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youtube.lua: fix up signature descrambling function name extraction 

Javascript variables can contain other, special characters, also %a
depends on the locale.
This commit is contained in:
Pierre Ynard 2021-10-18 21:32:09 +02:00
parent c7b4efcf75
commit a178691270
1 changed files with 1 additions and 3 deletions
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4
share/lua/playlist/youtube.lua
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@ -123,13 +123,11 @@ function js_descramble( sig, js_url )
end
-- Look for the descrambler function's name
-- if(k.s){var l=k.sp,m=pt(decodeURIComponent(k.s));f.set(l,encodeURIComponent(m))}
-- Descrambler function name - 3 chars length
-- if(h.s){var l=h.sp,m=wja(decodeURIComponent(h.s));f.set(l,encodeURIComponent(m))}
-- k.s (from stream map field "s") holds the input scrambled signature
-- k.sp (from stream map field "sp") holds a parameter name (normally
-- "signature" or "sig") to set with the output, descrambled signature
local descrambler = js_extract( js, "[=%(,&|](%a?%a?%a?)%(decodeURIComponent%(.%.s%)%)" )
local descrambler = js_extract( js, "[=%(,&|](...?)%(decodeURIComponent%(.%.s%)%)" )
if not descrambler then
vlc.msg.dbg( "Couldn't extract youtube video URL signature descrambling function name" )
return sig