Fix capture/runbook.go reading out request body

Fix #342

http.go

@@ -252,21 +252,6 @@ func (rnr *httpRunner) Run(ctx context.Context, r *httpRequest) error {
 		if err := rnr.validator.ValidateRequest(ctx, req); err != nil {
 			return err
 		}
-		// reset Request.Body
-		reqBody, err := r.encodeBody()
-		if err != nil {
-			return err
-		}
-		rc, ok := reqBody.(io.ReadCloser)
-		if !ok && reqBody != nil {
-			rc = io.NopCloser(reqBody)
-		}
-		req.Body = rc
-
-		r.setContentTypeHeader(req)
-		for k, v := range r.headers {
-			req.Header.Set(k, v)
-		}
 
 		res, err = rnr.client.Do(req)
 		if err != nil {

yaml.go

@@ -87,6 +87,11 @@ func CreateHTTPStepMapSlice(key string, req *http.Request) (yaml.MapSlice, error
 			{Key: contentType, Value: f},
 		}
 	case strings.Contains(contentType, MediaTypeMultipartFormData):
+		save, req.Body, err = drainBody(req.Body)
+		if err != nil {
+			return nil, fmt.Errorf("failed to drainBody: %w", err)
+		}
+
 		f := map[string]interface{}{}
 		mr, err := req.MultipartReader()
 		if err != nil {
@@ -131,6 +136,8 @@ func CreateHTTPStepMapSlice(key string, req *http.Request) (yaml.MapSlice, error
 				}
 			}
 		}
+		req.Body = save
+
 		bd = yaml.MapSlice{
 			{Key: MediaTypeMultipartFormData, Value: f},
 		}