RakkoTools

HTTP Header Lookup

Lookup the HTTP response headers sent out by the web server

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What this tool can

HTTP Header Lookup tool allow you to inspect the HTTP headers that the web server returns when requesting a URL. In the response headers, you can view the HTTP status code, web server in use, date, content type, content encoding, and other useful information. This tool can also work with HTTPS and HTTP URLs.

The meaning of HTTP status code:

The status code is one of the most important pieces of information you will receive. The full list of status codes in use is long, but here are the more common ones:

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 and can help you avoid a broken link later on.
302 Found:Content is located at the URL specified in the Location header. This is temporary.
303 See other:Content is located at the URL specified in the Location header. It should be retrieved using a GET method.
307 Temporary redirect:Content is located at the URL specified in the Location header. Continue to use the current URL.
401 Unauthorized:Authentication is required to access the content. 403 Forbidden:Access isn’t allowed.
404 Not found:Resource couldn’t be found. The other headers or the returned content may provide additional information.
405 Method not allowed:The URL doesn’t accept the specified HTTP method, which in our case is always GET. The Allow header will list the accepted methods.
410 Gone:Like 404, but with more finality. Not only is the content unavailable, but there’s also no known forwarding address.
500 Internal server error:There’s an issue with the web server, and your request wasn’t handled.
503 Service unavailable:The URL is temporarily unavailable.

Useful for

・Check if your website is accessible.
・Check name of your web server.
・Show redirects on web server in use, if have. (Example: you provide example.com and get redirected to www.example.com by web server)
・Check current date on your web server.
・Check format of the data being returned from your web server. For example, Content-Type: text/html; charset=UTF-8
・Check type of encodes the data being returned from your web server. For example, if a web server uses gzip for compression, you’ll get back Content-Encoding: gzip

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