update to 4.0

rule_sample/sample_modify_request_data.js

@@ -0,0 +1,18 @@
+/*
+  sample:
+    modify the post data towards http://httpbin.org/post
+  test:
+    curl -H "Content-Type: text/plain" -X POST -d 'original post data' http://httpbin.org/post --proxy http://127.0.0.1:8001
+  expected response:
+    { "data": "i-am-anyproxy-modified-post-data" }
+*/
+module.exports = {
+  summary: 'Rule to modify request data',
+  *beforeSendRequest(requestDetail) {
+    if (requestDetail.url.indexOf('http://httpbin.org/post') === 0) {
+      return {
+        requestData: 'i-am-anyproxy-modified-post-data'
+      };
+    }
+  },
+};