ASP。NET/IIS6:如何搜索服务器的mime映射?

i want to find the mime-type for a given file extension on an IIS ASP.NET web-server from the code-behind file.

我想在IIS ASP上找到给定文件扩展名的mime类型。NET web服务器来自代码隐藏文件。

i want to search the same list that the server itself uses when serving up a file. This means that any mime types a web-server administrator has added to the Mime Map will be included.

我希望搜索服务器在提供文件时使用的列表。这意味着将包括web服务器管理员添加到mime映射的任何mime类型。

i could blindly use

我可以盲目使用

HKEY_CLASSES_ROOT\MIME\Database\Content Type

but that isn't documented as being the same list IIS uses, nor is it documented where the Mime Map is stored.

但这并没有记录为IIS使用的列表，也没有记录到Mime映射存储的位置。

i could blindly call FindMimeFromData, but that isn't documented as being the same list IIS uses, nor can i guarantee that the IIS Mime Map will also be returned from that call.

我可以盲目地调用FindMimeFromData，但这并没有记录为IIS使用的相同列表，我也不能保证IIS Mime映射也会从该调用中返回。

3 个解决方案

#1

Here's one I made earlier:

这是我之前做的一个:

public static string GetMimeTypeFromExtension(string extension)
{
    using (DirectoryEntry mimeMap = 
           new DirectoryEntry("IIS://Localhost/MimeMap"))
    {
        PropertyValueCollection propValues = mimeMap.Properties["MimeMap"];

        foreach (object value in propValues)
        {
            IISOle.IISMimeType mimeType = (IISOle.IISMimeType)value;

            if (extension == mimeType.Extension)
            {
                return mimeType.MimeType;
            }
        }

        return null;

    }
}

Add a reference to System.DirectoryServices and a reference to Active DS IIS Namespace Provider under the COM tab. The extension needs to have the leading dot, i.e. .flv.

向系统添加引用。DirectoryServices和COM选项卡下的活动DS IIS命名空间提供程序的引用。扩展需要有前导点，即。flv。

#2

Here is another similar implementation, but doesn't require adding the COM reference - it retrieves the properties through reflection instead and stores them in a NameValueCollection for easy lookup:

这里是另一个类似的实现，但不需要添加COM引用——它通过反射来检索属性，并将它们存储在一个NameValueCollection中，以便查找:

using System.Collections.Specialized; //NameValueCollection
using System.DirectoryServices; //DirectoryEntry, PropertyValueCollection
using System.Reflection; //BindingFlags

NameValueCollection map = new NameValueCollection();
using (DirectoryEntry entry = new DirectoryEntry("IIS://localhost/MimeMap"))
{
  PropertyValueCollection properties = entry.Properties["MimeMap"];
  Type t = properties[0].GetType();

  foreach (object property in properties)
  {
    BindingFlags f = BindingFlags.GetProperty;
    string ext = t.InvokeMember("Extension", f, null, property, null) as String;
    string mime = t.InvokeMember("MimeType", f, null, property, null) as String;
    map.Add(ext, mime);
  }
}

You can very easily cache that lookup table, and then reference it later:

您可以很容易地缓存查找表，然后在以后引用它:

Response.ContentType = map[ext] ?? "binary/octet-stream";

#3

IIS stores the MIME information in its own database. Searching for "MimeMap IIS" on the internet will reveal how to read it or even change it. See for example C# - How to display MimeMap entries to the console from an instance of IIS.

IIS将MIME信息存储在自己的数据库中。在互联网上搜索“MimeMap IIS”将揭示如何阅读它，甚至是修改它。请参见示例c# -如何将MimeMap条目从IIS实例显示到控制台。

#1