Question

任何人都可以了解citebite如何实现它的缓存，特别是它如何能够显示与原始页面具有相同布局的缓存？

我希望实现非常相似的东西：我使用

从源代码中提取html

public static string sourceCache (string URL)
{
        string sourceURL = URL;
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(sourceURL);
        HttpWebResponse response = (HttpWebResponse)request.GetResponse();

        if (response.StatusCode == HttpStatusCode.OK)
        {
            Stream receiveStream = response.GetResponseStream();
            StreamReader readStream = null;

            if (response.CharacterSet == null)
            {
                readStream = new StreamReader(receiveStream);
            }
            else
            {
                readStream = new StreamReader(receiveStream, Encoding.GetEncoding(response.CharacterSet));
            }

            string data = readStream.ReadToEnd();

            response.Close();
            readStream.Close();

            return data;
        }

        return "couldn't retrieve cache";
    }
}

然后我将其发送到存储为nvarchar(max)的数据库。当加载页面以显示缓存时，我拉出字段并将其设置为div属性的innerhtml。

然而，在citebite上，他们的缓存保留了源页面的样式和布局，而我的缓存却没有。

我哪里错了？

我有一个asp.net 4.5 c #Web表单网站

Answer 1

为此页面创建一个，查看源代码。秘密是

<base href="http://stackoverflow.com/questions/28432505/how-does-cite-bite-acheive-its-cache" />

HTML Base Element（）指定用于所有人的基本URL 文档中包含的相对URL。最多只有一个文档中的元素。

Answer 2

根据上面的@Alex K，基本元素似乎是个问题。

我修改了代码以检查现有的html是否有＆＃34; base href＆＃34;在其中，如果没有插入基础元素，并将href设置为源URL

public static string sourceCache (string URL)
    {
        string sourceURL = URL;
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(sourceURL);
        HttpWebResponse response = (HttpWebResponse)request.GetResponse();

        if (response.StatusCode == HttpStatusCode.OK)
        {
            Stream receiveStream = response.GetResponseStream();
            StreamReader readStream = null;

            if (response.CharacterSet == null)
            {
                readStream = new StreamReader(receiveStream);
            }
            else
            {
                readStream = new StreamReader(receiveStream, Encoding.GetEncoding(response.CharacterSet));
            }

            string data = readStream.ReadToEnd();

            response.Close();
            readStream.Close();

            if (data.Contains("base href"))
            {
                return data;
            }
            else
            {
                //we need to insert the base href with the source url
                data = basecache(data, URL);
                return data;
            }                
        }

        return "couldn't retrieve cache";
    }

    public static string basecache (string htmlsource, string urlsource)
    {
        //make sure there is a head tag
        if (htmlsource.IndexOf("<head>") != -1)
        {
            int headtag = htmlsource.IndexOf("<head>");
            string newhtml = htmlsource.Insert(headtag + "<head>".Length, "<base href='" + urlsource + "'/>");
            return newhtml;
        }
        else if(htmlsource.IndexOf("&lt;head&gt;") != -1)
        {
            int headtag = htmlsource.IndexOf("&lt;head&gt;");
            string newhtml = htmlsource.Insert(headtag + "&lt;head&gt;".Length, "<base href='" + urlsource + "'/>");
            return newhtml;
        }
        else
        {
            return htmlsource;
        }
    }

到目前为止，我只是在一些网站/域名上进行了测试，但它似乎有效，非常感谢Alex的帮助。

如何引用它来实现它的缓存？

2 个答案: