I’m working on proxy server with gin and ServeHTTP. 
Actually GET and OPTIONS request works well. But when I trying multiples POST request I get EOF error one in two request. I’ve test to make repeat request without proxy service and its work well, so there is something not working in my code.

Edit :

1. I have test POST proxy with

   

   appendix

   backend server code

   package main
   
   import (
       "fmt"
   
       "github.com/gin-gonic/gin"
   )
   
   func main() {
       fmt.Println("Starting server")
       router := gin.Default()
       router.POST("/*any", func(c *gin.Context) {
           c.JSON(200, gin.H{
               "mes": "hello",
           })
       })
       router.Run(":8888")
   }