feat(微信): 消息推送支持明文 XML/JSON 验签与回包

- POST /apiwechat/verification 恢复消息回调，支持 JSON/XML 明文包体

- SHA1 验签通过后 GET 原样返回 echostr，POST 无回复时返回 success

- 补充官方验签示例与 JSON/XML 推送集成测试

Co-authored-by: Cursor <cursoragent@cursor.com>

src/SimpleAdmin.Api.IntegrationTests/WeChatMessagePushIntegrationTests.cs

@@ -0,0 +1,134 @@
+using System.Net;
+using System.Security.Cryptography;
+using System.Text;
+using FluentAssertions;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
+using Moq;
+using Oms.Domain.SystemAggregate.Consts;
+using Oms.Domain.SystemAggregate.Entities;
+using Oms.Domain.SystemAggregate.Repositories;
+using SimpleAdmin.Api.IntegrationTests.Support;
+using SimpleAdmin.Api.WeChat.Options;
+
+namespace SimpleAdmin.Api.IntegrationTests;
+
+public class WeChatMessagePushIntegrationTests
+{
+    [Fact]
+    public void WeChatSignature_ShouldMatchOfficialExample()
+    {
+        const string token = "AAAAA";
+        const string timestamp = "1714037059";
+        const string nonce = "486452656";
+        const string expected = "899cf89e464efb63f54ddac96b0a0a235f53aa78";
+
+        SignWeChat(token, timestamp, nonce).Should().Be(expected);
+    }
+
+    [Fact]
+    public async Task JsonPush_WithValidSignature_ShouldReturnSuccess()
+    {
+        const string token = "AAAAA";
+        const string timestamp = "1714037059";
+        const string nonce = "486452656";
+        const string signature = "899cf89e464efb63f54ddac96b0a0a235f53aa78";
+
+        await using var host = await SimpleAdminApiTestHost.CreateAsync(configureServices: services =>
+        {
+            ConfigureWeChatFallback(services, token);
+        });
+
+        const string json = """
+                            {
+                                "ToUserName": "gh_97417a04a28d",
+                                "FromUserName": "o9AgO5Kd5ggOC-bXrbNODIiE3bGY",
+                                "CreateTime": 1714037059,
+                                "MsgType": "event",
+                                "Event": "debug_demo",
+                                "debug_str": "hello world"
+                            }
+                            """;
+
+        using var content = new StringContent(json, Encoding.UTF8, "application/json");
+        var response = await host.Client.PostAsync(
+            $"/apiwechat/verification?signature={signature}&timestamp={timestamp}&nonce={nonce}",
+            content);
+
+        response.StatusCode.Should().Be(HttpStatusCode.OK);
+        (await response.Content.ReadAsStringAsync()).Should().Be("success");
+    }
+
+    [Fact]
+    public async Task JsonPush_WithInvalidSignature_ShouldReturnError()
+    {
+        await using var host = await SimpleAdminApiTestHost.CreateAsync(configureServices: services =>
+        {
+            ConfigureWeChatFallback(services, "AAAAA");
+        });
+
+        const string json = """{"MsgType":"event","Event":"debug_demo"}""";
+        using var content = new StringContent(json, Encoding.UTF8, "application/json");
+        var response = await host.Client.PostAsync(
+            "/apiwechat/verification?signature=invalid&timestamp=1714037059&nonce=486452656",
+            content);
+
+        response.StatusCode.Should().Be(HttpStatusCode.OK);
+        (await response.Content.ReadAsStringAsync()).Should().Be("error");
+    }
+
+    [Fact]
+    public async Task XmlPush_WithValidSignature_AndUnhandledEvent_ShouldReturnSuccess()
+    {
+        const string token = "test-token";
+        const string timestamp = "1400000000";
+        const string nonce = "nonce";
+        var signature = SignWeChat(token, timestamp, nonce);
+
+        await using var host = await SimpleAdminApiTestHost.CreateAsync(configureServices: services =>
+        {
+            ConfigureWeChatFallback(services, token);
+        });
+
+        const string xml = """
+                           <xml>
+                           <ToUserName><![CDATA[gh_test]]></ToUserName>
+                           <FromUserName><![CDATA[o-test]]></FromUserName>
+                           <CreateTime>1400000000</CreateTime>
+                           <MsgType><![CDATA[event]]></MsgType>
+                           <Event><![CDATA[CLICK]]></Event>
+                           </xml>
+                           """;
+
+        using var content = new StringContent(xml, Encoding.UTF8, "text/xml");
+        var response = await host.Client.PostAsync(
+            $"/wechat/mp/wx-test?signature={signature}&timestamp={timestamp}&nonce={nonce}",
+            content);
+
+        response.StatusCode.Should().Be(HttpStatusCode.OK);
+        (await response.Content.ReadAsStringAsync()).Should().Be("success");
+    }
+
+    private static void ConfigureWeChatFallback(IServiceCollection services, string token)
+    {
+        services.PostConfigure<WeChatMpOptions>(options =>
+        {
+            options.Token = token;
+            options.AppId = "wx-test";
+        });
+
+        var configRepository = new Mock<ISystemOtherConfigRepository>();
+        configRepository
+            .Setup(x => x.GetByConfigCodeAsync(SystemOtherConfigCodes.WeChatMp, It.IsAny<CancellationToken>()))
+            .ReturnsAsync((SystemOtherConfig?)null);
+        services.RemoveAll<ISystemOtherConfigRepository>();
+        services.AddSingleton(configRepository.Object);
+    }
+
+    private static string SignWeChat(string token, string timestamp, string nonce)
+    {
+        var parts = new[] { token, timestamp, nonce }.OrderBy(x => x, StringComparer.Ordinal).ToArray();
+        var hash = SHA1.HashData(Encoding.UTF8.GetBytes(string.Concat(parts)));
+        return Convert.ToHexString(hash).ToLowerInvariant();
+    }
+}

src/SimpleAdmin.Api.IntegrationTests/WeChatRouteIntegrationTests.cs

@@ -16,12 +16,12 @@ namespace SimpleAdmin.Api.IntegrationTests;
 public class WeChatRouteIntegrationTests
 {
     [Fact]
-    public async Task WeChatLegacyVerification_ShouldRegisterGetOnly()
+    public async Task WeChatLegacyVerification_ShouldRegisterGetAndPostMethods()
     {
         await using var host = await SimpleAdminApiTestHost.CreateAsync(configureServices: ConfigureWeChatFallback);
 
         var methods = host.GetHttpMethods("apiwechat/verification");
-        methods.Should().BeEquivalentTo(["GET"]);
+        methods.Should().BeEquivalentTo(["GET", "POST"]);
     }
 
     [Fact]

src/SimpleAdmin.Api/Auth/AuthService.WeChatMp.cs

@@ -84,12 +84,28 @@ public partial class AuthService
     }
 
     /// <summary>
-    /// 微信消息/事件回调。
+    /// 微信公众号消息/事件推送（明文，XML/JSON）。
+    /// </summary>
+    [AllowAnonymous]
+    [HttpPost("/apiwechat/verification")]
+    [Consumes("text/xml", "application/xml", "application/json", "text/plain")]
+    [Produces("text/plain", "application/xml")]
+    [ApiExplorerSettings(GroupName = "WeChat")]
+    public Task<ContentResult> WeChatMessageLegacyAsync(
+        [FromQuery] string signature,
+        [FromQuery] string timestamp,
+        [FromQuery] string nonce,
+        [FromQuery(Name = "encrypt_type")] string? encryptType,
+        CancellationToken cancellationToken = default) =>
+        WeChatMessageCoreAsync(signature, timestamp, nonce, encryptType, cancellationToken);
+
+    /// <summary>
+    /// 微信消息/事件推送（明文，XML/JSON）。
     /// </summary>
     [AllowAnonymous]
     [HttpPost("/wechat/mp/{appId}")]
-    [Consumes("text/xml", "application/xml", "text/plain")]
+    [Consumes("text/xml", "application/xml", "application/json", "text/plain")]
-    [Produces("application/xml")]
+    [Produces("text/plain", "application/xml")]
     [ApiExplorerSettings(GroupName = "WeChat")]
     public async Task<ContentResult> WeChatMessageAsync(
         [FromRoute] string appId,
@@ -101,8 +117,19 @@ public partial class AuthService
     {
         var options = await WeChatMpConfigProvider.GetAsync(cancellationToken);
         WeChatMpCallbackSupport.EnsureAppId(options, appId);
+        return await WeChatMessageCoreAsync(signature, timestamp, nonce, encryptType, cancellationToken);
+    }
+
+    private async Task<ContentResult> WeChatMessageCoreAsync(
+        string signature,
+        string timestamp,
+        string nonce,
+        string? encryptType,
+        CancellationToken cancellationToken)
+    {
         var request = httpContextAccessor.HttpContext?.Request
                       ?? throw new BusinessException("无法读取微信回调请求");
+        var options = await WeChatMpConfigProvider.GetAsync(cancellationToken);
         return await WeChatMpCallbackSupport.HandleMessageAsync(
             options,
             WeChatEventHandler,

src/SimpleAdmin.Api/WeChat/Services/WeChatMpApiClient.cs

@@ -359,6 +359,78 @@ internal static class WeChatXmlMessageParser
     }
 }
 
+internal static class WeChatJsonMessageParser
+{
+    public static WeChatIncomingMessage? Parse(string json)
+    {
+        if (string.IsNullOrWhiteSpace(json))
+        {
+            return null;
+        }
+
+        try
+        {
+            using var doc = JsonDocument.Parse(json);
+            var root = doc.RootElement;
+
+            string? GetString(string name)
+            {
+                if (!root.TryGetProperty(name, out var prop))
+                {
+                    return null;
+                }
+
+                return prop.ValueKind switch
+                {
+                    JsonValueKind.String => prop.GetString(),
+                    JsonValueKind.Number => prop.GetRawText(),
+                    JsonValueKind.True => "true",
+                    JsonValueKind.False => "false",
+                    _ => prop.ToString()
+                };
+            }
+
+            return new WeChatIncomingMessage
+            {
+                ToUserName = GetString("ToUserName"),
+                FromUserName = GetString("FromUserName"),
+                CreateTime = GetString("CreateTime"),
+                MsgType = GetString("MsgType"),
+                Event = GetString("Event"),
+                EventKey = GetString("EventKey"),
+                Content = GetString("Content")
+            };
+        }
+        catch (JsonException)
+        {
+            return null;
+        }
+    }
+}
+
+internal static class WeChatIncomingMessageParser
+{
+    public static WeChatIncomingMessage? Parse(string body, string? contentType)
+    {
+        if (string.IsNullOrWhiteSpace(body))
+        {
+            return null;
+        }
+
+        var trimmed = body.TrimStart();
+        if (IsJson(contentType, trimmed))
+        {
+            return WeChatJsonMessageParser.Parse(body);
+        }
+
+        return WeChatXmlMessageParser.Parse(body);
+    }
+
+    private static bool IsJson(string? contentType, ReadOnlySpan<char> body) =>
+        contentType?.Contains("json", StringComparison.OrdinalIgnoreCase) == true
+        || body.StartsWith("{");
+}
+
 public sealed class WeChatIncomingMessage
 {
     public string? ToUserName { get; init; }

src/SimpleAdmin.Api/WeChat/WeChatMpCallbackSupport.cs

@@ -54,6 +54,13 @@ internal static class WeChatMpCallbackSupport
         string? encryptType,
         CancellationToken cancellationToken)
     {
+        if (string.IsNullOrWhiteSpace(options.Token))
+        {
+            logger.LogWarning("微信消息回调未配置 Token");
+            return PlainText("error");
+        }
+
+        // token、timestamp、nonce 字典序排序后拼接，SHA1 与 signature 对比
         if (!WeChatSignatureHelper.Validate(options.Token, timestamp, nonce, signature))
         {
             logger.LogWarning("微信消息验签失败");
@@ -64,26 +71,28 @@ internal static class WeChatMpCallbackSupport
         var requestBody = await reader.ReadToEndAsync(cancellationToken);
         if (string.IsNullOrWhiteSpace(requestBody))
         {
-            return Xml(string.Empty);
+            return AckSuccess();
         }
 
+        // 明文模式：无 encrypt_type 或 encrypt_type=raw；安全模式 AES 暂不支持
         if (!string.IsNullOrWhiteSpace(encryptType)
             && !string.Equals(encryptType, "raw", StringComparison.OrdinalIgnoreCase))
         {
             logger.LogWarning(
                 "收到加密微信消息({EncryptType})，当前仅支持明文模式，请在公众平台切换为明文或后续启用 AES。",
                 encryptType);
-            return Xml(string.Empty);
+            return AckSuccess();
         }
 
-        var message = WeChatXmlMessageParser.Parse(requestBody);
+        var message = WeChatIncomingMessageParser.Parse(requestBody, request.ContentType);
         if (message == null)
         {
-            return Xml(string.Empty);
+            logger.LogWarning("无法解析微信消息体（支持明文 XML / JSON）");
+            return AckSuccess();
         }
 
         var reply = await eventHandler.HandleAsync(message, cancellationToken);
-        return Xml(reply ?? string.Empty);
+        return BuildMessageReply(reply);
     }
 
     public static void EnsureAppId(WeChatMpOptions options, string appId)
@@ -103,6 +112,18 @@ internal static class WeChatMpCallbackSupport
     private static ContentResult EchoStr(string echostr) =>
         new() { Content = echostr, ContentType = "text/plain", StatusCode = StatusCodes.Status200OK };
 
+    private static ContentResult AckSuccess() => PlainText("success");
+
+    private static ContentResult BuildMessageReply(string? reply)
+    {
+        if (string.IsNullOrEmpty(reply))
+        {
+            return AckSuccess();
+        }
+
+        return reply.TrimStart().StartsWith('<') ? Xml(reply) : PlainText(reply);
+    }
+
     private static ContentResult PlainText(string content) =>
         new() { Content = content, ContentType = "text/plain; charset=utf-8", StatusCode = StatusCodes.Status200OK };