Unwrap errors in json log output

v2/pkg/output/output.go

@@ -16,6 +16,7 @@ import (
 	"github.com/projectdiscovery/nuclei/v2/pkg/model"
 	"github.com/projectdiscovery/nuclei/v2/pkg/model/types/severity"
 	"github.com/projectdiscovery/nuclei/v2/pkg/operators"
+	"github.com/projectdiscovery/nuclei/v2/pkg/utils"
 )
 
 // Writer is an interface which writes output to somewhere for nuclei events.
@@ -192,8 +193,8 @@ func (w *StandardWriter) Request(templatePath, input, requestType string, reques
 		Input:    input,
 		Type:     requestType,
 	}
-	if requestErr != nil {
-		request.Error = requestErr.Error()
+	if unwrappedErr := utils.UnwrapError(requestErr); unwrappedErr != nil {
+		request.Error = unwrappedErr.Error()
 	} else {
 		request.Error = "none"
 	}

v2/pkg/utils/utils.go

@@ -1,6 +1,7 @@
 package utils
 
 import (
+	"errors"
 	"strings"
 )
 
@@ -11,3 +12,14 @@ func IsBlank(value string) bool {
 func IsNotBlank(value string) bool {
 	return !IsBlank(value)
 }
+
+func UnwrapError(err error) error {
+	for { // get the last wrapped error
+		unwrapped := errors.Unwrap(err)
+		if unwrapped == nil {
+			break
+		}
+		err = unwrapped
+	}
+	return err
+}

v2/pkg/utils/utils_test.go

@@ -0,0 +1,21 @@
+package utils
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestUnwrapError(t *testing.T) {
+	require.Equal(t, nil, UnwrapError(nil))
+
+	errOne := fmt.Errorf("error one")
+	require.Equal(t, errOne, UnwrapError(errOne))
+
+	errTwo := fmt.Errorf("error with error: %w", errOne)
+	require.Equal(t, errOne, UnwrapError(errTwo))
+
+	errThree := fmt.Errorf("error with error: %w", errTwo)
+	require.Equal(t, errOne, UnwrapError(errThree))
+}