c# - 获取数据时 ServiceStack MsgPackServiceClient 失败，但 JsonServiceClient 有效

我正在玩 ServiceStack 并尝试了解这项技术。

我有一个非常简单的设置(完整的解决方案是 available for download ):

使用 ServiceStack(自托管)的独立 AppHost

我启动服务器

然后我查询 Article 数据列表。

我为 ServiceStack.Pluging.MsgPack 安装了 nuget 包并添加了引用并正确设置了 AppHost 插件，如下面的 main() 代码所示。

类 DTO 和服务

这些是我使用的数据类、DTO 和服务类:

public class Article : IReturn<Article>
{
    public string AR_REF { get; set; }
    public string AR_DESIGN { get; set; }
    public string AR_CODEBARRE { get; set; }
    public string FA_CODEFAMILLE { get; set; }
    public string CT_INTITULE { get; set; }
}

public class Articles : IReturn<List<Article>> { }

public class ArticleService : Service
{
    public List<Article> Get(Articles request) {
        return new List<Article>() {
            new Article() {AR_CODEBARRE = "987654", AR_REF = "1002.ARRGHHH", AR_DESIGN = "BLAH BLAH TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "50FAM"} ,
            new Article() {AR_CODEBARRE = "123456", AR_REF = "515.VEROTEST", AR_DESIGN = "THIS IS A TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "10FAM"} ,
            new Article() {AR_CODEBARRE = "987654", AR_REF = "1002.ARRGHHH", AR_DESIGN = "BLAH BLAH TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "50FAM"} ,
            new Article() {AR_CODEBARRE = "123456", AR_REF = "515.VEROTEST", AR_DESIGN = "THIS IS A TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "10FAM"} ,
            new Article() {AR_CODEBARRE = "987654", AR_REF = "1002.ARRGHHH", AR_DESIGN = "BLAH BLAH TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "50FAM"} ,
            new Article() {AR_CODEBARRE = "123456", AR_REF = "515.VEROTEST", AR_DESIGN = "THIS IS A TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "10FAM"} ,
            new Article() {AR_CODEBARRE = "987654", AR_REF = "1002.ARRGHHH", AR_DESIGN = "BLAH BLAH TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "50FAM"} ,
            new Article() {AR_CODEBARRE = "123456", AR_REF = "515.VEROTEST", AR_DESIGN = "THIS IS A TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "10FAM"} ,
            new Article() {AR_CODEBARRE = "987654", AR_REF = "1002.ARRGHHH", AR_DESIGN = "BLAH BLAH TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "50FAM"} ,
            new Article() {AR_CODEBARRE = "123456", AR_REF = "515.VEROTEST", AR_DESIGN = "THIS IS A TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "10FAM"} ,
            new Article() {AR_CODEBARRE = "987654", AR_REF = "1002.ARRGHHH", AR_DESIGN = "BLAH BLAH TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "50FAM"} ,
            new Article() {AR_CODEBARRE = "123456", AR_REF = "515.VEROTEST", AR_DESIGN = "THIS IS A TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "10FAM"} ,
            new Article() {AR_CODEBARRE = "987654", AR_REF = "1002.ARRGHHH", AR_DESIGN = "BLAH BLAH TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "50FAM"} ,
            new Article() {AR_CODEBARRE = "123456", AR_REF = "515.VEROTEST", AR_DESIGN = "THIS IS A TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "10FAM"} ,
            new Article() {AR_CODEBARRE = "987654", AR_REF = "1002.ARRGHHH", AR_DESIGN = "BLAH BLAH TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "50FAM"} ,
            new Article() {AR_CODEBARRE = "123456", AR_REF = "515.VEROTEST", AR_DESIGN = "THIS IS A TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "10FAM"} ,
        };
    }
}

所有这些都是允许客户端获取 16 个虚拟 Articles 的列表。

服务器和客户端请求

static void Main() {
    var appHost = new AppHost();
    appHost.Plugins.Add(new MsgPackFormat());
    appHost.Init();
    appHost.Start("http://localhost:8883");

    // Fails when calling client.Get()
    var client = new MsgPackServiceClient("http://localhost:8883");
    List<Article> response = client.Get(new Articles());

    appHost.Stop();
}

AppHost 定义为:

public class AppHost : AppHostHttpListenerBase
{
    static readonly ConfigurationResourceManager AppSettings = new ConfigurationResourceManager();
    public AppHost() : base("Test", typeof(Article).Assembly) { }
    public override void Configure(Funq.Container container) {  }
}

怎么了
client.Get(...) 调用失败，SerializationException 说:
解包器还没有读取任何数据。解包器可能永远不会读取或底层流为空。

当我使用超过 15 条记录的 MsgPackServiceClient() 时会发生异常。
奇怪的是，如果我返回 15 个或更少的 Articles 实例，它就可以工作。

如果我改用 JsvServiceClient() 或 JsonServiceClient()，则返回数千条记录没有问题。

我真的不知道我是否做错了什么，或者这里是否有其他东西在起作用。

附加信息和下载

我将 VS2012 与通过 nuget 安装的 ServiceStack 3.9.43(包括 MsgPack 插件)一起使用。
无论编译选项如何 (AnyCPU/x86)，都会出现问题。未启用代码优化(每个解决方案/项目选项都是默认选项)。

您可以 download the complete solution 并自己尝试。

最佳答案

所以，我不确定是什么问题。它似乎特定于在 AppHost 的同一应用程序中使用 MsgPackServiceClient。如果您从浏览器向 http://localhost:8883/Articles?format=x-msgpack 之类的内容发出请求，它似乎可以工作。

编写一个测试(如底部的一个)似乎确认 MessagePackSerializer 工作正常。

添加写入 OutputStream 的响应过滤器(如下)似乎可以解决您的问题。我尝试了列表中的 16 和 32 条记录。

希望这可以帮助。

    appHost.ResponseFilters.Add((httpReq, httpRes, dto) =>
    {
        if (httpReq.ResponseContentType == ContentType.MsgPack)
        {
            using (var ms = new MemoryStream())
            {
                var serializer = MessagePackSerializer.Create(dto.GetType());
                serializer.PackTo(Packer.Create(ms), dto);

                var bytes = ms.ToArray();

                var listenerResponse = (HttpListenerResponse)httpRes.OriginalResponse;
                listenerResponse.OutputStream.Write(bytes, 0, bytes.Length);
                httpRes.EndServiceStackRequest();
            }
        }
    });

MessagePackSerializer 测试

    [Test]
    public void test()
    {
        var arts = new List<Article>() {
            new Article() {AR_CODEBARRE = "987654", AR_REF = "1002.ARRGHHH", AR_DESIGN = "BLAH BLAH TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "50FAM"} ,
            new Article() {AR_CODEBARRE = "123456", AR_REF = "515.VEROTEST", AR_DESIGN = "THIS IS A TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "10FAM"} ,
            new Article() {AR_CODEBARRE = "987654", AR_REF = "1002.ARRGHHH", AR_DESIGN = "BLAH BLAH TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "50FAM"} ,
            new Article() {AR_CODEBARRE = "123456", AR_REF = "515.VEROTEST", AR_DESIGN = "THIS IS A TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "10FAM"} ,
            new Article() {AR_CODEBARRE = "987654", AR_REF = "1002.ARRGHHH", AR_DESIGN = "BLAH BLAH TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "50FAM"} ,
            new Article() {AR_CODEBARRE = "123456", AR_REF = "515.VEROTEST", AR_DESIGN = "THIS IS A TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "10FAM"} ,
            new Article() {AR_CODEBARRE = "987654", AR_REF = "1002.ARRGHHH", AR_DESIGN = "BLAH BLAH TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "50FAM"} ,
            new Article() {AR_CODEBARRE = "123456", AR_REF = "515.VEROTEST", AR_DESIGN = "THIS IS A TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "10FAM"} ,
            new Article() {AR_CODEBARRE = "987654", AR_REF = "1002.ARRGHHH", AR_DESIGN = "BLAH BLAH TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "50FAM"} ,
            new Article() {AR_CODEBARRE = "123456", AR_REF = "515.VEROTEST", AR_DESIGN = "THIS IS A TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "10FAM"} ,
            new Article() {AR_CODEBARRE = "987654", AR_REF = "1002.ARRGHHH", AR_DESIGN = "BLAH BLAH TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "50FAM"} ,
            new Article() {AR_CODEBARRE = "123456", AR_REF = "515.VEROTEST", AR_DESIGN = "THIS IS A TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "10FAM"} ,
            new Article() {AR_CODEBARRE = "987654", AR_REF = "1002.ARRGHHH", AR_DESIGN = "BLAH BLAH TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "50FAM"} ,
            new Article() {AR_CODEBARRE = "123456", AR_REF = "515.VEROTEST", AR_DESIGN = "THIS IS A TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "10FAM"} ,
            new Article() {AR_CODEBARRE = "987654", AR_REF = "1002.ARRGHHH", AR_DESIGN = "BLAH BLAH TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "50FAM"} ,
            new Article() {AR_CODEBARRE = "123456", AR_REF = "515.VEROTEST", AR_DESIGN = "THIS IS A TEST", CT_INTITULE = "ACME", FA_CODEFAMILLE = "10FAM"} ,
        };

        var serializer = MessagePackSerializer.Create<List<Article>>();

        var ms = new MemoryStream();
        serializer.PackTo(Packer.Create(ms), arts);
        ms.Position = 0;
        try
        {
            var obj = serializer.Unpack(ms);
            Assert.IsNotNull(obj);
        }
        catch (Exception ex)
        {
            throw ex;
        }

        ms.Close();
    }

关于c# - 获取数据时 ServiceStack MsgPackServiceClient 失败，但 JsonServiceClient 有效，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/16238889/

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c# - 获取数据时 ServiceStack MsgPackServiceClient 失败，但 JsonServiceClient 有效