jellyfin/Emby.Server.Implementations/Serialization/JsonSerializer.cs

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using System;
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using System.IO;
using System.Threading.Tasks;
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using MediaBrowser.Model.IO;
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using MediaBrowser.Model.Serialization;
using Microsoft.Extensions.Logging;
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namespace Emby.Common.Implementations.Serialization
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{
/// <summary>
/// Provides a wrapper around third party json serialization.
/// </summary>
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public class JsonSerializer : IJsonSerializer
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{
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private readonly IFileSystem _fileSystem;
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public JsonSerializer(
IFileSystem fileSystem)
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{
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_fileSystem = fileSystem;
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Configure();
}
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/// <summary>
/// Serializes to stream.
/// </summary>
/// <param name="obj">The obj.</param>
/// <param name="stream">The stream.</param>
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/// <exception cref="ArgumentNullException">obj</exception>
public void SerializeToStream(object obj, Stream stream)
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{
if (obj == null)
{
throw new ArgumentNullException(nameof(obj));
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}
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
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}
ServiceStack.Text.JsonSerializer.SerializeToStream(obj, obj.GetType(), stream);
}
/// <summary>
/// Serializes to file.
/// </summary>
/// <param name="obj">The obj.</param>
/// <param name="file">The file.</param>
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/// <exception cref="ArgumentNullException">obj</exception>
public void SerializeToFile(object obj, string file)
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{
if (obj == null)
{
throw new ArgumentNullException(nameof(obj));
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}
if (string.IsNullOrEmpty(file))
{
throw new ArgumentNullException(nameof(file));
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}
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using (var stream = _fileSystem.GetFileStream(file, FileOpenMode.Create, FileAccessMode.Write, FileShareMode.Read))
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{
SerializeToStream(obj, stream);
}
}
private static Stream OpenFile(string path)
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{
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return new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read, 131072);
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}
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/// <summary>
/// Deserializes from file.
/// </summary>
/// <param name="type">The type.</param>
/// <param name="file">The file.</param>
/// <returns>System.Object.</returns>
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/// <exception cref="ArgumentNullException">type</exception>
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public object DeserializeFromFile(Type type, string file)
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{
if (type == null)
{
throw new ArgumentNullException(nameof(type));
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}
if (string.IsNullOrEmpty(file))
{
throw new ArgumentNullException(nameof(file));
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}
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using (var stream = OpenFile(file))
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{
return DeserializeFromStream(stream, type);
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}
}
/// <summary>
/// Deserializes from file.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="file">The file.</param>
/// <returns>``0.</returns>
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/// <exception cref="ArgumentNullException">file</exception>
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public T DeserializeFromFile<T>(string file)
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where T : class
{
if (string.IsNullOrEmpty(file))
{
throw new ArgumentNullException(nameof(file));
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}
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using (var stream = OpenFile(file))
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{
return DeserializeFromStream<T>(stream);
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}
}
/// <summary>
/// Deserializes from stream.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="stream">The stream.</param>
/// <returns>``0.</returns>
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/// <exception cref="ArgumentNullException">stream</exception>
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public T DeserializeFromStream<T>(Stream stream)
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{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
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}
return ServiceStack.Text.JsonSerializer.DeserializeFromStream<T>(stream);
}
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public Task<T> DeserializeFromStreamAsync<T>(Stream stream)
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{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
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}
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return ServiceStack.Text.JsonSerializer.DeserializeFromStreamAsync<T>(stream);
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}
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/// <summary>
/// Deserializes from string.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="text">The text.</param>
/// <returns>``0.</returns>
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/// <exception cref="ArgumentNullException">text</exception>
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public T DeserializeFromString<T>(string text)
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{
if (string.IsNullOrEmpty(text))
{
throw new ArgumentNullException(nameof(text));
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}
return ServiceStack.Text.JsonSerializer.DeserializeFromString<T>(text);
}
/// <summary>
/// Deserializes from stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="type">The type.</param>
/// <returns>System.Object.</returns>
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/// <exception cref="ArgumentNullException">stream</exception>
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public object DeserializeFromStream(Stream stream, Type type)
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{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
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}
if (type == null)
{
throw new ArgumentNullException(nameof(type));
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}
return ServiceStack.Text.JsonSerializer.DeserializeFromStream(type, stream);
}
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public async Task<object> DeserializeFromStreamAsync(Stream stream, Type type)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
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}
if (type == null)
{
throw new ArgumentNullException(nameof(type));
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}
using (var reader = new StreamReader(stream))
{
var json = await reader.ReadToEndAsync().ConfigureAwait(false);
return ServiceStack.Text.JsonSerializer.DeserializeFromString(json, type);
}
}
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/// <summary>
/// Configures this instance.
/// </summary>
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private void Configure()
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{
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ServiceStack.Text.JsConfig.DateHandler = ServiceStack.Text.DateHandler.ISO8601;
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ServiceStack.Text.JsConfig.ExcludeTypeInfo = true;
ServiceStack.Text.JsConfig.IncludeNullValues = false;
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ServiceStack.Text.JsConfig.AlwaysUseUtc = true;
ServiceStack.Text.JsConfig.AssumeUtc = true;
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ServiceStack.Text.JsConfig<Guid>.SerializeFn = SerializeGuid;
}
private static string SerializeGuid(Guid guid)
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{
if (guid.Equals(Guid.Empty))
{
return null;
}
return guid.ToString("N");
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}
/// <summary>
/// Deserializes from string.
/// </summary>
/// <param name="json">The json.</param>
/// <param name="type">The type.</param>
/// <returns>System.Object.</returns>
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/// <exception cref="ArgumentNullException">json</exception>
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public object DeserializeFromString(string json, Type type)
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{
if (string.IsNullOrEmpty(json))
{
throw new ArgumentNullException(nameof(json));
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}
if (type == null)
{
throw new ArgumentNullException(nameof(type));
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}
return ServiceStack.Text.JsonSerializer.DeserializeFromString(json, type);
}
/// <summary>
/// Serializes to string.
/// </summary>
/// <param name="obj">The obj.</param>
/// <returns>System.String.</returns>
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/// <exception cref="ArgumentNullException">obj</exception>
public string SerializeToString(object obj)
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{
if (obj == null)
{
throw new ArgumentNullException(nameof(obj));
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}
return ServiceStack.Text.JsonSerializer.SerializeToString(obj, obj.GetType());
}
}
}