#compsci The are 5 [[HTTP]] status classes defined by the standard: ![[Pasted image 20250312195549.png]] ## 1xx | Numeric | Name | Description | | ------- | ------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | 100 | Continue | The server has received the request headers and the client should proceed to send the request body | | 101 | Switching Protocols | The requester has asked the server to switch protocols and the server has agreed to do so | | 102 | Processing | A WebDAV request may contain many sub-requests involving file operations, requiring a long time to complete the request. Code indicates the server has received and is processing the request | | 103 | Early Hints | Used to return some response headers before final HTTP message | ## 2xx | Numeric | Name | Description | | ------- | ----------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------- | | 200 | OK | Standard response for sucessful HTTP requests, actual response will depend on the request method used | | 201 | Created | Request fulfilled, new resource created | | 202 | Accepted | Request accepted for processing, processing hasn't been completed | | 203 | Non-Authoritative Information | The server is a transforming proxy that received a 200 from its origin, but its returning a modified version of the origin's response | | 204 | No Content | Request successfully processed, no content returned | | 205 | Reset Content | Request successfully processed, server asks the requester to rest its document view, not returning any content | | 206 | Partial Content | Only part of the resource delivered due to a range header sent by the client | | 207 | Multi-Status | Message body is an XML message and can contain a number of separate response codes | | 208 | Already Reported | Members of a DAV binding have already been enumerated in a part of the multistatus response, not being included again | | 226 | IM Used | Server has fulfilled a request for the resource, response is a representation of the result of one or more instance-manipulations applied to the current instance | ## 3xx | Numeric | Name | Description | | ------- | ------------------------- | --------------------------------------------------------------------------------------------------- | | 300 | Multiple Choices | Indicates multiple options for the resource from which the client may choose | | 301 | Moved Permanently | URL changed, new URL is given in the response | | 302 | Found | URL changed temporarily, | | 303 | See Other | Response to the request can be found under another link using GET method | | 304 | Not Modified | Resource hasn't been modified since the version specified by request headers | | 305 | Use Proxy (deprecated) | Requested resource is available only through a proxy, address for which is provided in the response | | 306 | Switch Proxy (deprecated) | Originally meant "Subsequent requests should use the specified proxy" | | 307 | Temporary Redirect | Similar to 302, except that the user agent mustn't change the HTTP method used | | 308 | Permanent Redirect | Similar to 301, except that the user agent mustn't change the HTTP method used | ## 4xx | Numeric | Name | Description | | ------- | ------------------------------- | ------------------------------------------------------------------------------------------------------------------- | | 400 | Bad Request | Server can't or won't process the request due to an apparent client error | | 401 | Unauthorized | Server won't process the request until the client authorizes | | 402 | Payment Required | Initial purpose for digital payment system, rarely used and no standard convention exists | | 403 | Forbidden | ACCESS DENIED (client's identity is known to the server) | | 404 | Not Found | Server can't find the requested resource | | 405 | Method Not Allowed | Request method known, not supported by target resource | | 406 | Not Acceptable | Server didn't find any content that conforms to the criteria given by the user agent | | 407 | Proxy Authentication Required | Similar to 401, but authentication is needed to be done by a proxy | | 408 | Request Timeout | Server timed out waiting for the request | | 409 | Conflict | Sent when a request conflicts with the current state of the server | | 410 | Gone | The resource requested is no longer available and will not be available again | | 411 | Lewngth Required | Request didn't specify the length of its content, and that was required | | 412 | Precondition Failed | Server doesn't meet one of the preconditions that the requester put on the request header fields | | 413 | Payload Too Large | The request is larger than the server is willing or able to process | | 414 | URI Too Long | URI provided was too long for the server to process | | 415 | Unsupported Media Type | The request entity has a media type which the serrver or resource doesn't support | | 416 | Range Not Satisfiable | Client asked for a portion of the file, but the server can't supply that portion | | 417 | Expectation Failed | Server can't meet the requirements of the Expect request-header field | | 418 | I'm a teapot | Joke when teapots are requests to brew coffee | | 421 | Misdirected Request | Request was directed at a server that is not able to produce a response | | 422 | Unprocessable content | Request was well-formed, couldn't be processed | | 423 | Locked | The resource that is being accessed is locked | | 424 | Failed Dependency | The request failed because it depended on another request and that request failed | | 425 | Too early | Indicates that the server is unwilling to risk processing a request that might be replayed | | 426 | Upgrade Required | The client should switch to a different protocol | | 428 | Precondition Required | Origin server requires the request to be conditional | | 429 | Too Many Requests | User has sent too many requests in a given amount of time | | 431 | Request Header Fields Too Large | Server won't process the request because one or more of the requests header fields are too large | | 451 | Unavailable For Legal Reasons | Server operator has received a legal demand to deny access to a resource, reference to the novel [[Fahrenheit 451]] | ## 5xx | Numeric | Name | Description | | ------- | ------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------- | | 500 | Internal Server Error | Generic server error | | 501 | Not Implemented | Either the server doesn't recognize the request method, or it lacks the ability to fulfill the request | | 502 | Bad Gateway | The server was acting as a gateway or proxy and received an invalid response from the upstream server | | 503 | Service Unavailable | Server can't handle the request (overloaded or down for maintenance), generally temporary | | 504 | Gateway Timeout | Server was acting as a gateway or proxy and didn't receive a timely response from the upstream sersver | | 505 | HTTP Version Not Supported | Server doesn't support the HTTP version used in the request | | 506 | Variant Also Negotiates | During content negotiatin, the chosen variant is configured to engage in content negotiation itself, circular refernces cuz of that | | 507 | Insufficient Storage | Server ran out of storage | | 508 | Loop Detected | Server detected an infinite loop while processing the request | | 510 | Not Extended | Further extensions to the request are required for the server to fuilfil it | | 511 | Network Authentication Required | The client needs to authenticate to gain network access, intended for use by e.g. captive portals |