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fix: 修复 XmlSerializer 潜在的内存泄漏问题

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Fu Diwei
2021-10-18 17:15:47 +08:00
parent 5d2dc2904f
commit 9e801ce419
3 changed files with 36 additions and 6 deletions
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14
src/SKIT.FlurlHttpClient.Wechat.OpenAI/Utilities/Internal/XmlUtility.cs
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@@ -1,4 +1,5 @@
using System;
using System.Collections;
using System.IO;
using System.Text;
using System.Text.RegularExpressions;
@@ -9,6 +10,9 @@ namespace SKIT.FlurlHttpClient.Wechat.OpenAI.Utilities
{
internal static class XmlUtility
{
// REF: https://docs.microsoft.com/zh-cn/dotnet/api/system.xml.serialization.xmlserializer#dynamically-generated-assemblies
private static Hashtable _serializers = new Hashtable();
public static string Serialize(Type type, object obj)
{
string xml;
@@ -20,10 +24,16 @@ namespace SKIT.FlurlHttpClient.Wechat.OpenAI.Utilities
settings.WriteEndDocumentOnClose = false;
settings.NamespaceHandling = NamespaceHandling.OmitDuplicates;
string skey = type.AssemblyQualifiedName;
XmlSerializer? xmlSerializer = (XmlSerializer)_serializers[skey];
if (xmlSerializer == null)
{
xmlSerializer = new XmlSerializer(type, new XmlRootAttribute("xml"));
_serializers[skey] = xmlSerializer;
}
using var stream = new MemoryStream();
using var writer = XmlWriter.Create(stream, settings);
XmlSerializer xmlSerializer = new XmlSerializer(type, new XmlRootAttribute("xml"));
XmlSerializerNamespaces xmlNamespace = new XmlSerializerNamespaces();
xmlNamespace.Add(string.Empty, string.Empty);
xmlSerializer.Serialize(writer, obj, xmlNamespace);