feat(http-log): support http_endpoint field to be referenceable

CHANGELOG.md

@@ -134,6 +134,9 @@
 - **OpenTelemetry**: add referenceable attribute to the `headers` field
   that could be stored in vaults.
   [#9611](https://github.com/Kong/kong/pull/9611)
+- **HTTP-Log**: Support `http_endpoint` field to be referenceable
+  [#9714](https://github.com/Kong/kong/pull/9714)
+
 
 #### Hybrid Mode
 

kong/plugins/http-log/schema.lua

@@ -9,7 +9,7 @@ return {
         type = "record",
         fields = {
           -- NOTE: any field added here must be also included in the handler's get_queue_id method
-          { http_endpoint = typedefs.url({ required = true, encrypted = true }) }, -- encrypted = true is a Kong-Enterprise exclusive feature, does nothing in Kong CE
+          { http_endpoint = typedefs.url({ required = true, encrypted = true, referenceable = true }) }, -- encrypted = true is a Kong-Enterprise exclusive feature, does nothing in Kong CE
           { method = { type = "string", default = "POST", one_of = { "POST", "PUT", "PATCH" }, }, },
           { content_type = { type = "string", default = "application/json", one_of = { "application/json" }, }, },
           { timeout = { type = "number", default = 10000 }, },

spec/03-plugins/03-http-log/03-schem-vault_spec.lua

@@ -0,0 +1,45 @@
+local helpers = require "spec.helpers"
+local Entity = require "kong.db.schema.entity"
+local plugins_schema_def = require "kong.db.schema.entities.plugins"
+local conf_loader = require "kong.conf_loader"
+
+local PLUGIN_NAME = "http-log"
+
+
+describe(PLUGIN_NAME .. ": (schema-vault)", function()
+  local plugins_schema = assert(Entity.new(plugins_schema_def))
+
+  lazy_setup(function()
+    local conf = assert(conf_loader(nil, {
+      vaults = "bundled",
+      plugins = "bundled",
+    }))
+
+    local kong_global = require "kong.global"
+    _G.kong = kong_global.new()
+    kong_global.init_pdk(kong, conf)
+
+    local plugin_schema = require("kong.plugins."..PLUGIN_NAME..".schema")
+    assert(plugins_schema:new_subschema(PLUGIN_NAME, plugin_schema))
+  end)
+
+  it("should dereference vault value", function()
+    local env_name = "HTTP_LOG_HTTP_ENDPOINT"
+    local env_value = "http://example.com"
+
+    finally(function()
+      helpers.unsetenv(env_name)
+    end)
+
+    helpers.setenv(env_name, env_value)
+
+    local entity = plugins_schema:process_auto_fields({
+      name = PLUGIN_NAME,
+      config = {
+        http_endpoint = "{vault://env/http-log-http-endpoint}"
+      },
+    }, "select")
+
+    assert.equal(env_value, entity.config.http_endpoint)
+  end)
+end)