HTTP Method 에 대하여 알아보기

What is HTTP Method?

HTTP stands for Hypertext Transfer Protocol, which is a protocol used to transfer data over the internet. HTTP methods are the actions that a client can perform on a server. These methods are also known as HTTP verbs or HTTP request methods. In this article, we will discuss the different types of HTTP methods and their functionalities.

HTTP Methods

There are several HTTP methods available, but the most commonly used methods are:

• GET
• POST
• PUT
• DELETE

GET

The GET method is used to retrieve data from the server. When a client sends a GET request to the server, the server responds with the requested data. The GET method is idempotent, which means that multiple requests to the same resource will return the same response.

POST

The POST method is used to submit data to the server. When a client sends a POST request to the server, the server processes the data and sends a response back to the client. The POST method is not idempotent, which means that multiple requests to the same resource may result in different responses.

PUT

The PUT method is used to update data on the server. When a client sends a PUT request to the server, the server updates the data and sends a response back to the client. The PUT method is idempotent, which means that multiple requests to the same resource will result in the same response.

DELETE

The DELETE method is used to delete data from the server. When a client sends a DELETE request to the server, the server deletes the data and sends a response back to the client. The DELETE method is idempotent, which means that multiple requests to the same resource will result in the same response.

HTTP Status Codes

HTTP status codes are three-digit codes that are returned by the server in response to a client request. These codes indicate the status of the request and the response. There are several HTTP status codes available, but the most commonly used codes are:

• 200 OK
• 201 Created
• 400 Bad Request
• 401 Unauthorized
• 403 Forbidden
• 404 Not Found
• 500 Internal Server Error

200 OK

The 200 OK status code indicates that the request was successful, and the server has returned the requested data.

201 Created

The 201 Created status code indicates that the request was successful, and the server has created a new resource.

400 Bad Request

The 400 Bad Request status code indicates that the request was malformed or invalid.

401 Unauthorized

The 401 Unauthorized status code indicates that the client is not authorized to access the requested resource.

403 Forbidden

The 403 Forbidden status code indicates that the client is authenticated, but does not have the necessary permissions to access the requested resource.

404 Not Found

The 404 Not Found status code indicates that the requested resource could not be found on the server.

500 Internal Server Error

The 500 Internal Server Error status code indicates that the server encountered an error while processing the request.

Conclusion

HTTP methods and status codes are essential concepts in web development. Understanding these concepts will help you build better web applications and troubleshoot issues more effectively. In summary, HTTP methods are the actions that a client can perform on a server, and HTTP status codes indicate the status of the request and the response.

Code Example

Here is an example of a GET request using the Python requests library:

import requests  response = requests.get('https://jsonplaceholder.typicode.com/posts/1') print(response.status_code) print(response.json()) 

In this example, we are sending a GET request to the JSONPlaceholder API to retrieve a post with an ID of 1. The response object contains the server's response, which includes the status code and the requested data in JSON format.