Fix size calculation (#434)

* Fix size calculation

CHANGELOG.md

@@ -2,6 +2,7 @@
 - master
   - New
   - Changed
+    - Fixed the way the "size" is calculated, it should match content-length now
     - Fixed output writing so it doesn't silently fail if it needs to create directories recursively
 
 - v1.3.0

pkg/runner/simple.go

@@ -13,7 +13,6 @@ import (
 	"strconv"
 	"strings"
 	"time"
-	"unicode/utf8"
 
 	"github.com/ffuf/ffuf/pkg/ffuf"
 )
@@ -147,7 +146,7 @@ func (r *SimpleRunner) Execute(req *ffuf.Request) (ffuf.Response, error) {
 	}
 
 	if respbody, err := ioutil.ReadAll(httpresp.Body); err == nil {
-		resp.ContentLength = int64(utf8.RuneCountInString(string(respbody)))
+		resp.ContentLength = int64(len(string(respbody)))
 		resp.Data = respbody
 	}