imported>PHansen: ..created

2015-01-13T16:49:19Z

..created

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-- From [[:de:Modul:URLutil]]
-- Via [[:en:User:PHansen/URLutil]]

-- Descriptions
-- en: [[:de:Wikipedia:Lua/Modul/URLutil/en]]
-- de: [[:de:Wikipedia:Lua/Modul/URLutil/de]]

-- Test : [[:de:Wikipedia:Lua/Modul/URLutil/Test]]
-- Wikidata: [[:d:Q10859193]]

--[=[ URLutil 2014-09-20
Utilities for URL etc. on www.
* getAuthority()
* getFragment()
* getHost()
* getLocation()
* getPath()
* getPort()
* getQuery()
* getQueryTable()
* getRelativePath()
* getScheme()
* getTLD()
* getTop2domain()
* getTop3domain()
* isAuthority()
* isDomain()
* isDomainExample()
* isDomainInt()
* isHost()
* isIP()
* isIPlocal()
* isIPv4()
* isIPv6()
* isMailAddress()
* isMailLink()
* isProtocolDialog()
* isProtocolWiki()
* isResourceURL()
* isSuspiciousURL()
* isUnescapedURL()
* isWebURL()
* wikiEscapeURL()
Only [[dotted decimal]] notation for IPv4 supported.
Does not support dotted hexadecimal, dotted octal, or single-number formats.
IPv6 URL (bracketed) not yet implemented; might need Wikintax escaping anyway.
]=]

-- table for export
local URLutil = {}

URLutil.getURIScheme = function ( uri )
if type( uri ) == "string" then
local prot, colon, slashes = uri:match( "^%s*([a-zA-Z]*)(:?)(/?/?)" )
if #colon == 1 and #prot >= 2 then
return prot:lower()
elseif #slashes == 2 and #prot == 0 then
return "//"
end
end
return false
end -- getURIScheme()

local getTopDomain = function ( url, mode )
local r = URLutil.getHost( url )
if r then
local pattern = "[%w%%]+%.%a[%w-]*%a)$"
if mode == 3 then
pattern = "[%w%%]+%." .. pattern
end
r = mw.ustring.match( "." .. r, "%.(" .. pattern )
if not r then
r = false
end
else
r = false
end
return r
end -- getTopDomain()

URLutil.getAuthority = function ( url )
local r
if type( url ) == "string" then
local colon, host, port
local pattern = "^%s*%w*:?//([%w%.%%-]+)(:?)([%d]*)/"
local s = mw.text.decode( url )
local i = s:find( "#", 6, true )
if i then
s = s:sub( 1, i - 1 ) .. "/"
else
s = s .. "/"
end
host, colon, port = mw.ustring.match( s, pattern )
if URLutil.isHost( host ) then
host = mw.ustring.lower( host )
if colon == ":" then
if port:find( "^[1-9]" ) then
r = ( host .. ":" .. port )
end
elseif #port == 0 then
r = host
end
end
else
r = false
end
return r
end -- URLutil.getAuthority()

URLutil.getFragment = function ( url, decode )
local r
if type( url ) == "string" then
local s = mw.text.decode( url )
local i = s:find( "#", 1, true )
if i then
r = mw.text.trim( s:sub( i ) ):sub( 2 )
if type( decode ) == "string" then
local encoding = mw.text.trim( decode )
local launch
if encoding == "%" then
launch = true
elseif encoding == "WIKI" then
r = r:gsub( "%.(%x%x)", "%%%1" )
:gsub( "_", " " )
launch = true
end
if launch then
r = mw.uri.decode( r, "PATH" )
end
end
else
r = false
end
else
r = nil
end
return r
end -- URLutil.getFragment()

URLutil.getHost = function ( url )
local r = URLutil.getAuthority( url )
if r then
r = mw.ustring.match( r, "^([%w%.%%-]+):?[%d]*$" )
end
return r
end -- URLutil.getHost()

URLutil.getLocation = function ( url )
local r
if type( url ) == "string" then
r = mw.text.trim( url )
if r == "" then
r = false
else
local i
r = mw.text.decode( r )
i = r:find( "#", 1, true )
if i then
if i == 1 then
r = false
else
r = r:sub( 1, i - 1 )
end
end
end
else
r = nil
end
return r
end -- URLutil.getLocation()

URLutil.getPath = function ( url )
local r = URLutil.getRelativePath( url )
if r then
local s = r:match( "^([^%?]*)%?" )
if s then
r = s
end
s = r:match( "^([^#]*)#" )
if s then
r = s
end
end
return r
end -- URLutil.getPath()

URLutil.getPort = function ( url )
local r = URLutil.getAuthority( url )
if r then
r = r:match( ":([1-9][0-9]*)$" )
if r then
r = tonumber( r )
else
r = false
end
end
return r
end -- URLutil.getPort()

URLutil.getQuery = function ( url, key, separator )
local r = URLutil.getLocation( url )
if r then
r = r:match( "^[^%?]*%?(.+)$" )
if r then
if type( key ) == "string" then
local single = mw.text.trim( key )
local sep = "&"
local s, scan
if type( separator ) == "string" then
s = mw.text.trim( separator )
if s:match( "^[&;,/]$" ) then
sep = s
end
end
s = string.format( "%s%s%s", sep, r, sep )
scan = string.format( "%s%s=([^%s]*)%s",
sep, key, sep, sep )
r = s:match( scan )
end
end
if not r then
r = false
end
end
return r
end -- URLutil.getQuery()

URLutil.getQueryTable = function ( url, separator )
local r = URLutil.getQuery( url )
if r then
local sep = "&"
local n, pairs, s, set
if type( separator ) == "string" then
s = mw.text.trim( separator )
if s:match( "^[&;,/]$" ) then
sep = s
end
end
pairs = mw.text.split( r, sep, true )
n = #pairs
r = { }
for i = 1, n do
s = pairs[ i ]
if s:find( "=", 2, true ) then
s, set = s:match( "^([^=]+)=(.*)$" )
if s then
r[ s ] = set
end
else
r[ s ] = false
end
end -- for i
end
return r
end -- URLutil.getQueryTable()

URLutil.getRelativePath = function ( url )
local r
if type( url ) == "string" then
local s = url:match( "^%s*[a-zA-Z]*://(.*)$" )
if s then
s = s:match( "[^/]+(/.*)$" )
else
local x
x, s = url:match( "^%s*(/?)(/.*)$" )
if x == "/" then
s = s:match( "/[^/]+(/.*)$" )
end
end
if s then
r = mw.text.trim( s )
elseif URLutil.isResourceURL( url ) then
r = "/"
else
r = false
end
else
r = nil
end
return r
end -- URLutil.getRelativePath()

URLutil.getScheme = function ( url )
local r
if type( url ) == "string" then
local pattern = "^%s*([a-zA-Z]*)(:?)(//)"
local prot, colon, slashes = url:match( pattern )
r = false
if slashes == "//" then
if colon == ":" then
if #prot > 2 then
r = prot:lower() .. "://"
end
elseif #prot == 0 then
r = "//"
end
end
else
r = nil
end
return r
end -- URLutil.getScheme()

URLutil.getTLD = function ( url )
local r = URLutil.getHost( url )
if r then
r = mw.ustring.match( r, "[%w]+%.(%a[%w-]*%a)$" )
if not r then
r = false
end
end
return r
end -- URLutil.getTLD()

URLutil.getTop2domain = function ( url )
return getTopDomain( url, 2 )
end -- URLutil.getTop2domain()

URLutil.getTop3domain = function ( url )
return getTopDomain( url, 3 )
end -- URLutil.getTop3domain()

URLutil.isAuthority = function ( s )
local r
if type( s ) == "string" then
local pattern = "^%s*([%w%.%%-]+)(:?)(%d*)%s*$"
local host, colon, port = mw.ustring.match( s, pattern )
if colon == ":" then
port = port:match( "^[1-9][0-9]*$" )
if type( port ) ~= "string" then
r = false
end
elseif port ~= "" then
r = false
end
r = URLutil.isHost( host )
else
r = nil
end
return r
end -- URLutil.isAuthority()

URLutil.isDomain = function ( s )
local r
if type( s ) == "string" then
local scan = "^%s*([%w%.%%-]+%w)%.(%a[%w-]*%a)%s*$"
local scope
s, scope = mw.ustring.match( s, scan )
if type( s ) == "string" then
if mw.ustring.find( s, "^%w" ) then
if mw.ustring.find( s, "..", 1, true ) then
r = false
else
r = true
end
end
end
else
r = nil
end
return r
end -- URLutil.isDomain()

URLutil.isDomainExample = function ( url )
-- RFC 2606: example.com example.net example.org example.edu
local r = getTopDomain( url, 2 )
if r then
local s = r:lower():match( "^example%.([a-z][a-z][a-z])$" )
if s then
r = ( s == "com" or
s == "edu" or
s == "net" or
s == "org" )
else
r = false
end
end
return r
end -- URLutil.isDomainExample()

URLutil.isDomainInt = function ( url )
-- Internationalized Domain Name (Punycode)
local r = URLutil.getHost( url )
if r then
if r:match( "^[!-~]+$" ) then
local s = "." .. r
if s:find( ".xn--", 1, true ) then
r = true
else
r = false
end
else
r = true
end
end
return r
end -- URLutil.isDomainInt()

URLutil.isHost = function ( s )
return URLutil.isDomain( s ) or URLutil.isIP( s )
end -- URLutil.isHost()

URLutil.isIP = function ( s )
return URLutil.isIPv4( s ) and 4 or URLutil.isIPv6( s ) and 6
end -- URLutil.isIP()

URLutil.isIPlocal = function ( s )
-- IPv4 according to RFC 1918, RFC 1122; even any 0.0.0.0 (RFC 5735)
local r = false
local num = s:match( "^ *([01][0-9]*)%." )
if num then
num = tonumber( num )
if num == 0 then
r = s:match( "^ *0+%.[0-9]+%.[0-9]+%.[0-9]+ *$" )
elseif num == 10 or num == 127 then
-- loopback; private/local host: 127.0.0.1
r = URLutil.isIPv4( s )
elseif num == 169 then
-- 169.254.*.*
elseif num == 172 then
-- 172.(16...31).*.*
num = s:match( "^ *0*172%.([0-9]+)%." )
if num then
num = tonumber( num )
if num >= 16 and num <= 31 then
r = URLutil.isIPv4( s )
end
end
elseif beg == 192 then
-- 192.168.*.*
num = s:match( "^ *0*192%.([0-9]+)%." )
if num then
num = tonumber( num )
if num == 168 then
r = URLutil.isIPv4( s )
end
end
end
end
if r then
r = true
end
return r
end -- URLutil.isIPlocal()

URLutil.isIPv4 = function ( s )
local function legal( n )
return ( tonumber( n ) < 256 )
end
local r = false
if type( s ) == "string" then
local p1, p2, p3, p4 = s:match( "^%s*([1-9][0-9]?[0-9]?)%.([12]?[0-9]?[0-9])%.([12]?[0-9]?[0-9])%.([12]?[0-9]?[0-9])%s*$" )
if p1 and p2 and p3 and p4 then
r = legal( p1 ) and legal( p2 ) and legal( p3 ) and legal( p4 )
end
end
return r
end -- URLutil.isIPv4()

URLutil.isIPv6 = function ( s )
local dcolon, groups
if type( s ) ~= "string"
or s:len() == 0
or s:find( "[^:%x]" ) -- only colon and hex digits are legal chars
or s:find( "^:[^:]" ) -- can begin or end with :: but not with single :
or s:find( "[^:]:$" )
or s:find( ":::" )
then
return false
end
s = mw.text.trim( s )
s, dcolon = s:gsub( "::", ":" )
if dcolon > 1 then
return false
end -- at most one ::
s = s:gsub( "^:?", ":" ) -- prepend : if needed, upper
s, groups = s:gsub( ":%x%x?%x?%x?", "" ) -- remove valid groups, and count them
return ( ( dcolon == 1 and groups < 8 ) or
( dcolon == 0 and groups == 8 ) )
and ( s:len() == 0 or ( dcolon == 1 and s == ":" ) ) -- might be one dangling : if original ended with ::
end -- URLutil.isIPv6()

URLutil.isMailAddress = function ( s )
if type( s ) == "string" then
s = mw.ustring.match( s, "^%s*[%w%.%%_-]+@([%w%.%%-]+)%s*$" )
return URLutil.isDomain( s )
end
return false
end -- URLutil.isMailAddress()

URLutil.isMailLink = function ( s )
if type( s ) == "string" then
local addr
s, addr = mw.ustring.match( s, "^%s*([Mm][Aa][Ii][Ll][Tt][Oo]):(%S[%w%.%%_-]*@[%w%.%%-]+)%s*$" )
if type( s ) == "string" then
if s:lower() == "mailto" then
return URLutil.isMailAddress( addr )
end
end
end
return false
end -- URLutil.isMailLink()

local function isProtocolAccepted( prot, supplied )
if type( prot ) == "string" then
local scheme, colon, slashes = mw.ustring.match( prot, "^%s*([a-zA-Z]*)(:?)(/?/?)%s*$" )
if slashes ~= "/" then
if scheme == "" then
if colon ~= ":" and slashes == "//" then
return true
end
elseif colon == ":" or slashes == "" then
local s = supplied:match( " " .. scheme:lower() .. " " )
if type( s ) == "string" then
return true
end
end
end
end
return false
end -- isProtocolAccepted()

URLutil.isProtocolMW = function ( prot )
return isProtocolAccepted( prot,
" http https ftp ftps ssh sftp irc ircs xmpp sip sips gopher telnet nntp worldwind mailto tel sms news svn git mms bitcoin magnet urn geo " )
end -- URLutil.isProtocolMW()

URLutil.isProtocolDialog = function ( prot )
return isProtocolAccepted( prot, " mailto irc ircs ssh telnet " )
end -- URLutil.isProtocolDialog()

URLutil.isProtocolWiki = function ( prot )
return isProtocolAccepted( prot,
" ftp ftps git http https nntp sftp svn worldwind " )
end -- URLutil.isProtocolWiki()

URLutil.isResourceURL = function ( url )
local scheme = URLutil.getScheme( url )
if scheme then
local s = " // http:// https:// ftp:// sftp:// "
s = s:find( string.format( " %s ", scheme ) )
if s then
if URLutil.getAuthority( url ) then
if not url:match( "%S%s+%S" ) then
return true
end
end
end
end
return false
end -- URLutil.isResourceURL()

URLutil.isSuspiciousURL = function ( url )
if URLutil.isResourceURL( url ) then
local s = URLutil.getAuthority( url )
local pat = "[%[|%]" ..
mw.ustring.char( 8201, 45, 8207, 8234, 45, 8239, 8288 )
.. "]"
if s:find( "@" )
or url:find( "''" )
or url:find( pat )
or url:find( "[%.,]$" ) then
return true
end
-- TODO zero width character ??
return false
end
return true
end -- URLutil.isSuspiciousURL()

URLutil.isUnescapedURL = function ( url, trailing )
if type( trailing ) ~= "string" then
if URLutil.isWebURL( url ) then
if url:match( "[%[|%]]" ) then
return true
end
end
end
return false
end -- URLutil.isUnescapedURL()

URLutil.isWebURL = function ( url )
if URLutil.getScheme( url ) and URLutil.getAuthority( url ) then
if not url:match( "%S%s+%S" ) then
return true
end
end
return false
end -- URLutil.isWebURL()

URLutil.wikiEscapeURL = function ( url )
if url:find( "[%[|%]]" ) then
local n
url, n = url:gsub( "%[", "[" )
:gsub( "|", "|" )
:gsub( "%]", "]" )
end
return url
end -- URLutil.wikiEscapeURL()

-- Provide template access and expose URLutil table to require

local p = {}

function p.getURIScheme( frame )
return URLutil.getURIScheme( frame.args[ 1 ] ) or ""
end
function p.getAuthority( frame )
return URLutil.getAuthority( frame.args[ 1 ] ) or ""
end
function p.getFragment( frame )
local r = URLutil.getFragment( frame.args[ 1 ], frame.args[ 2 ] )
if r then
r = "#" .. r
else
r = ""
end
return r
end
function p.getHost( frame )
return URLutil.getHost( frame.args[ 1 ] ) or ""
end
function p.getLocation( frame )
return URLutil.getLocation( frame.args[ 1 ] ) or ""
end
function p.getPath( frame )
return URLutil.getPath( frame.args[ 1 ] ) or ""
end
function p.getPort( frame )
return URLutil.getPort( frame.args[ 1 ] ) or ""
end
function p.getQuery( frame )
local r
local key = frame.args[ 2 ]
if key then
key = mw.text.trim( key )
if key == "" then
key = nil
end
end
r = URLutil.getQuery( frame.args[ 1 ], key, frame.args[ 3 ] )
if r then
if not key then
r = "?" .. r
end
else
r = ""
end
return r
end
function p.getRelativePath( frame )
return URLutil.getRelativePath( frame.args[ 1 ] ) or ""
end
function p.getScheme( frame )
return URLutil.getScheme( frame.args[ 1 ] ) or ""
end
function p.getTLD( frame )
return URLutil.getTLD( frame.args[ 1 ] ) or ""
end
function p.getTop2domain( frame )
return URLutil.getTop2domain( frame.args[ 1 ] ) or ""
end
function p.getTop3domain( frame )
return URLutil.getTop3domain( frame.args[ 1 ] ) or ""
end
function p.isAuthority( frame )
return URLutil.isAuthority( frame.args[ 1 ] ) and "1" or ""
end
function p.isDomain( frame )
return URLutil.isDomain( frame.args[ 1 ] ) and "1" or ""
end
function p.isDomainExample( frame )
return URLutil.isDomainExample( frame.args[ 1 ] ) and "1" or ""
end
function p.isDomainInt( frame )
return URLutil.isDomainInt( frame.args[ 1 ] ) and "1" or ""
end
function p.isHost( frame )
return URLutil.isHost( frame.args[ 1 ] ) and "1" or ""
end
function p.isIP( frame )
return URLutil.isIP( frame.args[ 1 ] ) or ""
end
function p.isIPlocal( frame )
return URLutil.isIPlocal( frame.args[ 1 ] ) and "1" or ""
end
function p.isIPv4( frame )
return URLutil.isIPv4( frame.args[ 1 ] ) and "1" or ""
end
function p.isIPv6( frame )
return URLutil.isIPv6( frame.args[ 1 ] ) and "1" or ""
end
function p.isMailAddress( frame )
return URLutil.isMailAddress( frame.args[ 1 ] ) and "1" or ""
end
function p.isMailLink( frame )
return URLutil.isMailLink( frame.args[ 1 ] ) and "1" or ""
end
function p.isProtocolMW( frame )
return URLutil.isProtocolMW( frame.args[ 1 ] ) and "1" or ""
end
function p.isProtocolDialog( frame )
return URLutil.isProtocolDialog( frame.args[ 1 ] ) and "1" or ""
end
function p.isProtocolWiki( frame )
return URLutil.isProtocolWiki( frame.args[ 1 ] ) and "1" or ""
end
function p.isResourceURL( frame )
return URLutil.isResourceURL( frame.args[ 1 ] ) and "1" or ""
end
function p.isSuspiciousURL( frame )
return URLutil.isSuspiciousURL( frame.args[ 1 ] ) and "1" or ""
end
function p.isUnescapedURL( frame )
return URLutil.isUnescapedURL( frame.args[ 1 ], frame.args[ 2 ] ) and "1" or ""
end
function p.isWebURL( frame )
return URLutil.isWebURL( frame.args[ 1 ] ) and "1" or ""
end
function p.wikiEscapeURL( frame )
return URLutil.wikiEscapeURL( frame.args[ 1 ] )
end
function p.URLutil()
return URLutil
end

return p

Module:Sandbox/PHansen/URLutil - Revision history

imported>PHansen: ..created