decrypting…# 🌐 HTTP Response Codes Cheat Sheet #CS #networking #logs A complete guide to HTTP response codes categorized by their status class. 📡 Use this cheat sheet to understand the meaning and purpose of each HTTP response code! 🚀 --- ## 📋 Categories of HTTP Response Codes ### 🔵 1XX: Informational Responses These codes indicate that the server has received the request and is continuing the process. | **Code** | **Name** | **Description** | |----------|---------------------------|-------------------------------------------------------------------| | 100 | Continue | Client should continue with its request. | | 101 | Switching Protocols | Server is switching protocols as requested by the client. | | 102 | Processing (WebDAV) | Server has received and is processing the request. | | 103 | Early Hints | Provides early response headers to preload resources. | --- ### 🟢 2XX: Successful Responses The client’s request was successfully received, understood, and accepted. | **Code** | **Name** | **Description** | |----------|---------------------------|-------------------------------------------------------------------| | 200 | OK | Standard success response. | | 201 | Created | Resource has been successfully created. | | 202 | Accepted | Request has been accepted for processing but is not completed. | | 203 | Non-Authoritative Information | Returned metadata is not from the origin server. | | 204 | No Content | Request succeeded but no content is being returned. | | 205 | Reset Content | Instructs the client to reset the document view. | | 206 | Partial Content | Only part of the resource is being delivered. | | 207 | Multi-Status (WebDAV) | Provides multiple independent response codes. | | 208 | Already Reported (WebDAV) | Elements have already been reported in a previous response. | | 226 | IM Used | Server has fulfilled a GET request for the resource. | --- ### 🟡 3XX: Redirection Responses The client must take additional action to complete the request. | **Code** | **Name** | **Description** | |----------|---------------------------|-------------------------------------------------------------------| | 300 | Multiple Choices | Multiple options for the resource are available. | | 301 | Moved Permanently | The resource has been permanently moved to a new URL. | | 302 | Found | The resource is temporarily under a different URL. | | 303 | See Other | Redirects the client to a different URI. | | 304 | Not Modified | Indicates cached resource is still valid. | | 305 | Use Proxy | Resource must be accessed through a proxy. | | 307 | Temporary Redirect | Request should be repeated with another URI. | | 308 | Permanent Redirect | Permanent redirect using the current HTTP method. | --- ### 🔴 4XX: Client Errors The client seems to have made an error in the request. | **Code** | **Name** | **Description** | |----------|---------------------------|-------------------------------------------------------------------| | 400 | Bad Request | Server cannot process the request due to client error. | | 401 | Unauthorized | Authentication is required and has failed or not been provided. | | 402 | Payment Required | Reserved for future use. | | 403 | Forbidden | Server understands the request but refuses to authorize it. | | 404 | Not Found | Requested resource could not be found. | | 405 | Method Not Allowed | HTTP method is not allowed for the resource. | | 406 | Not Acceptable | Requested resource is not acceptable as per client headers. | | 407 | Proxy Authentication Required | Client must authenticate with a proxy. | | 408 | Request Timeout | Server timed out waiting for the request. | | 409 | Conflict | Request conflicts with the server's current state. | | 410 | Gone | Requested resource is no longer available. | | 411 | Length Required | Server requires a valid Content-Length header. | | 412 | Precondition Failed | One or more preconditions in headers failed. | | 413 | Payload Too Large | Request payload is larger than the server is willing to process.| | 414 | URI Too Long | Requested URI is too long for the server to process. | | 415 | Unsupported Media Type | Media format of the requested data is not supported. | | 416 | Range Not Satisfiable | Range specified in the request header is not satisfiable. | | 417 | Expectation Failed | Server cannot meet the requirements of the Expect header. | | 418 | I'm a Teapot | Joke response (RFC 2324). | | 422 | Unprocessable Entity (WebDAV) | Request was well-formed but cannot be processed. | | 429 | Too Many Requests | Client has sent too many requests in a given time. | --- ### 🛑 5XX: Server Errors The server failed to fulfill a valid request due to an error. | **Code** | **Name** | **Description** | |----------|---------------------------|-------------------------------------------------------------------| | 500 | Internal Server Error | Generic error message for unexpected server issues. | | 501 | Not Implemented | Server does not support the requested functionality. | | 502 | Bad Gateway | Received an invalid response from an upstream server. | | 503 | Service Unavailable | Server is currently unable to handle the request. | | 504 | Gateway Timeout | Upstream server failed to send a request in time. | | 505 | HTTP Version Not Supported| Server does not support the HTTP protocol version used. | | 507 | Insufficient Storage (WebDAV) | Server is unable to store the representation. | | 511 | Network Authentication Required | Client must authenticate to gain network access. | --- ## 💡 Pro Tips 1. **Know Your Codes**: Understand the different categories to debug and resolve issues effectively. 2. **Use Tools**: Tools like `Postman` or browser developer tools can help analyze HTTP response codes. 3. **Monitor Redirects**: Pay attention to `3XX` codes to avoid redirect loops. HTTP response codes are essential for debugging, monitoring, and optimizing your web applications. Keep this cheat sheet handy to stay ahead! 🚀