HTTP Status Codes

Introduction

We are going to discuss HTTP Status Codes in this article. HTTP Status codes help us to identify website errors quickly.

We will discuss,

1. What is HTTP Status Codes
2. Important HTTP Status codes

• 1.xxs: Information
• 2.xxs: Success
• 3.xxs: Redirection
• 4.xxs: Client error
• 5.xxs: Server error

What are HTTP Status Codes?

Let’s see the below image first and then we will discuss more about HTTP Status Codes.

Whenever the user tries to access your website, the browser sends a request to the server. The server processes the request and response with a three-digit code. That code is called the HTTP Status Code.

This HTTP Status Code gives status about conversion between browse and server and indicates success, failure, and other statuses.

I hope you got a basic idea about HTTP Status Codes.

Let’s discuss some important HTTP Status Codes.

HTTP Status Codes have five important categories,

• 1xxs – Informational:
• 2xxs – Success: Request completed and expected response given to the browser from Server.
• 3xxs – Redirection: The server received the request, but it was redirected somewhere else.
• 4xxs – Client error: The client seems to have an error or Page not found.
• 5xxs – Server errors: A valid request from the client, but it failed at the server.

Let’s discuss all of it in detail,

There are many HTTP Status codes available in each section, but we will cover important HTTP Status codes only.

1.xxs: Information Response

It informs the client that the request is continuing.

HTTP Status Code	Details	What HTTP Status Code Indicates
100	Continue	HTTP session is in progress as expected, and asking the client to continue to the next step. The HTTP response is only sent when the client includes the HTTP header request field Expect.
101	Switching Protocols	HTTP session can continue, and the server is switching to the new protocol. The HTTP response is only sent when the client includes the HTTP header request field “Urgrade” or “Connction Upgrade”.
102	Processing	Significant delay in the HTTP Response, so inform the client not to timeout early.

2xxs – Success
 

HTTP Status Code	Details	What HTTP Status Code Indicates
200	OK	Indicate Successfully completed.
201	Created	It indicates that the Resource was successfully created by the HTTP request.
202	Accepted	HTTP Request has been received successfully, but processing is not yet completed.
204	No Content	HTTP request has been successfully completed, and there is no message body.

3xxs – Redirection

This HTTP Status code indicates errors related to redirection and resource unavailability.

HTTP Status Code	Details	What HTTP Status Code Indicates
300	Multiple Choices	Indicate that more than one HTTP Response is available for an HTTP Request. The Client has to decide which best fits their requirements.
301	Moved Permanently	Indicates that requested resources have been given a new permanent location.
302	Temporary Redirect	Indicate that requested resources have temporarily moved to the new location.

4xxs – Client error

These HTTP Status codes indicate client-side issues.

HTTP Status Code	Details	What HTTP Status Code Indicates
400	Bad Request	Indicate that the client did something wrong.
401	Unauthorized	Indicate that a valid login credential needs to be supplied to access resources. HTTP must be authenticated.
403	Forbidden	Indicate that the client doesn’t have sufficient permission to access the resources.
404	Not Found	Indicate that the resource cannot be found at the specific address.
429	Too Many Requests	Indicates that too many requests were made in the allowed time.

5xxs – Server errors

This HTTP status code indicates that there is an error on the server side. Let's look at some important HTTP status codes.

HTTP Status Code	Details	What HTTP Status Code Indicates
500	Internal Server Error	Indicate generic error on the server Side.
501	Not Implemented	Indicate it does not support a specific feature that is mandatory to complete the request.
502	Bad Gateway	In this case, it acts as a proxy/Gateway and has received an invalid response from the upstream system.
503	Service Unavailable	Indicate that the page or resources are not available. It shows the temporary problem.
504	Gateway Timeout	Indicate that there is no response from the upstream system, and it acts as a gateway/proxy.

I hope you like and enjoy this article.