How can I configure Sitecore so that it generates absolute links to media items?

问题

<sc:Image> and <sc:FieldRenderer>, when rendering a MediaItem, generate html code that looks like the following:

<img src="~/media/twitter.gif" alt="Twitter" width="100" height="22" />

Notice the relative path used in src attribute: this means that when such an image is reused on multiple pages, the browser has to fetch it multiple times (e.g. on page http://example.com/ and http://example.com/about-us/). When I generate the img tag in code, I can use the following snippet to force an absolute URL:

string url = Sitecore.StringUtil.EnsurePrefix('/',
    Sitecore.Resources.Media.MediaManager.GetMediaUrl(media));

How can I configure Sitecore to force the leading slash in media urls?

Using Reflector I can see that MediaOptions.AbsolutePath controls the behaviour that I want to achieve, but I don't know how can I set it for Sitecore built-in controls. Setting Media.MediaLinkPrefix or mediaPrefixes in web.config doesn't seem to change anything.

回答1:

I worked on a project where we stored media assets on Akamai's CDN, so we had to change how the media URLs resolved.

We adapted the built-in LinkProvider class by changing ExpandDynamicLinks(). We also adapted Sitecore.Resources.Media.MediaProvider and updated the GetMediaUrl() method.

These were to handle links to images generated by field renderers and links created within a Rich Text editor.

回答2:

There's a much easier solution to this. I may be a little off with my syntax - please feel free to correct me and I'll make edits.

MediaManager.GetItemUrl(item, new MediaUrlOptions { AbsolutePath = true });

回答3:

Create a Link to Sitecore Media Item

You will not be able to fetch the Media Item using the above LinkManager.GetItemUrl() Method. Sitecore has a separate API to fetch the Media URLs.

public string ResolveSitecoreMediaURL(Sitecore.Data.Items.Item item)
{
   MediaUrlOptions mediaOptions= new MediaUrlOptions();
   mediaOptions.AlwaysIncludeServerUrl = true;
   mediaOptions.AbsolutePath =true;
   return Sitecore.Resources.Media.MediaManager.GetMediaUrl(item,mediaOptions);
}

Like LinkManager had the URLOptions MediaManager comes with a MediaUrlOptions where you can control the absolute and relative URLs.

来源：https://stackoverflow.com/questions/5977809/how-can-i-configure-sitecore-so-that-it-generates-absolute-links-to-media-items

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