404 Error Wiki
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Status codes 301 Moved Permanently 302 Found 303 See Other 403 Forbidden 404 Not Found 451 Unavailable For Legal Reasons v t e The 404 or Not Found error message is a Hypertext Transfer Protocol (HTTP) standard response internet 404 error code, in computer network communications, to indicate that the client was able to communicate
Error Code 404-16
with a given server, but the server could not find what was requested. The web site hosting server will typically generate a
404 Error Code Means
"404 Not Found" web page when a user attempts to follow a broken or dead link; hence the 404 error is one of the most recognizable errors encountered on the World Wide Web. Contents 1 Overview
Http 404 Fail
2 Custom error pages 2.1 Tracking/Checking 404 errors 3 Phony 404 errors 4 404 substatus error codes defined by IIS 4.1 Slang usage 5 See also 6 References 7 External links Overview[edit] When communicating via HTTP, a server is required to respond to a request, such as a web browser request for a web page, with a numeric response code and an optional, mandatory, or disallowed (based upon the status code) message. 404 error not found wiki In the code 404, the first digit indicates a client error, such as a mistyped Uniform Resource Locator (URL). The following two digits indicate the specific error encountered. HTTP's use of three-digit codes is similar to the use of such codes in earlier protocols such as FTP and NNTP. At the HTTP level, a 404 response code is followed by a human-readable "reason phrase". The HTTP specification suggests the phrase "Not Found"[1] and many web servers by default issue an HTML page that includes both the 404 code and the "Not Found" phrase. A 404 error is often returned when pages have been moved or deleted. In the first case, it is better to employ URL mapping or URL redirection by returning a 301 Moved Permanently response, which can be configured in most server configuration files, or through URL rewriting; in the second case, a 410 Gone should be returned. Because these two options require special server configuration, most websites do not make use of them. 404 errors should not be confused with DNS errors, which appear when the given URL refers to a server name that does not exist. A 404 error indicates that the server itself was found, but that the server was not able to retrieve the requested page. Custom error p
Status codes 301 Moved Permanently 302 Found 303 See Other 403 Forbidden 404 Not Found 451 Unavailable For Legal Reasons v t e In computer error 404 wikipedia networking, HTTP 451 Unavailable For Legal Reasons is an error status code http status code 404 ps4 of the HTTP protocol to be displayed when the user requests a resource which cannot be served 404 error not found movie for legal reasons, such as a web page censored by a government. The number 451 is a reference to Ray Bradbury's 1953 dystopian novel Fahrenheit 451, in which books are https://en.wikipedia.org/wiki/HTTP_404 outlawed.[1] 451 could be described as a more explanatory variant of 403 Forbidden.[2] This status code is standardized in RFC 7725. Examples of situations where an HTTP 451 error code could be displayed include web pages deemed a danger to national security, or web pages deemed to violate copyright, privacy, blasphemy laws, or any other law or court order. https://en.wikipedia.org/wiki/HTTP_451 The RFC is specific that a 451 response does not indicate whether the resource exists but requests for it have been blocked, if the resource has been removed for legal reasons and no longer exists, or even if the resource has never existed, but any discussion of its topic has been legally forbidden (see superinjunction).[3] Some sites have previously returned HTTP 404 (Not Found) or similar if they are not legally permitted to disclose that the resource has been removed. Such a tactic is used in the United Kingdom by some internet service providers utilising the Internet Watch Foundation blacklist, returning a 404 message or another error message instead of showing a message indicating the site is blocked.[4][5] The status code was formally proposed in 2013 by Tim Bray, following earlier informal proposals by Chris Applegate[6] in 2008 and Terence Eden[7] in 2012. It was approved by the IESG on December 18, 2015.[8] It was published as RFC 7725 in February 2016. See also[edit] Technological fix Evil bit Gag order Superinjunction References[edit] ^ Flood, Ali
het gevraagde bestand niet https://nl.wikipedia.org/wiki/Error_404 bestaat. Een van de redenen dat bestanden niet gevonden worden, is linkrot. De beknopte foutmeldingen die de serversoftware geeft, http://whatis.techtarget.com/definition/404-status-code kunnen door websitebeheerders vervangen worden door bijvoorbeeld gebruikersvriendelijkere teksten of een verwijzing naar de algemene hoofdpagina. In samenwerking met Child 404 error Focus is een actie opgesteld waarbij heel wat officiële websites van bedrijven en organisaties hun 404-pagina kunnen wijzigen naar een oproep betreffende een vermiste persoon. Externe links[bewerken] (en) Een voorbeeld van een Error 404-pagina van de server van Wikipedia (keert 404 error not automatisch terug naar deze pagina na 5 seconden) Website van Notfound.org Mediabestanden Zie de categorie HTTP 404 van Wikimedia Commons voor mediabestanden over dit onderwerp. Overgenomen van "https://nl.wikipedia.org/w/index.php?title=Error_404&oldid=47503739" Categorie: World wide webVerborgen categorie: Wikipedia:Commonscat met lokaal zelfde link als op Wikidata Navigatiemenu Persoonlijke instellingen Niet aangemeldOverlegBijdragenRegistrerenAanmelden Naamruimten Artikel Overleg Varianten Weergaven Lezen Bewerken Geschiedenis Meer Zoeken Navigatie HoofdpaginaVind een artikelVandaagEtalageCategorieënRecente wijzigingenNieuwe artikelenWillekeurige pagina Informatie GebruikersportaalSnelcursusHulp en contactDonaties Hulpmiddelen Links naar deze paginaVerwante wijzigingenBestand uploadenSpeciale pagina'sPermanente koppelingPaginagegevensWikidata-itemDeze pagina citeren Afdrukken/exporteren Boek makenDownloaden als PDFPrintvriendelijke versie In andere talen العربيةCatalàکوردیی ناوەندیČeštinaDanskΕλληνικάEnglishEsperantoEspañolفارسیFrançaisGalegoעבריתहिन्दीMagyarBahasa IndonesiaItaliano日本語ಕನ್ನಡ한국어LatviešuМакедонскиNorsk bokmålPolskiPortuguêsРусскийScotsSimple EnglishSlovenščinaShqipСрпски / srpskiSvenskaతెలుగుไทยTürkçeУкраїнськаTiếng Việt中文 Koppelingen bewerken Deze pagina is het laatst bewerkt op 23 sep 2016 om 11:37. De tekst is beschikbaar onder de licentie Creat
Consumer Technology Internet acronyms and lingo 404 (status code) Definition 404 (status code) Facebook Like Tweet Google +1 LinkedIn Email Comment RSS Print A AA AAA Part of the Internet acronyms and lingo glossary: Also see errors . 404 is a frequently-seen status code that tells a Web user that a requested page is "Not found." 404 and other status codes are part of the Web's Hypertext Transfer Protocol ( HTTP ), written in 1992 by the Web's inventor, Tim Berners-Lee. He took many of the status codes from the earlier Internet protocol for transferring files, the File Transfer Protocol ( FTP .) What to Do If You Get a 404If the site no longer exists, there's nothing you can do. However, it only takes one mistyped character to result in a 404. See whether the ".htm" should be an ".html" or vice versa. If you're linking from a Web site, you can do a "View source" to make sure it wasn't miscoded. Whether or not it is, you may want to send a note to the Webmaster so that the link can be fixed for the next users. How to Handle 404s If You Have a Web SiteHere are some things you can do: Use a Web site analysis tool such as Web Trends or Weblog to identify links that result in 404s, then fix the links. If you change the Uniform Resource Locator ( URL ) for a page on your site, retain the old URL as a redirect file, putting a message on it and inserting a META element with a REFRESH to change to the new URL in a specified number of seconds. You can create the page contents for a 404 status code page and substitute it for the 404 page that the browser usually provides. This will allow you to personalize the message and encourage the user to send a note to the Webmaster so that the situation can be fixed.
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