Easy Tutorial
Att Form Method Av Event Abort Tag Dd Att Th Abbr Tag Track Att Input Formnovalidate Att Img Alt Tag Span Att Global Class Canvas Globalcompositeoperation Att Object Form Att Style Scoped Tag Rt Att A Download Att Div Align Att Source Type Av Event Suspend Att Script Defer Att Table Rules Tag Title Att Input Autocomplete Tag Embed Ev Onunload Av Event Canplaythrough Att Link Hreflang Ev Onload Att Input Checked Att Output Name Att Td Align Tag Script Att Body Vlink Av Prop Duration Att Keygen Keytype Att Img Align Att Area Download Att Select Disabled Tag Rp Att Tbody Valign Att Del Cite Av Met Pause Att Textarea Disabled Tag Dialog Tag Input Att Colgroup Align Att Canvas Width Av Prop Currenttime Att Table Align Att Th Char Att Tr Valign Att Button Name Att Select Form Canvas Ispointinpath Att Keygen Name Av Event Error Att Form Name Av Event Play Canvas Putimagedata Att Hr Align Att Col Span Att Embed Src Att Label For Att Form Accept Att Button Formmethod Av Prop Src Tag Tr Tag Picture Att Script Async Att Fieldset Name Ev Onafterprint Att Global Style Att Iframe Height Att Video Poster Att Input Step Ev Onkeydown Att A Shape Av Prop Texttracks Att Option Label Av Prop Error Att Param Value Att Tr Bgcolor Att Form Action Ref Country Codes Att Col Width Att Td Colspan Att Q Cite Att Video Controls Att Input Value Att Th Align Av Prop Videotracks Att Img Height Tag Col Av Prop Played Att Output Form Att Del Datetime Tag U Att Input Multiple Tag Html Att Meta Scheme Canvas Beginpath Html Language Codes Canvas Imagedata Width Tag Dl Ref Eventattributes Ev Ontoggle Att Link Media Att Iframe Name Av Event Loadeddata Tag Sub Att Video Height Att Frame Frameborder Att Dialog Open Att Input Placeholder Att Script Src Att Object Name Att A Rev Att Canvas Height Tag Basefont Att Video Muted Att Table Frame Att Body Text Canvas Transform Tag Q Tag Audio Att Tr Align Tag Main Tag Aside Att Fieldset Form Att Tbody Char Av Prop Paused Att Meta Http Equiv Att Audio Controls 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Canvas Fillstyle Tag P Tag Link Att Object Usemap Att Embed Height Att Input Required Tag Dt Att Button Type Att Global Title Tag Img Att Source Srcset Att Legend Align Tag Thead Att Img Border Att Meta Name Tag Source Ev Onmouseover Att Iframe Marginheight Tag Del Att Global Lang Att Ol Compact Tag Meta Att Hr Size Av Event Stalled Att Ul Type Ref Av Dom Tag Figure Met Element Addeventlistener Canvas Addcolorstop Av Prop Seekable Tag Comment Att A Coords Att Label Form Canvas Shadowoffsety Html Ascii Canvas Shadowblur Att Thead Align Tag Output Att Link Href Tag Iframe Html Head Av Prop Mediagroup Av Prop Controls Canvas Linecap Att Input List Tag Label Att Progress Max Att Global Translate Tag Cite Att Link Rev Att Img Width Att Td Width Tag Footer Att Form Autocomplete Canvas Linejoin Att Area Media Att Meter Optimum Tag A Att Colgroup Charoff Att Global Id Canvas Strokestyle Av Event Seeking Tag Meter Att Area Alt Att Global Dir Att Basefont Size Att Global Contextmenu Att Iframe Seamless Html Symbols Att Frame Src Tag Bdi Att Input Alt Att Meter Value Att Td Abbr Att Object Type Tag Em Att Tr Charoff Att Menu Label Att A Target Att Input Size Canvas Createlineargradient Att Input Height Att Button Formtarget Att Li Value Att Area Nohref Ev Onmousemove Att Body Link Av Prop Buffered Att Global Accesskey Canvas Clearrect Tag Blockquote Att Object Hspace Av Event Loadedmetadata Tag Ruby Att Track Srclang Tag Template Att Dir Compact Att Textarea Readonly Att Button Value Tag Noscript Tag Ins Att A Charset Tag Head Att Textarea Autofocus Att Global Spellcheck Tag Keygen Att Thead Charoff Att Button Formnovalidate Att Caption Align Att Form Target Att Track Label Canvas Scale Att Body Alink Att Optgroup Disabled Att Hr Width Att Iframe Frameborder Js Tutorial Att Input Maxlength Ref Byfunc Att A Name Av Met Addtexttrack Att Font Color Att Th Colspan Html Headings Html Colorpicker Att Thead Valign Html Reference Att Table Width Att Colgroup Width Tag Progress Canvas Linewidth Att Tfoot Char Att Td Char Att Track Index Att Textarea Cols Att Font Size Att Colgroup Char Av Event Waiting Canvas Arc Html Paragraphs Att Audio Preload Att Video Src Att Select Multiple Att Colgroup Valign Att Link Charset Att Track Src Tag Textarea Att Command Disabled Tag Tbody Att P Align Av Prop Preload Av Prop Controller Att Frameset Rows Att Th Bgcolor Att Form Novalidate Att Output For Tag Object Att Input Formtarget Ev Onclick Av Prop Seeking Canvas Imagedata Data Html Formatting Ref Entities Av Prop Muted Att Embed Type Tag Hr Tag Pre Att Global Hidden Av Event Canplay Att Object Height Att Form Accept Charset Html Urlencode Ev Onsubmit Canvas Stroke Tag Button Att Embed Width Tag Section Att Table Summary Av Prop Defaultplaybackrate Ev Onmouseout Att Object Vspace Att Area Target Att Textarea Rows Att Body Background Tag Ul Att Iframe Srcdoc Att Frameset Cols Ref Pxtoemconversion Att Input Width Att Link Target Att Global Dropzone Att A Rel Canvas Getimagedata Att Th Axis Canvas Measuretext Att Textarea Form Tag Td Ev Onmouseup Av Event Playing Html Httpmethods Canvas Createpattern Att Frame Name Att Bdo Dir Att Td Charoff Tag Select Tag Address Att Option Selected Att Button Autofocus Att Select Autofocus Att Iframe Width Html Lists Av Event Ended Att Keygen Disabled Canvas Font Att Td Rowspan Att Command Label Att Video Autoplay Att Ins Datetime Canvas Shadowcolor Att Col Charoff Att Textarea Wrap Att Area Coords Att Link Type Tag Legend Tag Center Tag Body Tag Th Html Elements Att Table Border Ev Onmousedown Tag Datalist Att Input Accept Ev Onshow Att Table Cellspacing Ref Standardattributes Att Input Min Canvas Drawimage Av Event Pause Att Input Max Att Global Contenteditable Tag Frameset Av Prop Ended Att Tbody Align Att Source Src Att Basefont Face Att Option Disabled Att Input Type Att Frame Marginwidth Tag Noframes Att Td Headers Ev Onblur Att Textarea Placeholder Att Details Open Att Img Ismap Tag Code Att Object Align Att Td Valign Av Prop Volume Att Textarea Name Att Textarea Maxlength Att Command Icon Att Command Type Av Met Load Att Base Target Att Button Formenctype Att Audio Autoplay Ref Charactersets Tag Canvas Att Input Disabled Tag Form Att Basefont Color Css Tutorial Att Meter Low Att Button Disabled Tag Colgroup Att Meter Min Att Meter Max Att Hr Noshade Att Table Bgcolor Att Ol Reversed Att Html Xmlns Att Select Size Tag Big Tag Sup Att Img Src Att Table Cellpadding Av Event Seeked Att Video Loop Att Area Shape Html Layout Tag Param Att Video Preload Tag Bdo Att Input Autofocus Canvas Settransform Tag Kbd Att Track Kind Att Menu Type Tag B Av Prop Playbackrate Canvas Clip Tag Time Att Input Form Att Th Charoff Att A Media Att Script Type Att Area Href Att Global Tabindex Att Input Pattern Att Tbody Charoff Att Style Type Av Event Loadstart Att Audio Loop Att Td Scope Canvas Rotate Att A Href Att Th Nowrap Att Frame Scrolling Att Iframe Src Html Iframe Html Keyboardshortcuts Att Object Data Tag Table Ref Canvas Att Form Enctype Tag Ol Att Ul Compact Tag Doctype Att Global Draggable Ev Onchange Tag Hgroup Av Event Ratechange Tag Tt Att Ins Cite Att Td Height Att Progress Value Att Iframe Sandbox Att Li Type Att Map Name Att Input Formenctype Att Tr Char Canvas Miterlimit Att Ol Start Att Video Width Att Td Bgcolor Att Optgroup Label Att Colgroup Span Canvas Textbaseline Tag Samp Att Input Readonly Att Input Src Av Event Progress Att Hn Align Canvas Beziercurveto Tag Li Att Option Value Tag Option Av Prop Defaultmuted Att Img Hspace Colors Mixer Att Meter Form Att Tfoot Align Av Prop Loop Att Html Manifest Tag Nav Att Img Loading Att Global Data Att Input Formaction Att Object Width Av Prop Autoplay Tag Article Av Event Volumechange Av Prop Currentsrc Tag Div Att Iframe Longdesc Att Audio Muted Ev Onkeyup Av Event Durationchange Att Base Href Tag Hn Att Tfoot Valign Tag Figcaption Ev Onkeypress Att Link Rel Html Httpmessages Canvas Quadraticcurveto Av Prop Audiotracks Att Link Sizes Att Meta Content Att Input Name Att Area Rel Att Th Scope Att Blockquote Cite Canvas Translate Tag Acronym Html Emoji Av Prop Networkstate Canvas Imagedata Height Av Prop Startdate Tag Caption Att Frame Marginheight Canvas Closepath Tag Dfn Tag S Ev Onbeforeprint Tag Optgroup Att Iframe Align Att Select Required Canvas Strokerect Av Event Timeupdate Att Th Headers Tag Header Tag Dir Att Time Datetime Tag Area Att Textarea Required Tag Map Canvas Fill Att Command Checked Att Iframe Marginwidth Tag Summary Tag Var Att Script Charset Av Prop Readystate Canvas Textalign Att Th Rowspan Att Img Usemap Att Input Align Att Td Axis Canvas Createimagedata Att Iframe Scrolling Canvas Filltext Att Object Border Att Input Formmethod Att Tfoot Charoff
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HTTP Status Messages

When a browser requests services from a web server, errors may occur.

The following lists a series of HTTP status messages that may be returned:

1xx: Informational

Message Description
100 Continue The server has received part of the request and, if it has not rejected it, the client should continue sending the rest of the request.
101 Switching Protocols The server is switching protocols: the server will comply with the client's request to switch to another protocol.
103 Checkpoint Used for recovery of failed PUT or POST requests when resuming.

2xx: Success

Message Description
200 OK The request was successful (this is the standard response for successful HTTP requests).
201 Created The request has been fulfilled, resulting in the creation of a new resource.
202 Accepted The request has been accepted for processing, but the processing has not been completed.
203 Non-Authoritative Information The request was successful, but some response headers may be incorrect as they are from a copy of the document.
204 No Content The request was successfully processed, but no new document was returned. The browser should continue displaying the original document. This status code is useful if a user regularly refreshes a page and the servlet can determine that the user's document is up to date.
205 Reset Content The request was successfully processed, but no new document was returned. The browser should reset the content it is displaying. This is used to force the browser to clear form input content.
206 Partial Content The client sent a GET request with a Range header, and the server fulfilled it.

3xx: Redirection

Message Description
300 Multiple Choices Multiple options. A list of links. The user can select a link to reach the destination. Up to five addresses are allowed.
301 Moved Permanently The requested page has been moved to a new URL.
302 Found The requested page has been temporarily moved to a new URL.
303 See Other The requested page can be found under a different URL.
304 Not Modified The document has not been modified as expected. The client has a cached version of the document and made a conditional request (usually providing an If-Modified-Since header indicating that the client only wants the document if it is newer than a specified date). The server informs the client that the cached document can still be used.
305 Use Proxy The requested document should be retrieved through the proxy specified in the Location header.
306 Switch Proxy This code is no longer used but is still reserved.
307 Temporary Redirect The requested page has been temporarily moved to a new URL.
308 Resume Incomplete Used for recovery of failed PUT or POST requests when resuming.

4xx: Client Error

Message Description
400 Bad Request Due to a syntax error, the server was unable to understand the request.
401 Unauthorized A valid request, but access to the requested page is forbidden. The requested page requires authentication, and either the client did not provide it or the authentication failed.
402 Payment Required This code is currently not in use.
403 Forbidden A valid request, but access to the requested page is forbidden.
404 Not Found The server could not find the requested page.
405 Method Not Allowed The method specified in the request is not allowed.
406 Not Acceptable The response generated by the server cannot be accepted by the client.
407 Proxy Authentication Required The user must first authenticate using a proxy server for the request to be processed.
408 Request Timeout The request timed out while waiting for the server.
409 Conflict The request could not be completed due to a conflict.
410 Gone The requested page is no longer available.
411 Length Required "Content-Length" is not defined. The server will not accept the request without it.
412 Precondition Failed A precondition given in the request was evaluated as false by the server.
413 Request Entity Too Large The server will not accept the request because the request entity is too large.
414 Request-URI Too Long The server will not accept the request because the URL is too long. This occurs when a POST request is converted to a GET request with a long query information.
415 Unsupported Media Type The server will not accept the request because the media type is not supported.
416 Requested Range Not Satisfiable The client requested a part of the document, but the server cannot provide the requested part.
417 Expectation Failed The server cannot meet the requirements specified in the request header.

5xx: Server Errors

Message: Description:
500 Internal Server Error The request was not completed. The server encountered an unexpected condition.
501 Not Implemented The request was not completed. The server does not support the functionality required to fulfill the request, or the server is unable to complete the request.
502 Bad Gateway The request was not completed. The server, acting as a gateway or proxy, received an invalid response from the upstream server.
503 Service Unavailable The server is currently unavailable (overloaded or down).
504 Gateway Timeout Gateway timeout. The server, acting as a gateway or proxy, did not receive a timely response from the upstream server.
505 HTTP Version Not Supported The server does not support the HTTP protocol version specified in the request.
511 Network Authentication Required The user needs to provide authentication to gain network access.
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