Feature Request: Allow for customization of the cache mechanism.

[Jorghi12]

Describe the bug FastImage's caching approach compares whole url addresses, whereas I'd need more fine-grained control here.

To Reproduce Due to differences in the url params that correspond to various auth keys, you can have identical images with distinct urls on most image hosting platforms, leading to a cache miss in FastImage.

[Example of cache miss] https://unsplash.it/thisIsMyImage.jpg?key=1324y2389472398423 https://unsplash.it/thisIsMyImage.jpg?key=asdbfjhfsd89812812102

Expected behavior FastImage should allow you to define the cache's equality check, ideally via a prop argument.

function cacheHash(imageAddress) {
     return imageAddress.slice(0, imageAddress.find("?"))
}

<FastImage
        style={{ width: 200, height: 200 }}
        source={{
            uri: 'https://unsplash.it/thisIsMyImage.jpg?key=1324y2389472398423',
            headers: { Authorization: 'someAuthToken' },
            priority: FastImage.priority.normal,
        }}
        cacheHash={cacheHash}
        resizeMode={FastImage.resizeMode.contain}
    />

Dependency versions

• React Native version: 0.64.12
• React version: 17.0.21
• React Native Fast Image version: 8.5.11

[Jorghi12]

If the primary maintainers want, I'd be happy to implement this feature.

[Aryk]

This would be a great add-on.. @Jorghi12 did you make any progress on this?

[hanxiaofeng]

did you make any progress on this?