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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef CONTENT_BROWSER_LOADER_ASYNC_REVALIDATION_MANAGER_H_ | 5 #ifndef CONTENT_BROWSER_LOADER_ASYNC_REVALIDATION_MANAGER_H_ |
| 6 #define CONTENT_BROWSER_LOADER_ASYNC_REVALIDATION_MANAGER_H_ | 6 #define CONTENT_BROWSER_LOADER_ASYNC_REVALIDATION_MANAGER_H_ |
| 7 | 7 |
| 8 #include <map> | 8 #include <map> |
| 9 #include <memory> | 9 #include <memory> |
| 10 #include <string> | 10 #include <string> |
| 11 | 11 |
| 12 #include "base/macros.h" | 12 #include "base/macros.h" |
| 13 | 13 |
| 14 class GURL; | 14 class GURL; |
| 15 struct ResourceHostMsg_Request; | |
| 16 | 15 |
| 17 namespace net { | 16 namespace net { |
| 18 class URLRequest; | 17 class URLRequest; |
| 19 class HttpCache; | 18 class HttpCache; |
| 20 } | 19 } |
| 21 | 20 |
| 22 namespace content { | 21 namespace content { |
| 23 | 22 |
| 24 class AsyncRevalidationDriver; | 23 class AsyncRevalidationDriver; |
| 25 class ResourceContext; | 24 class ResourceContext; |
| 26 class ResourceScheduler; | 25 class ResourceScheduler; |
| 26 struct ResourceRequest; |
| 27 | 27 |
| 28 // One instance of this class manages all active AsyncRevalidationDriver objects | 28 // One instance of this class manages all active AsyncRevalidationDriver objects |
| 29 // for all profiles. It is created by and owned by | 29 // for all profiles. It is created by and owned by |
| 30 // ResourceDispatcherHostImpl. It also implements the creation of a new | 30 // ResourceDispatcherHostImpl. It also implements the creation of a new |
| 31 // net::URLRequest and AsyncRevalidationDriver from an existing net::URLRequest | 31 // net::URLRequest and AsyncRevalidationDriver from an existing net::URLRequest |
| 32 // that has had the stale-while-revalidate algorithm applied to it. | 32 // that has had the stale-while-revalidate algorithm applied to it. |
| 33 class AsyncRevalidationManager { | 33 class AsyncRevalidationManager { |
| 34 public: | 34 public: |
| 35 AsyncRevalidationManager(); | 35 AsyncRevalidationManager(); |
| 36 ~AsyncRevalidationManager(); | 36 ~AsyncRevalidationManager(); |
| 37 | 37 |
| 38 // Starts an async revalidation by copying |for_request|. |scheduler| must | 38 // Starts an async revalidation by copying |for_request|. |scheduler| must |
| 39 // remain valid until this object is destroyed. | 39 // remain valid until this object is destroyed. |
| 40 void BeginAsyncRevalidation(const net::URLRequest& for_request, | 40 void BeginAsyncRevalidation(const net::URLRequest& for_request, |
| 41 ResourceScheduler* scheduler); | 41 ResourceScheduler* scheduler); |
| 42 | 42 |
| 43 // Cancel all pending async revalidations that use ResourceContext. | 43 // Cancel all pending async revalidations that use ResourceContext. |
| 44 void CancelAsyncRevalidationsForResourceContext( | 44 void CancelAsyncRevalidationsForResourceContext( |
| 45 ResourceContext* resource_context); | 45 ResourceContext* resource_context); |
| 46 | 46 |
| 47 static bool QualifiesForAsyncRevalidation( | 47 static bool QualifiesForAsyncRevalidation(const ResourceRequest& request); |
| 48 const ResourceHostMsg_Request& request); | |
| 49 | 48 |
| 50 private: | 49 private: |
| 51 // The key of the map of pending async revalidations. This key has a distinct | 50 // The key of the map of pending async revalidations. This key has a distinct |
| 52 // value for every in-progress async revalidation. It is used to avoid | 51 // value for every in-progress async revalidation. It is used to avoid |
| 53 // duplicate async revalidations, and also to cancel affected async | 52 // duplicate async revalidations, and also to cancel affected async |
| 54 // revalidations when a ResourceContext is removed. | 53 // revalidations when a ResourceContext is removed. |
| 55 // | 54 // |
| 56 // Request headers are intentionally not included in the key for simplicity, | 55 // Request headers are intentionally not included in the key for simplicity, |
| 57 // as they usually don't affect caching. | 56 // as they usually don't affect caching. |
| 58 // | 57 // |
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| 99 // Map of AsyncRevalidationDriver instances that are currently in-flight: | 98 // Map of AsyncRevalidationDriver instances that are currently in-flight: |
| 100 // either waiting to be scheduled or active on the network. | 99 // either waiting to be scheduled or active on the network. |
| 101 AsyncRevalidationMap in_progress_; | 100 AsyncRevalidationMap in_progress_; |
| 102 | 101 |
| 103 DISALLOW_COPY_AND_ASSIGN(AsyncRevalidationManager); | 102 DISALLOW_COPY_AND_ASSIGN(AsyncRevalidationManager); |
| 104 }; | 103 }; |
| 105 | 104 |
| 106 } // namespace content | 105 } // namespace content |
| 107 | 106 |
| 108 #endif // CONTENT_BROWSER_LOADER_ASYNC_REVALIDATION_MANAGER_H_ | 107 #endif // CONTENT_BROWSER_LOADER_ASYNC_REVALIDATION_MANAGER_H_ |
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