new plugin webshot

plugins/webshot.lua

@@ -0,0 +1,56 @@
+local helpers = require "OAuth.helpers"
+
+local base = 'https://screenshotmachine.com/'
+local url = base .. 'processor.php'
+
+local function get_webshot_url(param)
+   local response_body = {}
+   local request_constructor = {
+      url = url,
+      method = "GET",
+      sink = ltn12.sink.table(response_body),
+      headers = {
+         referer = base,
+         dnt = "1",
+         origin = base,
+         ["User-Agent"] = "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.101 Safari/537.36"
+      },
+      redirect = false
+   }
+
+   local arguments = {
+      urlparam = param,
+      size = "X",
+	  cacheLimit = "0"
+   }
+
+   request_constructor.url = url .. "?" .. helpers.url_encode_arguments(arguments)
+
+   local ok, response_code, response_headers, response_status_line = https.request(request_constructor)
+   if not ok or response_code ~= 200 then
+      return nil
+   end
+
+   local response = table.concat(response_body)
+   return string.match(response, "href='(.-)'")
+end
+
+local function run(msg, matches)
+   local find = get_webshot_url(matches[1])
+   if find then
+      local imgurl = base .. find
+      local receiver = get_receiver(msg)
+      send_photo_from_url(receiver, imgurl)
+   end
+end
+
+
+return {
+   description = "Sendet einen Screenshot einer Webseite.",
+   usage = "/webshot [URL]//scrot [URL]",
+   patterns = {
+      "^/webshot (https?://[%w-_%.%?%.:/%+=&]+)$",
+	  "^/scrot (https?://[%w-_%.%?%.:/%+=&]+)$"
+   },
+   run = run
+}