From 1f318bcd00ba5cb26657050810c3f43cbdce5581 Mon Sep 17 00:00:00 2001
From: steckbrief <steckbrief@chefmail.de>
Date: Thu, 4 May 2017 13:15:42 +0200
Subject: Added functionality to list files transferred using
 urn:xmpp:filetransfer:http

---
 .../mod_http_upload_external.lua                   | 92 +++++++++++++++++++++-
 1 file changed, 91 insertions(+), 1 deletion(-)

diff --git a/prosody-module/mod_http_upload_external/mod_http_upload_external.lua b/prosody-module/mod_http_upload_external/mod_http_upload_external.lua
index a9b4551..8ed7da1 100644
--- a/prosody-module/mod_http_upload_external/mod_http_upload_external.lua
+++ b/prosody-module/mod_http_upload_external/mod_http_upload_external.lua
@@ -34,6 +34,87 @@ module:add_extension(dataform {
         { name = "filetransfer-manager-ui-url", type = "text-single" },
 }:form({ ["filetransfer-manager-ui-url"] = filetransfer_manager_ui_url }, "result"));
 
+local function listfiles(origin, orig_from, stanza, request)
+   -- build the body
+   local reqbody = "xmpp_server_key=" .. xmpp_server_key .. "&slot_type=list&user_jid=" .. orig_from;
+   -- the request
+   local respbody, statuscode = http.request(external_url, reqbody);
+   -- respbody is nil in case the server is not reachable
+   if respbody ~= nil then
+     respbody = string.gsub(respbody, "\\/", "/");
+   end
+  
+   local filelistempty = true;
+   local list;
+  
+   -- check the response
+   if statuscode == 500 then
+     origin.send(st.error_reply(stanza, "cancel", "service-unavailable", respbody));
+     return true;
+   elseif statuscode == 406 or statuscode == 400 or statuscode == 403 then
+     local errobj, pos, err = json.decode(respbody);
+     if err then
+        origin.send(st.error_reply(stanza, "wait", "internal-server-error", err));
+        return true;
+     elseif errobj["err_code"] ~= nil and errobj["msg"] ~= nil then
+        if statuscode == 403 then
+             origin.send(st.error_reply(stanza, "cancel", "internal-server-error", errobj.msg));
+           return true;
+        else
+           origin.send(st.error_reply(stanza, "cancel", "undefined-condition", "msg or err_code not found"));
+           return true;
+        end
+     end
+  elseif statuscode == 200 then
+    local respobj, pos, err = json.decode(respbody);
+    if err then
+       origin.send(st.error_reply(stanza, "wait", "internal-server-error", err));
+       return true;
+    else
+      -- process json response
+      list = respobj.list;
+      filelistempty = list == nil or next(list) == nil;
+    end
+  else
+    origin.send(st.error_reply(stanza, "cancel", "undefined-condition", "status code: " .. statuscode .. " response: " ..respbody));
+    return true;
+  end
+  
+  local addedfiles = 0;
+  local reply = st.reply(stanza);
+  reply:tag("list", {xmlns=xmlns_http_upload});
+  if filelistempty == false then
+    for i, file in ipairs(list) do
+      local url = file.url;
+      if url == "" then
+        url = nil;
+      end
+      local fileinfo = file.fileinfo;
+      local sender = file.sender_jid;
+      if sender == nil then
+        sender = "";
+      end
+      local recipient = file.recipient_jid;
+      local sent_time = file.sent_time;
+      -- only add file if fileinfo is present
+      if fileinfo ~= nil then
+        addedfiles = addedfiles + 1;
+        reply:tag("file", {timestamp = tostring(sent_time), from = tostring(sender), to = recipient});
+        reply:tag("url"):text(url):up();
+        reply:tag("file-info");
+        reply:tag("filename"):text(fileinfo.filename):up();
+        reply:tag("size"):text(fileinfo.filesize):up();
+        reply:tag("content-type"):text(fileinfo.content_type):up():up():up();
+      end
+    end
+  end
+  if filelistempty or addedfiles == 0 then
+    reply:tag("empty"):up();
+  end
+  origin.send(reply);
+  return true;
+end
+
 -- hooks
 module:hook("iq/host/"..xmlns_http_upload..":request", function (event)
    local stanza, origin = event.stanza, event.origin;
@@ -70,10 +151,16 @@ module:hook("iq/host/"..xmlns_http_upload..":request", function (event)
         return true;
      end
 
+     local recipient = request.attr.recipient;
+     if not recipient then
+       origin.send(st.error_reply(stanza, "modify", "bad-request", "Missing or invalid recipient"));
+       return true;
+     end
+
      local content_type = request:get_child_text("content-type");
      
      -- build the body
-     local reqbody = "xmpp_server_key=" .. xmpp_server_key .. "&slot_type=upload&size=" .. filesize .. "&filename=" .. filename .. "&user_jid=" .. orig_from;
+     local reqbody = "xmpp_server_key=" .. xmpp_server_key .. "&slot_type=upload&size=" .. filesize .. "&filename=" .. filename .. "&user_jid=" .. orig_from .. "&recipient_jid=" .. recipient;
      if content_type then
         reqbody = reqbody .. "&content_type=" .. content_type;
      end
@@ -149,6 +236,7 @@ module:hook("iq/host/"..xmlns_http_upload..":request", function (event)
      else
         -- http file service not reachable
         origin.send(st.error_reply(stanza, "cancel", "undefined-condition", "status code: " .. statuscode));
+        return true;
      end
 
      local reply = st.reply(stanza);
@@ -226,6 +314,8 @@ module:hook("iq/host/"..xmlns_http_upload..":request", function (event)
      reply:tag("slot", { xmlns = xmlns_http_upload });
      reply:tag("deletetoken"):text(delete_token):up();
      origin.send(reply);
+   elseif slot_type == "list" then
+     return listfiles(origin, orig_from, stanza, request);
    else
     origin.send(st.error_reply(stanza, "cancel", "undefined-condition", "status code: " .. statuscode .. " response: " ..respbody));
     return true;
-- 
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