[Minor] Skip bitcoin address check for very long words

Exclude very long words (which can be extracted e. g. from some text
attachments) from bitcoin address check to avoid excessive resource
usage.

diff --git a/rules/bitcoin.lua b/rules/bitcoin.lua
index 3cf97fcbee022f560e1d6027c443d02ec1f570a6..731bf46720999da43880dc31a5632d59017fba79 100644 (file)
--- a/rules/bitcoin.lua
+++ b/rules/bitcoin.lua
@@ -184,7 +184,8 @@ config.regexp['BITCOIN_ADDR'] = {
   re = string.format('(%s) + (%s) > 0', normal_wallet_re, btc_bleach_re),
   re_conditions = {
     [normal_wallet_re] = function(task, txt, s, e)
-      if e - s <= 2 then
+      local len = e - s
+      if len <= 2 or len > 1024 then
         return false
       end
 
@@ -205,7 +206,8 @@ config.regexp['BITCOIN_ADDR'] = {
       end
     end,
     [btc_bleach_re] = function(task, txt, s, e)
-      if e - s <= 2 then
+      local len = e - s
+      if len <= 2 or len > 1024 then
         return false
       end