Set HTTP Request Body Size in Go
Use http.MaxBytesReader to limit and control the size HTTP request body. This is a good practice to prevent abuse and save bandwidth. In the example below, I set a 20 bytes HTTP request body size limit. package main import ( "github.com/julienschmidt/httprouter" "io" "log" "net/http" "time" ) func main() { router := httprouter.New() router.HandlerFunc(http.MethodPost, "/", func(w http.ResponseWriter, r *http.Request) { buffer, err := io.ReadAll(http.MaxBytesReader(w, r.Body, 20)) defer r.Body.Close() if err != nil { w.WriteHeader(http.StatusBadRequest) log.Println(string(buffer)) return } log.Println(string(buffer)) }) httpServer := &http.Server{ Addr: ":8080", Handler: router, ReadTimeout: 120 * time.Second, WriteTimeout: 120 * time.Second, } log.Fatal(httpServer.ListenAndServe()) } Test Content Length 20 bytes ...