fix(router): add preserve_host logic in stream subsystem

kong/router/atc.lua

@@ -655,6 +655,11 @@ function _M:exec(ctx)
 
   else
     route_match_stat(ctx, "pos")
+
+    -- preserve_host logic, modify cache result
+    if match_t.route.preserve_host then
+      match_t.upstream_host = fields.get_value("tls.sni", CACHE_PARAMS)
+    end
   end
 
   return match_t

kong/router/fields.lua

@@ -218,15 +218,20 @@ if is_http then
 end -- is_http
 
 
-local function fields_visitor(fields, params, ctx, cb)
-  for _, field in ipairs(fields) do
-    local func = FIELDS_FUNCS[field]
+local function get_value(field, params, ctx)
+  local func = FIELDS_FUNCS[field]
+
+  if not func then  -- unknown field
+    error("unknown router matching schema field: " .. field)
+  end -- if func
+
+  return func(params, ctx)
+end
 
-    if not func then  -- unknown field
-      error("unknown router matching schema field: " .. field)
-    end -- if func
 
-    local value = func(params, ctx)
+local function fields_visitor(fields, params, ctx, cb)
+  for _, field in ipairs(fields) do
+    local value = get_value(field, params, ctx)
 
     local res, err = cb(field, value)
     if not res then
@@ -352,6 +357,8 @@ end
 
 
 return {
+  get_value = get_value,
+
   get_cache_key = get_cache_key,
   fill_atc_context = fill_atc_context,
 

spec/02-integration/01-helpers/01-helpers_spec.lua

@@ -26,6 +26,7 @@ for _, strategy in helpers.each_strategy() do
       bp.routes:insert {
         hosts     = { "mock_upstream" },
         protocols = { "http" },
+        paths = { "/" },
         service   = service
       }
 

spec/02-integration/05-proxy/02-router_spec.lua

@@ -877,15 +877,16 @@ for _, strategy in helpers.each_strategy() do
     describe("URI arguments (querystring)", function()
       local routes
 
-      before_each(function()
+      lazy_setup(function()
         routes = insert_routes(bp, {
           {
             hosts = { "mock_upstream" },
+            paths = { "/" },
           },
         })
       end)
 
-      after_each(function()
+      lazy_teardown(function()
         remove_routes(strategy, routes)
       end)
 
@@ -1301,6 +1302,7 @@ for _, strategy in helpers.each_strategy() do
         routes = insert_routes(bp, {
           {
             protocols = { "https" },
+            paths = { "/" },
             snis = { "www.example.org" },
             service = {
               name = "service_behind_www.example.org"
@@ -1343,7 +1345,7 @@ for _, strategy in helpers.each_strategy() do
           path    = "/status/201",
           headers = { ["kong-debug"] = 1 },
         })
-        assert.res_status(flavor == "traditional" and 201 or 200, res)
+        assert.res_status(201, res)
         assert.equal("service_behind_www.example.org",
                      res.headers["kong-service-name"])
 
@@ -1365,7 +1367,7 @@ for _, strategy in helpers.each_strategy() do
           path    = "/status/201",
           headers = { ["kong-debug"] = 1 },
         })
-        assert.res_status(flavor == "traditional" and 201 or 200, res)
+        assert.res_status(201, res)
         assert.equal("service_behind_example.org",
                      res.headers["kong-service-name"])
       end)

spec/02-integration/05-proxy/03-upstream_headers_spec.lua

@@ -278,6 +278,7 @@ for _, strategy in helpers.each_strategy() do
 
         assert(bp.routes:insert {
           hosts = { "headers-charset.test" },
+          paths = { "/" },
           service = service,
         })
 

spec/02-integration/05-proxy/14-server_tokens_spec.lua

@@ -291,6 +291,7 @@ describe("headers [#" .. strategy .. "]", function()
       return function()
         bp.routes:insert {
           hosts = { "headers-inspect.test" },
+          paths = { "/" },
         }
 
         local service = bp.services:insert({

spec/03-plugins/07-loggly/01-log_spec.lua

@@ -19,6 +19,7 @@ for _, strategy in helpers.each_strategy() do
 
       local route1 = bp.routes:insert {
         hosts = { "logging.test" },
+        paths = { "/" },
       }
 
       local route2 = bp.routes:insert {

spec/03-plugins/25-oauth2/04-invalidations_spec.lua

@@ -43,6 +43,7 @@ for _, strategy in helpers.each_strategy() do
       route = assert(admin_api.routes:insert {
         hosts     = { "oauth2.com" },
         protocols = { "http", "https" },
+        paths = { "/" },
         service   = service,
       })
 

spec/03-plugins/31-proxy-cache/02-access_spec.lua

@@ -38,6 +38,7 @@ do
 
       local route1 = assert(bp.routes:insert {
         hosts = { "route-1.test" },
+        paths = { "/" },
       })
       local route2 = assert(bp.routes:insert {
         hosts = { "route-2.test" },