ASP.NET Core快速入门之实战篇_实用技巧_

 public class DataContext : DbContext { //【注意】连接字符串一定要加 sslmode=none string str = @"Data Source=;Database=;User ID=;Password=;pooling=true;CharSet=utf8;port=3306;sslmode=none"; protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) => optionsBuilder.UseMySQL(str); //下面就可以添加要加入数据库的实体了 //public DbSet Messages { get; set; } }

 { "Logging": { "IncludeScopes": false, "LogLevel": { "Default": "Warning" } }, "ConnectionStrings": { "SqlServerConnection": "Data Source=;Database=;User ID=;Password=;pooling=true;CharSet=utf8;port=3306;sslmode=none" } }

 var connection = Configuration.GetConnectionString("SqlServerConnection"); services.AddDbContext(options => options.UseMySQL(connection));

 var Socket = new WebSocket(url);//创建 WebSocket 对象

 Socket.onopen = function(){ }

 Socket.onmessage //客户端接收服务端数据时触发 Socket.onerror //通信发生错误时触发 Socket.onclose //连接关闭时触发

 Socket.send() //使用连接发送数据 Socket.close() //关闭连接

 Socket.readyState 0 - 表示连接尚未建立。 1 - 表示连接已建立，可以进行通信。 2 - 表示连接正在进行关闭。 3 - 表示连接已经关闭或者连接不能打开。

 /// 
 /// 请求 /// 
 ///  public static void Map(IApplicationBuilder app) { app.UseWebSockets(); //【注意】需要 nuget 导入 Microsoft.AspNetCore.WebSockets.Server app.Use(Acceptor); }

 /// 
 /// 接收请求 /// 
 ///  ///  ///  static async Task Acceptor(HttpContext httpContext, Func n) {

 app.Map("/ws", SocketHandler.Map); //传入我们刚才新建的静态方法Map

 //建立连接 var socket = await httpContext.WebSockets.AcceptWebSocketAsync(); //等待接收数据 await socket.ReceiveAsync(new ArraySegment(buffer), CancellationToken.None); //发送消息 await socket.SendAsync(arraySegment, WebSocketMessageType.Text, true, CancellationToken.None);

 using (HttpClient http = new HttpClient()) { var htmlString = await http.GetStringAsync(url); HtmlParser htmlParser = new HtmlParser(); var jobInfos = htmlParser.Parse(htmlString) .QuerySelectorAll(".newlist_list_content table") .Where(t => t.QuerySelectorAll(".zwmc a").FirstOrDefault() != null) .Select(t => new JobInfo() { PositionName = t.QuerySelectorAll(".zwmc a").FirstOrDefault().TextContent, CorporateName = t.QuerySelectorAll(".gsmc a").FirstOrDefault().TextContent, Salary = t.QuerySelectorAll(".zwyx").FirstOrDefault().TextContent, WorkingPlace = t.QuerySelectorAll(".gzdd").FirstOrDefault().TextContent, .ToList(); return jobInfos; }

 server { listen 80; server_name www.haojima.net; #对应的域名 root /home/projects/messagBoard; #程序路径 location / { proxy_pass http://localhost:5000; #内网端口 proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection keep-alive; proxy_set_header Host $host; proxy_cache_bypass $http_upgrade; proxy_set_header X-real-ip $remote_addr; proxy_set_header Upgrade $http_upgrade; } }

 [program:MessageBoard] command=dotnet MessageBoard.dll ; 运行程序的命令 directory= /home/projects/messagBoard/ ; 命令执行的目录 autorestart=true ; 程序意外退出是否自动重启 stderr_logfile=/var/log/WebApplication1.err.log ; 错误日志文件 stdout_logfile=/var/log/WebApplication1.out.log ; 输出日志文件 environment=ASPNETCORE_ENVIRONMENT=Production ; 进程环境变量 user=root ; 进程执行的用户身份 stopsignal=INT

 server { listen 80; server_name www.haojima.net; root /home/projects/messagBoard; location / { proxy_pass http://localhost:5000; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection keep-alive; proxy_set_header Host $host; proxy_cache_bypass $http_upgrade; proxy_set_header X-real-ip $remote_addr; # 新添加 } }

 var ip = HttpContext.Request.Headers["X-real-ip"].FirstOrDefault();

 server { listen 80; server_name job.haojima.net; root /home/projects/jobWanted; location / { proxy_pass http://localhost:5002; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection keep-alive; proxy_set_header Host $host; proxy_cache_bypass $http_upgrade; proxy_set_header X-real-ip $remote_addr; proxy_set_header Upgrade $http_upgrade; # 新增 #proxy_set_header Connection "upgrade"; # 新增 proxy_set_header Connection $http_connection; #ws和post同时使用 https://github.com/aspnet/KestrelHttpServer/issues/1263 } }