Common HTTP Error Codes

While accessing the Internet, we all have came through some common errors while page loading or information access. These errors are not user friendly and usually has a status code in the form of a number associated with them. Every thought what that numeric code value means? Well, here I will be defining some of the most common HTTP status error codes that might have experienced at least once in your lifetime while accessing a website. These are:

Client Errors:

• 400 (Bad Request): The 400 status code, or Bad Request error, means the HTTP request that was sent to the server has invalid syntax.
• 401 (Unauthorized): The 401 status code, or an Unauthorized error, means that the user trying to access the resource has not been authenticated or has not been authenticated correctly. This means that the user must provide credentials to be able to view the protected resource.
• 403 (Forbidden): The 403 status code, or a Forbidden error, means that the user made a valid request but the server is refusing to serve the request, due to a lack of permission to access the requested resource.
• 404 (Not Found): The 404 status code, or a Not Found error, means that the user is able to communicate with the server but it is unable to locate the requested file or resource.
  

Server Errors: 

• 500 (Internal Server Error): The 500 status code, or Internal Server Error, means that server cannot process the request for an unknown reason
• 502 (Bad Gateway): The 502 status code, or Bad Gateway error, means that the server is a gateway or proxy server, and it is not receiving a valid response from the backend servers that should actually fulfill the request.
• 503 (Service Unavailable): The 503 status code, or Service Unavailable error, means that the server is overloaded or under maintenance. This error implies that the service should become available at some point.
• 504 (Gateway Timeout): The 504 status code, or Gateway Timeout error, means that the server is a gateway or proxy server, and it is not receiving a response from the backend servers within the allowed time period. 

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