| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef COBALT_MEDIA_BLINK_CACHE_UTIL_H_ |
| #define COBALT_MEDIA_BLINK_CACHE_UTIL_H_ |
| |
| #include <stdint.h> |
| |
| #include <vector> |
| |
| #include "base/time.h" |
| #include "cobalt/media/blink/media_blink_export.h" |
| |
| namespace blink { |
| class WebURLResponse; |
| } |
| |
| namespace media { |
| |
| // Reasons that a cached WebURLResponse will *not* prevent a future request to |
| // the server. Reported via UMA, so don't change/reuse previously-existing |
| // values. |
| enum UncacheableReason { |
| kNoData = 1 << 0, // Not 200 or 206. |
| kPre11PartialResponse = 1 << 1, // 206 but HTTP version < 1.1. |
| kNoStrongValidatorOnPartialResponse = 1 << 2, // 206, no strong validator. |
| kShortMaxAge = 1 << 3, // Max age less than 1h (arbitrary value). |
| kExpiresTooSoon = 1 << 4, // Expires in less than 1h (arbitrary value). |
| kHasMustRevalidate = 1 << 5, // Response asks for revalidation. |
| kNoCache = 1 << 6, // Response included a no-cache header. |
| kNoStore = 1 << 7, // Response included a no-store header. |
| kMaxReason // Needs to be one more than max legitimate reason. |
| }; |
| |
| // Return the logical OR of the reasons "response" cannot be used for a future |
| // request (using the disk cache), or 0 if it might be useful. |
| uint32_t MEDIA_BLINK_EXPORT |
| GetReasonsForUncacheability(const blink::WebURLResponse& response); |
| |
| // Returns when we should evict data from this response from our |
| // memory cache. Note that we may still cache data longer if |
| // a audio/video tag is currently using it. Returns a TimeDelta |
| // which is should be added to base::Time::Now() or base::TimeTicks::Now(). |
| base::TimeDelta MEDIA_BLINK_EXPORT |
| GetCacheValidUntil(const blink::WebURLResponse& response); |
| |
| } // namespace media |
| |
| #endif // COBALT_MEDIA_BLINK_CACHE_UTIL_H_ |