HTTP-статусы
Пользователи могут сталкиваться с ошибками при отправке запросов на сервер. Вы, вероятно, часто видели эти сообщения.
Здесь вы можете найти список кодов состояния ответа Hypertext Transfer Protocol (HTTP). Эти коды используются для ответа на запрос клиента, отправленный на сервер. Существует 5 классов кодов состояния ответа HTTP. Давайте рассмотрим каждый класс:
DANGER
Если вы получаете ответ, которого нет в этом списке, это означает, что это нестандартный ответ, возможно, специфичный для программного обеспечения сервера.
1xx: Информационные
| Код состояния | Сообщение | Описание |
|---|---|---|
| 100 | Continue | Means that the server has received request headers and the client should continue to send request body. |
| 101 | Switching Protocols | Means that the client, who made a request, has asked the server to change protocols. |
| 103 | Checkpoint | Means that it is used in the resumable requests proposal to resume aborted PUT or POST requests. |
2xx: Успешные
| Код состояния | Сообщение | Описание |
|---|---|---|
| 200 | OK | Means that the request is OK. It is standard response for successful HTTP requests. |
| 201 | Created | Means that the request has been fulfilled and a new resource is created. |
| 202 | Accepted | Means that the request has been accepted for processing, but the processing is going on. |
| 203 | Non-Authoritative Information | Means that the request has been successfully processed, but it is returning information which may be from another source. |
| 204 | No Content | Means that the request has been successfully processed, but it is not giving any content. |
| 205 | Reset Content | Means that the request has been processed, but it is not returning any content and it requires that the requester reset the document view. |
| 206 | Partial Content | Means that the server commits only a part of the resource, because of a range header, which was sent by the client. |
3xx: Перенаправление
| Код состояния | Сообщение | Описание |
|---|---|---|
| 300 | Multiple Choices | Indicates multiple options for the resource that the client may follow. |
| 301 | Moved Permanently | Means that the page has been moved to a new URL. |
| 302 | Found | Means that the requested page has been moved to a new URL temporarily. |
| 303 | See Other | Means that the requested page can be found in another URL. |
| 304 | Not Modified | Means that the requested page hasn't been modified since the last request. |
| 306 | Switch Proxy | Is not used anymore. |
| 307 | Temporary Redirect | Means that the requested page has been moved to a new URL temporarily. |
| 308 | Permanent Redirect | Means that the requested resource has been permanently moved to a new URL. |
4xx: Ошибка клиента
| Код состояния | Сообщение | Описание |
|---|---|---|
| 400 | Bad Request | Means that the request cannot be fulfilled due to bad syntax. |
| 401 | Unauthorized | Means that the request was valid, but the server refuses to respond. Used when authentication is required and has failed or has not yet been provided. |
| 402 | Payment Required | Is reserved for a future use. |
| 403 | Forbidden | Means that the request is valid, but the server refuses to respond. |
| 404 | Not Found | Means that the requested page cannot be found at the moment, but it may be available again in the future. |
| 405 | Method Not Allowed | Means that the request was made of a page that uses an unsupported request method for that page. |
| 406 | Not Acceptable | Means that the server can only generate an answer which the client doesn't accept. |
| 407 | Proxy Authentication Required | Means that the client first authenticate itself with the proxy. |
| 408 | Request Timeout | Means that the server timed out waiting for the request. |
| 409 | Conflict | Means that the request cannot be completed, because of a conflict in the request. |
| 410 | Gone | Means that the requested page is not available anymore. |
| 411 | Length Required | Means that the content length is not defined and the server won't accept the request without it. |
| 412 | Precondition Failed | Means that precondition, which is given in the request, is evaluated to false by the server. |
| 413 | Request Entity Too Large | Means that the request entity is too large and that's why the server won't accept the request. |
| 414 | Request-URI Too Long | Means that the URL is too long and that's why the server won't accept the request. It happens when you convert a POST request to a GET request with a long query information. |
| 415 | Unsupported Media Type | Means that the media type is not supported and that's why the server won't accept the request. |
| 416 | Requested Range Not Satisfiable | Means that the client asked for a part of the file but the server cannot supply that part. |
| 417 | Expectation Failed | Means that the server cannot meet the requirements of the expected request header field. |
5xx: Ошибка сервера
| Код состояния | Сообщение | Описание |
|---|---|---|
| 500 | Internal Server Error | Is a generic error and users receive this error message when there is no more suitable specific message. |
| 501 | Not Implemented | Means that the server doesn't recognize the request method or it lacks the ability to fulfill the request. |
| 502 | Bad Gateway | Means that the server was acting as a gateway or proxy and it received an invalid answer from the upstream server. |
| 503 | Service Unavailable | Means that the server is not available now (It may be overloaded or down). |
| 504 | Gateway Timeout | Means that the server was acting as a gateway or proxy and it didn't get answer on time from the upstream server. |
| 505 | HTTP Version Not Supported | Means that the HTTP protocol version, used in the request, is not supported by the server. |
| 511 | Network Authentication Required | Means that the client needs to authenticate to gain network access. |
Practice
Which of the following are valid HTTP status codes according to the information available on w3docs.com?