Ошибка 405 http что это

Когда на сайт пытается попасть человек, а вместо искомого контента натыкается на ошибку, то важно выяснить, что это за ошибка и почему она посмела явиться в столь неподходящий (а это любой) момент.

Благо у нас есть замечательные коды 4хх и 5хх, хоть и не так подробно, как хотелось бы, но рассказывающие о том, почему возникла ошибка. Ну а мы, зная эту информацию, можем попытаться ошибку исправить. 

В этом материале речь пойдет об ошибке 405 Method Not Allowed. В деталях опишу проблему и расскажу, как ее побороть.

Что означает код ошибки сервера 405?

Код 405 Method Not Allowed говорит нам о том, что сервер получил определенный запрос с заданным HTTP-методом, смог его распознать, но не дает добро на его реализацию. То есть пользователь не получит доступ к контенту, который запросил.

В отличие от 404, 405 уточняет, что запрашиваемая страница существует и функционирует. Только вот стоит изменить используемый в HTTP-запросе метод. Иначе ничего не выйдет. 

Из-за чего я вижу эту ошибку?

Есть 9 HTTP-методов, которые используются браузерами для общения с серверами. Из них два задействуются чаще остальных. Это метод GET для запроса информации с ресурса и метод POST для передачи какой-нибудь информации на ресурс. Два метода покрывают почти все существующие сценарии взаимодействия клиента и сервера от запроса статьи до отправки логина и пароля на сайт. Так как они выполняют разные задачи, для сервера нет никакой нужды принимать GET для авторизации на сайте или POST для загрузки данных. Если же клиент так делает и отправляет некорректный запрос (не с тем методом, который должен быть), то сервер ответит ему ошибкой. То же произойдет, если ресурс будет настроен так, что не сможет принимать специфичный набор запросов, не попадающих в «стандарт». Такие дела.

Как исправить 405 Method Not Allowed?

Ок, небольшой ликбез провел, теперь расскажу о том, что можно предпринять, чтобы исправить обнаруженную ошибку и вернуть посетителям доступ к сайту. 

Что может сделать пользователь?

Ошибка Method Not Allowed под номером 4хх вроде бы говорит о вине клиента. Но несмотря на это, пользователь мало что может сделать, чтобы устранить проблему. В его компетенции только убедиться в том, что он не допустил ошибку в базовых вещах, и попробовать повторить те же действия в надежде на успех.

Заново открыть ту же страницу

Иногда 405 Method Not Allowed может исчезнуть после перезагрузки страницы. Так что перед тем как принимать сложные решения и жаловаться на владельцев сайта, нажмите F5 или Cmd + R раза два. 

Проверить, правильно ли он ввел URL-адрес

Несложная задача, но полезная. Как и в случае с кучей других ошибок, 405 может явиться из-за банальной опечатки или лишнего символа. К тому же многие серверы защищены таким образом, чтобы напрочь блокировать доступ к несуществующим страницам или каким-либо подуровням (в которые человек может пытаться залезть неслучайно). 

Так что пользователю стоит заглянуть в адресную строку браузера и убедиться в корректности введенной ссылки. Если что-то нет так, то лучше открыть главную страницу сайта и искать нужную информацию там, а не пытаться попасть на нее, вводя адрес вручную. 

Что может сделать владелец сайта?

Как это часто бывает, у сервера гораздо больше способов исправить клиентскую ошибку. Тут реально целый ворох решений: от удаления подозрительных компонентов из CMS до редактирования конфигурационных файлов. 

Проверить настройки сервера

Тут будут инструкции для владельцев сайтов на базе Apache и Nginx в Timeweb. Понятно, что есть другие варианты конфигураций, но эти два — чуть ли стандарт, использующийся повсеместно. А информация, касающаяся конкретно Timeweb, заденет только расположение файлов и работу с панелью управления хостинга. Остальные моменты универсальны. 

Инструкция для пользователей Apache

Наша задача состоит в том, чтобы в файле .htaccess найти записи, которые могут провоцировать появление ошибки 405. А потом их закомментировать или удалить. Чтобы это сделать:

• Открываем панель управления Timeweb.
• Ищем внутри вкладку «Файловая система» и переходим на нее.
• Открываем файл .htaccess.
• Внутри .htaccess ищем директивы Rewrite… (обычно это RewriteEngine, RewriteCond и RewriteRule).

Эти директивы помогают в настройке переадресации и некоторых других аспектах поведения сервера. Например, чтобы заставить сервер отправлять клиенту ошибку на каждый запрос GET, можно ввести такой код:

RewriteEngine on 
RewriteCond %{REQUEST_URI} ^/ru/services/?.$ 
RewriteCond %{REQUEST_METHOD} =GET 
RewriteRule ^(.)$ http://timeweb/ru/new$1 [R=405,L]

За появление ошибки отвечает запись [R=405,L]. То есть в настройках указано, как себя будет вести сервер при определенном запросе. Надо найти все такие директивы и закомментировать их, поставив # перед записью.

Инструкция для пользователей Nginx

Здесь нужно сделать примерно то же. Разница в том, как выглядит файл с настройками и в его расположении. 

• Ищем файл nginx.conf по пути /usr/local/nginx/conf или /usr/local/etc/nginx.
• Открываем его любым текстовым редактором.
• Находим код, включающий в себя упоминание ошибки 405.

В Nginx код выглядит немного сложнее. Например, запрос метода для ссылки https://moysait.com/ru/services/create будет выглядеть так:

server { listen 80; listen 443 ssl;

server_name moysait.com;

location /users/create { if ($request_method = POST) { return 405 https://moysait.com/services/create$request_uri; } } }

Делаем ту же процедуру. Останавливаемся везде, где находим директиву с ошибкой 405. Анализируем ее (вдруг, она тут случайно). И при необходимости комментируем или удаляем.

Исправить проблемы, связанные с PHP-скриптами

Ошибки могут возникнуть при попытке импортировать или экспортировать слишком объемную базу данных. На хостинге может быть установлено ограничение в полминуты, запрещающее использовать один PHP-скрипт дольше этого времени. Поэтому, если процесс затянется, сервер может отозваться ошибкой 405.

Обойти ограничение можно тремя путями:

• Попробовать экспортировать БД через phpMyAdmin.
• Разбить файл БД на несколько мелких частей, передача каждого из которых займет меньше 30 секунд.
• Использовать для передачи БД Cron-задачу. На них сервер выделяет больше времени.

Еще специалисты рекомендуют удалить статические файлы с разрешением, которые Nginx обрабатывать не должен. Это делается через панель управления хостингом в соответствующем разделе файлового менеджера.

Исправить эксклюзивные для Nginx ошибки

Как мы уже выяснили выше, ошибка может возникнуть при попытке использовать неподходящий метод. Вот как можно исправить это в случае с Nginx-сервером.

Первый вариант — убедить сервер в том, что вместо кода 405 надо отправлять код 200, и это вполне нормально:

server { 
   listen 80; 
   server_name localhost;
location / { 
   root html; 
   index index.html index.htm; } 
error_page 404 /404.html; 
  error_page 403 /403.html; 
error_page 405 =200 $uri;

…

}

Для тех, у кого Nginx-сервер — это proxy, понадобится вот такой код:

error_page 405 =200 @405; 

location @405 { root /htdocs; proxy_pass http://localhost:8080; }

Аналогичная ошибка возникает при работе с модулем FastCGI. Из-за него сервер неправильно считывает запросы с методом POST, поэтому необходимо делить параметры и адрес скрипта вот так:

location ~.php(.*) {
 fastcgi_pass 127.0.0.1:9000;
 fastcgi_split_path_info ^(.+.php)(.*)$;
 fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
 fastcgi_param PATH_INFO $fastcgi_path_info;
 fastcgi_param PATH_TRANSLATED $document_root$fastcgi_path_info;
 include /etc/nginx/fastcgi_params;
}

Далее речь пойдет об общих методах диагностики и исправления ошибок. На крайний случай, если конкретные решения не помогли.

Проанализировать все недавние изменения в коде

Если недавно что-то поменяли, а после этого все сломалось, то надо это «поменяли» рассмотреть подробнее. Провести ручной дебаггинг, если можно это так назвать. Наверняка где-то затесалась несерьезная, но обидная ошибка. 

Удалить сторонние дополнения для CMS

Если вы используете условный WordPress, то разного рода ошибки могут подкрасться оттуда, где их не ждешь. Например, после установки нового расширения. 

Так что при подозрении на наличие сбойного дополнения, лучше попробовать от него избавиться и посмотреть, что будет. Возможно, ошибка исчезнет. 

После этого уже можно будет поискать альтернативное расширение или пообщаться с разработчиками по поводу того, почему вообще возникает сбой.

Главное, не забудьте сделать резервную копию CMS перед тем, как что-то удалять и менять. И продолжайте делать бэкапы после, чтобы всегда можно было восстановить рабочую версию сайта.

Откатиться на более старую версию CMS

Бывает так, что сама CMS несет в себе баги и ошибки. Ну или криво установилась. В таком случае можно восстановиться из старой резервной копии и откатиться на одну или несколько версий в прошлое. Когда все работало без ошибок.

Проверить новые записи в базе данных

Расширения могут вносить изменения в базу данных сайта. Иногда не очень полезные. Надо проверить, не появилось ли после установки свежего дополнения каких-либо непрошенных изменений в базе данных. Может, появились подозрительные записи, которых не должно быть. Лучше подвергнуть анализу всю БД от начала до конца (если другие методы исправления ошибки 405 не помогли, конечно).

На этом будем заканчивать. Мы и так уже перешли на самые маловероятные способы исправления этой ошибки. Надеюсь, они не понадобятся, но знать о таких вариантах стоит. Вдруг эти знания когда-нибудь спасут вас и посетителей вашего сайта.

From Wikipedia, the free encyclopedia

This is a list of Hypertext Transfer Protocol (HTTP) response status codes. Status codes are issued by a server in response to a client’s request made to the server. It includes codes from IETF Request for Comments (RFCs), other specifications, and some additional codes used in some common applications of the HTTP. The first digit of the status code specifies one of five standard classes of responses. The optional message phrases shown are typical, but any human-readable alternative may be provided, or none at all.

Unless otherwise stated, the status code is part of the HTTP standard (RFC 9110).

The Internet Assigned Numbers Authority (IANA) maintains the official registry of HTTP status codes.^[1]

All HTTP response status codes are separated into five classes or categories. The first digit of the status code defines the class of response, while the last two digits do not have any classifying or categorization role. There are five classes defined by the standard:

• 1xx informational response – the request was received, continuing process
• 2xx successful – the request was successfully received, understood, and accepted
• 3xx redirection – further action needs to be taken in order to complete the request
• 4xx client error – the request contains bad syntax or cannot be fulfilled
• 5xx server error – the server failed to fulfil an apparently valid request

1xx informational response

An informational response indicates that the request was received and understood. It is issued on a provisional basis while request processing continues. It alerts the client to wait for a final response. The message consists only of the status line and optional header fields, and is terminated by an empty line. As the HTTP/1.0 standard did not define any 1xx status codes, servers must not^{[note 1]} send a 1xx response to an HTTP/1.0 compliant client except under experimental conditions.

100 Continue

The server has received the request headers and the client should proceed to send the request body (in the case of a request for which a body needs to be sent; for example, a POST request). Sending a large request body to a server after a request has been rejected for inappropriate headers would be inefficient. To have a server check the request’s headers, a client must send Expect: 100-continue as a header in its initial request and receive a 100 Continue status code in response before sending the body. If the client receives an error code such as 403 (Forbidden) or 405 (Method Not Allowed) then it should not send the request’s body. The response 417 Expectation Failed indicates that the request should be repeated without the Expect header as it indicates that the server does not support expectations (this is the case, for example, of HTTP/1.0 servers).^[2]

101 Switching Protocols

The requester has asked the server to switch protocols and the server has agreed to do so.

102 Processing (WebDAV; RFC 2518)

A WebDAV request may contain many sub-requests involving file operations, requiring a long time to complete the request. This code indicates that the server has received and is processing the request, but no response is available yet.^[3] This prevents the client from timing out and assuming the request was lost. The status code is deprecated.^[4]

103 Early Hints (RFC 8297)

Used to return some response headers before final HTTP message.^[5]

2xx success

This class of status codes indicates the action requested by the client was received, understood, and accepted.^[1]

200 OK

Standard response for successful HTTP requests. The actual response will depend on the request method used. In a GET request, the response will contain an entity corresponding to the requested resource. In a POST request, the response will contain an entity describing or containing the result of the action.

201 Created

The request has been fulfilled, resulting in the creation of a new resource.^[6]

202 Accepted

The request has been accepted for processing, but the processing has not been completed. The request might or might not be eventually acted upon, and may be disallowed when processing occurs.

203 Non-Authoritative Information (since HTTP/1.1)

The server is a transforming proxy (e.g. a Web accelerator) that received a 200 OK from its origin, but is returning a modified version of the origin’s response.^[7][8]

204 No Content

The server successfully processed the request, and is not returning any content.

205 Reset Content

The server successfully processed the request, asks that the requester reset its document view, and is not returning any content.

206 Partial Content

The server is delivering only part of the resource (byte serving) due to a range header sent by the client. The range header is used by HTTP clients to enable resuming of interrupted downloads, or split a download into multiple simultaneous streams.

207 Multi-Status (WebDAV; RFC 4918)

The message body that follows is by default an XML message and can contain a number of separate response codes, depending on how many sub-requests were made.^[9]

208 Already Reported (WebDAV; RFC 5842)

The members of a DAV binding have already been enumerated in a preceding part of the (multistatus) response, and are not being included again.

226 IM Used (RFC 3229)

The server has fulfilled a request for the resource, and the response is a representation of the result of one or more instance-manipulations applied to the current instance.^[10]

3xx redirection

This class of status code indicates the client must take additional action to complete the request. Many of these status codes are used in URL redirection.^[1]

A user agent may carry out the additional action with no user interaction only if the method used in the second request is GET or HEAD. A user agent may automatically redirect a request. A user agent should detect and intervene to prevent cyclical redirects.^[11]

300 Multiple Choices

Indicates multiple options for the resource from which the client may choose (via agent-driven content negotiation). For example, this code could be used to present multiple video format options, to list files with different filename extensions, or to suggest word-sense disambiguation.

301 Moved Permanently

This and all future requests should be directed to the given URI.

302 Found (Previously «Moved temporarily»)

Tells the client to look at (browse to) another URL. The HTTP/1.0 specification (RFC 1945) required the client to perform a temporary redirect with the same method (the original describing phrase was «Moved Temporarily»),^[12] but popular browsers implemented 302 redirects by changing the method to GET. Therefore, HTTP/1.1 added status codes 303 and 307 to distinguish between the two behaviours.^[11]

303 See Other (since HTTP/1.1)

The response to the request can be found under another URI using the GET method. When received in response to a POST (or PUT/DELETE), the client should presume that the server has received the data and should issue a new GET request to the given URI.

304 Not Modified

Indicates that the resource has not been modified since the version specified by the request headers If-Modified-Since or If-None-Match. In such case, there is no need to retransmit the resource since the client still has a previously-downloaded copy.

305 Use Proxy (since HTTP/1.1)

The requested resource is available only through a proxy, the address for which is provided in the response. For security reasons, many HTTP clients (such as Mozilla Firefox and Internet Explorer) do not obey this status code.

306 Switch Proxy

No longer used. Originally meant «Subsequent requests should use the specified proxy.»

307 Temporary Redirect (since HTTP/1.1)

In this case, the request should be repeated with another URI; however, future requests should still use the original URI. In contrast to how 302 was historically implemented, the request method is not allowed to be changed when reissuing the original request. For example, a POST request should be repeated using another POST request.

308 Permanent Redirect

This and all future requests should be directed to the given URI. 308 parallel the behaviour of 301, but does not allow the HTTP method to change. So, for example, submitting a form to a permanently redirected resource may continue smoothly.

4xx client errors

This class of status code is intended for situations in which the error seems to have been caused by the client. Except when responding to a HEAD request, the server should include an entity containing an explanation of the error situation, and whether it is a temporary or permanent condition. These status codes are applicable to any request method. User agents should display any included entity to the user.

400 Bad Request

The server cannot or will not process the request due to an apparent client error (e.g., malformed request syntax, size too large, invalid request message framing, or deceptive request routing).

401 Unauthorized

Similar to 403 Forbidden, but specifically for use when authentication is required and has failed or has not yet been provided. The response must include a WWW-Authenticate header field containing a challenge applicable to the requested resource. See Basic access authentication and Digest access authentication. 401 semantically means «unauthorised», the user does not have valid authentication credentials for the target resource.

Some sites incorrectly issue HTTP 401 when an IP address is banned from the website (usually the website domain) and that specific address is refused permission to access a website.^{[citation needed]}

402 Payment Required

Reserved for future use. The original intention was that this code might be used as part of some form of digital cash or micropayment scheme, as proposed, for example, by GNU Taler,^[14] but that has not yet happened, and this code is not widely used. Google Developers API uses this status if a particular developer has exceeded the daily limit on requests.^[15] Sipgate uses this code if an account does not have sufficient funds to start a call.^[16] Shopify uses this code when the store has not paid their fees and is temporarily disabled.^[17] Stripe uses this code for failed payments where parameters were correct, for example blocked fraudulent payments.^[18]

403 Forbidden

The request contained valid data and was understood by the server, but the server is refusing action. This may be due to the user not having the necessary permissions for a resource or needing an account of some sort, or attempting a prohibited action (e.g. creating a duplicate record where only one is allowed). This code is also typically used if the request provided authentication by answering the WWW-Authenticate header field challenge, but the server did not accept that authentication. The request should not be repeated.

404 Not Found

The requested resource could not be found but may be available in the future. Subsequent requests by the client are permissible.

405 Method Not Allowed

A request method is not supported for the requested resource; for example, a GET request on a form that requires data to be presented via POST, or a PUT request on a read-only resource.

406 Not Acceptable

The requested resource is capable of generating only content not acceptable according to the Accept headers sent in the request. See Content negotiation.

407 Proxy Authentication Required

The client must first authenticate itself with the proxy.

408 Request Timeout

The server timed out waiting for the request. According to HTTP specifications: «The client did not produce a request within the time that the server was prepared to wait. The client MAY repeat the request without modifications at any later time.»

409 Conflict

Indicates that the request could not be processed because of conflict in the current state of the resource, such as an edit conflict between multiple simultaneous updates.

410 Gone

Indicates that the resource requested was previously in use but is no longer available and will not be available again. This should be used when a resource has been intentionally removed and the resource should be purged. Upon receiving a 410 status code, the client should not request the resource in the future. Clients such as search engines should remove the resource from their indices. Most use cases do not require clients and search engines to purge the resource, and a «404 Not Found» may be used instead.

411 Length Required

The request did not specify the length of its content, which is required by the requested resource.

412 Precondition Failed

The server does not 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. Previously called «Request Entity Too Large» in RFC 2616.^[19]

414 URI Too Long

The URI provided was too long for the server to process. Often the result of too much data being encoded as a query-string of a GET request, in which case it should be converted to a POST request. Called «Request-URI Too Long» previously in RFC 2616.^[20]

415 Unsupported Media Type

The request entity has a media type which the server or resource does not support. For example, the client uploads an image as image/svg+xml, but the server requires that images use a different format.

416 Range Not Satisfiable

The client has asked for a portion of the file (byte serving), but the server cannot supply that portion. For example, if the client asked for a part of the file that lies beyond the end of the file. Called «Requested Range Not Satisfiable» previously RFC 2616.^[21]

417 Expectation Failed

The server cannot meet the requirements of the Expect request-header field.^[22]

418 I’m a teapot (RFC 2324, RFC 7168)

This code was defined in 1998 as one of the traditional IETF April Fools’ jokes, in RFC 2324, Hyper Text Coffee Pot Control Protocol, and is not expected to be implemented by actual HTTP servers. The RFC specifies this code should be returned by teapots requested to brew coffee.^[23] This HTTP status is used as an Easter egg in some websites, such as Google.com’s «I’m a teapot» easter egg.^[24][25][26] Sometimes, this status code is also used as a response to a blocked request, instead of the more appropriate 403 Forbidden.^[27][28]

421 Misdirected Request

The request was directed at a server that is not able to produce a response (for example because of connection reuse).

422 Unprocessable Entity

The request was well-formed but was unable to be followed due to semantic errors.^[9]

423 Locked (WebDAV; RFC 4918)

The resource that is being accessed is locked.^[9]

424 Failed Dependency (WebDAV; RFC 4918)

The request failed because it depended on another request and that request failed (e.g., a PROPPATCH).^[9]

425 Too Early (RFC 8470)

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 such as TLS/1.3, given in the Upgrade header field.

428 Precondition Required (RFC 6585)

The origin server requires the request to be conditional. Intended to prevent the ‘lost update’ problem, where a client GETs a resource’s state, modifies it, and PUTs it back to the server, when meanwhile a third party has modified the state on the server, leading to a conflict.^[29]

429 Too Many Requests (RFC 6585)

The user has sent too many requests in a given amount of time. Intended for use with rate-limiting schemes.^[29]

431 Request Header Fields Too Large (RFC 6585)

The server is unwilling to process the request because either an individual header field, or all the header fields collectively, are too large.^[29]

451 Unavailable For Legal Reasons (RFC 7725)

A server operator has received a legal demand to deny access to a resource or to a set of resources that includes the requested resource.^[30] The code 451 was chosen as a reference to the novel Fahrenheit 451 (see the Acknowledgements in the RFC).

5xx server errors

The server failed to fulfil a request.

Response status codes beginning with the digit «5» indicate cases in which the server is aware that it has encountered an error or is otherwise incapable of performing the request. Except when responding to a HEAD request, the server should include an entity containing an explanation of the error situation, and indicate whether it is a temporary or permanent condition. Likewise, user agents should display any included entity to the user. These response codes are applicable to any request method.

500 Internal Server Error

A generic error message, given when an unexpected condition was encountered and no more specific message is suitable.

501 Not Implemented

The server either does not recognize the request method, or it lacks the ability to fulfil the request. Usually this implies future availability (e.g., a new feature of a web-service API).

502 Bad Gateway

The server was acting as a gateway or proxy and received an invalid response from the upstream server.

503 Service Unavailable

The server cannot handle the request (because it is overloaded or down for maintenance). Generally, this is a temporary state.^[31]

504 Gateway Timeout

The server was acting as a gateway or proxy and did not receive a timely response from the upstream server.

505 HTTP Version Not Supported

The server does not support the HTTP version used in the request.

506 Variant Also Negotiates (RFC 2295)

Transparent content negotiation for the request results in a circular reference.^[32]

507 Insufficient Storage (WebDAV; RFC 4918)

The server is unable to store the representation needed to complete the request.^[9]

508 Loop Detected (WebDAV; RFC 5842)

The server detected an infinite loop while processing the request (sent instead of 208 Already Reported).

510 Not Extended (RFC 2774)

Further extensions to the request are required for the server to fulfil it.^[33]

511 Network Authentication Required (RFC 6585)

The client needs to authenticate to gain network access. Intended for use by intercepting proxies used to control access to the network (e.g., «captive portals» used to require agreement to Terms of Service before granting full Internet access via a Wi-Fi hotspot).^[29]

Unofficial codes

The following codes are not specified by any standard.

419 Page Expired (Laravel Framework)

Used by the Laravel Framework when a CSRF Token is missing or expired.

420 Method Failure (Spring Framework)

A deprecated response used by the Spring Framework when a method has failed.^[34]

420 Enhance Your Calm (Twitter)

Returned by version 1 of the Twitter Search and Trends API when the client is being rate limited; versions 1.1 and later use the 429 Too Many Requests response code instead.^[35] The phrase «Enhance your calm» comes from the 1993 movie Demolition Man, and its association with this number is likely a reference to cannabis.^{[citation needed]}

430 Request Header Fields Too Large (Shopify)

Used by Shopify, instead of the 429 Too Many Requests response code, when too many URLs are requested within a certain time frame.^[36]

450 Blocked by Windows Parental Controls (Microsoft)

The Microsoft extension code indicated when Windows Parental Controls are turned on and are blocking access to the requested webpage.^[37]

498 Invalid Token (Esri)

Returned by ArcGIS for Server. Code 498 indicates an expired or otherwise invalid token.^[38]

499 Token Required (Esri)

Returned by ArcGIS for Server. Code 499 indicates that a token is required but was not submitted.^[38]

509 Bandwidth Limit Exceeded (Apache Web Server/cPanel)

The server has exceeded the bandwidth specified by the server administrator; this is often used by shared hosting providers to limit the bandwidth of customers.^[39]

529 Site is overloaded

Used by Qualys in the SSLLabs server testing API to signal that the site can’t process the request.^[40]

530 Site is frozen

Used by the Pantheon Systems web platform to indicate a site that has been frozen due to inactivity.^[41]

598 (Informal convention) Network read timeout error

Used by some HTTP proxies to signal a network read timeout behind the proxy to a client in front of the proxy.^[42]

599 Network Connect Timeout Error

An error used by some HTTP proxies to signal a network connect timeout behind the proxy to a client in front of the proxy.

Internet Information Services

Microsoft’s Internet Information Services (IIS) web server expands the 4xx error space to signal errors with the client’s request.

440 Login Time-out

The client’s session has expired and must log in again.^[43]

449 Retry With

The server cannot honour the request because the user has not provided the required information.^[44]

451 Redirect

Used in Exchange ActiveSync when either a more efficient server is available or the server cannot access the users’ mailbox.^[45] The client is expected to re-run the HTTP AutoDiscover operation to find a more appropriate server.^[46]

IIS sometimes uses additional decimal sub-codes for more specific information,^[47] however these sub-codes only appear in the response payload and in documentation, not in the place of an actual HTTP status code.

nginx

The nginx web server software expands the 4xx error space to signal issues with the client’s request.^[48][49]

444 No Response

Used internally^[50] to instruct the server to return no information to the client and close the connection immediately.

494 Request header too large

Client sent too large request or too long header line.

495 SSL Certificate Error

An expansion of the 400 Bad Request response code, used when the client has provided an invalid client certificate.

496 SSL Certificate Required

An expansion of the 400 Bad Request response code, used when a client certificate is required but not provided.

497 HTTP Request Sent to HTTPS Port

An expansion of the 400 Bad Request response code, used when the client has made a HTTP request to a port listening for HTTPS requests.

499 Client Closed Request

Used when the client has closed the request before the server could send a response.

Cloudflare

Cloudflare’s reverse proxy service expands the 5xx series of errors space to signal issues with the origin server.^[51]

520 Web Server Returned an Unknown Error

The origin server returned an empty, unknown, or unexpected response to Cloudflare.^[52]

521 Web Server Is Down

The origin server refused connections from Cloudflare. Security solutions at the origin may be blocking legitimate connections from certain Cloudflare IP addresses.

522 Connection Timed Out

Cloudflare timed out contacting the origin server.

523 Origin Is Unreachable

Cloudflare could not reach the origin server; for example, if the DNS records for the origin server are incorrect or missing.

524 A Timeout Occurred

Cloudflare was able to complete a TCP connection to the origin server, but did not receive a timely HTTP response.

525 SSL Handshake Failed

Cloudflare could not negotiate a SSL/TLS handshake with the origin server.

526 Invalid SSL Certificate

Cloudflare could not validate the SSL certificate on the origin web server. Also used by Cloud Foundry’s gorouter.

527 Railgun Error

Error 527 indicates an interrupted connection between Cloudflare and the origin server’s Railgun server.^[53]

530

Error 530 is returned along with a 1xxx error.^[54]

AWS Elastic Load Balancer

Amazon’s Elastic Load Balancing adds a few custom return codes

460

Client closed the connection with the load balancer before the idle timeout period elapsed. Typically when client timeout is sooner than the Elastic Load Balancer’s timeout.^[55]

463

The load balancer received an X-Forwarded-For request header with more than 30 IP addresses.^[55]

464

Incompatible protocol versions between Client and Origin server.^[55]

561 Unauthorized

An error around authentication returned by a server registered with a load balancer. You configured a listener rule to authenticate users, but the identity provider (IdP) returned an error code when authenticating the user.^[55]

Caching warning codes (obsoleted)

The following caching related warning codes were specified under RFC 7234. Unlike the other status codes above, these were not sent as the response status in the HTTP protocol, but as part of the «Warning» HTTP header.^[56][57]

Since this «Warning» header is often neither sent by servers nor acknowledged by clients, this header and its codes were obsoleted by the HTTP Working Group in 2022 with RFC 9111.^[58]

110 Response is Stale

The response provided by a cache is stale (the content’s age exceeds a maximum age set by a Cache-Control header or heuristically chosen lifetime).

111 Revalidation Failed

The cache was unable to validate the response, due to an inability to reach the origin server.

112 Disconnected Operation

The cache is intentionally disconnected from the rest of the network.

113 Heuristic Expiration

The cache heuristically chose a freshness lifetime greater than 24 hours and the response’s age is greater than 24 hours.

199 Miscellaneous Warning

Arbitrary, non-specific warning. The warning text may be logged or presented to the user.

214 Transformation Applied

Added by a proxy if it applies any transformation to the representation, such as changing the content encoding, media type or the like.

299 Miscellaneous Persistent Warning

Same as 199, but indicating a persistent warning.

See also

• Custom error pages
• List of FTP server return codes
• List of HTTP header fields
• List of SMTP server return codes
• Common Log Format

Explanatory notes

References

External links

• «RFC 9110: HTTP Semantics and Content, Section 15 «Status Codes»«.
• Hypertext Transfer Protocol (HTTP) Status Code Registry at the Internet Assigned Numbers Authority
• HTTP status codes at http-statuscode.com
• MDN status code reference at mozilla.org

HTTP response status code 405 Method Not Allowed is a client error that is returned by the server to indicate that the resource specified by the request exists but the requested HTTP method is not allowed. For example, an HTTP method DELETE request is not allowed for a read-only resource.

The response is cacheable by default. If the default behavior needs to be overridden then the response must include the appropriate HTTP caching headers.

Usage

When the 405 Method Not Allowed error message is received, the client will understand that the resource exists but the specified request is not allowed. As part of the response, the server will send an Allow header to inform the client as to which operations are currently supported.

Example

In the example, the client requests a resource and the server responds with the 405 Method Not Allowed status because the client is trying to use an HTTP method DELETE on a read-only resource. When parsing the response, the client learns that only HTTP methods GET, HEAD, and OPTIONS operations are allowed.

Request==

DELETE /policies.pdf HTTP/1.1
Host: www.example.ai

Response

HTTP/1.1 405 Method Not Allowed
Allow: GET, HEAD, OPTIONS
Content-Type: text/html
Content-Length: 157

<html>
  <head>
    <title>Operation Not Permitted</title>
  </head>
  <body>
    <p>This resource is read-only and cannot be deleted.</p>
  </body>
</html>

Code references

.NET

HttpStatusCode.MethodNotAllowed

Rust

http::StatusCode::METHOD_NOT_ALLOWED

Rails

:method_not_allowed

Go

http.StatusMethodNotAllowed

Symfony

Response::HTTP_METHOD_NOT_ALLOWED

Python3.5+

http.HTTPStatus.METHOD_NOT_ALLOWED

Java

java.net.HttpURLConnection.HTTP_BAD_METHOD

Apache HttpComponents Core

org.apache.hc.core5.http.HttpStatus.SC_METHOD_NOT_ALLOWED

Angular

@angular/common/http/HttpStatusCode.MethodNotAllowed

Takeaway

The 405 Method Not Allowed status code indicates that the resource exists but the specified operation is not allowed. A list of acceptable HTTP methods are returned to the client.

See also

• RFC 7231

Funny enough, HTTP error codes are both really useful and incredibly frustrating at the same time.

Seeing an error when you load a page makes it very clear that something has gone wrong with the website — But most of us haven’t got the faintest clue about what “405 Method Not Allowed” means, let alone how to fix it.

That’s why we wrote this handy-dandy guide! A 405 error isn’t any reason to panic; there are just a few steps to restore your website back to working order.

Over the next few pages, we will explain what this error is all about and show you how to make it disappear.

What Is the 405 Method Not Allowed Error?

The 405 error is a type of HTTP status code — This means it’s a message that a server sends to your web browser, explaining why it can’t deliver the content you asked for.

A persistent 405 status code is a problem for anyone running a website. If multiple users see the same error, that means there’s something misconfigured on your website.

Until you fix the problem, visitors won’t be able to access the page where the error code is displayed.

This error code may appear as:

• 405 Method Not Allowed
• 405 Not Allowed
• Method Not Allowed
• HTTP 405 Error
• HTTP Error 405 – Method Not Allowed
• HTTP 405 Method Not Allowed

What Causes the 405 Error?

Let’s get a bit more technical.

Whenever you try to visit a specific web page, your browser asks the hosting server to send over the content. Typically, the server sees this request and shoots the page straight to your device in a fraction of a second. Success!

This whole process is regulated by HTTP, or Hypertext Transfer Protocol. This protocol uses a series of status codes to track progress and problems.

Codes in the 400s relate to client-side errors. And the 405 Method Not Allowed error code means that your browser has sent an HTTP request (GET, POST, PUT, etc.) that isn’t allowed for that specific resource, or URL.

In many cases, this is triggered by something the user does. The most common cause is inputting the wrong URL.

However, the 405 error code can also appear when something has gone wrong with the configuration of your website. We will explore some of those issues later.

What Is the Difference Between 404 and 405 Errors?

Both 404 and 405 errors prevent users from accessing content on your website, but they relate to different problems.

The 404 error code shows up when someone visits a URL where no context exists. For example, this sometimes happens when pages are removed, or domains are changed.

In contrast, the 405 error means that your server is rejecting an HTTP request from a browser. The content is there, but the server refuses to provide access because the request was made in the wrong format.

Understanding what causes the 405 error is an important step in solving the issue.

However, this status code doesn’t tell us exactly what’s wrong. The only way to identify the precise problem is by troubleshooting.

Ready to get started? Here’s a checklist of potential fixes:

1) Check Your Links

When you spot a 405 error in the wild, there’s a strong chance that you simply visited the wrong page.

For security reasons, web servers are typically configured to accept only specific types of requests on each URL. If you visit a page that is not open access, you may end up seeing the 405 error message.

If visitors to your site consistently see 405 error codes, it might be because they are following a bad link.

One way to prevent this is by checking your site using the Dead Link Checker or a similar free tool. And make sure that none of your social links and landing pages point towards private pages.

2) Check Your Updates

Have you updated your content management system, your theme, or even a plugin recently? That might be why you’re suddenly seeing 405 Method Not Allowed error messages.

Updates are essential for maintaining good website security. They can also fix existing bugs, and give you access to new features. But just occasionally, fresh updates introduce new gremlins.

If you’re unsure if you’re due for an update, log into your admin account and navigate to Dashboard > Updates page. Here, you’ll see a timestamp of the last time WordPress checked for updates. If need be, you can click “Check again” to manually check for updates.

Unfortunately, sometimes an update might break your website. To fix this, you can simply roll back to the previous version of the system, theme, or plugin that might be causing problems.

The exact process here depends on what you need to downgrade. For instance, WordPress users can use the WP Downgrade plugin to revert to a previous version.

For some websites, the easiest route is simply to restore your entire site from a backup — see step 10 for more.

How to Downgrade WordPress Plugins and Themes

If you believe that a specific theme or plugin is causing the problem, we recommend using the WP Rollback plugin. Once activated, this gives you the option to downgrade any plugin or theme you have installed.

Simply open up Plugins > Installed Plugins or Appearance > Themes inside your WordPress Admin area, and you will see a little “Rollback” button under each plugin or theme.

Click this, and WP Rollback will allow you to choose the exact version you want to restore.

Once the downgrade is complete, make sure to hit Activate on the plugin or theme to put the old version into action.

3) Uninstall New Plugins, Modules, and Themes 

Just as updates to existing plugins and themes can mess things up, so can brand new additions to your site.

With this in mind, it’s worth deactivating new plugins, modules, and themes if you start seeing 405 Method Not Allowed errors on your site.

Once again, the process here will depend on the content management system you are using.

In WordPress, you can do this through the Admin area. Navigate to Plugins or Appearance > Themes, and you should see a little red Deactivate button next to every plugin and theme.

Not sure which plugin is causing the problem? You can disable all your plugins within a minute via FTP or SSH:

1. In your FTP/SSH client, head to your WordPress site directory
2. Navigate to wp-content and right-click on plugins
3. Select Rename
4. Change the name of the folder to /plugins_OFF

This will immediately cut off all plugins. When you want to reverse the process, simply follow the steps again and rename the folder as plugins.

If you want to delete themes through FTP/SSH:

1. Visit your site directory
2. Navigate to wp-content/themes directory.
3. Delete the folder of the theme you want to remove

Just bear in mind that you might want to keep a backup of this folder, just in case the theme is not to blame.

4) Restore Your Database 

Plugins and themes usually need at least some access to your database to perform their duties.

Sometimes they get a little unruly and start making changes to parts of the database that are none of their business. These changes can cause 405 errors.

Even if you remove the offending plugin or theme, the changes they made will remain. There are only two ways to fix these issues:

• Look through your database logs for problematic changes
• Restore a previous version of your database

Database Logs

To access the database logs for your website, head to the control panel of your hosting provider. Usually, you will only be able to access logs if you have a private server.

For databases hosted with DreamHost, head to MySQL Databases to find the name of your MySQL Databases, and then get in touch with technical support to get access.

If you know exactly when the 405 errors started appearing, you may be able to find the offending database change by sorting the logs by time. You’re looking for “INSERT”, “UPDATE”, or “DELETE” changes.

Just be aware that you need a strong knowledge of web development to identify potential problems here. If you’re not sure what you’re looking at, avoid making modifications and consult a professional.

Restore Your Database

If you don’t have developer-level skills, restoring your database to a previous version is probably a more realistic option.

As with site data, DreamHost automatically creates a backup of your database every day. To restore one of these backups:

• Visit the MySQL Databases page in your account
• Click the Restore DB button to the right of your database
• Choose the time of the backup you want to restore
• Under When restoring, select option 3 or 4 depending on your CMS; choose option 4 for WordPress

5) Read Your Server-Side Logs

Just as your database logs can reveal problems that will lead to 405 errors, we can also find clues in the server-side logs.

The files we’re looking for here are named error.log and access.log. With DreamHost, you can view them via SFTP (Secure File Transfer Protocol):

• In your FTP client, visit the /logs directory in your user folder
• Open the site you want to check
• Open the most recent directory with a name that starts with http
• Open the log file inside, using your preferred text editor

When you examine the files, check for errors relating to server configuration or changes to your web application code.

6) Confirm Your Web Server Configuration

As we mentioned earlier, the 405 Method Not Allowed error occurs when a web server rejects a request.

Most of the time, this is helpful. If your server did not block certain request methods, your site could easily be overwhelmed with unwanted attention.

But just like an over-aggressive club doorman, sometimes web servers block the wrong kind of requests, or wrongly restrict access to certain content. This is usually caused by incorrect server configuration. The result is that visitors are redirected to an error page.

To figure out whether this is the problem with your site, you will need to visit your server configuration file. The exact file name will depend on whether your web server software is Apache, Nginx, or Cloudflare.

We use Apache by default at DreamHost, so you’re looking for the .htaccess file in the root directory of your site. On VPS plans, you have the option to switch to Nginx hosting; in this case, your configuration file will be nginx.conf.

After finding the relevant file, open it with your preferred text editor. Next, search for Rewrite commands. These are associated with Apache’s mod_rewrite module.

This module allows you to modify URLs that are requested by users, before they are processed by your server. This can be useful when you want to redirect users to a different page, divert certain types of traffic, or just display a more user-friendly URL.

The problems usually involve commands like this in your configuration file:

RewriteRule ^(.*)$ http: //example.com [R=405, L]

This makes the server return a 405 HTTP response status code when someone visits the URL mentioned in the command.

If you’re struggling with persistent errors, try commenting out such commands in your config file. You can do this by adding a # at the start of the line you wish to comment out.

Alternatively, you can change the directive from RewriteEngine ON to RewriteEngine OFF.

7) Fix File Permissions

Another reason why a server might be blocking access to certain content is because your site permissions are misconfigured.

For instance, your server may allow an admin to use a specific HTTP method. But when a general site visitor tries the same request, they are blocked and handed an error code.

The fastest way to check and manage permissions is usually through your panel. DreamHost users can utilize the built-in file manager:

• Visit Manage Websites and tap the Manage button
• Open the directory for your website
• To view permissions, right click on any file and choose CHMOD

You may just discover that one of your important files does not have public read access.

If you’re running your own private server or VPS, it’s also worth checking the configuration settings. Your server might be set up to accept only certain HTTP request methods for specific file types.

Debug Your Code

Ultimately, the cause of your 405 errors might be that something is wrong with the code of your website or web app.

To diagnose such problems, you will need to follow a full debugging process. This usually involves creating a complete local copy of your website, and then trying to recreate the error. Alternatively, you can use an online development environment.

The exact process you will need to follow is dependent on the CMS, scripts, and programming languages you’re using. If your site runs on WordPress and you are confident in the command line, you could try using WP-CLI.

9) Restore Your Whole Website

Sometimes in life, you need to know when to accept defeat and, as the kids say “take the L”.

If you’ve tried other fixes and nothing seems to work, you might just need to restore your site to how it was before the client errors arrived.

When you host any website with DreamHost, we always recommend making regular backups and keeping a copy of those files offline. But we do keep daily backups of every website that is hosted on our servers.

This means you can restore your website to how it was yesterday with a couple of clicks.

To achieve this, head to Hosted Domains, and click the Restore button on the right-hand side.

Then, choose how far you want to go back in time, and select the “Make backup copy live” option. This will replace your current live site with your chosen backup.

If you’re using DreamPress, you can complete the same process by visiting Managed WordPress and tapping the Manage button beside your domain.

Next, select the Backups tag and hit Restore on the archived version you want to use. Confirm with Start restore, and your site will soon be back to the way it was, without the 405 error.

10) Double-Check Your A Records

One final tip: make sure the A records for your domain are configured correctly.

In some cases, you may see 405 errors if your A records are pointing towards the wrong server. For instance, a server that is set up for hosting your website might have different rules than one set up for hosting an API (Application Programming Interface).

If your domain is registered or managed via DreamHost, you can check your A records by visiting Manage Websites:

• Tap on the three dots
• Select DNS Settings from the menu

Bonus: Stop 405 Errors on Your API Calls

If your site relies on a connection with an external API, you might come across a 405 error because the API server is refusing your request. This is often down to incorrect request formatting.

To prevent this from happening, make sure to include a “Content-Type” header with your POST requests. Here are some examples:

• Java/PHP – Content-Type: application/json
• HTML – Content-Type: text/html; charset=UTF-8
• XML – Content-Type: application/xml

It’s also a good idea to include an “Accept” header:

• Java/PHP – Accept: application/json
• HTML – Accept: text/html
• XML – Accept: application/xml

Be sure to check API documentation, as well. You might find out that the type of request you’re making is not supported by the API. Likewise, your site or application logs may reveal the underlying problem here.

How to Stop the 405 Error From Returning

Working through all of the steps mentioned above is no small task. But if you’re willing to put in the effort, you should be able to banish all 405 errors that are showing up on your website or app.

Want to make sure you don’t go through the whole thing again? Here are a few key tips:

• Test your site – Whenever you install new plugins or themes, make sure to run some tests. If the change is going to cause 405 errors, it’s good to know early!
• Pay attention to authentication – Always keep an eye on who has access to what resources on your server.
• Help your users to troubleshoot – In the majority of cases, 405 errors are isolated to a specific user. Consider setting up custom error pages that include information about how users can fix the problem themselves.

With a little persistence, you can conquer the 405 error once and for all, and provide a seamless browsing experience for your visitors!