92 lines
3.4 KiB
C#
92 lines
3.4 KiB
C#
// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
|
|
|
|
using System;
|
|
using System.Threading.Tasks;
|
|
using Microsoft.AspNet.Abstractions;
|
|
using Microsoft.Owin.FileSystems;
|
|
|
|
namespace Microsoft.AspNet.StaticFiles
|
|
{
|
|
/// <summary>
|
|
/// Enables serving static files for a given request path
|
|
/// </summary>
|
|
public class StaticFileMiddleware
|
|
{
|
|
private readonly StaticFileOptions _options;
|
|
private readonly PathString _matchUrl;
|
|
private readonly RequestDelegate _next;
|
|
|
|
/// <summary>
|
|
/// Creates a new instance of the StaticFileMiddleware.
|
|
/// </summary>
|
|
/// <param name="next">The next middleware in the pipeline.</param>
|
|
/// <param name="options">The configuration options.</param>
|
|
public StaticFileMiddleware(RequestDelegate next, StaticFileOptions options)
|
|
{
|
|
if (next == null)
|
|
{
|
|
throw new ArgumentNullException("next");
|
|
}
|
|
if (options == null)
|
|
{
|
|
throw new ArgumentNullException("options");
|
|
}
|
|
if (options.ContentTypeProvider == null)
|
|
{
|
|
throw new ArgumentException(Resources.Args_NoContentTypeProvider);
|
|
}
|
|
if (options.FileSystem == null)
|
|
{
|
|
options.FileSystem = new PhysicalFileSystem("." + options.RequestPath.Value);
|
|
}
|
|
|
|
_next = next;
|
|
_options = options;
|
|
_matchUrl = options.RequestPath;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Processes a request to determine if it matches a known file, and if so, serves it.
|
|
/// </summary>
|
|
/// <param name="context"></param>
|
|
/// <returns></returns>
|
|
public Task Invoke(HttpContext context)
|
|
{
|
|
var fileContext = new StaticFileContext(context, _options, _matchUrl);
|
|
if (fileContext.ValidateMethod()
|
|
&& fileContext.ValidatePath()
|
|
&& fileContext.LookupContentType()
|
|
&& fileContext.LookupFileInfo())
|
|
{
|
|
fileContext.ComprehendRequestHeaders();
|
|
|
|
switch (fileContext.GetPreconditionState())
|
|
{
|
|
case StaticFileContext.PreconditionState.Unspecified:
|
|
case StaticFileContext.PreconditionState.ShouldProcess:
|
|
if (fileContext.IsHeadMethod)
|
|
{
|
|
return fileContext.SendStatusAsync(Constants.Status200Ok);
|
|
}
|
|
if (fileContext.IsRangeRequest)
|
|
{
|
|
return fileContext.SendRangeAsync();
|
|
}
|
|
return fileContext.SendAsync();
|
|
|
|
case StaticFileContext.PreconditionState.NotModified:
|
|
return fileContext.SendStatusAsync(Constants.Status304NotModified);
|
|
|
|
case StaticFileContext.PreconditionState.PreconditionFailed:
|
|
return fileContext.SendStatusAsync(Constants.Status412PreconditionFailed);
|
|
|
|
default:
|
|
throw new NotImplementedException(fileContext.GetPreconditionState().ToString());
|
|
}
|
|
}
|
|
|
|
return _next(context);
|
|
}
|
|
}
|
|
}
|