HTTP escape character

1,http character escapes

H5 use AJAX to transfer data in the background when the URL will be special symbols, special processing, can only be encoded in order to avoid this happens #   used to flag a specific document location   %23%  to encode special characters         %25&   separating different value pairs of variables          %26+    represents spaces in variable values       %2b/      = Directory path               %2f\      = Directory path              %5c=     used to connect keys and values           %3d?      Indicates the start of the query string   %3f spaces   spaces                        %20.       Period                       &nBsp %2e:       Colon                           special character problems in%3a  url When using URLs for parameter passing, some parameters or URL addresses with Chinese names (or special characters) are often passed, and conversion errors occur during background processing. In some pass-through pages use GB2312, and the Receive page uses UTF8, so that the received parameters may be inconsistent with the original. URLs that are encoded using the server-side UrlEncode function are not the same as the URLs encoded with the encodeURI function of client JavaScript.   2,javascript encoding JavaScript for URL encoding involves 3 functions: Escape,encodeuri,encodeuricomponent, corresponding 3 decoding functions: Unescape, decodeuri,decodeuricomponent   "1" Escape () Method: encodes the specified string using the ISO Latin character set. All space characters, punctuation marks, special characters, and other non-ASCII characters are converted to the character encoding in the%xx format (XX equals the encoded 16-digit number of the character in the character set table). For example, the encoding for a space character is%20. The Unescape method is the opposite. Characters that are not encoded by this method: @ */+  "2" encodeURI () method: Converts the URI string into an escape format string in UTF-8 encoded format. Characters that will not be encoded by this method:! @ # $& * () =:/;? + '   3 ' encodeURIComponent () method: Converts the URI string into an escape format using the UTF-8 encoding format. Compared to encodeURI (), this method encodes more characters, such as characters. So if the string contains several parts of the URI, it cannot be encoded in this way, otherwise the URL will display an error after the/character is encoded. Characters that will not be encoded by this method:! * ()   This, for Chinese strings, if you do not want to convert the string encoding format into UTF-8 format (such as the original page and the target page charset is consistent), only need to use escape. If your page is GB2312 or other encoding, and the page that accepts the parameter is UTF-8 encoded, it is necessary to use encodeURI or encodeuricomponent.   In addition, Encodeuri/encodeuricomponent was introduced after javascript1.5, and escape is available in the javascript1.0 version.  1, pass parameters need to use encodeuricomponent, so that the combined URL will not be # and other special characters truncated.   Example: <script language= "JavaScript" >document.write (' <a href= "http://passport.baidu.com/?logout& Aid=7&u= ' +encodeuricomponent ("http://cang.baidu.com/bruce42") + ' > Exit </a> '); </script> 2, When you make a URL jump, you can use encodeuri  as a whole: Location.href=encodeuri ("http://cang.baidu.com/do/s?word= Baidu &ct=21");  3, JS Use the data can use escape  for example: Search the history record in the Tibetan.  4, escape outputs the%u**** format when encoding Unicode values other than 0-255, and the Escape,encodeuri,encodeuricomponent encoding results are the same in other cases.   Most used should be encodeuricomponent, it is the Chinese, Korean and other special characters into the utf-8 format of the URL encoding, So if you need to use encodeURIComponent to pass parameters to the background, you need the background decoding to Utf-8 support (the encoding in form is the same as the current page encoding)  escape does not encode 69 characters: *,+,-,.,/,@,_, 0-9,a-z,a-zencodeuri does not encode 82 characters:!,#,$,&, ', (,), *,+,,,-,.,/,:,;,=,?,@, _,~,0-9,a-z,a-zencodeuricomponent does not encode 71 characters:!, ', (,),*,-,.,_,~,0-9,a-z,a-z   

HTTP escape character