ServiceStack：在處理程序中設置響應類型？

Question

在獨立模式下使用ServiceStack時，我在Apphost中爲任意文件名（它只是將數據文件從數據目錄中提取出來）中定義了一個catch-all處理程序。

其核心的方法是（fi爲FileInfo成員變量，和ExtensionContentType是從擴展到MIME類型一個Dictionary）：

public class StaticFileHandler : EndpointHandlerBase 
{ 
    protected static readonly Dictionary<string, string> ExtensionContentType; 

    protected FileInfo fi; 

    static StaticFileHandler() 
    { 
     ExtensionContentType = new Dictionary<string, string>(StringComparer.InvariantCultureIgnoreCase) 
     { 
      { ".text", "text/plain" }, 
      { ".js", "text/javascript" }, 
      { ".css", "text/css" }, 
      { ".html", "text/html" }, 
      { ".htm", "text/html" }, 
      { ".png", "image/png" }, 
      { ".ico", "image/x-icon" }, 
      { ".gif", "image/gif" }, 
      { ".bmp", "image/bmp" }, 
      { ".jpg", "image/jpeg" } 
     }; 
    } 

    public string BaseDirectory { protected set; get; } 
    public string Prefix { protected set; get; } 

    public StaticFileHandler(string baseDirectory, string prefix) 
    { 
     BaseDirectory = baseDirectory; 
     Prefix = prefix; 
    } 

    private StaticFileHandler(FileInfo fi) 
    { 
     this.fi = fi; 
    } 

    public static StaticFileHandler Factory(string baseDirectory, string prefix, string pathInfo) 
    { 
     if (!pathInfo.StartsWith(prefix, StringComparison.InvariantCultureIgnoreCase)) 
     { 
      return null; 
     } 

     var fn = baseDirectory + "/" + pathInfo.After(prefix.Length); 

     Console.Write("StaticFileHandler.Factory fn=" + fn); 

     Console.WriteLine("AbsoluteUri={0}", pathInfo); 

     var fi = new System.IO.FileInfo(fn); 

     if (!fi.Exists) 
     { 
      return null; 
     } 

     return new StaticFileHandler(fi); 
    } 

    public override void ProcessRequest(IHttpRequest httpReq, IHttpResponse httpRes, string operationName) 
    { 
     using (var source = new System.IO.FileStream(fi.FullName, System.IO.FileMode.Open)) 
     { 
      source.CopyTo(httpRes.OutputStream); 
      //var bytes = source.ReadAllBytes(); 
      //httpRes.OutputStream.Write(bytes, 0, bytes.Length); 
     } 

     // timeStamp = fi.LastWriteTime;       

     httpRes.AddHeader("Date", DateTime.Now.ToString("R")); 
     httpRes.AddHeader("Content-Type", ExtensionContentType.Safeget(fi.Extension) ?? "text/plain"); 
     //httpRes.ContentType = ExtensionContentType.Safeget(fi.Extension, "text/plain"); 
    } 

    public override object CreateRequest(IHttpRequest request, string operationName) 
    { 
     return null; 
    } 

    public override object GetResponse(IHttpRequest httpReq, IHttpResponse httpRes, object request) 
    { 
     return null; 
    } 
} 

實際HTTP響應-Type頭沒有被置位時，我使用標記爲方法1或方法2的行進行運行。使用IE9開發人員工具進行調試顯示，根本沒有設置響應類型。

從catch-all處理程序設置內容類型（和流內容）的正確方法是什麼？

這不是一個標準的服務，所以我不能只返回一個自定義的IHttpResponse這似乎是正常的服務方法。

附加信息：Date頭沒有被設置要麼...

Answer 1

我認爲這個問題是這一行，如果你這樣做

public override void ProcessRequest(IHttpRequest httpReq, IHttpResponse httpRes, string operationName) 
{ 
    var bytes = File.ReadAllBytes(fi.FullName);     
    httpRes.AddHeader("Date", DateTime.Now.ToString("R")); 
    httpRes.AddHeader("Content-Type", "text/plain"); 
    httpRes.AddHeader("TestHeader", "SomeValue"); 
    httpRes.OutputStream.Write(bytes, 0, bytes.Length); 
} 

source.CopyTo(httpRes.OutputStream);

標題應填入

簡單的控制檯應用程序測試答案

Initialize ServiceStack Ap pHost和控制檯內運行：

class Program 
{ 
    static void Main(string[] args) 
    { 
     var appHost = new AppHost(); 
     appHost.Init(); 
     appHost.Start("http://*:1337/"); 
     System.Console.WriteLine("Listening on http://localhost:1337/ ..."); 
     System.Console.ReadLine(); 
     System.Threading.Thread.Sleep(System.Threading.Timeout.Infinite); 
    } 
} 

一些虛擬服務...不是真的有必要對這樣的回答：

[Route("/Hello/{Name}")] 
public class Hello 
{ 
    public string Name { get; set; } 
} 

public class HelloService : Service 
{ 
    public string Any(Hello request) 
    { 
     return request.Name; 
    } 
} 

配置APPHOST和「測試代碼」添加到CatchAllHanders：

public class AppHost : AppHostHttpListenerBase 
{ 
    public AppHost() : base("Test Console", typeof(AppHost).Assembly) { } 

    public override void Configure(Funq.Container container) 
    { 
     CatchAllHandlers.Add(StaticFileHandler.Factory); 
    } 

} 

修改 '測試代碼' - 主要是需要去的ProcessRequest（），並返回一個文件：

public class StaticFileHandler : EndpointHandlerBase 
{ 
    protected static readonly Dictionary<string, string> ExtensionContentType; 

    protected FileInfo fi; 

    static StaticFileHandler() 
    { 
     ExtensionContentType = new Dictionary<string, string>(StringComparer.InvariantCultureIgnoreCase) 
    { 
     { ".text", "text/plain" }, 
     { ".js", "text/javascript" }, 
     { ".css", "text/css" }, 
     { ".html", "text/html" }, 
     { ".htm", "text/html" }, 
     { ".png", "image/png" }, 
     { ".ico", "image/x-icon" }, 
     { ".gif", "image/gif" }, 
     { ".bmp", "image/bmp" }, 
     { ".jpg", "image/jpeg" } 
    }; 
    } 

    public string BaseDirectory { protected set; get; } 
    public string Prefix { protected set; get; } 

    public StaticFileHandler(string baseDirectory, string prefix) 
    { 
     BaseDirectory = baseDirectory; 
     Prefix = prefix; 
    } 

    private StaticFileHandler(FileInfo fi) 
    { 
     this.fi = fi; 
    } 

    public static StaticFileHandler Factory(string baseDirectory, string prefix, string pathInfo) 
    { 
     return new StaticFileHandler(new FileInfo(@"C:\Test.xml")); 
    } 

    public override void ProcessRequest(IHttpRequest httpReq, IHttpResponse httpRes, string operationName) 
    { 
     var bytes = File.ReadAllBytes(fi.FullName); 

     httpRes.AddHeader("Date", DateTime.Now.ToString("R")); 
     httpRes.AddHeader("Content-Type", "text/plain"); 
     httpRes.AddHeader("Test", "SetThis"); 

     httpRes.OutputStream.Write(bytes, 0, bytes.Length); 
    } 

    public override object CreateRequest(IHttpRequest request, string operationName) 
    { 
     return null; 
    } 

    public override object GetResponse(IHttpRequest httpReq, IHttpResponse httpRes, object request) 
    { 
     return null; 
    } 
}