers do not process HTTP requests by remembering the previous request).
- Browser parsed that HTTP response and prepare a DOM tree. DOM stands for document object model and it is a language independent convention for representing objects in HTML.
URI vs URL:
GET and POST Methods :
- When you type a string in google search page and press enter, it actually generates a HTTP request with GET method in background. (Retrieve information from server)
- When you login to some web page using username and password and press enter, it actually generates a HTTP request with POST method in background. (send data to server)
HTTP Response:
- HTTP response comes with data and a status code.
- HTTP codes are 3 digit integers.
Code and Description
|
1xx: Informational
It means the request has been received and the process is continuing.
|
2xx: Success
It means the action was successfully received, understood, and accepted.
|
3xx: Redirection
It means further action must be taken in order to complete the request.
|
4xx: Client Error
It means the request contains incorrect syntax or cannot be fulfilled.
|
5xx: Server Error
It means the server failed to fulfill an apparently valid request.
|
For example, status code 400 means Bad Request. It means that the server did not understand the request.
