HTTP Header Lookup

The common HTTP status code:

• 200 OK:The request was successful, and the response includes the requested content.
• 301: Moved Permanently: The requested content is at another URL (specified in the Location header). Replacing the link with the new URL will improve performance.
• 302: Found: Content is temporarily located at the URL specified in the Location header.
• 303: See other: Content is located at the URL specified in the Location header. It has to be retrieved by using a GET method.
• 307: Temporary Redirect:Content is temporarily located at the URL specified in the Location header.
• 401: Unauthorized:Authentication is required to access the content.
• 403 Forbidden: Access is forbidden.
• 404: Not found:Resource was not found, or you do not have access to it.
• 405: Method not allowed: The specified HTTP method is not allowed to use. The Allow header will show the methods that you can use.
• 410: Gone:This is similar to 404, but used only when resource will not be found for good. The content is not only unavailable, but also the forwarding address is not specified.
• 500: Internal server error: There is a problem with the web server, and your request was not handled.
• 503: Service unavailable:The URL is temporarily unavailable.(Because of the overload or the maintenance)

• Checking whether your website is accessible when deploying to server.
• Confirming the settings while building or configuring a web server, such as server’s name, redirects, format/type of encodes when data is being returned,the settings of current date on the webserver.