DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Implementation

Mercurial (a81015259a98)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144
//* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-/
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Url Classifier code
 *
 * The Initial Developer of the Original Code is
 * Google Inc.
 * Portions created by the Initial Developer are Copyright (C) 2006
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Tony Chang <tony@ponderer.org> (original author)
 *   Brett Wilson <brettw@gmail.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef nsUrlClassifierDBService_h_
#define nsUrlClassifierDBService_h_

#include <nsISupportsUtils.h>

#include "nsID.h"
#include "nsInterfaceHashtable.h"
#include "nsIObserver.h"
#include "nsUrlClassifierPrefixSet.h"
#include "nsIUrlClassifierHashCompleter.h"
#include "nsIUrlClassifierDBService.h"
#include "nsIURIClassifier.h"
#include "nsToolkitCompsCID.h"
#include "nsICryptoHash.h"
#include "nsICryptoHMAC.h"

// The hash length for a domain key.
#define DOMAIN_LENGTH 4

// The hash length of a partial hash entry.
#define PARTIAL_LENGTH 4

// The hash length of a complete hash entry.
#define COMPLETE_LENGTH 32

class nsUrlClassifierDBServiceWorker;
class nsIThread;

// This is a proxy class that just creates a background thread and delagates
// calls to the background thread.
class nsUrlClassifierDBService : public nsIUrlClassifierDBService,
                                 public nsIURIClassifier,
                                 public nsIObserver
{
public:
  // This is thread safe. It throws an exception if the thread is busy.
  nsUrlClassifierDBService();

  nsresult Init();

  static nsUrlClassifierDBService* GetInstance(nsresult *result);

  NS_DECLARE_STATIC_IID_ACCESSOR(NS_URLCLASSIFIERDBSERVICE_CID)

  NS_DECL_ISUPPORTS
  NS_DECL_NSIURLCLASSIFIERDBSERVICE
  NS_DECL_NSIURICLASSIFIER
  NS_DECL_NSIOBSERVER

  bool GetCompleter(const nsACString& tableName,
                      nsIUrlClassifierHashCompleter** completer);
  nsresult CacheCompletions(nsTArray<nsUrlClassifierLookupResult> *results);

  static nsIThread* BackgroundThread();

private:
  // No subclassing
  ~nsUrlClassifierDBService();

  // Disallow copy constructor
  nsUrlClassifierDBService(nsUrlClassifierDBService&);

  nsresult LookupURI(nsIURI* uri, nsIUrlClassifierCallback* c,
                     bool forceCheck, bool *didCheck);

  // Close db connection and join the background thread if it exists.
  nsresult Shutdown();

  // Check if the key is on a known-clean host.
  nsresult CheckClean(const nsACString &lookupKey,
                      bool *clean);

  nsCOMPtr<nsUrlClassifierDBServiceWorker> mWorker;
  nsCOMPtr<nsIUrlClassifierDBServiceWorker> mWorkerProxy;

  nsInterfaceHashtable<nsCStringHashKey, nsIUrlClassifierHashCompleter> mCompleters;

  // TRUE if the nsURIClassifier implementation should check for malware
  // uris on document loads.
  bool mCheckMalware;

  // TRUE if the nsURIClassifier implementation should check for phishing
  // uris on document loads.
  bool mCheckPhishing;

  // TRUE if a BeginUpdate() has been called without an accompanying
  // CancelUpdate()/FinishUpdate().  This is used to prevent competing
  // updates, not to determine whether an update is still being
  // processed.
  bool mInUpdate;

  // The list of tables that can use the default hash completer object.
  nsTArray<nsCString> mGethashWhitelist;

  // Set of prefixes known to be in the database
  nsRefPtr<nsUrlClassifierPrefixSet> mPrefixSet;
  nsCOMPtr<nsICryptoHash> mHash;

  // Thread that we do the updates on.
  static nsIThread* gDbBackgroundThread;
};

NS_DEFINE_STATIC_IID_ACCESSOR(nsUrlClassifierDBService, NS_URLCLASSIFIERDBSERVICE_CID)

#endif // nsUrlClassifierDBService_h_