Question

我正在使用以下代码来快速缩小我的CSS：

namespace MyCMS.Modules
{
    public class CSSModule : IHttpModule
    {
        void IHttpModule.Dispose()
        {
            throw new NotImplementedException();
        }

        void IHttpModule.Init(HttpApplication context)
        {
            context.BeginRequest += new EventHandler(context_BeginRequest);
        }

        void context_BeginRequest(object sender, EventArgs e)
        {
            HttpApplication app = (HttpApplication)sender;
            HttpContext context = app.Context;

            if (app.Request.RawUrl.Contains(".css"))
            {
                context.Response.Filter = new CSSFilter(app.Response.Filter);
            }
        }

        private class CSSFilter : Stream
        {
            public CSSFilter(Stream sink) { _sink = sink; }
            private Stream _sink;

            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() { _sink.Flush(); }
            public override long Length { get { return 0; } }
            private long _position;
            public override long Position
            {
                get { return _position; }
                set { _position = value; }
            }

            public override int Read(byte[] buffer, int offset, int count) { return _sink.Read(buffer, offset, count); }
            public override long Seek(long offset, SeekOrigin origin) { return _sink.Seek(offset, origin); }
            public override void SetLength(long value) { _sink.SetLength(value); }
            public override void Close() { _sink.Close(); }
            public override void Write(byte[] buffer, int offset, int count)
            {
                byte[] data = new byte[count];
                Buffer.BlockCopy(buffer, offset, data, 0, count);
                string html = System.Text.Encoding.Default.GetString(buffer);

                html = Yahoo.Yui.Compressor.CssCompressor.Compress(html,0, Yahoo.Yui.Compressor.CssCompressionType.Hybrid, true);

                byte[] outdata = System.Text.Encoding.Default.GetBytes(html);
                _sink.Write(outdata, 0, outdata.GetLength(0));
            }
        }
    }
}

问题是，GZip的CRC（在服务器上启用）失败。我确实理解为什么它失败了，因为文件内容是X，现在是Y（缩小），并且原始CRC计算为X，而不是Y。

我该怎么做才能解决这个问题？

Answer 1

我用CSSModule创建了一个示例MVC应用程序，

使用out模块，Site.css大小为~6kb。

使用模块Site.css size~1kb。

可能会帮助你。

链接：http://www.mediafire.com/?a86fqg1zqy44ssc

http://www.sendspace.com/file/exxrj5

使用HttpModule修改css文件（minify）：GZip CRC检查失败

1 个答案: