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Improve cache handling and error resilience

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Enhances cache logic to ensure compatibility with non-Cloudflare environments by checking for cache API availability. Refactors cache key construction to always use GET method, adds error handling for cache operations, and ensures only GET requests are cached. Improves robustness and prevents runtime errors when cache API is unavailable.
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xixu-me committed 2025-11-16 20:50:13 +08:00
1 parent 5a6ae81a9a
commit ef3dec1754
1 file changed
+67 -34
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src/index.js
+67 -34
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@@ -847,34 +847,44 @@ async function handleRequest(request, env, ctx) {
const isAI = isAIInferenceRequest(request, url);
// Check cache first (skip cache for Git, Git LFS, Docker, and AI inference operations)
/** @type {Cache} */
// Note: caches API is only available in Cloudflare Workers, not in standard environments
/** @type {Cache | null} */
// @ts-ignore - Cloudflare Workers cache API
const cache = caches.default;
const cache = typeof caches !== 'undefined' && caches.default ? caches.default : null;
let response;
if (!isGit && !isGitLFS && !isDocker && !isAI) {
// For Range requests, try cache match first
const cacheKey = new Request(targetUrl, request);
response = await cache.match(cacheKey);
if (response) {
monitor.mark('cache_hit');
return response;
}
// If Range request missed cache, try with original request to see if we have full content cached
const rangeHeader = request.headers.get('Range');
if (rangeHeader) {
const fullContentKey = new Request(targetUrl, {
method: request.method,
headers: new Headers(
[...request.headers.entries()].filter(([k]) => k.toLowerCase() !== 'range')
)
if (cache && !isGit && !isGitLFS && !isDocker && !isAI) {
try {
// For Range requests, try cache match first
// Always use GET method for cache key to match how we store (cache.put only accepts GET)
const cacheKey = new Request(targetUrl, {
method: 'GET',
headers: request.headers
});
response = await cache.match(fullContentKey);
response = await cache.match(cacheKey);
if (response) {
monitor.mark('cache_hit_full_content');
monitor.mark('cache_hit');
return response;
}
// If Range request missed cache, try with original request to see if we have full content cached
const rangeHeader = request.headers.get('Range');
if (rangeHeader) {
const fullContentKey = new Request(targetUrl, {
method: 'GET', // Always use GET method for cache key consistency
headers: new Headers(
[...request.headers.entries()].filter(([k]) => k.toLowerCase() !== 'range')
)
});
response = await cache.match(fullContentKey);
if (response) {
monitor.mark('cache_hit_full_content');
return response;
}
}
} catch (cacheError) {
// Cache API not available or failed - continue without caching
console.warn('Cache API unavailable:', cacheError);
}
}
@@ -1264,38 +1274,61 @@ async function handleRequest(request, env, ctx) {
});
// Cache successful responses (skip caching for Git, Git LFS, Docker, and AI inference operations)
// Only cache GET and HEAD requests to avoid "Cannot cache response to non-GET request" errors
// Only cache GET requests (HEAD requests cannot be cached due to Cache API limitations)
// IMPORTANT: Only cache 200 responses, NOT 206 responses (Cloudflare Workers Cache API rejects 206)
// Note: caching only works in Cloudflare Workers environment
if (
cache &&
!isGit &&
!isGitLFS &&
!isDocker &&
!isAI &&
['GET', 'HEAD'].includes(request.method) &&
request.method === 'GET' && // Only cache GET requests, not HEAD
response.ok &&
response.status === 200 // Only cache complete responses (200), not partial content (206)
) {
// For Range requests that resulted in 200, cache the full response
const rangeHeader = request.headers.get('Range');
// Always use GET method for cache key
const cacheKey = rangeHeader
? new Request(targetUrl, {
method: request.method,
method: 'GET',
headers: new Headers(
[...request.headers.entries()].filter(([k]) => k.toLowerCase() !== 'range')
)
})
: new Request(targetUrl, request);
: new Request(targetUrl, { method: 'GET' });
ctx.waitUntil(cache.put(cacheKey, finalResponse.clone()));
// If this was originally a Range request and we got a 200 (full content),
// try cache.match again with the original Range request to get 206 response
if (rangeHeader && response.status === 200) {
const rangedResponse = await cache.match(new Request(targetUrl, request));
if (rangedResponse) {
monitor.mark('range_cache_hit_after_full_cache');
return rangedResponse;
// Use waitUntil if available (Cloudflare Workers), otherwise cache synchronously
// Wrap in try-catch in case cache API fails
try {
if (ctx && typeof ctx.waitUntil === 'function') {
ctx.waitUntil(cache.put(cacheKey, finalResponse.clone()));
} else {
// In non-Workers environment, cache put happens synchronously
cache.put(cacheKey, finalResponse.clone()).catch(error => {
console.warn('Cache put failed:', error);
});
}
// If this was originally a Range request and we got a 200 (full content),
// try cache.match again with the original Range request to get 206 response
if (rangeHeader && response.status === 200) {
// Always use GET method for cache match, even for Range requests
const rangedResponse = await cache.match(
new Request(targetUrl, {
method: 'GET',
headers: request.headers
})
);
if (rangedResponse) {
monitor.mark('range_cache_hit_after_full_cache');
return rangedResponse;
}
}
} catch (cacheError) {
// Cache API not available or failed - continue without caching
console.warn('Cache put/match failed:', cacheError);
}
}