Understanding HTTP Response Codes
HTTP response codes are essential for understanding the status of a web request. When a client, such as a web browser, makes a request to a server, the server responds with a response code that indicates the result of that request. These codes are crucial for diagnosing issues, ensuring the correct functionality of web applications, and optimizing user experience.
Categories of HTTP Response Codes
HTTP response codes can be divided into five categories, each representing different types of responses. Understanding these categories is essential for effectively using the check_http_response_code
tool.
- 1xx (Informational): These codes indicate that the request has been received and is being processed.
- 2xx (Success): This category signifies that the request was successfully received, understood, and accepted. For example, the code
200 OK
indicates that the request has succeeded.
- 3xx (Redirection): These codes indicate that further action is required to complete the request. For instance,
301 Moved Permanently
tells the client that the requested resource has been permanently moved to a new URL.
- 4xx (Client Error): This category indicates that there was an error with the request from the client’s side. A common example is
404 Not Found
, which means the requested resource could not be found on the server.
- 5xx (Server Error): These codes indicate that the server failed to fulfill a valid request. For example,
500 Internal Server Error
means that the server encountered an unexpected condition that prevented it from fulfilling the request.
Key server response headers
Common HTTP response headers and their meanings.
Content-Type
Defines the format of the transmitted content, required for correct display in the browser.
Accept-Encoding
List of supported content compression methods.
Date
The date and time the server response was generated.
Expires
The time after which the content becomes outdated.
Last-Modified
The date of the last content update.
If-Modified-Since
The date after which only updated content is loaded.
Location
The URL for redirection or the new resource address.
Server
Information about the web server, its version, and installed components.
Responses to Commonly Asked Questions
Take a look at the list of frequently asked questions – you might discover the answer you are looking for.
Input the page URL, choose the If-Modified-Since option, and indicate the date of your last visit. If the response header is HTTP/1.1 304 Not Modified
rather than HTTP/1.1 200 OK
, it indicates that the server supports If-Modified-Since and will only provide the content if it has been altered since your last visit.
By default, httpstatuscodes utilizes your current User-Agent. If you wish to modify it, you can choose a different one from the dropdown menu.
Input the page URL and choose Accept-Encoding: gzip. If the server's response includes the header Content-Encoding: gzip, it indicates that compression is enabled.
Indeed, the service is compatible with IDN domains. You don't need to convert them to punycode – simply input the Cyrillic domain address and verify the server's HTTP response.
Indeed, httpstatuscodes automatically tracks redirects and examines the subsequent page indicated in the <Location>
header. It can handle up to 7 successive redirects, showing the headers that were sent and received at each stage.
Indeed, httpstatuscodes functions flawlessly on mobile devices, loads swiftly, and is user-friendly.