URLresponse is not retrieved after storing in cache using storeCachedResponse

Question

Goal

I\'m trying to inject data/response from URLRequest into another URLRequest in my cache.

Setup

This is just a sample code. It\'s re

Answer 1

This isn't a complete answer, but it should put you in the right direction.

The issue isn't to do with your code, I believe that it's mostly fine. The issue is regarding the response that you get from the landscapeURLString because the image is stored in Cloudflare. If you use 2 images from the same source, (e.g. try with this bear from wikipedia instead of the image from images.pexels.com) it should work.

I tried printing out the response and headers of downloading the images.pexels.com image and this is what I saw:

response:  { URL: https://upload.wikimedia.org/wikipedia/commons/e/e0/Large_Scaled_Forest_Lizard.jpg } { Status Code: 200, Headers {
    "Accept-Ranges" =     (
        bytes
    );
    "Cache-Control" =     (
        "public, max-age=31536000"
    );
    "Content-Length" =     (
        997361
    );
    "Content-Type" =     (
        "image/jpeg"
    );
    Date =     (
        "Wed, 31 Oct 2018 11:38:52 GMT"
    );
    Expires =     (
        "Thu, 31 Oct 2019 11:38:52 GMT"
    );
    "Last-Modified" =     (
        "Fri, 26 Oct 2018 6:31:56 GMT"
    );
    Server =     (
        cloudflare
    );
    Vary =     (
        "Accept-Encoding"
    );
    "cf-cache-status" =     (
        HIT
    );
    "cf-ray" =     (
        "4725d67b0ae461bd-BCN"
    );
    "expect-ct" =     (
        "max-age=604800, report-uri=\"https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct\""
    );
    "x-cache" =     (
        "HIT, MISS"
    );
    "x-content-type-options" =     (
        nosniff
    );
    "x-served-by" =     (
        "cache-lax8643-LAX, cache-mad9437-MAD"
    );
} }
headers: ["Accept-Ranges": "bytes", "Content-Type": "image/jpeg", "Last-Modified": "Fri, 26 Oct 2018 6:31:56 GMT", "Vary": "Accept-Encoding", "cf-ray": "4725d67b0ae461bd-BCN", "Date": "Wed, 31 Oct 2018 11:38:52 GMT", "Server": "cloudflare", "Expires": "Thu, 31 Oct 2019 11:38:52 GMT", "x-content-type-options": "nosniff", "expect-ct": "max-age=604800, report-uri=\"https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct\"", "x-cache": "HIT, MISS", "x-served-by": "cache-lax8643-LAX, cache-mad9437-MAD", "cf-cache-status": "HIT", "Content-Length": "997361", "Cache-Control": "public, max-age=31536000"]

There's probably something in there that is trying to match the request URL with a response field that's causing the cache miss, but I'm not knowledgable enough to know what it is. Somebody else can probably catch it for you (hence why I said that this answer is incomplete).