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- 将aspnet基础镜像地址替换为192.168.100.120私有仓库地址 - 将dotnet sdk镜像地址同样替换为私有仓库地址 docs(gateway): 补充YARP网关插件系统规划文档 - 增加整体架构图及说明，明确各项目职责 - 详细描述Web UI管理界面技术选型及功能模块 - 规范文档结构，提升可读性和完整性
713 lines
19 KiB
Markdown
713 lines
19 KiB
Markdown
# 网关插件系统技术方案
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## 一、概述
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本文档描述 YARP 网关的插件系统规划，包括 Web UI 管理界面和动态编译加载两大核心功能。
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---
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## 二、整体架构
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```
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┌─────────────────────┐
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│ fengling-console │ (运维后端 - Backend)
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│ web 前端 │
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└─────────┬───────────┘
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│ HTTP API
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▼
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┌─────────────────────┐
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│ fengling-console │ (运维服务端)
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│ │
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│ - 路由管理 API │ ───▶ 数据库持久化
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│ - 集群管理 API │ ───▶ Redis Pub/Sub (发布事件)
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│ - 插件管理 API │
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└─────────┬───────────┘
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▲
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│ 事件订阅
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│
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┌─────────┴───────────┐
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│ fengling-gateway │ (YARP 网关多实例)
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│ - YARP 代理 │
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│ - 插件执行 │
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│ - 事件监听 │
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└─────────────────────┘
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```
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### 项目职责
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| 项目 | 职责 |
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|------|------|
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| **fengling-gateway** | 纯 YARP 代理 + 事件订阅 + 插件执行 |
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| **fengling-console** | 运维 API + 配置持久化 + 事件发布 |
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| **fengling-console-web** | 前端 UI (Monaco Editor) |
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---
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## 三、Web UI 管理界面
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### 3.1 技术选型
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| 项目 | 选择 | 理由 |
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|------|------|------|
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| 前端框架 | React/Vue | 独立前端项目 |
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| 编辑器 | Monaco Editor | VS Code 同款，体验一致 |
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| 路由 | `/gateway` | 运维平台内统一路由 |
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### 3.2 功能模块
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```
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/gateway
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├── 路由管理 (Routes)
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│ ├── 列表/搜索
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│ ├── 创建/编辑/删除
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│ └── 路由规则配置
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├── 集群管理 (Clusters)
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│ ├── 上下游服务列表
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│ ├── 实例管理
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│ └── 健康状态
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├── 插件管理 (Plugins)
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│ ├── 已加载插件列表
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│ ├── 上传 DLL
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│ └── 在线编写 C# 代码
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└── 监控统计
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├── QPS/延迟
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└── 流量图表
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```
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## 一、概述
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本文档描述 YARP 网关的插件系统规划，包括 Web UI 管理界面和动态编译加载两大核心功能。
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---
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## 二、Web UI 管理界面
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### 2.1 技术选型
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| 项目 | 选择 | 理由 |
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|------|------|------|
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| 框架 | Razor Pages | 嵌入主应用，单项目部署 |
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| 路由 | `/gateway/ui` | 参考 SwaggerUI 风格 |
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| 编辑器 | Monaco Editor | VS Code 同款，体验一致 |
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### 2.2 功能模块
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```
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/gateway/ui
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├── 路由管理 (Routes)
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│ ├── 列表/搜索
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│ ├── 创建/编辑/删除
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│ └── 路由规则配置
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├── 集群管理 (Clusters)
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│ ├── 上下游服务列表
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│ ├── 实例管理
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│ └── 健康状态
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├── 插件管理 (Plugins)
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│ ├── 已加载插件列表
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│ ├── 上传 DLL
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│ └── 在线编写 C# 代码
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└── 监控统计
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├── QPS/延迟
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└── 流量图表
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```
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---
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## 三、插件系统架构
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### 3.1 插件类型定义
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```csharp
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namespace Fengling.Gateway.Plugin.Abstractions
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{
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/// <summary>
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/// 插件基础接口
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/// </summary>
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public interface IGatewayPlugin
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{
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string Name { get; }
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string Version { get; }
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string? Description { get; }
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Task OnLoadAsync();
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Task OnUnloadAsync();
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}
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/// <summary>
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/// 请求处理插件
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/// </summary>
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public interface IRequestPlugin : IGatewayPlugin
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{
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/// <summary>请求到达网关前</summary>
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Task<HttpContext?> OnRequestAsync(HttpContext context);
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/// <summary>路由决策后</summary>
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Task<HttpContext?> OnRouteMatchedAsync(HttpContext context, RouteConfig route);
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/// <summary>转发到后端前</summary>
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Task<HttpContext?> OnForwardingAsync(HttpContext context, HttpRequestMessage request);
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}
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/// <summary>
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/// 响应处理插件
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/// </summary>
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public interface IResponsePlugin : IGatewayPlugin
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{
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/// <summary>后端响应后</summary>
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Task OnBackendResponseAsync(HttpContext context, HttpResponseMessage response);
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/// <summary>返回客户端前</summary>
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Task OnResponseFinalizingAsync(HttpContext context);
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}
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/// <summary>
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/// 路由转换插件
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/// </summary>
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public interface IRouteTransformPlugin : IGatewayPlugin
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{
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Task<RouteConfig> TransformRouteAsync(RouteConfig original, HttpContext context);
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}
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/// <summary>
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/// 负载均衡插件
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/// </summary>
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public interface ILoadBalancePlugin : IGatewayPlugin
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{
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Task<Destination> SelectDestinationAsync(
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IReadOnlyList<Destination> destinations,
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HttpContext context);
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}
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}
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```
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### 3.2 插件阶段枚举
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```csharp
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public enum PipelineStage
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{
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None = 0,
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OnRequest = 1, // 请求到达网关前
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OnRoute = 2, // 路由决策时
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OnRequestBackend = 3, // 转发到后端前
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OnResponseBackend = 4, // 后端响应后
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OnResponse = 5 // 返回给客户端前
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}
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```
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---
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## 四、核心模块设计
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### 4.1 依赖管理（A方案）
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#### 简单场景：直接使用网关已有程序集
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```csharp
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// API 暴露网关程序集
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[ApiController]
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public class AssembliesController : ControllerBase
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{
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[HttpGet("available")]
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public List<AssemblyInfo> GetAvailableAssemblies()
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{
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return AppDomain.CurrentDomain.GetAssemblies()
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.Where(a => !a.IsDynamic && !string.IsNullOrEmpty(a.Location))
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.Select(a => new AssemblyInfo
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{
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Name = a.GetName().Name,
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Version = a.GetName().Version?.ToString(),
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Location = a.Location
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})
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.OrderBy(a => a.Name)
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.ToList();
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}
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}
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```
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#### 复杂场景：上传 ZIP 包
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```csharp
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public class PluginUploadService
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{
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private readonly IObjectStorage _storage;
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private readonly PluginDbContext _db;
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private readonly string _localPluginPath = "/app/plugins";
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public async Task<PluginPackage> UploadPluginAsync(IFormFile zipFile, string pluginName)
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{
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// 1. 上传到对象存储
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var storageKey = $"plugins/{Guid.NewGuid()}/{zipFile.FileName}";
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await _storage.UploadAsync(zipFile.OpenReadStream(), storageKey);
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// 2. 保存到数据库
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var plugin = new PluginPackage
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{
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Id = Guid.NewGuid(),
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Name = pluginName,
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StorageKey = storageKey,
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UploadedAt = DateTime.UtcNow,
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Status = PluginStatus.Pending
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};
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await _db.PluginPackages.AddAsync(plugin);
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await _db.SaveChangesAsync();
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return plugin;
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}
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public async Task ExtractAndLoadAsync(Guid pluginId)
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{
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var plugin = await _db.PluginPackages.FindAsync(pluginId);
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// 3. 下载到本地
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var localDir = Path.Combine(_localPluginPath, plugin.Id.ToString());
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Directory.CreateDirectory(localDir);
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await _storage.DownloadAsync(plugin.StorageKey, localDir + ".zip");
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// 4. 解压
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ZipFile.ExtractToDirectory(localDir + ".zip", localDir, overwriteFiles: true);
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File.Delete(localDir + ".zip");
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// 5. 加载插件
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await _pluginManager.LoadFromDirectoryAsync(localDir);
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}
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}
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```
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#### ZIP 上传验证
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```csharp
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public class PluginValidationService
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{
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public async Task<PluginValidationResult> ValidateAsync(Stream zipStream)
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{
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var tempDir = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
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await ExtractZipAsync(zipStream, tempDir);
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try
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{
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var dlls = Directory.GetFiles(tempDir, "*.dll");
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var result = new PluginValidationResult();
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foreach (var dll in dlls)
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{
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var dllResult = await ValidateDllAsync(dll);
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result.Assemblies.Add(dllResult);
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}
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var validPlugins = result.Assemblies
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.Where(a => a.IsValidPlugin)
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.ToList();
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if (validPlugins.Count == 0)
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{
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result.IsValid = false;
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result.ErrorMessage = "未找到实现 IGatewayPlugin 接口的类";
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}
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else
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{
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result.IsValid = true;
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result.ValidPluginTypes = validPlugins
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.SelectMany(a => a.PluginTypes)
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.ToList();
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}
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return result;
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}
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finally
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{
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Directory.Delete(tempDir, true);
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}
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}
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private async Task<DllValidationResult> ValidateDllAsync(string dllPath)
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{
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var result = new DllValidationResult { DllName = Path.GetFileName(dllPath) };
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try
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{
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var assembly = AssemblyLoadContext.Default.LoadFromAssemblyPath(dllPath);
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var pluginTypes = assembly.GetTypes()
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.Where(t => typeof(IGatewayPlugin).IsAssignableFrom(t))
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.Where(t => !t.IsAbstract && !t.IsInterface)
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.ToList();
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if (pluginTypes.Count > 0)
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{
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result.IsValidPlugin = true;
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result.PluginTypes = pluginTypes.Select(t => new PluginTypeInfo
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{
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TypeName = t.FullName,
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ImplementedInterfaces = t.GetInterfaces().Select(i => i.Name).ToList()
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}).ToList();
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}
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}
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catch (Exception ex)
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{
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result.IsValid = false;
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result.ErrorMessage = ex.Message;
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}
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return result;
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}
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}
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```
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---
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### 4.2 插件间通信（B方案）
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采用**方案 3：强类型 + 弱类型混合**
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#### 插件上下文
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```csharp
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public class GatewayContext
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{
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// 预定义常用字段（强类型）
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public string? UserId { get; set; }
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public string? TenantId { get; set; }
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public UserTier Tier { get; set; }
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public bool IsAuthenticated { get; set; }
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public DateTime RequestTime { get; set; }
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// 扩展数据（弱类型）
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public PluginDataBag Data { get; } = new();
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}
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public class PluginDataBag
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{
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private readonly Dictionary<string, object> _data = new();
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public T? Get<T>(string key) => _data.TryGetValue(key, out var v) ? (T)v : default;
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public void Set<T>(string key, T value) => _data[key] = value!;
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}
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```
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#### 使用示例
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```csharp
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// 插件 A: 认证
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public class AuthPlugin : IRequestPlugin
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{
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public async Task<HttpContext?> OnRequestAsync(HttpContext context)
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{
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var userId = ValidateToken(context);
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if (userId != null)
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{
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context.Items["CurrentUserId"] = userId;
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context.Items["IsAuthenticated"] = true;
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}
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return context;
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}
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}
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// 插件 B: 审计
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public class AuditPlugin : IRequestPlugin
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{
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public async Task<HttpContext?> OnRequestAsync(HttpContext context)
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{
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if (context.Items.TryGetValue("CurrentUserId", out var userId))
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{
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await _logger.LogAsync($"User {userId} accessed {context.Request.Path}");
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}
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return context;
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}
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}
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```
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---
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### 4.3 在线代码编辑器（C方案）
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采用 **Monaco Editor + 前端模拟补全**
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> **补充说明**：如需更完整的 C# IntelliSense（如真实代码分析、跳转到定义），可使用 Microsoft 官方的 **roslyn-language-server**（VS Code C# 扩展背后使用的语言服务器）。
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>
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> **部署方式**：
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> ```bash
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> # 安装
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> dotnet tool install -g Microsoft.CodeAnalysis.LanguageServer
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>
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> # 启动服务
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> roslyn-languageserver --port 5000
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> ```
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>
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> 前端通过 WebSocket 连接该服务获取完整的语言特性支持。但目前阶段前端模拟补全已足够使用。
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```html
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<script src="https://cdn.jsdelivr.net/npm/monaco-editor@0.45.0/min/vs/loader.js"></script>
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<div id="editor" style="height: 500px;"></div>
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<script>
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require.config({ paths: { 'vs': 'https://cdn.jsdelivr.net/npm/monaco-editor@0.45.0/min/vs' }});
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require(['vs/editor/editor.main'], function() {
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monaco.editor.create(document.getElementById('editor'), {
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value: getEditorTemplate(),
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language: 'csharp',
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theme: 'vs-dark',
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automaticLayout: true,
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minimap: { enabled: false },
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fontSize: 14,
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lineNumbers: 'on',
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scrollBeyondLastLine: false
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});
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// 注册 C# 补全
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monaco.languages.registerCompletionItemProvider('csharp', {
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provideCompletionItems: (model, position) => {
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const suggestions = [
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// 常用类型
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{ label: 'HttpContext', kind: monaco.languages.CompletionItemKind.Class },
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{ label: 'HttpRequest', kind: monaco.languages.CompletionItemKind.Class },
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{ label: 'HttpResponse', kind: monaco.languages.CompletionItemKind.Class },
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// 插件接口方法
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{ label: 'OnRequestAsync', kind: monaco.languages.CompletionItemKind.Method },
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{ label: 'OnResponseAsync', kind: monaco.languages.CompletionItemKind.Method },
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{ label: 'TransformRouteAsync', kind: monaco.languages.CompletionItemKind.Method },
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// 常用属性
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{ label: 'ctx.Request', kind: monaco.languages.CompletionItemKind.Property },
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{ label: 'ctx.Response', kind: monaco.languages.CompletionItemKind.Property },
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{ label: 'ctx.Items', kind: monaco.languages.CompletionItemKind.Property },
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];
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return { suggestions };
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}
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});
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});
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</script>
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```
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#### 编辑器模板
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```csharp
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// 生成的代码模板
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$@"
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using System;
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using System.Threading.Tasks;
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using Microsoft.AspNetCore.Http;
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using Fengling.Gateway.Plugin.Abstractions;
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public class {pluginName} : IRequestPlugin
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{{
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public string Name => ""{pluginName}"";
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public string Version => ""1.0.0"";
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public async Task<HttpContext?> OnRequestAsync(HttpContext ctx)
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{{
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// 编写你的逻辑
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{userCode}
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}}
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}}
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";
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```
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---
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### 4.4 插件生命周期管理
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```csharp
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public class PluginManager
|
||
{
|
||
private readonly Dictionary<string, PluginInstance> _plugins = new();
|
||
private readonly RoslynPluginCompiler _compiler = new();
|
||
|
||
public async Task<PluginInstance> LoadPluginAsync(byte[] assemblyBytes, string pluginName)
|
||
{
|
||
// 1. 隔离加载程序集
|
||
var context = new PluginLoadContext(pluginName);
|
||
var assembly = context.LoadFromStream(new MemoryStream(assemblyBytes));
|
||
|
||
// 2. 查找插件入口类型
|
||
var pluginType = assembly.GetTypes()
|
||
.FirstOrDefault(t => typeof(IGatewayPlugin).IsAssignableFrom(t));
|
||
|
||
if (pluginType == null)
|
||
{
|
||
context.Unload();
|
||
throw new InvalidOperationException("No IGatewayPlugin implementation found");
|
||
}
|
||
|
||
// 3. 创建实例
|
||
var plugin = (IGatewayPlugin)Activator.CreateInstance(pluginType)!;
|
||
await plugin.OnLoadAsync();
|
||
|
||
// 4. 保存实例
|
||
var instance = new PluginInstance
|
||
{
|
||
Name = pluginName,
|
||
Assembly = assembly,
|
||
Context = context,
|
||
Plugin = plugin,
|
||
LoadedAt = DateTime.UtcNow
|
||
};
|
||
|
||
_plugins[pluginName] = instance;
|
||
return instance;
|
||
}
|
||
|
||
public async Task UnloadPluginAsync(string pluginName)
|
||
{
|
||
if (!_plugins.TryGetValue(pluginName, out var instance))
|
||
return;
|
||
|
||
await instance.Plugin.OnUnloadAsync();
|
||
instance.Context.Unload();
|
||
_plugins.Remove(pluginName);
|
||
}
|
||
}
|
||
|
||
public class PluginLoadContext : AssemblyLoadContext
|
||
{
|
||
public PluginLoadContext(string name) : base(name, isCollectible: true) { }
|
||
|
||
protected override Assembly? Load(AssemblyName assemblyName)
|
||
{
|
||
return null;
|
||
}
|
||
}
|
||
```
|
||
|
||
---
|
||
|
||
### 4.5 插件编译服务
|
||
|
||
```csharp
|
||
public class RoslynPluginCompiler
|
||
{
|
||
private readonly IEnumerable<MetadataReference> _defaultReferences;
|
||
|
||
public RoslynPluginCompiler()
|
||
{
|
||
_defaultReferences = GetDefaultReferences();
|
||
}
|
||
|
||
public CompileResult Compile(string sourceCode, string pluginName, IEnumerable<string> extraAssemblies)
|
||
{
|
||
var syntaxTree = CSharpSyntaxTree.ParseText(sourceCode);
|
||
|
||
var references = _defaultReferences.Concat(
|
||
extraAssemblies.Select(a => MetadataReference.CreateFromFile(a))
|
||
);
|
||
|
||
var compilation = CSharpCompilation.Create(
|
||
assemblyName: $"Plugin_{pluginName}_{Guid.NewGuid():N}",
|
||
syntaxTrees: new[] { syntaxTree },
|
||
references: references,
|
||
options: new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary)
|
||
.WithAllowUnsafe(false)
|
||
.WithOptimizationLevel(OptimizationLevel.Release));
|
||
|
||
using var ms = new MemoryStream();
|
||
var emitResult = compilation.Emit(ms);
|
||
|
||
if (!emitResult.Success)
|
||
{
|
||
return CompileResult.Fail(emitResult.Diagnostics);
|
||
}
|
||
|
||
ms.Seek(0, SeekOrigin.Begin);
|
||
return CompileResult.Success(ms.ToArray());
|
||
}
|
||
|
||
private IEnumerable<MetadataReference> GetDefaultReferences()
|
||
{
|
||
return AppDomain.CurrentDomain.GetAssemblies()
|
||
.Where(a => !a.IsDynamic && !string.IsNullOrEmpty(a.Location))
|
||
.Select(a => MetadataReference.CreateFromFile(a.Location));
|
||
}
|
||
}
|
||
```
|
||
|
||
---
|
||
|
||
## 五、数据库模型
|
||
|
||
```csharp
|
||
public class PluginPackage
|
||
{
|
||
public Guid Id { get; set; }
|
||
public string Name { get; set; } = string.Empty;
|
||
public string Version { get; set; } = "1.0.0";
|
||
public string? Description { get; set; }
|
||
public string StorageKey { get; set; } = string.Empty;
|
||
public PluginStatus Status { get; set; }
|
||
public DateTime UploadedAt { get; set; }
|
||
public DateTime? LoadedAt { get; set; }
|
||
}
|
||
|
||
public class PluginPipeline
|
||
{
|
||
public Guid Id { get; set; }
|
||
public Guid PluginId { get; set; }
|
||
public PipelineStage Stage { get; set; }
|
||
public int Order { get; set; }
|
||
public bool IsEnabled { get; set; }
|
||
}
|
||
|
||
public enum PluginStatus
|
||
{
|
||
Pending = 0,
|
||
Validated = 1,
|
||
Loaded = 2,
|
||
Failed = 3,
|
||
Disabled = 4
|
||
}
|
||
```
|
||
|
||
---
|
||
|
||
## 六、实施计划
|
||
|
||
| 阶段 | 任务 | 优先级 |
|
||
|------|------|--------|
|
||
| Phase 1 | 集成 YARP 到现有项目 | 高 |
|
||
| Phase 2 | 插件基础接口定义 | 高 |
|
||
| Phase 3 | 插件编译 + 加载框架 | 高 |
|
||
| Phase 4 | 嵌入式 Razor UI | 中 |
|
||
| Phase 5 | Monaco Editor 集成 | 中 |
|
||
| Phase 6 | ZIP 上传验证功能 | 中 |
|
||
| Phase 7 | 测试与优化 | 低 |
|
||
|
||
---
|
||
|
||
## 七、NuGet 依赖
|
||
|
||
```xml
|
||
<!-- 核心编译 -->
|
||
<PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.13.0" />
|
||
|
||
<!-- Scripting API (可选) -->
|
||
<PackageReference Include="Microsoft.CodeAnalysis.CSharp.Scripting" Version="4.13.0" />
|
||
|
||
<!-- 依赖解析 -->
|
||
<PackageReference Include="System.Runtime.Loader" Version="4.3.0" />
|
||
```
|
||
|
||
---
|
||
|
||
## 八、总结
|
||
|
||
本方案实现了：
|
||
|
||
1. **Web UI 管理**：类 SwaggerUI 风格的可视化界面
|
||
2. **动态编译**：Roslyn 在线编译 C# 代码
|
||
3. **插件加载**：独立 AssemblyLoadContext，支持热卸载
|
||
4. **灵活扩展**：支持简单场景（使用已有程序集）和复杂场景（上传 ZIP）
|
||
5. **流程控制**：插件可分配到 5 个不同阶段执行
|
||
|
||
---
|
||
|
||
*文档版本: 1.0*
|
||
*最后更新: 2026-03-01*
|