TerribleDev/blog.terrible.dev
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make etag a middleware before output cache

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This commit is contained in:
Tommy Parnell
2022-06-19 14:29:01 -04:00
parent 72824b70a0
commit f97bc8d938
2 changed files with 10 additions and 14 deletions
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14
src/TerribleDev.Blog.Web/Filters/ETagFilter.cs
View File

@@ -11,24 +11,10 @@ namespace TerribleDev.Blog.Web.Filters
{
public static string staticEtag = MD5.Create().ComputeHash(Encoding.UTF8.GetBytes(DateTimeOffset.Now.ToUnixTimeMilliseconds().ToString())).ToHexString().Substring(0,8);
public static ConcurrentDictionary<string, string> cache = new ConcurrentDictionary<string, string>();
public override void OnActionExecuting(ActionExecutingContext context)
{
var etag = context.HttpContext.Request.Headers["If-None-Match"];
if(etag == staticEtag)
{
Console.WriteLine("ETAG HIT");
context.Result = new StatusCodeResult(304);
}
else
{
base.OnActionExecuting(context);
}
}
public override void OnActionExecuted(ActionExecutedContext context)
{
if(context.HttpContext.Response.StatusCode >= 200 && context.HttpContext.Response.StatusCode < 300 && context.HttpContext.Response.Headers.ETag.Count == 0)
{
Console.WriteLine("ETAG MISS");
context.HttpContext.Response.Headers.Add("ETag", staticEtag);
}
}

10
src/TerribleDev.Blog.Web/Startup.cs
View File

@@ -141,6 +141,16 @@ namespace TerribleDev.Blog.Web
// },
UpgradeInsecureRequests = true
});
app.Use(async (context, next) => {
var etag = context.Request.Headers.IfNoneMatch.ToString();
if(etag != null && string.Equals(etag, StaticETag.staticEtag, StringComparison.Ordinal))
{
context.Response.StatusCode = 304;
await context.Response.CompleteAsync();
return;
}
await next();
});
if(Env.IsProduction())
{
app.UseOutputCaching();