GO-1014 Fix NaN and inf when marshalling json

pkg/lib/mill/image_exif.go

@@ -2,7 +2,6 @@ package mill
 
 import (
 	"bytes"
-	"encoding/json"
 	"image"
 	"io"
 	"path/filepath"
@@ -10,6 +9,8 @@ import (
 	"time"
 
 	"github.com/rwcarlsen/goexif/exif"
+
+	"github.com/anytypeio/go-anytype-middleware/util/jsonutil"
 )
 
 type ImageExifSchema struct {
@@ -140,7 +141,7 @@ func (m *ImageExif) Mill(r io.ReadSeeker, name string) (*Result, error) {
 		Description:  description,
 	}
 
-	b, err := json.Marshal(res)
+	b, err := jsonutil.MarshalSafely(res)
 	if err != nil {
 		return nil, err
 	}

util/jsonutil/json.go

@@ -0,0 +1,24 @@
+package jsonutil
+
+import (
+	"encoding/json"
+	"math"
+	"reflect"
+)
+
+func MarshalSafely(v any) ([]byte, error) {
+	clearStruct(v)
+	return json.Marshal(v)
+}
+
+func clearStruct(res interface{}) {
+	elem := reflect.ValueOf(res).Elem()
+	for i := 0; i < elem.NumField(); i++ {
+		field := elem.Field(i)
+		if kind := field.Kind(); kind == reflect.Float64 {
+			if math.IsNaN(field.Float()) || math.IsInf(field.Float(), 0) {
+				field.SetFloat(0)
+			}
+		}
+	}
+}