![]() Resizing follows redirects internally, so the redirects are cached too.īecause responses from Workers themselves are not cached at the edge, purging of Worker URLs does nothing. Source image is cached using regular caching rules. Results of image processing are cached for one hour or longer if origin server's Cache-Control header allows. The Worker code is always executed and uncached. Image requests consists of two parts: running Worker code, and image processing. However, in cases where customers agree to store such images in public cache, Cloudflare supports resizing images through Workers on authenticated origins.Ĭhanges to image dimensions or other resizing options always take effect immediately - no purging necessary. This is because we have to have one public cache for resized images, and it would be unsafe to share images that are personalized for individual visitors. Image requests to the origin will be anonymized (no cookies, no auth, no custom headers). GIF animations are limited to 100 megapixels total (sum of sizes of all frames).Īuthorization and cookies are not supported Maximum image size is 100 megapixels (e.g. Please contact support if you encounter these errors. If the problem persists, please contact support. This may happen briefly after purging an entire zone or when requesting files with huge dimensions. 9524 - /cdn-cgi/image/ resizing service could not perform resizing, probably because the image URL was intercepted by a Worker.The origin server may be down or overloaded. 9421 - Origin redirected too many times.9420 - Origin server redirected to an invalid URL.9413 - The image is too large (exceeds 10,000 pixels width or height).This usually happens when an invalid URL is specified, or server-side software has printed an error, or presented a login page. 9412 - Origin returned a non-image, for example an HTML page.This is most likely a problem with the origin server-side software, not image resizing. 9509 - Origin returned 5xx HTTP status code.The origin server may be denying access to the image. 9408 - Origin returned 4xx HTTP status code.The image does not exist on the origin server, or a wrong URL was given to resize. 9404 - Origin returned 404 HTTP status code.9407 - Origin domain name lookup error.9406 & 9419 - Invalid image URL specified (for example, contains spaces, unescaped Unicode, or non-HTTP/S URL).The service was asked to resize an already-resized image, or the Worker has fetched its own URL. 9402 - Download of the original image failed, for example because the image was too large or the connection was interrupted. ![]() 9401 - Missing or invalid required arguments in options, for example width is not a number.When resizing fails, the response body contains an error message explaining the reason, as well as the Cf-Resized header containing err=code: You must deploy the Worker and test from another browser tab instead. Preview in the Editor in Cloudflare Dashboard does not simulate image resizing.Do not use Workers scoped to the entire domain /*. Resizing is "forgotten" as soon as one Worker calls another. There is another Worker running on the same request.Image Resizing feature is not enabled in the Cloudflare Dashboard.Authorization and cookies are not supportedĭoes the response have a Cf-Resized header? If not, then resizing has not been attempted.Worker + a WASM binding that resizes the image on the fly (they made this as a WebAssembly proof of concept) Store the image in an array buffer in their KV store Custom Origin Resizer + cache everything + ignore query strings via worker script to make custom cache keys Custom Origin Resizer + cache everything + ignore query strings via custom cache keys (Enterprise) Custom Origin Resizer and Mirage/Polish whatever on their +plans Custom Origin Resizer + tiered CF cache everything ![]() Custom Origin Resizer + normal CF cache everything To spat off a few ways someone could do similar image stuff, all roughly with them pretty effectively, varying trade-offs of course (origin load, no origin, cost, etc.): I am interested in seeing pricing but another (no offense Cloudflare folks) annoying in-the-dark beta. I easily see it and am especially looking forward to the more and more originless options. They really are pressing to become the backbone to easy app development. What’s exciting is the range of options Cloudflare offers for essentially the same thing. ![]()
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