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FileDownloader
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cal 2025-08-05 22:23:28 +08:00
commit 029cae75a6
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9
Appsettings.cs Executable file
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namespace ETFileServer
{
public class Appsettings
{
public string DirectoryPath;
public int Port;
}
}

80
Controllers/DownLoadController.cs Executable file
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using System.IO;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Filters;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.FileProviders;
using Microsoft.Extensions.Logging;
namespace ETFileServer
{
[Route("")]
[ApiController]
public class DownLoadController : Controller
{
private readonly IFileProvider _fileProvider;
private readonly ILogger<DownLoadController> _logger;
private readonly IConfiguration _configuration;
public DownLoadController(ILogger<DownLoadController> logger, IFileProvider fileProvider, IConfiguration configuration)
{
_logger = logger;
_fileProvider = fileProvider;
_configuration = configuration;
}
[HttpGet("{*filePath}")]
public IActionResult Get(string filePath)
{
if (string.IsNullOrEmpty(filePath))
{
return BadRequest("A file path must be provided.");
}
var fileInfo = _fileProvider.GetFileInfo(filePath);
if (!fileInfo.Exists || fileInfo.IsDirectory)
{
_logger.LogWarning($"File not found or is a directory: {filePath}");
return NotFound();
}
// 检查文件大小是否超出限制
long maxFileSizeInBytes = _configuration.GetValue<long>("MaxFileSizeMb", 100) * 1024 * 1024;
if (fileInfo.Length > maxFileSizeInBytes)
{
_logger.LogWarning($"File '{filePath}' exceeds the size limit of {maxFileSizeInBytes} bytes.");
return new StatusCodeResult(413); // 413 Payload Too Large
}
_logger.LogInformation($"Serving file: {fileInfo.PhysicalPath}");
return PhysicalFile(fileInfo.PhysicalPath, "application/octet-stream", fileInfo.Name);
}
public override void OnActionExecuting(ActionExecutingContext context)
{
var httpContext = context.HttpContext;
if (httpContext.Request.Method != "GET")
{
context.Result = new StatusCodeResult(405);
return;
}
if (httpContext.WebSockets.IsWebSocketRequest)
{
context.Result = new BadRequestResult();
return;
}
if (httpContext.Request.HasFormContentType)
{
context.Result = new BadRequestResult();
return;
}
}
public override void OnActionExecuted(ActionExecutedContext context)
{
}
}
}

35
FileServer.csproj Executable file
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<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>net9.0</TargetFramework>
<LangVersion>latest</LangVersion>
</PropertyGroup>
<PropertyGroup>
<AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
<OutputPath>../../FileServer/</OutputPath>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
<OutputPath>../../FileServer/</OutputPath>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.AspNetCore.App" />
<PackageReference Include="Microsoft.AspNetCore.Razor.Design" Version="2.2.0" PrivateAssets="All" />
<PackageReference Include="Microsoft.AspNetCore.StaticFiles" Version="2.2.0" />
<PackageReference Include="Microsoft.Extensions.Configuration" Version="2.2.0" />
</ItemGroup>
<ItemGroup>
<_ContentIncludedByDefault Remove="Properties\launchSettings.json" />
</ItemGroup>
<ItemGroup>
<Content Update="appsettings.json">
<CopyToPublishDirectory>PreserveNewest</CopyToPublishDirectory>
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</Content>
</ItemGroup>
</Project>

7
FileServer.csproj.user Executable file
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<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<PropertyGroup>
<ActiveDebugProfile>IIS Express</ActiveDebugProfile>
<NameOfLastUsedPublishProfile>FolderProfile</NameOfLastUsedPublishProfile>
</PropertyGroup>
</Project>

24
FileServer.sln Normal file
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Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio Version 17
VisualStudioVersion = 17.5.2.0
MinimumVisualStudioVersion = 10.0.40219.1
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FileServer", "FileServer.csproj", "{79759A8D-256A-D7F8-1522-9077B7D22E98}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
Release|Any CPU = Release|Any CPU
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{79759A8D-256A-D7F8-1522-9077B7D22E98}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{79759A8D-256A-D7F8-1522-9077B7D22E98}.Debug|Any CPU.Build.0 = Debug|Any CPU
{79759A8D-256A-D7F8-1522-9077B7D22E98}.Release|Any CPU.ActiveCfg = Release|Any CPU
{79759A8D-256A-D7F8-1522-9077B7D22E98}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
EndGlobalSection
GlobalSection(ExtensibilityGlobals) = postSolution
SolutionGuid = {0C6B39F7-F6FC-4CD4-8051-EBB8EC73D9AB}
EndGlobalSection
EndGlobal

29
Program.cs Executable file
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using System.IO;
using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
namespace ETFileServer
{
public class Program
{
public static void Main(string[] args)
{
CreateWebHostBuilder(args).Build().Run();
}
public static IWebHostBuilder CreateWebHostBuilder(string[] args)
{
IConfigurationRoot config = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.json", true)
.Build();
return WebHost.CreateDefaultBuilder(args)
.UseConfiguration(config)
.UseUrls(config["urls"])
.UseStartup<Startup>();
}
}
}

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Startup.cs Executable file
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using System;
using System.IO;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.FileProviders;
using Microsoft.Extensions.Hosting;
namespace ETFileServer
{
public class Startup
{
private IConfiguration Configuration { get; }
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
// 1. 从配置中获取文件根目录路径
string fileRootPath = Configuration["DirectoryPath"];
if (string.IsNullOrEmpty(fileRootPath))
{
throw new InvalidOperationException("DirectoryPath is not configured in appsettings.json.");
}
// 2. 解析为绝对路径
string fullPath = Path.GetFullPath(fileRootPath);
if (!Directory.Exists(fullPath))
{
// 在启动时检查目录是否存在，如果不存在则创建
Directory.CreateDirectory(fullPath);
Console.WriteLine($"Warning: Root directory not found. Created directory at: {fullPath}");
}
// 3. 创建并注册一个 PhysicalFileProvider 作为单例服务
// 这样整个应用都可以安全地使用它来访问文件
var provider = new PhysicalFileProvider(fullPath);
services.AddSingleton<IFileProvider>(provider);
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
// 对于任何未匹配到Controller的请求，直接返回404 Not Found
app.Run(context =>
{
context.Response.StatusCode = 404;
return Task.CompletedTask;
});
}
}
}

5
appsettings.json Executable file
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{
"urls": "http://*:2083",
"DirectoryPath": "PublicFiles/",
"MaxFileSizeMb": 100
}