使用HttpHandler 来实现url路径伪静态

亦凉 2022-08-27 03:52 167阅读 0赞

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需要在web.config中配置 httpHandlers节点：

<system.web>
        <httpHandlers>
          <add verb="*" path="news/*.html" type="WebApplication2.HttpHandlerDemo"/>
        </httpHandlers>
        。。。。
      </system.web>

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HttpHandlerDemo代码：

using System;
    using System.Data;
    using System.IO;
    using System.Text;
    using System.Text.RegularExpressions;
    using System.Web;
    
    namespace WebApplication2
    {
        public class HttpHandlerDemo : IHttpHandler
        {
            public bool IsReusable
            {
                get { return false; }
            }
    
            public void ProcessRequest(HttpContext context)
            {
                string url = context.Request.RawUrl; //取到url路径
                //获取news/1.html里面的1数字（正则表达式取到对应的id）
                string uid = new Regex(@"/\d+.").Match(url).Value.Replace("/", "").Replace(".", "");
                string path = context.Server.MapPath("~/news/" + uid + ".html"); //获取静态页面的物理路径
    
                string tmpPath = context.Server.MapPath("~/news/templete.html"); //获取模板的物理路径
                string tmphtml = getPath(tmpPath); //读取模板页，生成字符串
                News news = getNewsById(uid); //通过id获取到一行新闻数据
                //将字符串中的占位符替换成数据库得到的数据
                tmphtml = tmphtml
                    .Replace("{$Title}", news.title)
                    .Replace("{$pubDate}", news.pubdate.ToString())
                    .Replace("{$content}", news.content);
                Saves(path, tmphtml);//将字符串生成静态页面
    
                context.Response.WriteFile(path);//输出
            }
    
            /// <summary>
            /// 保存生成的静态页
            /// </summary>
            void Saves(string savepath, string savehtml)
            {
                //创建路径制定的文件
                using (FileStream fs = new FileStream(savepath, FileMode.Create))
                {
                    using (StreamWriter sw = new StreamWriter(fs, Encoding.Default))
                    {
                        sw.Write(savehtml);//将字符串写入到创建的文件里面
                    }
                }
            }
    
            /// <summary>
            /// 找到模板页
            /// </summary>
            string getPath(string path)
            {
                string str = string.Empty;
                if (!File.Exists(path)) { throw new Exception("没有找到模板"); }
                //如果有模板页，打开进行读取
                using (FileStream fs = new FileStream(path, FileMode.Open))
                {
                    using (StreamReader sr = new StreamReader(fs, Encoding.Default))
                    {
                        //字符串接收读取的读取的数据
                        str = sr.ReadToEnd();//读取完整的文件
                    }
                }
                return str;
            }
    
            /// <summary>
            /// id找到一行新闻数据
            /// </summary>
            News getNewsById(string id)
            {
                DataTable dt = getTable(id);
                News news = new News();
                news.title = dt.Rows[0]["title"].ToString();
                news.pubdate = DateTime.Parse(dt.Rows[0]["pubdate"].ToString());
                news.content = dt.Rows[0]["content"].ToString();
                return news;
            }
            DataTable getTable(string id)
            {
                string sql = string.Format("select * from news where id={0}", int.Parse(id));
                return SqlHelper.GetTable(sql);
            }
        }
    }

[SouthEast]: /images/20220824/59687614db514fe89849a11c354cd712.png
[SouthEast 1]: /images/20220824/40b29aee38114376b286ae28ac12890c.png