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Mikubot/plugins/url_title.lua
2015-04-14 20:21:23 +02:00

47 lines
1.1 KiB
Lua

do
function getTitle(page)
local s = page
-- Remove optional spaces from the tags.
s = string.gsub(s, "\n", " ")
s = string.gsub(s, " *< *", "<")
s = string.gsub(s, " *> *", ">")
-- Put all the tags in lowercase.
s = string.gsub(s, "(<[^ >]+)", string.lower)
local i, f, t = string.find(s, "<title>(.+)</title>")
return t or ""
end
function string.ends(str, fin)
return fin=='' or string.sub(str,-string.len(fin)) == fin
end
function run(msg, matches)
local url = matches[1]
if string.ends(url, ".jpg") or string.ends(url, ".gif") or string.ends(url, ".png") then
return
end
local result = http.request(url)
local title = getTitle(result)
-- We don't want 301 (and one Extrawurst for Google), 302, 404 and empty titles
if title == "301 Moved Permanently" or title == "" or title == "404 Not Found" or title == "302 Found" or title == "Moved Permanently" then
print('Invalide, da "'..title..'"')
else
return title
end
end
return {
description = "Postet URL-Titel",
usage = "",
patterns = {
"(https?://[%w-_%.%?%.:/%+=&]+)$",
},
run = run
}
end