今天来做个基于Nancy.Hosting.Self的小Demo。
关于Self Hosting Nancy，官方文档的介绍如下
https://github.com/NancyFx/Nancy/wiki/Self-Hosting-Nancy
文档具体的内容我就不一一翻译了，主要是演示从头到尾的一个过程，然后看看Nancy.Hosting.Self的源码
一、新建一个控制台应用程序(Console Application)
二、通过NuGet添加我们需要的Nancy包
这里我们可以直接添加Nancy.Hosting.Self，添加这个会顺带添加Nancy。
到这里我们的基本工作就KO了。
三、打开Program.cs，开始写代码了
1 class Program 2 { 3 static void Main(string[] args) 4 { 5 using (var nancySelfHost = new NancyHost(new Uri("http://localhost:8888/"))) 6 { 7 nancySelfHost.Start(); 8 Console.WriteLine("NancySelfHost已启动。。"); 9 try10 {11 Console.WriteLine("正在启动 http://localhost:8888/ ");12 System.Diagnostics.Process.Start("http://localhost:8888/");13 Console.WriteLine("成功启动 http://localhost:8888/ ");14 }15 catch (Exception)16 {17 }18 Console.Read();19 }20 Console.WriteLine("http://localhost:8888 已经停止 \n NancySelfHost已关闭。。"); 21 }22 }Program.cs 这里实例化了一个新的NancyHosting，并直接用Process.Start打开了一个网页。
这样做是为了省时省力偷下懒，不用在启动程序之后再手动去打开浏览器去输入http://localhost:8888
如果不熟悉Process，可以看一下这个
https://msdn.microsoft.com/en-us/library/e8zac0ca(v=vs.110).aspx
四、新建一个Modules文件夹，用来存放我们的Modules
在Modules文件夹新建一个HomeModule.cs
1 public class HomeModule:NancyModule2 {3 public HomeModule()4 {5 Get["/"] = _ => "I'm from Nancy.Hosting.Self!";6 }7 } HomeModule.cs 运行一下，看看效果
正是我们要的结果。下面来看看视图有没有问题。
五、建一个Views文件夹，用于存放视图
新建Home文件夹，新建index.html，这里我们就不用Razor了，Nancy支持多种视图引擎！！这个很不错。
1 <!DOCTYPE html> 2 <html lang="en" xmlns="http://www.w3.org/1999/xhtml"> 3 <head> 4 <meta charset="utf-8" /> 5 <title>NancyDemo</title> 6 </head> 7 <body> 8 <p style="font-size:xx-large">SelfHostingDemo</p> 9 </body>10 </html>index.html
同时对HomeModule.cs进行修改
1 public class HomeModule:NancyModule 2 { 3 public HomeModule() 4 { 5 Get["/"] = _ => 6 { 7 return View["index"]; 8 }; 9 10 }11 }HomeModule.cs 运行试试。oh no~~ 出错了。。。
为什么会出现错误呢？不应该啊！！
既然有错误，就要排除错误，看看它说那里有问题：
Nancy.RequestExecutionException: Oh noes! ---> Nancy.ViewEngines.ViewNotFoundException: Unable to locate view 'index'Currently available view engine extensions: sshtml,html,htmLocations inspected: views/Home/index-zh-CN,views/Home/index,Home/index-zh-CN,Home/index,views/index-zh-CN,views/index,index-zh-CN,indexRoot path: D:\GithubCode\Demos\NancyDemoWithSelfHosting\SelfHostingDemo\SelfHostingDemo\bin\DebugIf you were expecting raw data back, make sure you set the 'Accept'-header of the request to correct format, for example 'application/json'提示的居然是没有找到视图！！再细细看一下就会发现问题了。Root path！！！！视图应该在放到Debug目录下，这里建的是控制台应用程序，不是web应用程序。所以就把Views文件夹搬家到Debug下面。运行看看，OK，成功了<strong>六、把这个demo放到linux下看看</strong>在 /var/www/ 下面新建一个文件夹 mkdir nancydemo将程序bin目录下的文件传到 /var/www/nancydemo 中，ls看一下里面的内容执行 mono SelfHostingDemo.exe看看效果，OK！到这里，已经完成了一个简单的Demo了。趁着时间还早，看看Nancy.Hosting.Self的内部实现，源码地址：https://github.com/NancyFx/Nancy/tree/master/src/Nancy.Hosting.Self还记得否？我们的Program.cs中有用到这个类----NancyHost
var nancySelfHost = new NancyHost(new Uri("http://localhost:8888/")) 细细看看这个类里面有什么东西。https://github.com/NancyFx/Nancy/blob/master/src/Nancy.Hosting.Self/NancyHost.cs
有六个重载，其实这六个重载都是为了初始化 NancyHost ，有三个是用了默认配置，有三个是用了自定义配置。
我们用到的NancyHost是采用的默认配置，参数就是一个可变的Uri数组。
然后看看Start 方法
主要是监听我们的请求，这个监听过程主要用到了HttpListener，还有异步回调。
里面的 Task.Factory.StartNew 可以看看msdn的介绍
https://msdn.microsoft.com/en-us/library/dd321439(v=vs.110).aspx
持续降温。。注意保暖。。
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