From ee03b919f98032d2c49bd1613a5ca0874790062d Mon Sep 17 00:00:00 2001
From: David <daullmer@gmail.com>
Date: Sun, 12 Jul 2020 20:11:59 +0200
Subject: Fix parsing

---
 .../Json/Converters/JsonDoubleConverter.cs         | 56 ++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 MediaBrowser.Common/Json/Converters/JsonDoubleConverter.cs

(limited to 'MediaBrowser.Common/Json/Converters/JsonDoubleConverter.cs')

diff --git a/MediaBrowser.Common/Json/Converters/JsonDoubleConverter.cs b/MediaBrowser.Common/Json/Converters/JsonDoubleConverter.cs
new file mode 100644
index 0000000000..e5e9f28dae
--- /dev/null
+++ b/MediaBrowser.Common/Json/Converters/JsonDoubleConverter.cs
@@ -0,0 +1,56 @@
+using System;
+using System.Buffers;
+using System.Buffers.Text;
+using System.Globalization;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace MediaBrowser.Common.Json.Converters
+{
+    /// <summary>
+    /// Double to String JSON converter.
+    /// Web client send quoted doubles.
+    /// </summary>
+    public class JsonDoubleConverter : JsonConverter<double>
+    {
+        /// <summary>
+        /// Read JSON string as double.
+        /// </summary>
+        /// <param name="reader"><see cref="Utf8JsonReader"/>.</param>
+        /// <param name="typeToConvert">Type.</param>
+        /// <param name="options">Options.</param>
+        /// <returns>Parsed value.</returns>
+        public override double Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            if (reader.TokenType == JsonTokenType.String)
+            {
+                // try to parse number directly from bytes
+                var span = reader.HasValueSequence ? reader.ValueSequence.ToArray() : reader.ValueSpan;
+                if (Utf8Parser.TryParse(span, out double number, out var bytesConsumed) && span.Length == bytesConsumed)
+                {
+                    return number;
+                }
+
+                // try to parse from a string if the above failed, this covers cases with other escaped/UTF characters
+                if (double.TryParse(reader.GetString(), out number))
+                {
+                    return number;
+                }
+            }
+
+            // fallback to default handling
+            return reader.GetDouble();
+        }
+
+        /// <summary>
+        /// Write double to JSON string.
+        /// </summary>
+        /// <param name="writer"><see cref="Utf8JsonWriter"/>.</param>
+        /// <param name="value">Value to write.</param>
+        /// <param name="options">Options.</param>
+        public override void Write(Utf8JsonWriter writer, double value, JsonSerializerOptions options)
+        {
+            writer.WriteStringValue(value.ToString(NumberFormatInfo.InvariantInfo));
+        }
+    }
+}
-- 
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