Remove //net (except for Android test stuff) and sdch

net/http/http_cache.h

Index: net/http/http_cache.h
diff --git a/net/http/http_cache.h b/net/http/http_cache.h
deleted file mode 100644
index 4f75ac50f5ea0f78efee9a0cf3427a75b4ac1a11..0000000000000000000000000000000000000000
--- a/net/http/http_cache.h
+++ /dev/null
@@ -1,486 +0,0 @@
-// Copyright (c) 2012 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.
-
-// This file declares a HttpTransactionFactory implementation that can be
-// layered on top of another HttpTransactionFactory to add HTTP caching.  The
-// caching logic follows RFC 2616 (any exceptions are called out in the code).
-//
-// The HttpCache takes a disk_cache::Backend as a parameter, and uses that for
-// the cache storage.
-//
-// See HttpTransactionFactory and HttpTransaction for more details.
-
-#ifndef NET_HTTP_HTTP_CACHE_H_
-#define NET_HTTP_HTTP_CACHE_H_
-
-#include <list>
-#include <map>
-#include <set>
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/containers/hash_tables.h"
-#include "base/files/file_path.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "base/threading/non_thread_safe.h"
-#include "base/time/clock.h"
-#include "base/time/time.h"
-#include "net/base/cache_type.h"
-#include "net/base/completion_callback.h"
-#include "net/base/load_states.h"
-#include "net/base/net_export.h"
-#include "net/base/request_priority.h"
-#include "net/http/http_network_session.h"
-#include "net/http/http_transaction_factory.h"
-
-class GURL;
-
-namespace base {
-class SingleThreadTaskRunner;
-}  // namespace base
-
-namespace disk_cache {
-class Backend;
-class Entry;
-}  // namespace disk_cache
-
-namespace net {
-
-class CertVerifier;
-class ChannelIDService;
-class DiskBasedCertCache;
-class HostResolver;
-class HttpAuthHandlerFactory;
-class HttpNetworkSession;
-class HttpResponseInfo;
-class HttpServerProperties;
-class IOBuffer;
-class NetLog;
-class NetworkDelegate;
-class ProxyService;
-class SSLConfigService;
-class TransportSecurityState;
-class ViewCacheHelper;
-struct HttpRequestInfo;
-
-class NET_EXPORT HttpCache : public HttpTransactionFactory,
-                             NON_EXPORTED_BASE(public base::NonThreadSafe) {
- public:
-  // The cache mode of operation.
-  enum Mode {
-    // Normal mode just behaves like a standard web cache.
-    NORMAL = 0,
-    // Record mode caches everything for purposes of offline playback.
-    RECORD,
-    // Playback mode replays from a cache without considering any
-    // standard invalidations.
-    PLAYBACK,
-    // Disables reads and writes from the cache.
-    // Equivalent to setting LOAD_DISABLE_CACHE on every request.
-    DISABLE
-  };
-
-  // A BackendFactory creates a backend object to be used by the HttpCache.
-  class NET_EXPORT BackendFactory {
-   public:
-    virtual ~BackendFactory() {}
-
-    // The actual method to build the backend. Returns a net error code. If
-    // ERR_IO_PENDING is returned, the |callback| will be notified when the
-    // operation completes, and |backend| must remain valid until the
-    // notification arrives.
-    // The implementation must not access the factory object after invoking the
-    // |callback| because the object can be deleted from within the callback.
-    virtual int CreateBackend(NetLog* net_log,
-                              scoped_ptr<disk_cache::Backend>* backend,
-                              const CompletionCallback& callback) = 0;
-  };
-
-  // A default backend factory for the common use cases.
-  class NET_EXPORT DefaultBackend : public BackendFactory {
-   public:
-    // |path| is the destination for any files used by the backend, and
-    // |thread| is the thread where disk operations should take place. If
-    // |max_bytes| is  zero, a default value will be calculated automatically.
-    DefaultBackend(CacheType type,
-                   BackendType backend_type,
-                   const base::FilePath& path,
-                   int max_bytes,
-                   const scoped_refptr<base::SingleThreadTaskRunner>& thread);
-    ~DefaultBackend() override;
-
-    // Returns a factory for an in-memory cache.
-    static BackendFactory* InMemory(int max_bytes);
-
-    // BackendFactory implementation.
-    int CreateBackend(NetLog* net_log,
-                      scoped_ptr<disk_cache::Backend>* backend,
-                      const CompletionCallback& callback) override;
-
-   private:
-    CacheType type_;
-    BackendType backend_type_;
-    const base::FilePath path_;
-    int max_bytes_;
-    scoped_refptr<base::SingleThreadTaskRunner> thread_;
-  };
-
-  // The number of minutes after a resource is prefetched that it can be used
-  // again without validation.
-  static const int kPrefetchReuseMins = 5;
-
-  // The disk cache is initialized lazily (by CreateTransaction) in this case.
-  // The HttpCache takes ownership of the |backend_factory|.
-  HttpCache(const net::HttpNetworkSession::Params& params,
-            BackendFactory* backend_factory);
-
-  // The disk cache is initialized lazily (by CreateTransaction) in this case.
-  // Provide an existing HttpNetworkSession, the cache can construct a
-  // network layer with a shared HttpNetworkSession in order for multiple
-  // network layers to share information (e.g. authentication data). The
-  // HttpCache takes ownership of the |backend_factory|.
-  HttpCache(HttpNetworkSession* session, BackendFactory* backend_factory);
-
-  // Initialize the cache from its component parts. The lifetime of the
-  // |network_layer| and |backend_factory| are managed by the HttpCache and
-  // will be destroyed using |delete| when the HttpCache is destroyed.
-  HttpCache(HttpTransactionFactory* network_layer,
-            NetLog* net_log,
-            BackendFactory* backend_factory);
-
-  ~HttpCache() override;
-
-  HttpTransactionFactory* network_layer() { return network_layer_.get(); }
-
-  DiskBasedCertCache* cert_cache() const { return cert_cache_.get(); }
-
-  // Retrieves the cache backend for this HttpCache instance. If the backend
-  // is not initialized yet, this method will initialize it. The return value is
-  // a network error code, and it could be ERR_IO_PENDING, in which case the
-  // |callback| will be notified when the operation completes. The pointer that
-  // receives the |backend| must remain valid until the operation completes.
-  int GetBackend(disk_cache::Backend** backend,
-                 const net::CompletionCallback& callback);
-
-  // Returns the current backend (can be NULL).
-  disk_cache::Backend* GetCurrentBackend() const;
-
-  // Given a header data blob, convert it to a response info object.
-  static bool ParseResponseInfo(const char* data, int len,
-                                HttpResponseInfo* response_info,
-                                bool* response_truncated);
-
-  // Writes |buf_len| bytes of metadata stored in |buf| to the cache entry
-  // referenced by |url|, as long as the entry's |expected_response_time| has
-  // not changed. This method returns without blocking, and the operation will
-  // be performed asynchronously without any completion notification.
-  void WriteMetadata(const GURL& url,
-                     RequestPriority priority,
-                     double expected_response_time,
-                     IOBuffer* buf,
-                     int buf_len);
-
-  // Get/Set the cache's mode.
-  void set_mode(Mode value) { mode_ = value; }
-  Mode mode() { return mode_; }
-
-  // Get/Set the cache's clock. These are public only for testing.
-  void SetClockForTesting(scoped_ptr<base::Clock> clock) {
-    clock_.reset(clock.release());
-  }
-  base::Clock* clock() const { return clock_.get(); }
-
-  // Close currently active sockets so that fresh page loads will not use any
-  // recycled connections.  For sockets currently in use, they may not close
-  // immediately, but they will not be reusable. This is for debugging.
-  void CloseAllConnections();
-
-  // Close all idle connections. Will close all sockets not in active use.
-  void CloseIdleConnections();
-
-  // Called whenever an external cache in the system reuses the resource
-  // referred to by |url| and |http_method|.
-  void OnExternalCacheHit(const GURL& url, const std::string& http_method);
-
-  // Initializes the Infinite Cache, if selected by the field trial.
-  void InitializeInfiniteCache(const base::FilePath& path);
-
-  // Causes all transactions created after this point to effectively bypass
-  // the cache lock whenever there is lock contention.
-  void BypassLockForTest() {
-    bypass_lock_for_test_ = true;
-  }
-
-  // Causes all transactions created after this point to generate a failure
-  // when attempting to conditionalize a network request.
-  void FailConditionalizationForTest() {
-    fail_conditionalization_for_test_ = true;
-  }
-
-  bool use_stale_while_revalidate() const {
-    return use_stale_while_revalidate_;
-  }
-
-  // Enable stale_while_revalidate functionality for testing purposes.
-  void set_use_stale_while_revalidate_for_testing(
-      bool use_stale_while_revalidate) {
-    use_stale_while_revalidate_ = use_stale_while_revalidate;
-  }
-
-  // HttpTransactionFactory implementation:
-  int CreateTransaction(RequestPriority priority,
-                        scoped_ptr<HttpTransaction>* trans) override;
-  HttpCache* GetCache() override;
-  HttpNetworkSession* GetSession() override;
-
-  base::WeakPtr<HttpCache> GetWeakPtr() { return weak_factory_.GetWeakPtr(); }
-
-  // Resets the network layer to allow for tests that probe
-  // network changes (e.g. host unreachable).  The old network layer is
-  // returned to allow for filter patterns that only intercept
-  // some creation requests.  Note ownership exchange.
-  scoped_ptr<HttpTransactionFactory>
-      SetHttpNetworkTransactionFactoryForTesting(
-          scoped_ptr<HttpTransactionFactory> new_network_layer);
-
- private:
-  // Types --------------------------------------------------------------------
-
-  // Disk cache entry data indices.
-  enum {
-    kResponseInfoIndex = 0,
-    kResponseContentIndex,
-    kMetadataIndex,
-
-    // Must remain at the end of the enum.
-    kNumCacheEntryDataIndices
-  };
-
-  class MetadataWriter;
-  class QuicServerInfoFactoryAdaptor;
-  class Transaction;
-  class WorkItem;
-  friend class Transaction;
-  friend class ViewCacheHelper;
-  struct PendingOp;  // Info for an entry under construction.
-  class AsyncValidation;  // Encapsulates a single async revalidation.
-
-  typedef std::list<Transaction*> TransactionList;
-  typedef std::list<WorkItem*> WorkItemList;
-  typedef std::map<std::string, AsyncValidation*> AsyncValidationMap;
-
-  struct ActiveEntry {
-    explicit ActiveEntry(disk_cache::Entry* entry);
-    ~ActiveEntry();
-
-    disk_cache::Entry* disk_entry;
-    Transaction*       writer;
-    TransactionList    readers;
-    TransactionList    pending_queue;
-    bool               will_process_pending_queue;
-    bool               doomed;
-  };
-
-  typedef base::hash_map<std::string, ActiveEntry*> ActiveEntriesMap;
-  typedef base::hash_map<std::string, PendingOp*> PendingOpsMap;
-  typedef std::set<ActiveEntry*> ActiveEntriesSet;
-  typedef base::hash_map<std::string, int> PlaybackCacheMap;
-
-  // Methods ------------------------------------------------------------------
-
-  // Creates the |backend| object and notifies the |callback| when the operation
-  // completes. Returns an error code.
-  int CreateBackend(disk_cache::Backend** backend,
-                    const net::CompletionCallback& callback);
-
-  // Makes sure that the backend creation is complete before allowing the
-  // provided transaction to use the object. Returns an error code.  |trans|
-  // will be notified via its IO callback if this method returns ERR_IO_PENDING.
-  // The transaction is free to use the backend directly at any time after
-  // receiving the notification.
-  int GetBackendForTransaction(Transaction* trans);
-
-  // Generates the cache key for this request.
-  std::string GenerateCacheKey(const HttpRequestInfo*);
-
-  // Dooms the entry selected by |key|, if it is currently in the list of active
-  // entries.
-  void DoomActiveEntry(const std::string& key);
-
-  // Dooms the entry selected by |key|. |trans| will be notified via its IO
-  // callback if this method returns ERR_IO_PENDING. The entry can be
-  // currently in use or not.
-  int DoomEntry(const std::string& key, Transaction* trans);
-
-  // Dooms the entry selected by |key|. |trans| will be notified via its IO
-  // callback if this method returns ERR_IO_PENDING. The entry should not
-  // be currently in use.
-  int AsyncDoomEntry(const std::string& key, Transaction* trans);
-
-  // Dooms the entry associated with a GET for a given |url|.
-  void DoomMainEntryForUrl(const GURL& url);
-
-  // Closes a previously doomed entry.
-  void FinalizeDoomedEntry(ActiveEntry* entry);
-
-  // Returns an entry that is currently in use and not doomed, or NULL.
-  ActiveEntry* FindActiveEntry(const std::string& key);
-
-  // Creates a new ActiveEntry and starts tracking it. |disk_entry| is the disk
-  // cache entry.
-  ActiveEntry* ActivateEntry(disk_cache::Entry* disk_entry);
-
-  // Deletes an ActiveEntry.
-  void DeactivateEntry(ActiveEntry* entry);
-
-  // Deletes an ActiveEntry using an exhaustive search.
-  void SlowDeactivateEntry(ActiveEntry* entry);
-
-  // Returns the PendingOp for the desired |key|. If an entry is not under
-  // construction already, a new PendingOp structure is created.
-  PendingOp* GetPendingOp(const std::string& key);
-
-  // Deletes a PendingOp.
-  void DeletePendingOp(PendingOp* pending_op);
-
-  // Opens the disk cache entry associated with |key|, returning an ActiveEntry
-  // in |*entry|. |trans| will be notified via its IO callback if this method
-  // returns ERR_IO_PENDING.
-  int OpenEntry(const std::string& key, ActiveEntry** entry,
-                Transaction* trans);
-
-  // Creates the disk cache entry associated with |key|, returning an
-  // ActiveEntry in |*entry|. |trans| will be notified via its IO callback if
-  // this method returns ERR_IO_PENDING.
-  int CreateEntry(const std::string& key, ActiveEntry** entry,
-                  Transaction* trans);
-
-  // Destroys an ActiveEntry (active or doomed).
-  void DestroyEntry(ActiveEntry* entry);
-
-  // Adds a transaction to an ActiveEntry. If this method returns ERR_IO_PENDING
-  // the transaction will be notified about completion via its IO callback. This
-  // method returns ERR_CACHE_RACE to signal the transaction that it cannot be
-  // added to the provided entry, and it should retry the process with another
-  // one (in this case, the entry is no longer valid).
-  int AddTransactionToEntry(ActiveEntry* entry, Transaction* trans);
-
-  // Called when the transaction has finished working with this entry. |cancel|
-  // is true if the operation was cancelled by the caller instead of running
-  // to completion.
-  void DoneWithEntry(ActiveEntry* entry, Transaction* trans, bool cancel);
-
-  // Called when the transaction has finished writing to this entry. |success|
-  // is false if the cache entry should be deleted.
-  void DoneWritingToEntry(ActiveEntry* entry, bool success);
-
-  // Called when the transaction has finished reading from this entry.
-  void DoneReadingFromEntry(ActiveEntry* entry, Transaction* trans);
-
-  // Converts the active writer transaction to a reader so that other
-  // transactions can start reading from this entry.
-  void ConvertWriterToReader(ActiveEntry* entry);
-
-  // Returns the LoadState of the provided pending transaction.
-  LoadState GetLoadStateForPendingTransaction(const Transaction* trans);
-
-  // Removes the transaction |trans|, from the pending list of an entry
-  // (PendingOp, active or doomed entry).
-  void RemovePendingTransaction(Transaction* trans);
-
-  // Removes the transaction |trans|, from the pending list of |entry|.
-  bool RemovePendingTransactionFromEntry(ActiveEntry* entry,
-                                         Transaction* trans);
-
-  // Removes the transaction |trans|, from the pending list of |pending_op|.
-  bool RemovePendingTransactionFromPendingOp(PendingOp* pending_op,
-                                             Transaction* trans);
-
-  // Instantiates and sets QUIC server info factory.
-  void SetupQuicServerInfoFactory(HttpNetworkSession* session);
-
-  // Resumes processing the pending list of |entry|.
-  void ProcessPendingQueue(ActiveEntry* entry);
-
-  // Called by Transaction to perform an asynchronous revalidation. Creates a
-  // new independent transaction as a copy of the original.
-  void PerformAsyncValidation(const HttpRequestInfo& original_request,
-                              const BoundNetLog& net_log);
-
-  // Remove the AsyncValidation with url |url| from the |async_validations_| set
-  // and delete it.
-  void DeleteAsyncValidation(const std::string& url);
-
-  // Events (called via PostTask) ---------------------------------------------
-
-  void OnProcessPendingQueue(ActiveEntry* entry);
-
-  // Callbacks ----------------------------------------------------------------
-
-  // Processes BackendCallback notifications.
-  void OnIOComplete(int result, PendingOp* entry);
-
-  // Helper to conditionally delete |pending_op| if the HttpCache object it
-  // is meant for has been deleted.
-  //
-  // TODO(ajwong): The PendingOp lifetime management is very tricky.  It might
-  // be possible to simplify it using either base::Owned() or base::Passed()
-  // with the callback.
-  static void OnPendingOpComplete(const base::WeakPtr<HttpCache>& cache,
-                                  PendingOp* pending_op,
-                                  int result);
-
-  // Processes the backend creation notification.
-  void OnBackendCreated(int result, PendingOp* pending_op);
-
-  // Variables ----------------------------------------------------------------
-
-  NetLog* net_log_;
-
-  // Used when lazily constructing the disk_cache_.
-  scoped_ptr<BackendFactory> backend_factory_;
-  bool building_backend_;
-  bool bypass_lock_for_test_;
-  bool fail_conditionalization_for_test_;
-
-  // true if the implementation of Cache-Control: stale-while-revalidate
-  // directive is enabled (either via command-line flag or experiment).
-  bool use_stale_while_revalidate_;
-
-  Mode mode_;
-
-  scoped_ptr<QuicServerInfoFactoryAdaptor> quic_server_info_factory_;
-
-  scoped_ptr<HttpTransactionFactory> network_layer_;
-
-  scoped_ptr<disk_cache::Backend> disk_cache_;
-
-  scoped_ptr<DiskBasedCertCache> cert_cache_;
-
-  // The set of active entries indexed by cache key.
-  ActiveEntriesMap active_entries_;
-
-  // The set of doomed entries.
-  ActiveEntriesSet doomed_entries_;
-
-  // The set of entries "under construction".
-  PendingOpsMap pending_ops_;
-
-  scoped_ptr<PlaybackCacheMap> playback_cache_map_;
-
-  // The async validations currently in progress, keyed by URL.
-  AsyncValidationMap async_validations_;
-
-  // A clock that can be swapped out for testing.
-  scoped_ptr<base::Clock> clock_;
-
-  base::WeakPtrFactory<HttpCache> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(HttpCache);
-};
-
-}  // namespace net
-
-#endif  // NET_HTTP_HTTP_CACHE_H_