如何维护开发站点和生产站点的 CDN 镜像链接？

发布于 2024-09-16 20:27:35 字数 328 浏览 10 评论 0原文

我有一个 ASP.NET MVC 应用程序，现在我想将其图像链接分离到 CDN。目前，图像通常具有以下标记代码：

<%= Html.ActionLinkWithImage("/Content/Img/Image1.png" ...

这在使用本地 Web 服务器 (Cassini) 的开发中以及在发布产品服务器时效果很好。
但现在我希望生产 URL 类似于：

http://cdn.com/Img/Image1.png

如何让它以一种简单的方式工作，以便它在开发中以及发布到产品后无缝工作？

原文

I have this ASP.NET MVC application that I now want to separate out the image links to a CDN.
At this moment, images typically have this markup code:

<%= Html.ActionLinkWithImage("/Content/Img/Image1.png" ...

This works fine in development using the local web server (Cassini), and also when published the prod server.
But now I want the production URL to something like:

http://cdn.com/Img/Image1.png

How do I get this to work in an easy way, so that it works seamlessly in dev and after published to prod?

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抹茶夏天i‖ 2024-09-23 20:27:35

您可以创建一个 URL 扩展方法，该方法将根据 Web.config 文件（或其他文件）中的值生成调试 URL 或实时 URL。

public static MvcHtmlString CDNImageLink(this UrlHelper url, string imageName)
{
    string urlFormat;
    if((bool)ConfigurationManager.AppSettings["Debug"])
        urlFormat = "/Content/Img/{0}";
    else
        urlFormat = "http://cdn.com/Img/{0}";

    return MvcHtmlString.Create(string.Format(urlFormat, imageName));
}

然后，您可以在需要图像 url 的任何地方使用此扩展方法（包括 Html 扩展方法）：

public static MvcHtmlString ActionLinkWithImage(this HtmlHelper html, string imageName)
{
     UrlHelper Url = new UrlHelper(html.ViewContext.RequestContext);
     string imageUrl = Url.CDNImageLink(imageName);
     // generate the rest of the ActionLink using the imageUrl
}

确保 Url 扩展方法所在的命名空间具有 using 语句，该语句位于文件顶部你在哪里声明了 HTML 扩展方法，否则它不会识别它。

You can create a URL extension method that will, depending on a value from the Web.config file (or something else), generate the debug URL or the live URL.

public static MvcHtmlString CDNImageLink(this UrlHelper url, string imageName)
{
    string urlFormat;
    if((bool)ConfigurationManager.AppSettings["Debug"])
        urlFormat = "/Content/Img/{0}";
    else
        urlFormat = "http://cdn.com/Img/{0}";

    return MvcHtmlString.Create(string.Format(urlFormat, imageName));
}

You can then use this extension method anywhere you need an image url (including Html extension methods):

public static MvcHtmlString ActionLinkWithImage(this HtmlHelper html, string imageName)
{
     UrlHelper Url = new UrlHelper(html.ViewContext.RequestContext);
     string imageUrl = Url.CDNImageLink(imageName);
     // generate the rest of the ActionLink using the imageUrl
}

Make sure you have the using statement for the namespace where the Url extension method is located at the top of the file where you declared the HTML extension method, otherwise it will not recognize it.

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