Move endpoint to download extracted pcap data

scripts/lua/rest/v2/get/pcap/extraction/data.lua

@@ -0,0 +1,50 @@
+--
+-- (C) 2013-24 - ntop.org
+--
+
+local dirs = ntop.getDirs()
+package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
+
+require "lua_utils"
+local json = require "dkjson"
+local recording_utils = require "recording_utils"
+
+--
+-- Download data produced by an extraction by job ID
+-- Example: curl -u admin:admin http://localhost:3000/lua/rest/v2/get/pcap/extraction/data.lua?job_id=1&file_id=1
+--
+
+local function send_error(error_type)
+   local msg = ""
+   if error_type == "not_found" then
+      msg = i18n("traffic_recording.not_found")
+   elseif error_type == "not_granted" then
+      msg = i18n("traffic_recording.error_not_granted")
+   end
+
+   sendHTTPContentTypeHeader('application/json')
+   print(json.encode({error = msg}))
+end
+
+if not recording_utils.isAvailable() then
+  send_error("not_granted")
+elseif isEmptyString(_GET["job_id"]) then
+  send_error("not_found")
+else
+
+  local job_id = tonumber(_GET["job_id"])
+  local file_id = 1
+  if _GET["file_id"] ~= nil then
+    file_id = tonumber(_GET["file_id"])
+  end
+
+  local job_files = recording_utils.getJobFiles(job_id)
+
+  if job_files[file_id] == nil then
+    send_error("not_found")
+  else
+    local file = job_files[file_id]
+    sendHTTPContentTypeHeader('application/vnd.tcpdump.pcap', 'attachment; filename="extraction_'..job_id..'_'..file_id..'.pcap"')
+    ntop.dumpBinaryFile(file)
+  end
+end