[Fetaure] Add support of custom functions to clickhouse plugin

.luacheckrc

@@ -28,6 +28,7 @@ globals = {
   'rspamd_maps',
   'rspamd_plugins_state',
   'rspamadm',
+  'loadstring'
 }
 
 ignore = {

src/plugins/lua/clickhouse.lua

@@ -36,6 +36,7 @@ local emails_rows = {}
 local specific_rows = {}
 local asn_rows = {}
 local symbols_rows = {}
+local custom_rows = {}
 local nrows = 0
 local connect_prefix = 'http://'
 
@@ -69,6 +70,7 @@ local settings = {
   user = nil,
   password = nil,
   no_ssl_verify = false,
+  custom_rules = {},
   retention = {
     enable = false,
     method = 'detach',
@@ -271,6 +273,12 @@ local function clickhouse_first_row()
     table.insert(symbols_rows,
       clickhouse_symbols_row(settings['symbols_table']))
   end
+
+  for k,rule in pairs(settings.custom_rules) do
+    if not custom_rows[k] then custom_rows[k] = {} end
+    table.insert(custom_rows[k],
+        rule.first_row())
+  end
 end
 
 local function clickhouse_check_symbol(task, symbols, need_score)
@@ -430,6 +438,26 @@ local function clickhouse_send_data(task)
       end
     end
   end
+
+  for k,crows in pairs(custom_rows) do
+    if #crows > 1 then
+      body = table.concat(crows, ' ')
+      if not rspamd_http.request({
+        task = task,
+        url = connect_prefix .. ip_addr,
+        body = body,
+        callback = gen_http_cb('custom data ('..k..')', #crows),
+        mime_type = 'text/plain',
+        timeout = settings['timeout'],
+        no_ssl_verify = settings.no_ssl_verify,
+        user = settings.user,
+        password = settings.password,
+      }) then
+        rspamd_logger.errx(task, "cannot send custom data %s to clickhouse server %s: cannot make request",
+            k, settings['server'])
+      end
+    end
+  end
 end
 
 local function clickhouse_quote(str)
@@ -734,6 +762,12 @@ local function clickhouse_collect(task)
     table.insert(symbols_rows, elt)
   end
 
+  -- Custom data
+  for k,rule in pairs(settings.custom_rules) do
+    if not custom_rows[k] then custom_rows[k] = {} end
+    table.insert(custom_rows[k], rule.get_row(task))
+  end
+
   nrows = nrows + 1
 
   if nrows > settings['limit'] then
@@ -746,6 +780,7 @@ local function clickhouse_collect(task)
     specific_rows = {}
     asn_rows = {}
     symbols_rows = {}
+    custom_rows = {}
     clickhouse_first_row()
   end
 end
@@ -921,7 +956,48 @@ end
 local opts = rspamd_config:get_all_opt('clickhouse')
 if opts then
     for k,v in pairs(opts) do
-      settings[k] = v
+      if k == 'custom_rules' then
+        if not v[1] then
+          v = {v}
+        end
+
+        for i,rule in ipairs(v) do
+          if rule.schema and rule.first_row and rule.get_row then
+            local first_row, get_row
+            local loadstring = loadstring or load
+            local ret, res_or_err = pcall(loadstring(rule.first_row))
+
+            if not ret or type(res_or_err) ~= 'function' then
+              rspamd_logger.errx(rspamd_config, 'invalid first_row (%s) - must be a function',
+                  res_or_err)
+            else
+              first_row = res_or_err
+            end
+
+            ret, res_or_err = pcall(loadstring(rule.get_row))
+
+            if not ret or type(res_or_err) ~= 'function' then
+              rspamd_logger.errx(rspamd_config, 'invalid get_row (%s) - must be a function',
+                  res_or_err)
+            else
+              get_row = res_or_err
+            end
+
+            if first_row and get_row then
+              local name = rule.name or tostring(i)
+              settings.custom_rules[name] = {
+                schema = rule.schema,
+                first_row = first_row,
+                get_row = get_row,
+              }
+            end
+          else
+            rspamd_logger.errx(rspamd_config, 'custom rule has no required attributes: schema, first_row and get_row')
+          end
+        end
+      else
+        settings[k] = v
+      end
     end
 
     if not settings['server'] and not settings['servers'] then
@@ -944,6 +1020,7 @@ if opts then
         return
       end
 
+
       clickhouse_first_row()
       rspamd_config:register_symbol({
         name = 'CLICKHOUSE_COLLECT',
@@ -997,6 +1074,12 @@ if opts then
             for tab,sql in pairs(clickhouse_schema) do
               send_req(tab, rspamd_lua_utils.template(sql, settings))
             end
+
+            for k,rule in pairs(settings.custom_rules) do
+              if rule.schema then
+                send_req(k, rspamd_lua_utils.template(rule.schema, settings))
+              end
+            end
           end
 
           if settings.retention.enable and settings.retention.method ~= 'drop' and settings.retention.method ~= 'detach' then