feat: change http method and enable rate limit

Author: juzhiyuan

openapi/httpbin.yaml

@@ -17,6 +17,11 @@ paths:
       x-adc-name: httpbin_get
       x-adc-plugins:
         cors: {}
+        limit-count:
+          count: 3
+          time_window: 30
+          reject_code: 429
+          key: remote_addr
       responses:
         '200':
           description: OK
@@ -41,7 +46,7 @@ paths:
           description: Example response (status code depends on path parameter)
 
   /anything:
-    post:
+    get:
       summary: Echo any request data
       tags: [httpbin]
       x-adc-name: httpbin_anything