update

app.lua

@@ -1 +1,13 @@
-ngx.say("The URI is: ", ngx.var.uri)
+local uri = ngx.var.uri
+ngx.req.read_body()
+local headers = ngx.req.get_headers()
+local body = ngx.req.get_body_data()
+
+ngx.say("URI: ", ngx.var.uri)
+ngx.say("User-Agent: ", headers["User-Agent"])
+
+if body then
+  ngx.say("Body: ", body)
+else
+  ngx.say("Body is empty")
+end