Assets HTTP Cache supported?

jionox · May 22, 2019, 5:44pm

How can we add an HTTP cache-control header to assets requests?

Sebastian · May 22, 2019, 6:28pm

There is nothing like that yet. What are you looking for?

jionox · May 24, 2019, 1:07am

Just trying to find out if Squidex is configured to set a caching policy for the image assets.

Sebastian · May 24, 2019, 9:05am

There is no caching policy but etags are provided:

github.com

Squidex/squidex/blob/master/src/Squidex/Areas/Api/Controllers/Assets/AssetContentController.cs#L126


    return DeliverAsset(entity, version, width, height, quality, mode);
}


private IActionResult DeliverAsset(IAssetEntity entity, long version, int? width, int? height, int? quality, string mode)
{
    if (entity == null || entity.FileVersion < version || width == 0 || height == 0 || quality == 0)
    {
        return NotFound();
    }


    Response.Headers[HeaderNames.ETag] = entity.FileVersion.ToString();


    return new FileCallbackResult(entity.MimeType, entity.FileName, true, async bodyStream =>
    {
        var assetId = entity.Id.ToString();


        if (entity.IsImage && (width.HasValue || height.HasValue || quality.HasValue))
        {
            var assetSuffix = $"{width}_{height}_{mode}";


            if (quality.HasValue)

Steven_Stark · October 28, 2021, 7:35pm

I know this is an old thread, I just wanted to share how I achieved this.

I was a bit surprised that assets don’t include Cache-Control, so I suspected it might be to do with the Caddy configuration I am using. After changing the configuration, cache-control is being sent in the response header and files are being cached in the browser.

This is my CaddyConfig:


{$SITE_ADDRESS}
tls /etc/ssl/certs/.......
reverse_proxy {$SITE_SERVER} {
  header_up X-ForwardedProto {scheme}
  header_up X-Real-IP {remote}
  header_down Cache-Control max-age=3600
}

Sebastian · October 31, 2021, 8:02pm

You can also control the cache duration via query string.

Just add &cache=3600 to your URLs. Then you can distinguish per asset what the best approach is. But some users update the assets regularly, so caching would be bad for them.