WPF开发-WEB服务器

前言

现在我想实现客户端项目内需要集成WEB服务器，用来提供文件的展示功能，有两种方法

• 集成第三方WEB服务器如Nginx
• C#实现

目前我的项目已经从集成Nginx更换为了C#实现，因为需求还是比较简单的，不需要Nginx那么多功能。

集成Nginx

下载Nginx放在项目根目录：如nginx/

属性=>生成事件=>生成前事件命令行中添加

taskkill /f /t /im nginx.exe
xcopy /Y /i /e $(ProjectDir)\nginx $(TargetDir)\nginx

项目中启动

/// <summary>
/// 启动Nginx.
/// </summary>
private static void StartNginx()
{
    try
    {
        StopNginx();
        string basePath = AppDomain.CurrentDomain.BaseDirectory;
        string nginxPath = System.IO.Path.Combine(basePath, "nginx");
        string nginxTempPath = System.IO.Path.Combine(nginxPath, "temp");
        DirectoryInfo di = new DirectoryInfo(nginxTempPath);
        if (!di.Exists)
        {
            di.Create();
        }
        Process mps = new Process();
        ProcessStartInfo mpsi = new ProcessStartInfo("nginx.exe")
        {
            WorkingDirectory = nginxPath,
            UseShellExecute = true,
            RedirectStandardInput = false,
            RedirectStandardOutput = false,
            CreateNoWindow = true,
            WindowStyle = ProcessWindowStyle.Hidden
        };
        mps.StartInfo = mpsi;
        mps.Start();
    }
    catch (Exception ex)
    {
        LogHelper.WriteErrLog("【启动Nginx】(StartNginx)无法启动Nginx，" + ex.Message, ex);
    }
}

/// <summary>
/// 关闭Nginx.
/// </summary>
private static void StopNginx()
{
    try
    {
        Process[] processes = Process.GetProcessesByName("nginx");
        foreach (Process p in processes)
        {
            string basePath = AppDomain.CurrentDomain.BaseDirectory;
            string nginxPath = System.IO.Path.Combine(basePath, "nginx", "nginx.exe");
            try
            {
                if (nginxPath == p.MainModule.FileName)
                {
                    p.Kill();
                    p.Close();
                }
            }
            catch (Exception ex)
            {
                LogHelper.WriteErrLog("【停止Nginx】(StartNginx)无法停止Nginx，" + ex.Message, ex);
            }
        }
    }
    catch (Exception ex)
    {
        LogHelper.WriteErrLog("【停止Nginx】(StartNginx)无法和获取到系统进程，" + ex.Message, ex);
    }
}

端口号和服务目录都在Nginx的配置文件中配置

C#实现

工具类(ZServerHelper)

using System;
using System.Net;

namespace SchoolClient.Utils.HttpServer
{
    public class ZServerHelper
    {
        private HttpListener httpListener = new HttpListener();
        private string basePath = "";

        public void Setup(string basePath, int port = 8080)
        {
            this.basePath = basePath;
            httpListener.AuthenticationSchemes = AuthenticationSchemes.Anonymous;
            httpListener.Prefixes.Add(string.Format("http://*:{0}/", port));
            httpListener.Start();//开启服务

            Receive();//异步接收请求
        }

        private void Receive()
        {
            httpListener.BeginGetContext(new AsyncCallback(EndReceive), null);
        }

        private void EndReceive(IAsyncResult ar)
        {
            HttpListenerContext context = httpListener.EndGetContext(ar);
            ZDispather(context);//解析请求
            Receive();
        }

        private ZRequestHelper RequestHelper;
        private ZResponseHelper ResponseHelper;

        private void ZDispather(HttpListenerContext context)
        {
            HttpListenerRequest request = context.Request;
            HttpListenerResponse response = context.Response;
            RequestHelper = new ZRequestHelper(request, basePath);
            ResponseHelper = new ZResponseHelper(response);
            RequestHelper.DispatchResources(fs =>
            {
                ResponseHelper.WriteToClient(fs);// 对相应的请求做出回应
            });
        }
    }
}

请求(ZRequestHelper)

using System;
using System.IO;
using System.Net;

namespace SchoolClient.Utils.HttpServer
{
    public class ZRequestHelper
    {
        private HttpListenerRequest request;
        private string basepath = "";

        public ZRequestHelper(HttpListenerRequest request, string basepath)
        {
            this.request = request;
            this.basepath = basepath;
        }

        public delegate void ExecutingDispatch(FileStream fs);

        public void DispatchResources(ExecutingDispatch action)
        {
            string rawUrl = request.RawUrl;
            string rawPath = rawUrl.Replace("/", Path.DirectorySeparatorChar + "");
            //这里对应请求其他类型资源，如图片，文本等
            string filePath = string.Format(@"{0}{1}", basepath, rawPath);
            //默认文档为index.html
            if (rawUrl.Length == 1)
            {
                filePath = string.Format(@"{0}/index.html", basepath);
            }

            filePath = filePath.Replace(Path.DirectorySeparatorChar + "" + Path.DirectorySeparatorChar, Path.DirectorySeparatorChar + "");

            try
            {
                if (File.Exists(filePath))
                {
                    FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read);

                    action?.Invoke(fs);
                }
            }
            catch { return; }
        }
    }
}

响应(ZResponseHelper)

using System;
using System.IO;
using System.Net;

namespace SchoolClient.Utils.HttpServer
{
    public class ZResponseHelper
    {
        private HttpListenerResponse response;

        public ZResponseHelper(HttpListenerResponse response)
        {
            this.response = response;
            outputStream = response.OutputStream;
        }

        public Stream outputStream { get; set; }

        public class FileObject
        {
            public FileStream fs;
            public byte[] buffer;
        }

        public void WriteToClient(FileStream fs)
        {
            response.StatusCode = 200;
            byte[] buffer = new byte[1024];
            FileObject obj = new FileObject() { fs = fs, buffer = buffer };
            fs.BeginRead(buffer, 0, buffer.Length, new AsyncCallback(EndWrite), obj);
        }

        private void EndWrite(IAsyncResult ar)
        {
            FileObject obj = ar.AsyncState as FileObject;
            try
            {
                int num = obj.fs.EndRead(ar);
                outputStream.Write(obj.buffer, 0, num);
                if (num < 1)
                {
                    obj.fs.Close(); //关闭文件流
                    outputStream.Close();//关闭输出流，如果不关闭，浏览器将一直在等待状态
                    obj.fs.Dispose();
                    outputStream.Dispose();
                    return;
                }
                obj.fs.BeginRead(obj.buffer, 0, obj.buffer.Length, new AsyncCallback(EndWrite), obj);
            }
            catch (Exception)
            {
                obj.fs?.Close();
                outputStream?.Close();
                obj.fs?.Dispose();
                outputStream?.Dispose();
            }
        }
    }
}

调用

项目根目录创建文件夹wwwroot

属性=>生成事件=>生成前事件命令行中添加

xcopy /Y /i /e $(ProjectDir)\wwwroot $(TargetDir)\wwwroot

项目中启动

public static string basePath = AppDomain.CurrentDomain.BaseDirectory;
public static string wwwrootPath = $"{basePath}wwwroot\\";
public void startHttpServer()
{
    new Thread(
        o =>
        {
            new ZServerHelper().Setup(wwwrootPath, 8899);
        }
    )
    { IsBackground = true }
    .Start();
}