Question

Customer has requested, that all links to external pages in our sitecore solution should have a nofollow attribute. Which pipeline should I use to have an access to response html (to change the links before they will be delivered with markup to browser)? Or is there any better solution to accomplish this?

JavaScript is not much helpful here because I am not sure if all search engines are able to run JavaScript.

RenderField processor is also not usable, due to many custom tags in our code

Answer 1

您可以使用Sitecore.Pipelines.HttpRequest 并在ExecuteRequest之后进行补丁。

在这一点上，您拥有完全呈现的html，包括HTML缓存中的所有缓存组件。

编辑添加示例：

#region Using
using System;
using System.IO;

using Sitecore.Pipelines.HttpRequest;

#endregion

namespace MySpace.Sitecore.Pipelines
{

    public class MyProcessor : HttpRequestProcessor
    {

        public override void Process(HttpRequestArgs args)
        {

            if (!global::Sitecore.Context.PageMode.IsPageEditor)
            {
                if (!args.Context.Request.RawUrl.Contains(".") || (args.Context.Request.RawUrl.ToLower().Contains(".aspx") && !args.Context.Request.RawUrl.ToLower().StartsWith("/sitecore")))
                {
                    args.Context.Response.Filter = new MyInterestFilter(args.Context.Response.Filter);
                }
            }
        }

        #region Stream filter

        public class MyInterestFilter : Stream
        {

            public MyInterestFilter(Stream sink)
            {
                _sink = sink;
            }

            private Stream _sink;

            #region Properites

            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; }
            }

            #endregion

            #region Methods

            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 = MyReplace(html);

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

            public static string MyReplace(string html)
            {

                 html = html.Replace("TESTSTRING", "REPLACEDTESTSTRING");

                return html;
            }

            #endregion

        }

        #endregion

    }
}

并在App_Config include目录中设置一个补丁文件，如下所示：

<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/">
  <sitecore>
    <pipelines>
      <httpRequestBegin>
        <processor type="MySpace.Sitecore.Pipelines.MyProcessor, MySpace.Sitecore" patch:after="processor[@type='Sitecore.Pipelines.HttpRequest.ExecuteRequest, Sitecore.Kernel']"/>
      </httpRequestBegin>
    </pipelines>
  </sitecore>
</configuration>

为每个<a> tag with external link after the page was rendered

1 个答案: