fix NewBaseline panic

pkg/baseline.go

@@ -50,7 +50,12 @@ func NewBaseline(u, host string, resp *ihttp.Response) *Baseline {
 
 	bl.Raw = append(bl.Header, bl.Body...)
 	bl.Response, err = ParseRawResponse(bl.Raw)
-
+	if err != nil {
+		bl.IsValid = false
+		bl.Reason = ErrResponseError.Error()
+		bl.ErrString = err.Error()
+		return bl
+	}
 	if r := bl.Response.Header.Get("Location"); r != "" {
 		bl.RedirectURL = r
 	} else {

pkg/errors.go

@@ -16,6 +16,7 @@ const (
 	ErrFuzzyRedirect
 	ErrFuzzyNotUnique
 	ErrUrlError
+	ErrResponseError
 )
 
 var ErrMap = map[ErrorType]string{
@@ -32,6 +33,7 @@ var ErrMap = map[ErrorType]string{
 	ErrFuzzyRedirect:       "fuzzy redirect",
 	ErrFuzzyNotUnique:      "not unique",
 	ErrUrlError:            "url parse error",
+	ErrResponseError:       "response parse error",
 }
 
 func (e ErrorType) Error() string {