command! URLencoding call URLencoding()<CR>
function! URLencoding()
  silent s/e/%20/e
  silent s/!/%21/e
  silent s/ /%22/e
  silent s/#/%23/e
  silent s/$/%24/e
  " silent s/%/%25/e
  silent s/&/%26/e
  silent s/'/%27/e
  silent s/(/%28/e
  silent s/)/%29/e
  silent s/*/%2A/e
  silent s/+/%2B/e
  silent s/,/%2C/e
  silent s/\-/%2D/e
  silent s/\./%2E/e
  silent s/\//%2F/e
  silent s/:/%3A/e
  silent s/;/%3B/e
  silent s/</%3C/e
  silent s/=/%3D/e
  silent s/>/%3E/e
  silent s/?/%3F/e
  silent s/@/%40/e
  silent s/\[/%5B/e
  silent s/\\/%5C/e
  silent s/\]/%5D/e
  silent s/\^/%5E/e
  silent s/_/%5F/e
  silent s/`/%60/e
  silent s/{/%7B/e
  silent s/|/%7C/e
  silent s/}/%7D/e
  silent s/~/%7E/e
  silent s/€/%80/e
  silent s/‚/%82/e
  silent s/ƒ/%83/e
  silent s/„/%84/e
  silent s/…/%85/e
  silent s/†/%86/e
  silent s/‡/%87/e
  silent s/ˆ/%88/e
  silent s/‰/%89/e
  silent s/Š/%8A/e
  silent s/‹/%8B/e
  silent s/Œ/%8C/e
  silent s/Ž/%8E/e
  silent s/‘/%91/e
  silent s/’/%92/e
  silent s/“/%93/e
  silent s/”/%94/e
  silent s/•/%95/e
  silent s/–/%96/e
  silent s/—/%97/e
  silent s/˜/%98/e
  silent s/™/%99/e
  silent s/š/%9A/e
  silent s/›/%9B/e
  silent s/œ/%9C/e
  silent s/ž/%9E/e
  silent s/Ÿ/%9F/e
  silent s/¡/%A1/e
  silent s/¢/%A2/e
  silent s/£/%A3/e
  silent s/¥/%A5/e
  silent s/|/%A6/e
  silent s/§/%A7/e
  silent s/¨/%A8/e
  silent s/©/%A9/e
  silent s/ª/%AA/e
  silent s/«/%AB/e
  silent s/¬/%AC/e
  silent s/¯/%AD/e
  silent s/®/%AE/e
  silent s/¯/%AF/e
  silent s/°/%B0/e
  silent s/±/%B1/e
  silent s/²/%B2/e
  silent s/³/%B3/e
  silent s/´/%B4/e
  silent s/µ/%B5/e
  silent s/¶/%B6/e
  silent s/·/%B7/e
  silent s/¸/%B8/e
  silent s/¹/%B9/e
  silent s/º/%BA/e
  silent s/»/%BB/e
  silent s/¼/%BC/e
  silent s/½/%BD/e
  silent s/¾/%BE/e
  silent s/¿/%BF/e
  silent s/À/%C0/e
  silent s/Á/%C1/e
  silent s/Â/%C2/e
  silent s/Ã/%C3/e
  silent s/Ä/%C4/e
  silent s/Å/%C5/e
  silent s/Æ/%C6/e
  silent s/Ç/%C7/e
  silent s/È/%C8/e
  silent s/É/%C9/e
  silent s/Ê/%CA/e
  silent s/Ë/%CB/e
  silent s/Ì/%CC/e
  silent s/Í/%CD/e
  silent s/Î/%CE/e
  silent s/Ï/%CF/e
  silent s/Ð/%D0/e
  silent s/Ñ/%D1/e
  silent s/Ò/%D2/e
  silent s/Ó/%D3/e
  silent s/Ô/%D4/e
  silent s/Õ/%D5/e
  silent s/Ö/%D6/e
  silent s/Ø/%D8/e
  silent s/Ù/%D9/e
  silent s/Ú/%DA/e
  silent s/Û/%DB/e
  silent s/Ü/%DC/e
  silent s/Ý/%DD/e
  silent s/Þ/%DE/e
  silent s/ß/%DF/e
  silent s/à/%E0/e
  silent s/á/%E1/e
  silent s/â/%E2/e
  silent s/ã/%E3/e
  silent s/ä/%E4/e
  silent s/å/%E5/e
  silent s/æ/%E6/e
  silent s/ç/%E7/e
  silent s/è/%E8/e
  silent s/é/%E9/e
  silent s/ê/%EA/e
  silent s/ë/%EB/e
  silent s/ì/%EC/e
  silent s/í/%ED/e
  silent s/î/%EE/e
  silent s/ï/%EF/e
  silent s/ð/%F0/e
  silent s/ñ/%F1/e
  silent s/ò/%F2/e
  silent s/ó/%F3/e
  silent s/ô/%F4/e
  silent s/õ/%F5/e
  silent s/ö/%F6/e
  silent s/÷/%F7/e
  silent s/ø/%F8/e
  silent s/ù/%F9/e
  silent s/ú/%FA/e
  silent s/û/%FB/e
  silent s/ü/%FC/e
  silent s/ý/%FD/e
  silent s/þ/%FE/e
  silent s/ÿ/%FF/e
endfunction

"transformer les caractères URLEncodés en caractères normaux
command! ReverseURLencoding call ReverseURLencoding()<CR>
function! ReverseURLencoding()
  silent s/%20/e/e
  silent s/%21/!/e
  silent s/%22/ /e
  silent s/%23/#/e
  silent s/%24/$/e
  " silent s/%25/%/e
  silent s/%26/&/e
  silent s/%27/'/e
  silent s/%28/(/e
  silent s/%29/)/e
  silent s/%2A/*/e
  silent s/%2B/+/e
  silent s/%2C/,/e
  silent s/%2D/-/e
  silent s/%2E/./e
  silent s/%2F/\//e
  silent s/%3A/:/e
  silent s/%3B/;/e
  silent s/%3C/</e
  silent s/%3D/=/e
  silent s/%3E/>/e
  silent s/%3F/?/e
  silent s/%40/@/e
  silent s/%5B/[/e
  silent s/%5C/\\/e
  silent s/%5D/]/e
  silent s/%5E/^/e
  silent s/%5F/_/e
  silent s/%60/`/e
  silent s/%7B/{/e
  silent s/%7C/|/e
  silent s/%7D/}/e
  silent s/%7E/~/e
  silent s/%80/€/e
  silent s/%82/‚/e
  silent s/%83/ƒ/e
  silent s/%84/„/e
  silent s/%85/…/e
  silent s/%86/†/e
  silent s/%87/‡/e
  silent s/%88/ˆ/e
  silent s/%89/‰/e
  silent s/%8A/Š/e
  silent s/%8B/‹/e
  silent s/%8C/Œ/e
  silent s/%8E/Ž/e
  silent s/%91/‘/e
  silent s/%92/’/e
  silent s/%93/“/e
  silent s/%94/”/e
  silent s/%95/•/e
  silent s/%96/–/e
  silent s/%97/—/e
  silent s/%98/˜/e
  silent s/%99/™/e
  silent s/%9A/š/e
  silent s/%9B/›/e
  silent s/%9C/œ/e
  silent s/%9D/ /e
  silent s/%9E/ž/e
  silent s/%9F/Ÿ/e
  silent s/%A1/¡/e
  silent s/%A2/¢/e
  silent s/%A3/£/e
  silent s/%A5/¥/e
  silent s/%A6/|/e
  silent s/%A7/§/e
  silent s/%A8/¨/e
  silent s/%A9/©/e
  silent s/%AA/ª/e
  silent s/%AB/«/e
  silent s/%AC/¬/e
  silent s/%AD/¯/e
  silent s/%AE/®/e
  silent s/%AF/¯/e
  silent s/%B0/°/e
  silent s/%B1/±/e
  silent s/%B2/²/e
  silent s/%B3/³/e
  silent s/%B4/´/e
  silent s/%B5/µ/e
  silent s/%B6/¶/e
  silent s/%B7/·/e
  silent s/%B8/¸/e
  silent s/%B9/¹/e
  silent s/%BA/º/e
  silent s/%BB/»/e
  silent s/%BC/¼/e
  silent s/%BD/½/e
  silent s/%BE/¾/e
  silent s/%BF/¿/e
  silent s/%C0/À/e
  silent s/%C1/Á/e
  silent s/%C2/Â/e
  silent s/%C3/Ã/e
  silent s/%C4/Ä/e
  silent s/%C5/Å/e
  silent s/%C6/Æ/e
  silent s/%C7/Ç/e
  silent s/%C8/È/e
  silent s/%C9/É/e
  silent s/%CA/Ê/e
  silent s/%CB/Ë/e
  silent s/%CC/Ì/e
  silent s/%CD/Í/e
  silent s/%CE/Î/e
  silent s/%CF/Ï/e
  silent s/%D0/Ð/e
  silent s/%D1/Ñ/e
  silent s/%D2/Ò/e
  silent s/%D3/Ó/e
  silent s/%D4/Ô/e
  silent s/%D5/Õ/e
  silent s/%D6/Ö/e
  silent s/%D8/Ø/e
  silent s/%D9/Ù/e
  silent s/%DA/Ú/e
  silent s/%DB/Û/e
  silent s/%DC/Ü/e
  silent s/%DD/Ý/e
  silent s/%DE/Þ/e
  silent s/%DF/ß/e
  silent s/%E0/à/e
  silent s/%E1/á/e
  silent s/%E2/â/e
  silent s/%E3/ã/e
  silent s/%E4/ä/e
  silent s/%E5/å/e
  silent s/%E6/æ/e
  silent s/%E7/ç/e
  silent s/%E8/è/e
  silent s/%E9/é/e
  silent s/%EA/ê/e
  silent s/%EB/ë/e
  silent s/%EC/ì/e
  silent s/%ED/í/e
  silent s/%EE/î/e
  silent s/%EF/ï/e
  silent s/%F0/ð/e
  silent s/%F1/ñ/e
  silent s/%F2/ò/e
  silent s/%F3/ó/e
  silent s/%F4/ô/e
  silent s/%F5/õ/e
  silent s/%F6/ö/e
  silent s/%F7/÷/e
  silent s/%F8/ø/e
  silent s/%F9/ù/e
  silent s/%FA/ú/e
  silent s/%FB/û/e
  silent s/%FC/ü/e
  silent s/%FD/ý/e
  silent s/%FE/þ/e
  silent s/%FF/ÿ/e
endfunction