ASP.NET MVC C# Razor Minification

本文关键字：Razor Minification MVC NET ASP | 更新日期: 2023-09-27 18:08:06

有人知道如何从Razor引擎输出最小化的HTML和JavaScript，同时保持自定义编码风格吗?

例如:我想要以下代码:

<div
    @if (Model.Name != string.Empty)
        @:id="@Model.Name"
>
</div>

输出为<div id="DivId"></div>

ASP.NET MVC C# Razor Minification

查看http://arranmaclean.wordpress.com/2010/08/10/minify-html-with-net-mvc-actionfilter/。这里有一个创建自定义动作过滤器的例子，可以从WhiteSpaces

中清除html。

更新:从上面引用的源代码。

删除"空格"的流类

using System;
using System.IO;
using System.Text;
using System.Web.Mvc;
using System.Text.RegularExpressions;
namespace RemoveWhiteSpace.ActionFilters
{
    public class WhiteSpaceFilter : Stream
    {
        private Stream _shrink;
        private Func<string, string> _filter;
        public WhiteSpaceFilter(Stream shrink, Func<string, string> filter)
        {
            _shrink = shrink;
            _filter = filter;
        }

        public override bool CanRead { get { return true; } }
        public override bool CanSeek { get { return true; } }
        public override bool CanWrite { get { return true; } }
        public override void Flush() { _shrink.Flush(); }
        public override long Length { get { return 0; } }
        public override long Position { get; set; }
        public override int Read(byte[] buffer, int offset, int count)
        {
            return _shrink.Read(buffer, offset, count);
        }
        public override long Seek(long offset, SeekOrigin origin)
        {
            return _shrink.Seek(offset, origin);
        }
        public override void SetLength(long value)
        {
            _shrink.SetLength(value);
        }
        public override void Close()
        {
            _shrink.Close();
        }
        public override void Write(byte[] buffer, int offset, int count)
        {
            // capture the data and convert to string 
            byte[] data = new byte[count];
            Buffer.BlockCopy(buffer, offset, data, 0, count);
            string s = Encoding.Default.GetString(buffer);
            // filter the string
            s = _filter(s);
            // write the data to stream 
            byte[] outdata = Encoding.Default.GetBytes(s);
            _shrink.Write(outdata, 0, outdata.GetLength(0));
        }
    }
}

ActionFilter类:

public class WhitespaceFilterAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        var request = filterContext.HttpContext.Request;
        var response = filterContext.HttpContext.Response;
        response.Filter = new WhiteSpaceFilter(response.Filter, s =>
                {
                    s = Regex.Replace(s, @"'s+", " ");
                    s = Regex.Replace(s, @"'s*'n's*", "'n");
                    s = Regex.Replace(s, @"'s*'>'s*'<'s*", "><");
                    s = Regex.Replace(s, @"<!--(.*?)-->", "");   //Remove comments
                    // single-line doctype must be preserved 
                    var firstEndBracketPosition = s.IndexOf(">");
                    if (firstEndBracketPosition >= 0)
                    {
                        s = s.Remove(firstEndBracketPosition, 1);
                        s = s.Insert(firstEndBracketPosition, ">");
                    }
                    return s;
                });
        }
}

和上面的用法:

[HandleError]
[WhitespaceFilter]
public class HomeController : Controller
{
     ...
}

也许你正在寻找Meleze。Web

Meleze。Web是一个优化ASP的工具箱。. NET MVC 3.0和MVC 4.0应用程序
它提供了HTML, JS和CSS的Razor视图的缩小和缓存返回的页面。

Darin Dimitrov写在这里:ASP。Net MVC Razor Views -在构建时最小化HTML

但我认为启用gzip是更好的解决方案，你可以在这里读到它:从ASP减少HTML输出。. MVC应用程序

我不认为有任何方法可以做到这一点。为了避免标签混乱，我通常更喜欢编写自定义帮助器:

@using(Html.MyDiv(Model.Name))
{
    ... put the contents of the div here
}
下面是自定义帮助器的样子: 
public static class HtmlExtensions
{
    private class Div : IDisposable
    {
        private readonly ViewContext context;
        private bool disposed;
        public Div(ViewContext context)
        {
            this.context = context;
        }
        public void Dispose()
        {
            this.Dispose(true);
            GC.SuppressFinalize(this);
        }
        protected virtual void Dispose(bool disposing)
        {
            if (!this.disposed)
            {
                this.disposed = true;
                context.Writer.Write("</div>");
            }
        }
    }
    public static IDisposable MyDiv(this HtmlHelper html, string id)
    {
        var div = new TagBuilder("div");
        if (!string.IsNullOrEmpty(id))
        {
            div.GenerateId(id);
        }
        html.ViewContext.Writer.Write(div.ToString(TagRenderMode.StartTag));
        return new Div(html.ViewContext);            
    }
}

或者你也可以做一个标签汤:

<div@Html.Raw(Model.Name != string.Empty ? string.Format(" id='"{0}'"", Html.AttributeEncode(Model.Name)) : string.Empty)>
</div>

对于对此感兴趣的人，我构建了一个简单的HTML缩小库，可以与MVC 5一起使用:

https://github.com/tompazourek/RazorHtmlMinifier.Mvc5

它在编译时而不是运行时操作，所以它不会增加任何性能开销。缩小非常简单(只是用一个空格替换很多空格)。

即使在缩小的HTML之上启用GZIP，它仍然可以减少有效负载大小。

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