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-- filename : luat-crl.lua
-- comment : companion to luat-lib.tex
-- author : Hans Hagen, PRAGMA-ADE, Hasselt NL
-- copyright: PRAGMA ADE / ConTeXt Development Team
-- license : see context related readme files
if not versions then versions = { } end versions['luat-crl'] = 1.001
if not curl then curl = { } end
curl.cachepath = caches.setpath(texmf.instance,"curl")
curl.cached = { }
function curl.fetch(protocol, name)
local cachename = curl.cachepath .. "/" .. file.robustname(name)
cachename = cachename:gsub("[\\/]", io.fileseparator)
if not curl.cached[name] then
if not io.exists(cachename) then
curl.cached[name] = cachename
local command = "curl --silent --create-dirs --output " .. cachename .. " " .. protocol .. "://" .. name
os.execute(command)
end
if io.exists(cachename) then
curl.cached[name] = cachename
else
curl.cached[name] = ""
end
end
return curl.cached[name]
end
function input.finders.curl(instance,protocol,filename)
local foundname = curl.fetch(protocol, filename)
return input.finders.generic(instance,protocol,foundname,filetype)
end
function input.openers.curl(instance,protocol,filename)
return input.openers.generic(instance,protocol,filename)
end
function input.loaders.curl(instance,protocol,filename)
return input.loaders.generic(instance,protocol,filename)
end
-- todo: metamethod
function curl.install(protocol)
input.finders[protocol] = function (instance,filename,filetype) return input.finders.curl(instance,protocol,filename) end
input.openers[protocol] = function (instance,filename) return input.openers.curl(instance,protocol,filename) end
input.loaders[protocol] = function (instance,filename) return input.loaders.curl(instance,protocol,filename) end
end
curl.install('http')
curl.install('https')
curl.install('ftp')
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