7 files changed, 474 insertions, 0 deletions
diff --git a/files/it/web/http/status/100/index.html b/files/it/web/http/status/100/index.html
new file mode 100644
index 0000000000..78a7c0a159
--- /dev/null
+++ b/files/it/web/http/status/100/index.html
@@ -0,0 +1,42 @@
+---
+title: 100 Continue
+slug: Web/HTTP/Status/100
+translation_of: Web/HTTP/Status/100
+---
+<div>{{HTTPSidebar}}</div>
+
+<p>La risposta informativa HTTP <strong><code>100 Continue</code></strong> indica che non si sono verificati errori e che il client può continuare con la richiesta o ignorarla nel caso fosse finita.</p>
+
+<p>Per far si che il server controlli l'header della richiesta, il client deve mandare {{HTTPHeader("Expect")}}<code>: 100-continue</code> come header nella sua richiesta iniziale e deve ricevere un <code>100 Continue</code> come codice di risposta prima di poter mandare il corpo della richiesta.</p>
+
+<h2 id="Stato">Stato</h2>
+
+<pre class="syntaxbox">100 Continue</pre>
+
+<h2 id="Specifiche">Specifiche</h2>
+
+<table class="standard-table" style="font-family: Arial,x-locale-body,sans-serif; font-size: 1rem; letter-spacing: -0.00278rem;">
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Title</th>
+  </tr>
+  <tr>
+   <td>{{RFC("7231", "100 Continue" , "6.2.1")}}</td>
+   <td>Hypertext Transfer Protocol (HTTP/1.1): Semantica e Contenuti</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Compatibilità_con_i_browser">Compatibilità con i browser</h2>
+
+<p class="hidden">La tabella di compatibilità di questa pagina è stata generata da dati strutturati. Se vorresti contribuire ai dati, per favore controlla <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> e inviaci una pull request.</p>
+
+<p>{{Compat("http.status.100")}}</p>
+
+<h2 id="Vedi_anche">Vedi anche</h2>
+
+<ul>
+ <li>{{HTTPHeader("Expect")}}</li>
+ <li>{{HTTPStatus(417)}}</li>
+</ul>
diff --git a/files/it/web/http/status/101/index.html b/files/it/web/http/status/101/index.html
new file mode 100644
index 0000000000..7e9c0e940f
--- /dev/null
+++ b/files/it/web/http/status/101/index.html
@@ -0,0 +1,51 @@
+---
+title: 101 switch di protocolli
+slug: Web/HTTP/Status/101
+tags:
+  - HTTP
+  - HTTP Status Code
+  - Referenza
+  - WebSockets
+translation_of: Web/HTTP/Status/101
+---
+<div>{{HTTPSidebar}}</div>
+
+<p>Il codice di risposta (response) HTTP <code><strong>101 Switching Protocols</strong></code> indica il protocollo cui il server sta passando, come richiesto dal client che ha inviato il messaggio includendo {{HTTPHeader("Upgrade")}} nell'header della richiesta.</p>
+
+<p>In questa risposta il server include l'header {{HTTPHeader("Upgrade")}} che indica qual'è il protocollo adottato. Il processo è descritto in dettaglio nell'articolo <a href="/en-US/docs/Web/HTTP/Protocol_upgrade_mechanism">Protocol upgrade mechanism</a>.</p>
+
+<h2 id="Status">Status</h2>
+
+<pre class="syntaxbox">101 Switching Protocols</pre>
+
+<h2 id="Esempi">Esempi</h2>
+
+<p>Switching protocols può essere usato con <a href="/en-US/docs/Web/API/WebSockets_API">WebSockets</a>.</p>
+
+<pre>HTTP/1.1 101 Switching Protocols
+Upgrade: websocket
+Connection: Upgrade</pre>
+
+<h2 id="Specifiche">Specifiche</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Title</th>
+  </tr>
+  <tr>
+   <td>{{RFC("7231", "101 Switching Protocol" , "6.2.2")}}</td>
+   <td>Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Vedi_anche">Vedi anche</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/HTTP/Protocol_upgrade_mechanism">Protocol upgrade mechanism</a></li>
+ <li><a href="/en-US/docs/Web/API/WebSockets_API">WebSockets</a></li>
+ <li>{{HTTPHeader("Upgrade")}}</li>
+ <li>{{HTTPStatus("426")}} <code>Upgrade Required</code></li>
+</ul>
diff --git a/files/it/web/http/status/200/index.html b/files/it/web/http/status/200/index.html
new file mode 100644
index 0000000000..8350428043
--- /dev/null
+++ b/files/it/web/http/status/200/index.html
@@ -0,0 +1,55 @@
+---
+title: 200 OK
+slug: Web/HTTP/Status/200
+tags:
+  - Codici di stato
+  - HTTP
+  - Successo
+translation_of: Web/HTTP/Status/200
+---
+<div>{{HTTPSidebar}}</div>
+
+<p>Il codice di successo di risposta <strong><code>200 OK</code></strong> indica che la richiesta ha avuto successo.<br>
+ Una risposta 200 è inserita nella cache di default.</p>
+
+<p>Il significato di successo dipende dal metodo HTTP di richiesta:</p>
+
+<ul>
+ <li>{{HTTPMethod("GET")}}: La risorsa è stata presa in carico e trasmessa nel corpo del messaggio.</li>
+ <li>{{HTTPMethod("HEAD")}}: Le intestazioni dell'entità sono nel corpo del messaggio.</li>
+ <li>{{HTTPMethod("POST")}}: La risorsa che descrive il risultato dell'azione è nel corpo del messaggio.</li>
+ <li>{{HTTPMethod("TRACE")}}: Il corpo del messaggio contiene la richiesta del messaggio come ricevuta dal server.</li>
+</ul>
+
+<p>Il risultato di successo di un {{HTTPMethod("PUT")}} o di un {{HTTPMethod("DELETE")}} spesso non è un <code>200</code> <code>OK</code> ma un {{HTTPStatus("204")}} <code>No Content</code> (o un {{HTTPStatus("201")}} <code>Created</code> quando la risorsa è caricata per la prima volta.</p>
+
+<h2 id="Stato">Stato</h2>
+
+<pre class="syntaxbox">200 OK</pre>
+
+<h2 id="Specifiche">Specifiche</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Specifica</th>
+   <th scope="col">Titolo</th>
+  </tr>
+  <tr>
+   <td>{{RFC("7231", "200 OK" , "6.3.1")}}</td>
+   <td>Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Compatibilità_Browser">Compatibilità Browser</h2>
+
+<p class="hidden">The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</p>
+
+<p>{{Compat("http.status.200")}}</p>
+
+<h2 id="Vedi_anche">Vedi anche</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/HTTP/Methods">HTTP metodi di richiesta</a></li>
+</ul>
diff --git a/files/it/web/http/status/302/index.html b/files/it/web/http/status/302/index.html
new file mode 100644
index 0000000000..db5c6be595
--- /dev/null
+++ b/files/it/web/http/status/302/index.html
@@ -0,0 +1,50 @@
+---
+title: 302 Found
+slug: Web/HTTP/Status/302
+tags:
+  - HTTP
+  - Redirezione
+translation_of: Web/HTTP/Status/302
+---
+<div>{{HTTPSidebar}}</div>
+
+<p>Lo stato <code><strong>302 Found</strong></code> dell'HyperText Transfer Protocol (HTTP) indica che la risorsa richiesta é stata spostata temporaneamente all'URL definito nell'header {{HTTPHeader("Location")}}. Un browser effettua un redirect a tale pagina ma i motori di ricerca non aggiornano i propri link alla risorsa (in 'linguaggio-SEO', si dice che che il 'link-juice' non é inviato al nuovo URL).</p>
+
+<p>Anche se la specifica richiede che il metodo (e il body) della richiesta non vengano alterati quando al momento del redirect, non tutti gli user-agents si comportano allo stesso modo - ed é ancora possibile incorrere in questo tipo di software problematico. É quindi raccomandato impostare il codice <code>302</code> solo in risposta ai metodi {{HTTPMethod("GET")}} o {{HTTPMethod("HEAD")}}, in quanto la modifica del metodo é esplicitamente proibita in tal caso.</p>
+
+<p>Nei casi in cui si volesse che il metodo venga cambiato in {{HTTPMethod("GET")}}, va piuttosto utilizzato {{HTTPStatus("303", "303 See Other")}}. Ció risulta utile quando si vuole rispondere a un metodo {{HTTPMethod("PUT")}} non con la risorsa aggiornata ma con un messaggio di conferma, del tipo: 'la risorsa XYZ é stata aggiornata con successo'.</p>
+
+<h2 id="Stato">Stato</h2>
+
+<pre class="syntaxbox">302 Found</pre>
+
+<h2 id="Specifiche">Specifiche</h2>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">Specifica</th>
+   <th scope="col">Titolo</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{RFC("7231", "302 Found" , "6.4.3")}}</td>
+   <td>Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Compatibilità_Browser">Compatibilità Browser</h2>
+
+
+
+<p>{{Compat("http.status.302")}}</p>
+
+<h2 id="Vedi_anche">Vedi anche</h2>
+
+<ul>
+ <li>{{HTTPStatus("307", "307 Temporary Redirect")}}, the equivalent of this status code where the method used never changes.</li>
+ <li>{{HTTPStatus("303", "303 See Other")}}, a temporary redirect that changes the method used to {{HTTPMethod("GET")}}.</li>
+ <li>{{HTTPStatus("301", "301 Moved Permanently")}}, the permanent redirect.</li>
+</ul>
diff --git a/files/it/web/http/status/404/index.html b/files/it/web/http/status/404/index.html
new file mode 100644
index 0000000000..011dcc3553
--- /dev/null
+++ b/files/it/web/http/status/404/index.html
@@ -0,0 +1,62 @@
+---
+title: 404 Not Found
+slug: Web/HTTP/Status/404
+tags:
+  - Browser
+  - Codice di stato
+  - Errore lato cliente
+  - HTTP
+  - Stato
+translation_of: Web/HTTP/Status/404
+---
+<div>{{HTTPSidebar}}</div>
+
+<p>Il codice di risposta <code><strong>404 Not Found</strong></code> indica che il server non è riuscito a trovare la risorsa richiesta. I collegamenti (link) che portano a una pagina 404 sono spesso il risultato di chiamate errate o collegamenti non più attivi, e possono essere dovuti a fenomeni di server non più attivi (<a href="https://en.wikipedia.org/wiki/Link_rot">link rot</a>).</p>
+
+<p>Un codice di stato 404 non fornisce indicazioni il merito al fatto che si tratti di una risorsa non trovata temporaneamente o permanentemente. Se una risorsa è stata permanentemente eliminata, il server che la ospitava dovrebbe restiture un codice {{HTTPStatus(410)}} (Gone) invece dello stato 404.</p>
+
+<h2 id="Stato">Stato</h2>
+
+<pre class="syntaxbox">404 Not Found</pre>
+
+<h2 id="Pagine_di_errore_personalizzate">Pagine di errore personalizzate</h2>
+
+<p>Molti siti web personalizzano l'aspetto di una pagina 404 in modo che sia di maggior aiuto all'utente indicando magari quali azioni può intraprendere per arrivare alla pagina desiderata. I server Apache possono essere confiugrati per restituire una pagina personalizzata modificando il file <strong><code>.htaccess</code></strong> e introducendo una riga di codice come la seguente.</p>
+
+<pre class="brush: bash">ErrorDocument 404 /notfound.html</pre>
+
+<p>Per un esempio di pagina 404 personalizzata, vedi <a href="https://developer.mozilla.org/en-US/404">MDN's 404 page</a>.</p>
+
+<div class="note">
+<p>Un design personalizzato è un'ottima cosa, ma con moderazione. Puoi rendere la tua pagina 404 divertente e umana, ma cerca di non confondere i tuoi utenti.</p>
+</div>
+
+<h2 id="Specifiche_tecniche">Specifiche tecniche</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Title</th>
+  </tr>
+  <tr>
+   <td>{{RFC("7231", "404 Not Found" , "6.5.4")}}</td>
+   <td>Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Compatibilità_Browser">Compatibilità Browser</h2>
+
+<p class="hidden">The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</p>
+
+<p>{{Compat("http.status.404")}}</p>
+
+<h2 id="Vedi_anche">Vedi anche</h2>
+
+<ul>
+ <li>{{HTTPStatus(410)}}</li>
+ <li>
+  <p>{{interwiki("wikipedia", "HTTP_404", "Wikipedia: HTTP 404")}}</p>
+ </li>
+</ul>
diff --git a/files/it/web/http/status/500/index.html b/files/it/web/http/status/500/index.html
new file mode 100644
index 0000000000..7dd8968d1f
--- /dev/null
+++ b/files/it/web/http/status/500/index.html
@@ -0,0 +1,43 @@
+---
+title: 500 Internal Server Error
+slug: Web/HTTP/Status/500
+translation_of: Web/HTTP/Status/500
+---
+<div>{{HTTPSidebar}}</div>
+
+<p class="syntaxbox"><span class="tlid-translation translation"><span title="">Il codice di risposta, del protocollo HTTP (</span></span> HyperText Transfer Protocol <span class="tlid-translation translation"><span title="">), <strong>"500 Internal Server Error" </strong>indica che il server ha riscontrato una condizione imprevista, che gli ha impedito di andare avanti.</span></span></p>
+
+<p>Questo tipo di risposta all'errore è una generica "catch-all".<span class="tlid-translation translation"> <span title="">A volte, gli amministratori dei server registrano queste risposte di errore con ulteriori dettagli, per impedire che l'errore si verifichi nuovamente in futuro.</span></span></p>
+
+<div class="tlid-result-transliteration-container result-transliteration-container transliteration-container">
+<div class="tlid-transliteration-content transliteration-content full"> </div>
+</div>
+
+<div class="result-footer source-or-target-footer tlid-copy-target"> </div>
+
+<h2 id="Status">Status</h2>
+
+<pre class="syntaxbox">500 Internal Server Error</pre>
+
+<h2 id="Specifications">Specifications</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Title</th>
+  </tr>
+  <tr>
+   <td>{{RFC("7231", "500 Internal Server Error" , "6.6.1")}}</td>
+   <td>Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+<p>The information shown below has been pulled from MDN's GitHub (<a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a>).</p>
+
+<p class="hidden">The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</p>
+
+<p>{{Compat("http.status.500")}}</p>
diff --git a/files/it/web/http/status/index.html b/files/it/web/http/status/index.html
new file mode 100644
index 0000000000..e490502369
--- /dev/null
+++ b/files/it/web/http/status/index.html
@@ -0,0 +1,171 @@
+---
+title: HTTP response status codes
+slug: Web/HTTP/Status
+tags:
+  - HTTP
+  - NeedsTranslation
+  - Status codes
+  - TopicStub
+translation_of: Web/HTTP/Status
+---
+<div>{{HTTPSidebar}}</div>
+
+<p>HTTP response status codes indicate whether a specific <a href="/en-US/docs/Web/HTTP">HTTP</a> request has been successfully completed. Responses are grouped in five classes: informational responses, successful responses, redirects, client errors, and servers errors. Status codes are defined by <a href="https://tools.ietf.org/html/rfc2616#section-10">section 10 of RFC 2616</a>.</p>
+
+<h2 id="Information_responses">Information responses</h2>
+
+<dl>
+ <dt>{{HTTPStatus(100, "100 Continue")}}</dt>
+ <dd>This interim response indicates that everything so far is OK and that the client should continue with the request or ignore it if it is already finished.</dd>
+ <dt>{{HTTPStatus(101, "101 Switching Protocol")}}</dt>
+ <dd>This code is sent in response to an {{HTTPHeader("Upgrade")}} request header by the client, and indicates the protocol the server is switching too.</dd>
+ <dt>{{HTTPStatus(102, "102 Processing")}} ({{Glossary("WebDAV")}})</dt>
+ <dd>This code indicates that the server has received and is processing the request, but no response is available yet.</dd>
+</dl>
+
+<h2 id="Successful_responses">Successful responses</h2>
+
+<dl>
+ <dt>{{HTTPStatus(200, "200 OK")}}</dt>
+ <dd>The request has succeeded. The meaning of a success varies depending on the HTTP method:<br>
+ GET: The resource has been fetched and is transmitted in the message body.<br>
+ HEAD: The entity headers are in the message body.<br>
+ POST: The resource describing the result of the action is transmitted in the message body.<br>
+ TRACE: The message body contains the request message as received by the server</dd>
+ <dt>{{HTTPStatus(201, "201 Created")}}</dt>
+ <dd>The request has succeeded and a new resource has been created as a result of it. This is typically the response sent after a PUT request.</dd>
+ <dt>{{HTTPStatus(202, "202 Accepted")}}</dt>
+ <dd>The request has been received but not yet acted upon. It is non-committal, meaning that there is no way in HTTP to later send an asynchronous response indicating the outcome of processing the request. It is intended for cases where another process or server handles the request, or for batch processing.</dd>
+ <dt>{{HTTPStatus(203, "203 Non-Authoritative Information")}}</dt>
+ <dd>This response code means returned meta-information set is not exact set as available from the origin server, but collected from a local or a third party copy. Except this condition, 200 OK response should be preferred instead of this response.</dd>
+ <dt>{{HTTPStatus(204, "204 No Content")}}</dt>
+ <dd>There is no content to send for this request, but the headers may be useful. The user-agent may update its cached headers for this resource with the new ones.</dd>
+ <dt>{{HTTPStatus(205, "205 Reset Content")}}</dt>
+ <dd>This response code is sent after accomplishing request to tell user agent reset document view which sent this request.</dd>
+ <dt>{{HTTPStatus(206, "206 Partial Content")}}</dt>
+ <dd>This response code is used because of range header sent by the client to separate download into multiple streams.</dd>
+ <dt>{{HTTPStatus(207, "207 Multi-Status")}} ({{Glossary("WebDAV")}})</dt>
+ <dd>A Multi-Status response conveys information about multiple resources in situations where multiple status codes might be appropriate.</dd>
+ <dt>{{HTTPStatus(208, "208 Multi-Status")}} ({{Glossary("WebDAV")}})</dt>
+ <dd>Used inside a DAV: propstat response element to avoid enumerating the internal members of multiple bindings to the same collection repeatedly.</dd>
+ <dt>{{HTTPStatus(226, "226 IM Used")}} (<a href="https://tools.ietf.org/html/rfc3229">HTTP Delta encoding</a>)</dt>
+ <dd>The server has fulfilled a GET request for the resource, and the response is a representation of the result of one or more instance-manipulations applied to the current instance.</dd>
+</dl>
+
+<h2 id="Redirection_messages">Redirection messages</h2>
+
+<dl>
+ <dt>{{HTTPStatus(300, "300 Multiple Choice")}}</dt>
+ <dd>The request has more than one possible responses. User-agent or user should choose one of them. There is no standardized way to choose one of the responses.</dd>
+ <dt>{{HTTPStatus(301, "301 Moved Permanently")}}</dt>
+ <dd>This response code means that URI of requested resource has been changed. Probably, new URI would be given in the response.</dd>
+ <dt>{{HTTPStatus(302, "302 Found")}}</dt>
+ <dd>This response code means that URI of requested resource has been changed <em>temporarily</em>. New changes in the URI might be made in the future. Therefore, this same URI should be used by the client in future requests.</dd>
+ <dt>{{HTTPStatus(303, "303 See Other")}}</dt>
+ <dd>Server sent this response to directing client to get requested resource to another URI with an GET request.</dd>
+ <dt>{{HTTPStatus(304, "304 Not Modified")}}</dt>
+ <dd>This is used for caching purposes. It is telling to client that response has not been modified. So, client can continue to use same cached version of response.</dd>
+ <dt><code>305 Use Proxy</code> {{deprecated_inline}}</dt>
+ <dd>Was defined in a previous version of the HTTP specification to indicate that a requested response must be accessed by a proxy. It has been deprecated due to security concerns regarding in-band configuration of a proxy.</dd>
+ <dt><code>306 unused</code></dt>
+ <dd>This response code is no longer used, it is just reserved currently. It was used in a previous version of the HTTP 1.1 specification.</dd>
+ <dt>{{HTTPStatus(307, "307 Temporary Redirect")}}</dt>
+ <dd>Server sent this response to directing client to get requested resource to another URI with same method that used prior request. This has the same semantic than the <code>302 Found</code> HTTP response code, with the exception that the user agent <em>must not</em> change the HTTP method used: if a <code>POST</code> was used in the first request, a <code>POST</code> must be used in the second request.</dd>
+ <dt>{{HTTPStatus(308, "308 Permanent Redirect")}}</dt>
+ <dd>This means that the resource is now permanently located at another URI, specified by the <code>Location:</code> HTTP Response header. This has the same semantics as the <code>301 Moved Permanently</code> HTTP response code, with the exception that the user agent <em>must not</em> change the HTTP method used: if a <code>POST</code> was used in the first request, a <code>POST</code> must be used in the second request.</dd>
+</dl>
+
+<h2 id="Client_error_responses">Client error responses</h2>
+
+<dl>
+ <dt>{{HTTPStatus(400, "400 Bad Request")}}</dt>
+ <dd>This response means that server could not understand the request due to invalid syntax.</dd>
+ <dt>{{HTTPStatus(401, "401 Unauthorized")}}</dt>
+ <dd>Although the HTTP standard specifies "unauthorized", semantically this response means "unauthenticated". That is, the client must authenticate itself to get the requested response.</dd>
+ <dt><code>402 Payment Required</code></dt>
+ <dd>This response code is reserved for future use. Initial aim for creating this code was using it for digital payment systems however this is not used currently.</dd>
+ <dt>{{HTTPStatus(403, "403 Forbidden")}}</dt>
+ <dd>The client does not have access rights to the content, i.e. they are unauthorized, so server is rejecting to give proper response. Unlike 401, the client's identity is known to the server.</dd>
+ <dt>{{HTTPStatus(404, "404 Not Found")}}</dt>
+ <dd>The server can not find requested resource. In the browser, this means the URL is not recognized. In an API, this can also mean that the endpoint is valid but the resource itself does not exist. Servers may also send this response instead of 403 to hide the existence of a resource from an unauthorized client. This response code is probably the most famous one due to its frequent occurence on the web.</dd>
+ <dt>{{HTTPStatus(405, "405 Method Not Allowed")}}</dt>
+ <dd>The request method is known by the server but has been disabled and cannot be used. For example, an API may forbid DELETE-ing a resource. The two mandatory methods, <code>GET</code> and <code>HEAD</code>, must never be disabled and should not return this error code.</dd>
+ <dt>{{HTTPStatus(406, "406 Not Acceptable")}}</dt>
+ <dd>This response is sent when the web server, after performing <a href="/en-US/docs/HTTP/Content_negotiation#Server-driven_negotiation">server-driven content negotiation</a>, doesn't find any content following the criteria given by the user agent.</dd>
+ <dt>{{HTTPStatus(407, "407 Proxy Authentication Required")}}</dt>
+ <dd>This is similar to 401 but authentication is needed to be done by a proxy.</dd>
+ <dt>{{HTTPStatus(408, "408 Request Timeout")}}</dt>
+ <dd>This response is sent on an idle connection by some servers, even without any previous request by the client. It means that the server would like to shut down this unused connection. This response is used much more since some browsers, like Chrome, Firefox 27+, or IE9, use HTTP pre-connection mechanisms to speed up surfing. Also note that some servers merely shut down the connection without sending this message.</dd>
+ <dt>{{HTTPStatus(409, "409 Conflict")}}</dt>
+ <dd>This response is sent when a request conflicts with the current state of the server.</dd>
+ <dt>{{HTTPStatus(410, "410 Gone")}}</dt>
+ <dd>This response would be sent when the requested content has been permenantly deleted from server, with no forwarding address. Clients are expected to remove their caches and links to the resource. The HTTP specification intends this status code to be used for "limited-time, promotional services". APIs should not feel compelled to indicate resources that have been deleted with this status code.</dd>
+ <dt>{{HTTPStatus(411, "411 Length Required")}}</dt>
+ <dd>Server rejected the request because the <code>Content-Length</code> header field is not defined and the server requires it.</dd>
+ <dt>{{HTTPStatus(412, "412 Precondition Failed")}}</dt>
+ <dd>The client has indicated preconditions in its headers which the server does not meet.</dd>
+ <dt>{{HTTPStatus(413, "413 Payload Too Large")}}</dt>
+ <dd>Request entity is larger than limits defined by server; the server might close the connection or return an <code>Retry-After</code> header field.</dd>
+ <dt>{{HTTPStatus(414, "414 URI Too Long")}}</dt>
+ <dd>The URI requested by the client is longer than the server is willing to interpret.</dd>
+ <dt>{{HTTPStatus(415, "415 Unsupported Media Type")}}</dt>
+ <dd>The media format of the requested data is not supported by the server, so the server is rejecting the request.</dd>
+ <dt>{{HTTPStatus(416, "416 Requested Range Not Satisfiable")}}</dt>
+ <dd>The range specified by the <code>Range</code> header field in the request can't be fulfilled; it's possible that the range is outside the size of the target URI's data.</dd>
+ <dt>{{HTTPStatus(417, "417 Expectation Failed")}}</dt>
+ <dd>This response code means the expectation indicated by the <code>Expect</code> request header field can't be met by the server.</dd>
+ <dt>{{HTTPStatus(418, "418 I'm a teapot")}}</dt>
+ <dd>The server refuses the attempt to brew coffee with a teapot.</dd>
+ <dt>{{HTTPStatus(421, "421 Misdirected Request")}}</dt>
+ <dd>The request was directed at a server that is not able to produce a response. This can be sent by a server that is not configured to produce responses for the combination of scheme and authority that are included in the request URI.</dd>
+ <dt>{{HTTPStatus(422, "422 Unprocessable Entity")}} ({{Glossary("WebDAV")}})</dt>
+ <dd>The request was well-formed but was unable to be followed due to semantic errors.</dd>
+ <dt>{{HTTPStatus(423, "423 Locked")}} ({{Glossary("WebDAV")}})</dt>
+ <dd>The resource that is being accessed is locked.</dd>
+ <dt>{{HTTPStatus(424, "424 Failed Dependency")}} ({{Glossary("WebDAV")}})</dt>
+ <dd>The request failed due to failure of a previous request.</dd>
+ <dt>{{HTTPStatus(426, "426 Upgrade Required")}}</dt>
+ <dd>The server refuses to perform the request using the current protocol but might be willing to do so after the client upgrades to a different protocol. The server sends an {{HTTPHeader("Upgrade")}} header in a 426 response to indicate the required protocol(s).</dd>
+ <dt>{{HTTPStatus(428, "428 Precondition Required")}}</dt>
+ <dd>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.</dd>
+ <dt>{{HTTPStatus(429, "429 Too Many Requests")}}</dt>
+ <dd>The user has sent too many requests in a given amount of time ("rate limiting").</dd>
+ <dt>{{HTTPStatus(431, "431 Request Header Fields Too Large")}}</dt>
+ <dd>The server is unwilling to process the request because its header fields are too large. The request MAY be resubmitted after reducing the size of the request header fields.</dd>
+ <dt>{{HTTPStatus(451, "451 Unavailable For Legal Reasons")}}</dt>
+ <dd>The user requests an illegal resource, such as a web page censored by a government.</dd>
+</dl>
+
+<h2 id="Server_error_responses">Server error responses</h2>
+
+<dl>
+ <dt>{{HTTPStatus(500, "500 Internal Server Error")}}</dt>
+ <dd>The server has encountered a situation it doesn't know how to handle.</dd>
+ <dt>{{HTTPStatus(501, "501 Not Implemented")}}</dt>
+ <dd>The request method is not supported by the server and cannot be handled. The only methods that servers are required to support (and therefore that must not return this code) are <code>GET</code> and <code>HEAD</code>.</dd>
+ <dt>{{HTTPStatus(502, "502 Bad Gateway")}}</dt>
+ <dd>This error response means that the server, while working as a gateway to get a response needed to handle the request, got an invalid response.</dd>
+ <dt>{{HTTPStatus(503, "503 Service Unavailable")}}</dt>
+ <dd>The server is not ready to handle the request. Common causes are a server that is down for maintenance or that is overloaded. Note that together with this response, a user-friendly page explaining the problem should be sent. This responses should be used for temporary conditions and the <code>Retry-After:</code> HTTP header should, if possible, contain the estimated time before the recovery of the service. The webmaster must also take care about the caching-related headers that are sent along with this response, as these temporary condition responses should usually not be cached.</dd>
+ <dt>{{HTTPStatus(504, "504 Gateway Timeout")}}</dt>
+ <dd>This error response is given when the server is acting as a gateway and cannot get a response in time.</dd>
+ <dt>{{HTTPStatus(505, "505 HTTP Version Not Supported")}}</dt>
+ <dd>The HTTP version used in the request is not supported by the server.</dd>
+ <dt>{{HTTPStatus(506, "506 Variant Also Negotiates")}}</dt>
+ <dd>The server has an internal configuration error: transparent content negotiation for the request results in a circular reference.</dd>
+ <dt>{{HTTPStatus(507, "507 Insufficient Storage")}}</dt>
+ <dd>The server has an internal configuration error: the chosen variant resource is configured to engage in transparent content negotiation itself, and is therefore not a proper end point in the negotiation process.</dd>
+ <dt>{{HTTPStatus(508, "508 Loop Detected")}} ({{Glossary("WebDAV")}})</dt>
+ <dd>The server detected an infinite loop while processing the request.</dd>
+ <dt>{{HTTPStatus(510, "510 Not Extended")}}</dt>
+ <dd>Further extensions to the request are required for the server to fulfill it.</dd>
+ <dt>{{HTTPStatus(511, "511 Network Authentication Required")}}</dt>
+ <dd>The 511 status code indicates that the client needs to authenticate to gain network access.</dd>
+</dl>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a href="https://en.wikipedia.org/wiki/List_of_HTTP_status_codes">List of HTTP status codes on Wikipedia</a></li>
+ <li><a href="http://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml">IANA official registry of HTTP status codes</a></li>
+</ul>