tokers commented on a change in pull request #4676:
URL: https://github.com/apache/apisix/pull/4676#discussion_r677052901



##########
File path: apisix/core/ctx.lua
##########
@@ -159,10 +160,22 @@ do
                     val, err = cookie:get(sub_str(key, 8))
                     if err then
                         log.warn("failed to fetch cookie value by key: ",
-                                 key, " error: ", err)
+                                key, " error: ", err)
                     end
                 end
 
+            elseif core_str.has_prefix(key, "arg_") then
+                local args = t.args
+                local arg_key = sub_str(key, 5);

Review comment:
       ```suggestion
                   local arg_key = sub_str(key, 5)
   ```

##########
File path: apisix/core/ctx.lua
##########
@@ -159,10 +160,22 @@ do
                     val, err = cookie:get(sub_str(key, 8))
                     if err then
                         log.warn("failed to fetch cookie value by key: ",
-                                 key, " error: ", err)
+                                key, " error: ", err)
                     end
                 end
 
+            elseif core_str.has_prefix(key, "arg_") then
+                local args = t.args
+                local arg_key = sub_str(key, 5);
+                local m, err = ngx_re_match(args, "(^|&)" .. arg_key .. 
"=([^&]*)(&|$)", "jo")
+                if err then
+                    log.warn("failed to fetch arg value by key: ",
+                            key, " error: ", err)

Review comment:
       ```suggestion
                       log.warn("failed to fetch arg value by key: ",
                                key, " error: ", err)
   ```

##########
File path: apisix/core/ctx.lua
##########
@@ -159,10 +160,22 @@ do
                     val, err = cookie:get(sub_str(key, 8))
                     if err then
                         log.warn("failed to fetch cookie value by key: ",
-                                 key, " error: ", err)
+                                key, " error: ", err)

Review comment:
       Please revert this change, the original indent is good.




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