Module:URL explained

---- This module implements ---- See unit tests at

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

local function extractUrl(args) for name, val in pairs(args) do if name ~= 2 and name ~= "msg" then local url = name .. "=" .. val; url = mw.ustring.gsub(url, '^[Hh][Tt][Tt][Pp]([Ss]?):(/?)([^/])', 'http%1://%3') local uri = safeUri(url); if uri and uri.host then return url end end endend

function p._url(url, text, msg) url = mw.text.trim(url or ) text = mw.text.trim(text or ) local nomsg = (msg or ):sub(1,1):lower

"n" or msg

'false' -- boolean: true if msg is "false" or starts with n or N

if url

then if text

then if nomsg then return nil else return mw.getCurrentFrame:expandTemplate end 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')

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 )

-- Add before _/.-# sequences text = mw.ustring.gsub(text,"(/+)","%1") -- This entry MUST be the first. "" has a "/" in it, you know. text = mw.ustring.gsub(text,"(%.+)","%1") -- text = mw.ustring.gsub(text,"(%-+)","%1") -- DISABLED for now text = mw.ustring.gsub(text,"(%#+)","%1") text = mw.ustring.gsub(text,"(_+)","%1") 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 parentArgs = frame:getParent.args local url = templateArgs[1] or parentArgs[1] local text = templateArgs[2] or parentArgs[2] or local msg = templateArgs.msg or parentArgs.msg or url = url or extractUrl(templateArgs) or extractUrl(parentArgs) or return p._url(url, text, msg)end

--function p.url2(frame) local templateArgs = frame.args local parentArgs = frame:getParent.args local url = templateArgs[1] or parentArgs[1] local text = templateArgs[2] or parentArgs[2] or -- default to no message local msg = templateArgs.msg or parentArgs.msg or 'no' url = url or extractUrl(templateArgs) or extractUrl(parentArgs) or -- if the url came from a Wikidata call, it might have a pen icon appended -- we want to keep that and add it back at the end. local u1, penicon = mw.ustring.match(url, "(.*)( 

]*>", ""):gsub("[%[%]]", "") -- truncate anything after a space url = url:gsub("%%20", " "):gsub(" .*", "") return (p._url(url, text, msg) or "") .. (penicon or "")end

return p