new plugin expand.lua

plugins/expand.lua

@@ -0,0 +1,26 @@
+local function run(msg, patterns)
+   local response_body = {}
+   local request_constructor = {
+      url = patterns[1],
+      method = "HEAD",
+      sink = ltn12.sink.table(response_body),
+      headers = {},
+      redirect = false
+   }
+
+   local ok, response_code, response_headers, response_status_line = http.request(request_constructor)
+   if ok and response_headers.location then
+      return response_headers.location
+   else
+      return "Fehler beim Erweitern der URL."
+   end
+end
+
+return {
+   description = "Erweitert eine verkürzte URL",
+   usage = "/expand [URL]: Erweitert einen verkürzten Link",
+   patterns = {
+      "^/expand (https?://[%w-_%.%?%.:/%+=&]+)$"
+   },
+   run = run
+}