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118 lines
3.6 KiB
118 lines
3.6 KiB
using System;
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using System.Reflection;
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using System.Threading;
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namespace Apewer.Web
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{
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/// <summary>API 上下文。</summary>
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public sealed class ApiContext
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{
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#region 构造参数
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private ApiInvoker _invoker = null;
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private ApiProvider _provider = null;
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private ApiEntries _entries = null;
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private DateTime _beginning = DateTime.Now;
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private ApiOptions _options = null;
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/// <summary>此上下文启动的时间。</summary>
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public DateTime Beginning { get => _beginning; }
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/// <summary>API 调用器。</summary>
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public ApiInvoker Invoker { get => _invoker; }
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/// <summary>API 提供程序。</summary>
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public ApiProvider Provider { get => _provider; }
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/// <summary>API 入口集。</summary>
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public ApiEntries Entries { get => _entries; }
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/// <summary>API 选项。</summary>
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public ApiOptions Options { get => _options; }
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#endregion
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#region 执行过程中产生的内容
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/// <summary>API 行为。</summary>
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public ApiAction ApiAction { get; internal set; }
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/// <summary>API 请求。</summary>
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public ApiRequest Request { get; internal set; }
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/// <summary>API 响应。</summary>
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public ApiResponse Response { get; internal set; }
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/// <summary>API 控制器实例。</summary>
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public ApiController Controller { get; internal set; }
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/// <summary>执行的方法。</summary>
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public MethodInfo MethodInfo { get; internal set; }
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#endregion
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#region 中间件
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Action<ApiContext> _middleware_callback = null;
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/// <summary>设置中间件回调。</summary>
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internal void SetMiddlewareCallback(Action<ApiContext> callback) => _middleware_callback = callback;
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/// <summary>继续执行。</summary>
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public void Next() => _middleware_callback?.Invoke(this);
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#endregion
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#region Current
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#if NET461_OR_GREATER || NETSTANDARD || NETCOREAPP
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static AsyncLocal<ApiContext> _current = new AsyncLocal<ApiContext>();
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#endif
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static void SetCurrent(ApiContext context)
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{
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#if NET461_OR_GREATER || NETSTANDARD || NETCOREAPP
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_current.Value = context;
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#else
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System.Runtime.Remoting.Messaging.CallContext.LogicalSetData("ApiContext", context);
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#endif
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}
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static ApiContext GetCurrent()
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{
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#if NET461_OR_GREATER || NETSTANDARD || NETCOREAPP
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if (_current == null) return null;
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return _current.Value;
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#else
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return System.Runtime.Remoting.Messaging.CallContext.LogicalGetData("ApiContext") as ApiContext;
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#endif
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}
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/// <summary>获取当前的 <see cref="ApiContext" /> 实例。</summary>
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public static ApiContext Current { get => GetCurrent(); }
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#endregion
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internal ApiContext(ApiInvoker invoker, ApiProvider provider, ApiEntries entries)
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{
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if (invoker == null) throw new ArgumentNullException(nameof(invoker));
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if (provider == null) throw new ArgumentNullException(nameof(provider));
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if (entries == null) throw new ArgumentNullException(nameof(entries));
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_invoker = invoker;
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_provider = provider;
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_entries = entries;
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_options = invoker.Options ?? new ApiOptions();
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SetCurrent(this);
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}
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/// <summary>自定义数据。若此自定义数据实现了 <see cref="IDisposable" />，将会与 Context 一起自动释放。</summary>
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public object Data { get; set; }
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}
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}
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