fix(ai): fix preserve route_type broken issue in refactor (#13576)

* fix(ai): fix preserve route_type broken issue in refactor

(cherry picked from commit 4d7934b)

kong/llm/drivers/anthropic.lua

@@ -454,6 +454,8 @@ function _M.configure_request(conf)
                       or "/"
   end
 
+  ai_shared.override_upstream_url(parsed_url, conf)
+
   -- if the path is read from a URL capture, ensure that it is valid
   parsed_url.path = string_gsub(parsed_url.path, "^/*", "/")
 

kong/llm/drivers/azure.lua

@@ -114,9 +114,12 @@ function _M.configure_request(conf)
       and ai_shared.operation_map[DRIVER_NAME][conf.route_type].path
       or "/"
     )
+
     parsed_url = socket_url.parse(url)
   end
 
+  ai_shared.override_upstream_url(parsed_url, conf)
+
   -- if the path is read from a URL capture, 3re that it is valid
   parsed_url.path = string_gsub(parsed_url.path, "^/*", "/")
 

kong/llm/drivers/bedrock.lua

@@ -341,7 +341,7 @@ function _M.subrequest(body, conf, http_opts, return_res_table, identity_interfa
   end
 
   local parsed_url = socket_url.parse(f_url)
-  local method = ai_shared.operation_map[DRIVER_NAME][conf.route_type].method  
+  local method = ai_shared.operation_map[DRIVER_NAME][conf.route_type].method
 
   -- do the IAM auth and signature headers
   identity_interface.interface.config.signatureVersion = "v4"
@@ -439,6 +439,8 @@ function _M.configure_request(conf, aws_sdk)
   -- if the path is read from a URL capture, ensure that it is valid
   parsed_url.path = string_gsub(parsed_url.path, "^/*", "/")
 
+  ai_shared.override_upstream_url(parsed_url, conf)
+
   kong.service.request.set_path(parsed_url.path)
   kong.service.request.set_scheme(parsed_url.scheme)
   kong.service.set_target(parsed_url.host, (tonumber(parsed_url.port) or 443))

kong/llm/drivers/cohere.lua

@@ -466,6 +466,9 @@ function _M.configure_request(conf)
                       or "/"
   end
 
+  ai_shared.override_upstream_url(parsed_url, conf)
+
+
   -- if the path is read from a URL capture, ensure that it is valid
   parsed_url.path = string_gsub(parsed_url.path, "^/*", "/")
 

kong/llm/drivers/gemini.lua

@@ -391,6 +391,9 @@ function _M.configure_request(conf, identity_interface)
     parsed_url.path = conf.model.options.upstream_path
   end
 
+  ai_shared.override_upstream_url(parsed_url, conf)
+
+
   -- if the path is read from a URL capture, ensure that it is valid
   parsed_url.path = string_gsub(parsed_url.path, "^/*", "/")
 

kong/llm/drivers/llama2.lua

@@ -263,6 +263,8 @@ end
 function _M.configure_request(conf)
   local parsed_url = socket_url.parse(conf.model.options.upstream_url)
 
+  ai_shared.override_upstream_url(parsed_url, conf)
+
   -- if the path is read from a URL capture, ensure that it is valid
   parsed_url.path = (parsed_url.path and string_gsub(parsed_url.path, "^/*", "/")) or "/"
 

kong/llm/drivers/mistral.lua

@@ -158,6 +158,8 @@ function _M.configure_request(conf)
                       or "/"
   end
 
+  ai_shared.override_upstream_url(parsed_url, conf)
+
   -- if the path is read from a URL capture, ensure that it is valid
   parsed_url.path = (parsed_url.path and string_gsub(parsed_url.path, "^/*", "/")) or "/"
 

kong/llm/drivers/openai.lua

@@ -199,6 +199,8 @@ function _M.configure_request(conf)
                       or "/"
   end
 
+  ai_shared.override_upstream_url(parsed_url, conf)
+
   -- if the path is read from a URL capture, ensure that it is valid
   parsed_url.path = string_gsub(parsed_url.path, "^/*", "/")
 

kong/llm/drivers/shared.lua

@@ -930,6 +930,13 @@ function _M.calculate_cost(query_body, tokens_models, tokens_factor)
   return query_cost, nil
 end
 
+function _M.override_upstream_url(parsed_url, conf)
+  if conf.route_type == "preserve" then
+    parsed_url.path = conf.model.options and conf.model.options.upstream_path
+      or kong.request.get_path()
+  end
+end
+
 -- for unit tests
 _M._count_words = count_words
 

kong/llm/proxy/handler.lua

@@ -445,7 +445,7 @@ function _M:access(conf)
   end
 
   -- execute pre-request hooks for "all" drivers before set new body
-  local ok, err = ai_shared.pre_request(conf_m, parsed_request_body)
+  local ok, err = ai_shared.pre_request(conf_m, parsed_request_body or request_table)
   if not ok then
     return bail(400, err)
   end