删除 content legth

index.js

@@ -139,7 +139,9 @@ module.exports = function (options) {
         }
 
         option.headers = Object.assign({}, ctx.request.headers)
+
         delete option.headers['host']
+        delete option.headers['content-length']
 
         debug(option)
         return new Promise(function (resolve, reject) {