stable 2010-05-24 13:10

1 files changed, 60 insertions, 0 deletions

diff --git a/tex/context/base/data-crl.lua b/tex/context/base/data-crl.lua
new file mode 100644
index 000000000..55b1a8fad
--- /dev/null
+++ b/tex/context/base/data-crl.lua
@@ -0,0 +1,60 @@
+if not modules then modules = { } end modules ['data-crl'] = {
+    version   = 1.001,
+    comment   = "companion to luat-lib.mkiv",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+local gsub = string.gsub
+
+curl = curl or { }
+
+curl.cached    = { }
+curl.cachepath = caches.definepath("curl")
+
+local finders, openers, loaders = resolvers.finders, resolvers.openers, resolvers.loaders
+
+function curl.fetch(protocol, name)
+    local cachename = curl.cachepath() .. "/" .. gsub(name,"[^%a%d%.]+","-")
+--  cachename = gsub(cachename,"[\\/]", io.fileseparator)
+    cachename = gsub(cachename,"[\\]", "/") -- cleanup
+    if not curl.cached[name] then
+        if not io.exists(cachename) then
+            curl.cached[name] = cachename
+            local command = "curl --silent --create-dirs --output " .. cachename .. " " .. name -- no protocol .. "://"
+            os.spawn(command)
+        end
+        if io.exists(cachename) then
+            curl.cached[name] = cachename
+        else
+            curl.cached[name] = ""
+        end
+    end
+    return curl.cached[name]
+end
+
+function finders.curl(protocol,filename)
+    local foundname = curl.fetch(protocol, filename)
+    return finders.generic(protocol,foundname,filetype)
+end
+
+function openers.curl(protocol,filename)
+    return openers.generic(protocol,filename)
+end
+
+function loaders.curl(protocol,filename)
+    return loaders.generic(protocol,filename)
+end
+
+-- todo: metamethod
+
+function curl.install(protocol)
+    finders[protocol] = function (filename,filetype) return finders.curl(protocol,filename) end
+    openers[protocol] = function (filename)          return openers.curl(protocol,filename) end
+    loaders[protocol] = function (filename)          return loaders.curl(protocol,filename) end
+end
+
+curl.install('http')
+curl.install('https')
+curl.install('ftp')