Module:URL

-- -- This module implements undefined -- -- See unit tests at Module:URL/tests

local p = {} function trim(s) return (mw.ustring.gsub(s, "^%s*(.-)%s*$", "%1")) end

function safeUri(s) local success, uri = pcall(function       return mw.uri.new(s)    end) if success then return uri end end

function p._url(url, text) url = trim(url or '') text = trim(text or '') if url == '' then if text == '' then return mw.getCurrentFrame:expandTemplate{ title = 'tlx', args = { 'URL', "example.com", "optional display text" } } else return text end end -- If the URL contains any unencoded spaces, encode them, because MediaWiki will otherwise interpret a space as the end of the URL. url = mw.ustring.gsub(url, '%s', function(s) return mw.uri.encode(s, 'PATH') end) -- If there is an empty query string or fragment id, remove it as it will cause mw.uri.new to throw an error url = mw.ustring.gsub(url, '#$', '') url = mw.ustring.gsub(url, '%?$', '') -- If it's an HTTP[S] URL without the double slash, fix it. url = mw.ustring.gsub(url, '^[Hh][Tt][Tt][Pp]([Ss]?):(/?)([^/])', 'http%1://%3')

-- Handle URLs from Wikidata of the format http&#58;// url = mw.ustring.gsub(url, '^[Hh][Tt][Tt][Pp]([Ss]?)&#58;//', 'http%1://') local uri = safeUri(url) -- Handle URL's without a protocol and URL's that are protocol-relative, -- e.g. www.example.com/foo or www.example.com:8080/foo, and //www.example.com/foo if uri and (not uri.protocol or (uri.protocol and not uri.host)) and url:sub(1, 2) ~= '//' then url = 'http://' .. url uri = safeUri(url) end if text == '' then if uri then if uri.path == '/' then uri.path = '' end local port = '' if uri.port then port = ':' .. uri.port end text = mw.ustring.lower(uri.host or '') .. port .. (uri.relativePath or '') else -- URL is badly-formed, so just display whatever was passed in           text = url end end

return mw.ustring.format(' [%s %s] ', url, text) end

function p.url(frame) local templateArgs = frame.args local url = templateArgs[1] or '' local text = templateArgs[2] or '' return p._url(url, text) end

return p