feat: support a way to override fetching behavior

[nathanchase]

What's the best way to cache responses with ohmyfetch via an LRU cache?

With axios, I've used axios-extensions's "cacheAdapterEnhancer" like so:

import { cacheAdapterEnhancer } from 'axios-extensions';
import LRU from 'lru-cache';
const ONE_HOUR = 1000 * 60 * 60;
const defaultCache = new LRU({ maxAge: ONE_HOUR });
const defaults = $axios.defaults;
defaults.adapter = cacheAdapterEnhancer(defaults.adapter, {
  enabledByDefault: false,
  cacheFlag: 'useCache',
  defaultCache,
});

which caches responses when I explicitly add useCache: true to the request.

Is there a similar enhancer for ohmyfetch, or one planned, or an example of how to implement caching with ohmyfetch?

[nathanchase]

Maybe something similar to this? https://mihanizm56.github.io/fetch-api/docs/examples/caching

[nozomuikuta]

As far as I see the code, currently there doesn't seem to be a point at which we can override fetching behavior (type of onRequest hook is void so it has no influence on the behavior).

I will add a label to this issue for now.

[nathanchase]

This was approximately the solution I came up with since I originally posted this issue:

// Create a new LRU cache with a maximum size of
// 100 items and a time-to-live of one hour
import LRU from 'lru-cache';
const cache = new LRU({
  max: 100,
  ttl: 1000 * 60 * 60, // One hour
});

async function attemptFetch() {
    try {
      const response = await fetchData(event.node.req.url,
        method,
        params,
        body,
        headers,
        authorization,
      );

      // Set the response in the cache
      cache.set(event.node.req.url, response);

      return response;
    }
    catch (error) {
      // Attempt to fetch the data
      return attemptFetch();
    }
}

// Check if the URL is already in the cache
if (!cache.get(event.node.req.url) {
    return attemptFetch();
} else {
    // If the URL is already in the cache, just return the cached response
    return await cache.get(event.node.req.url);
}

fetchData is just a wrapper for ofetch.