Migrate code and utilize api/modifiers endpoint

handlers/playground.go

@@ -0,0 +1,41 @@
+package handlers
+
+import (
+	_ "embed"
+	"ladder/proxychain"
+	ruleset_v2 "ladder/proxychain/ruleset"
+
+	"net/http"
+
+	"github.com/gofiber/fiber/v2"
+)
+
+//go:embed playground.html
+var playgroundHtml string
+
+func PlaygroundHandler(path string, opts *ProxyOptions) fiber.Handler {
+	return func(c *fiber.Ctx) error {
+		if c.Method() == fiber.MethodGet {
+			c.Set("Content-Type", "text/html")
+
+			return c.SendString(playgroundHtml)
+		} else if c.Method() == fiber.MethodPost {
+			var modificationData ruleset_v2.Rule
+			if err := c.BodyParser(&modificationData); err != nil {
+				return err
+			}
+
+			c.Method(fiber.MethodGet)
+
+			return proxychain.
+				NewProxyChain().
+				SetFiberCtx(c).
+				WithAPIPath(path).
+				AddOnceRequestModifications(modificationData.RequestModifications...).
+				AddOnceResponseModifications(modificationData.ResponseModifications...).
+				Execute()
+		}
+
+		return c.Status(http.StatusMethodNotAllowed).SendString("Method not allowed")
+	}
+}