add aesbody for get aes cryptbody

2025-11-02 18:58:01 +08:00
parent 9a8d14142a
commit c7373da691
5 changed files with 297 additions and 0 deletions
@@ -0,0 +1,106 @@
+using System;
+using System.IO;
+using System.Linq;
+using System.Text.Json;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc.ModelBinding;
+using SimApi.Communications;
+using SimApi.Helpers;
+
+namespace SimApi.ModelBinders;
+
+public class AesBodyModelBinder : IModelBinder
+{
+    public async Task BindModelAsync(ModelBindingContext bindingContext)
+    {
+        var request = bindingContext.HttpContext.Request;
+        request.EnableBuffering();
+        using var reader = new StreamReader(request.Body, leaveOpen: true);
+        var requestBody = await reader.ReadToEndAsync();
+        request.Body.Position = 0;
+
+        if (string.IsNullOrEmpty(requestBody))
+        {
+            bindingContext.ModelState.AddModelError("", "请求体不能为空");
+            bindingContext.Result = ModelBindingResult.Failed();
+            return;
+        }
+
+        SimApiOneFieldRequest<string>? aesRequest;
+        try
+        {
+            aesRequest = JsonSerializer.Deserialize<SimApiOneFieldRequest<string>>(requestBody, SimApiUtil.JsonOption);
+        }
+        catch (JsonException ex)
+        {
+            bindingContext.ModelState.AddModelError("", $"请求体格式错误：{ex.Message}");
+            bindingContext.Result = ModelBindingResult.Failed();
+            return;
+        }
+
+        if (aesRequest == null || string.IsNullOrEmpty(aesRequest.Data))
+        {
+            bindingContext.ModelState.AddModelError("", "请求体缺少密文Data字段");
+            bindingContext.Result = ModelBindingResult.Failed();
+            return;
+        }
+
+        // 3. 根据配置获取appId（参考上一节代码）
+        var keyProvider =
+            bindingContext.HttpContext.RequestServices.GetService(Type.GetType(bindingContext.BinderModelName!)!) as
+                AesBodyProviderBase;
+        string? appId = null;
+        if (!string.IsNullOrEmpty(keyProvider!.AppIdName))
+        {
+            appId = bindingContext.HttpContext.Request.Query[keyProvider.AppIdName]
+                .FirstOrDefault() ?? bindingContext.HttpContext.Request.Headers[keyProvider.AppIdName]
+                .FirstOrDefault();
+
+            if (string.IsNullOrEmpty(appId))
+            {
+                bindingContext.ModelState.AddModelError("",
+                    $"未找到{keyProvider.AppIdName}");
+                bindingContext.Result = ModelBindingResult.Failed();
+                return;
+            }
+        }
+
+        // 4. 通过接口获取密钥（解耦的核心：不再直接依赖数据库）
+        var key = keyProvider.GetKey(appId);
+        if (string.IsNullOrEmpty(key))
+        {
+            bindingContext.ModelState.AddModelError("", "获取密钥失败（应用不存在或密钥未配置）");
+            bindingContext.Result = ModelBindingResult.Failed();
+            return;
+        }
+
+        // 5. 解密和反序列化（保持原有逻辑）
+        try
+        {
+            var jsonStr = SimApiAesUtil.Decrypt(aesRequest.Data, key);
+            if (string.IsNullOrEmpty(jsonStr))
+            {
+                bindingContext.ModelState.AddModelError("", "解密失败");
+                bindingContext.Result = ModelBindingResult.Failed();
+                return;
+            }
+
+            var targetType = bindingContext.ModelType;
+            var deserializedModel = JsonSerializer.Deserialize(jsonStr, targetType, SimApiUtil.JsonOption);
+            if (deserializedModel == null)
+            {
+                bindingContext.ModelState.AddModelError("", "反序列化失败");
+                bindingContext.Result = ModelBindingResult.Failed();
+                return;
+            }
+
+            bindingContext.Result = ModelBindingResult.Success(deserializedModel);
+        }
+        catch (Exception ex)
+        {
+            bindingContext.ModelState.AddModelError("", $"处理异常：{ex.Message}");
+            bindingContext.Result = ModelBindingResult.Failed();
+        }
+    }
+}