Is there a way to get the hash from a path?

[johnnyoshika]

Given a path to a static asset (e.g. /js/foo.js), is there a way to get the hash (i.e. version / cache buster) of that file? The reason why I ask is that I have a special tag helper that lazy-loads scripts and I'd like to append the hash to the file path without using the WebOptimizer tag helper.

Great library, BTW!

[serkanyazicioglu]

@johnnyoshika could you find a solution for this? I'm stuck with the same issue right now. Thx...

[serkanyazicioglu]

Developed an extension for this, if anybody needs.

public static class PageExtensions
    {
        public static string AddBundleVersionToPath(this IRazorPage page, string path)
        {
            var context = page.ViewContext.HttpContext;
            var assetPipeline = context.RequestServices.GetService<WebOptimizer.IAssetPipeline>();

            if (assetPipeline.TryGetAssetFromRoute(path, out IAsset asset))
            {
                return string.Concat(path, "?v=", asset.GenerateCacheKey(context));
            }
            else
            {
                return path;
            }
        }
}

You should add your extension namespace to _ViewImports.cshtml. Then method can be used on any page.

_ViewImports.cshtml
@using Your.Extensions.Namespace

your.cshtml

var element = document.createElement("script");
element.src = "@this.AddBundleVersionToPath("/bundle-path.min.js")";

@madskristensen maybe this can be documented?

[christopherpickering]

@serkanyazicioglu Thanks for posting this!