Add Keys() function to ServiceWorkerCache.

content/browser/service_worker/service_worker_cache.h

 // Copyright 2014 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 CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CACHE_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CACHE_H_
 
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/memory/weak_ptr.h"
 #include "content/common/service_worker/service_worker_types.h"
 #include "net/base/completion_callback.h"
 #include "net/disk_cache/disk_cache.h"
 
 namespace net {
 class URLRequestContext;
 class IOBufferWithSize;
 }
 
 namespace storage {
 class BlobData;
 class BlobDataHandle;
 class BlobStorageContext;
 }
 
 namespace content {
 class ChromeBlobStorageContext;
+class ServiceWorkerRequestResponseHeaders;
 
 // TODO(jkarlin): Unload cache backend from memory once the cache object is no
 // longer referenced in javascript.
 
 // Represents a ServiceWorker Cache as seen in
 // https://slightlyoff.github.io/ServiceWorker/spec/service_worker/index.html.
 // InitializeIfNeeded must be called before calling the other public members.
 class CONTENT_EXPORT ServiceWorkerCache {
  public:
   enum ErrorType {
     ErrorTypeOK = 0,
     ErrorTypeExists,
     ErrorTypeStorage,
     ErrorTypeNotFound
   };
   enum EntryIndex { INDEX_HEADERS = 0, INDEX_RESPONSE_BODY };
   typedef base::Callback<void(ErrorType)> ErrorCallback;
   typedef base::Callback<void(ErrorType,
                               scoped_ptr<ServiceWorkerResponse>,
                               scoped_ptr<storage::BlobDataHandle>)>
       ResponseCallback;
+  typedef std::vector<ServiceWorkerFetchRequest> Requests;
+  typedef base::Callback<void(ErrorType, scoped_ptr<Requests>)>
+      RequestsCallback;
+
   static scoped_ptr<ServiceWorkerCache> CreateMemoryCache(
       net::URLRequestContext* request_context,
       base::WeakPtr<storage::BlobStorageContext> blob_context);
   static scoped_ptr<ServiceWorkerCache> CreatePersistentCache(
       const base::FilePath& path,
       net::URLRequestContext* request_context,
       base::WeakPtr<storage::BlobStorageContext> blob_context);
 
   virtual ~ServiceWorkerCache();
 
@@ skipping 14 matching lines @@
   void Put(ServiceWorkerFetchRequest* request,
            ServiceWorkerResponse* response,
            const ErrorCallback& callback);
 
   // Returns ErrorNotFound if not found. Otherwise deletes and returns
   // ErrorTypeOK. The callback will always be called. |request| must remain
   // valid until the callback is called.
   void Delete(ServiceWorkerFetchRequest* request,
               const ErrorCallback& callback);
 
+  // TODO(jkarlin): Have keys take an optional ServiceWorkerFetchRequest.
+  // Returns ErrorTypeOK and a vector of requests if there are no errors. The
+  // callback will always be called.
+  void Keys(const RequestsCallback& callback);
+
   // Call to determine if CreateBackend must be called.
   bool HasCreatedBackend() const;
 
   void set_backend(scoped_ptr<disk_cache::Backend> backend) {
     backend_ = backend.Pass();
   }
 
   base::WeakPtr<ServiceWorkerCache> AsWeakPtr();
 
  private:
+  struct KeysContext;
+  typedef std::vector<disk_cache::Entry*> Entries;
+
   ServiceWorkerCache(const base::FilePath& path,
                      net::URLRequestContext* request_context,
                      base::WeakPtr<storage::BlobStorageContext> blob_context);
 
+  // Static callbacks for the Keys function.
+  static void KeysDidOpenNextEntry(scoped_ptr<KeysContext> keys_context,
+                                   int rv);
+  static void KeysProcessNextEntry(scoped_ptr<KeysContext> keys_context,
+                                   const Entries::iterator& iter);
+  static void KeysDidReadHeaders(
+      scoped_ptr<KeysContext> keys_context,
+      const Entries::iterator& iter,
+      scoped_ptr<ServiceWorkerRequestResponseHeaders> headers);
+
   scoped_ptr<disk_cache::Backend> backend_;
   base::FilePath path_;
   net::URLRequestContext* request_context_;
   base::WeakPtr<storage::BlobStorageContext> blob_storage_context_;
 
   base::WeakPtrFactory<ServiceWorkerCache> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerCache);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_CACHE_H_