Merge pull request #2185 from Bond-009/scanerrors

Fix exceptions while scanning

1 files changed, 53 insertions, 0 deletions

diff --git a/MediaBrowser.Common/Json/Converters/JsonInt32Converter.cs b/MediaBrowser.Common/Json/Converters/JsonInt32Converter.cs
new file mode 100644
index 000000000..fe5dd6cd4
--- /dev/null
+++ b/MediaBrowser.Common/Json/Converters/JsonInt32Converter.cs
@@ -0,0 +1,53 @@
+using System;
+using System.Buffers;
+using System.Buffers.Text;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace MediaBrowser.Common.Json.Converters
+{
+    /// <summary>
+    /// Converts a GUID object or value to/from JSON.
+    /// </summary>
+    public class JsonInt32Converter : JsonConverter<int>
+    {
+        /// <inheritdoc />
+        public override int Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            static void ThrowFormatException() => throw new FormatException("Invalid format for an integer.");
+            ReadOnlySpan<byte> span = stackalloc byte[0];
+
+            if (reader.HasValueSequence)
+            {
+                long sequenceLength = reader.ValueSequence.Length;
+                Span<byte> stackSpan = stackalloc byte[(int)sequenceLength];
+                reader.ValueSequence.CopyTo(stackSpan);
+                span = stackSpan;
+            }
+            else
+            {
+                span = reader.ValueSpan;
+            }
+
+            if (!Utf8Parser.TryParse(span, out int number, out _))
+            {
+                ThrowFormatException();
+            }
+
+            return number;
+        }
+
+        /// <inheritdoc />
+        public override void Write(Utf8JsonWriter writer, int value, JsonSerializerOptions options)
+        {
+            static void ThrowInvalidOperationException() => throw new InvalidOperationException();
+            Span<byte> span = stackalloc byte[16];
+            if (Utf8Formatter.TryFormat(value, span, out int bytesWritten))
+            {
+                writer.WriteStringValue(span.Slice(0, bytesWritten));
+            }
+
+            ThrowInvalidOperationException();
+        }
+    }
+}