sync/engine/syncer_proto_util.h

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef SYNC_ENGINE_SYNCER_PROTO_UTIL_H_
   6 #define SYNC_ENGINE_SYNCER_PROTO_UTIL_H_
   7
   8 #include <string>
   9
  10 #include "base/gtest_prod_util.h"
  11 #include "base/time/time.h"
  12 #include "sync/base/sync_export.h"
  13 #include "sync/internal_api/public/base/model_type.h"
  14 #include "sync/internal_api/public/util/syncer_error.h"
  15 #include "sync/sessions/sync_session.h"
  16
  17 namespace sync_pb {
  18 class ClientToServerMessage;
  19 class ClientToServerResponse;
  20 class ClientToServerResponse_Error;
  21 class CommitResponse_EntryResponse;
  22 class EntitySpecifics;
  23 class SyncEntity;
  24 }
  25
  26 namespace syncer {
  27
  28 class ServerConnectionManager;
  29
  30 namespace sessions {
  31 class SyncProtocolError;
  32 class SyncSessionContext;
  33 }
  34
  35 namespace syncable {
  36 class Directory;
  37 class Entry;
  38 }
  39
  40 // Returns the types to migrate from the data in |response|.
  41 SYNC_EXPORT_PRIVATE ModelTypeSet GetTypesToMigrate(
  42     const sync_pb::ClientToServerResponse& response);
  43
  44 // Builds a SyncProtocolError from the data in |error|.
  45 SYNC_EXPORT_PRIVATE SyncProtocolError ConvertErrorPBToLocalType(
  46     const sync_pb::ClientToServerResponse_Error& error);
  47
  48 class SYNC_EXPORT_PRIVATE SyncerProtoUtil {
  49  public:
  50   // Posts the given message and fills the buffer with the returned value.
  51   // Returns true on success.  Also handles store birthday verification: will
  52   // produce a SyncError if the birthday is incorrect.
  53   // NOTE: This will add all fields that must be sent on every request, which
  54   // includes store birthday, protocol version, client chips, api keys, etc.
  55   static SyncerError PostClientToServerMessage(
  56       sync_pb::ClientToServerMessage* msg,
  57       sync_pb::ClientToServerResponse* response,
  58       sessions::SyncSession* session,
  59       ModelTypeSet* partial_failure_data_types);
  60
  61   static bool ShouldMaintainPosition(const sync_pb::SyncEntity& sync_entity);
  62
  63   // Extract the name field from a sync entity.
  64   static const std::string& NameFromSyncEntity(
  65       const sync_pb::SyncEntity& entry);
  66
  67   // Extract the name field from a commit entry response.
  68   static const std::string& NameFromCommitEntryResponse(
  69       const sync_pb::CommitResponse_EntryResponse& entry);
  70
  71   // Persist the bag of chips if it is present in the response.
  72   static void PersistBagOfChips(
  73       syncable::Directory* dir,
  74       const sync_pb::ClientToServerResponse& response);
  75
  76   // EntitySpecifics is used as a filter for the GetUpdates message to tell
  77   // the server which datatypes to send back.  This adds a datatype so that
  78   // it's included in the filter.
  79   static void AddToEntitySpecificDatatypesFilter(ModelType datatype,
  80       sync_pb::EntitySpecifics* filter);
  81
  82   // Get a debug string representation of the client to server response.
  83   static std::string ClientToServerResponseDebugString(
  84       const sync_pb::ClientToServerResponse& response);
  85
  86   // Get update contents as a string. Intended for logging, and intended
  87   // to have a smaller footprint than the protobuf's built-in pretty printer.
  88   static std::string SyncEntityDebugString(const sync_pb::SyncEntity& entry);
  89
  90   // Pull the birthday from the dir and put it into the msg.
  91   static void AddRequestBirthday(syncable::Directory* dir,
  92                                  sync_pb::ClientToServerMessage* msg);
  93
  94   // Pull the bag of chips from the dir and put it into the msg.
  95   static void AddBagOfChips(syncable::Directory* dir,
  96                             sync_pb::ClientToServerMessage* msg);
  97
  98
  99   // Set the protocol version field in the outgoing message.
 100   static void SetProtocolVersion(sync_pb::ClientToServerMessage* msg);
 101
 102  private:
 103   SyncerProtoUtil() {}
 104
 105   // Helper functions for PostClientToServerMessage.
 106
 107   // Verifies the store birthday, alerting/resetting as appropriate if there's a
 108   // mismatch. Return false if the syncer should be stuck.
 109   static bool VerifyResponseBirthday(
 110       const sync_pb::ClientToServerResponse& response,
 111       syncable::Directory* dir);
 112
 113   // Returns true if sync is disabled by admin for a dasher account.
 114   static bool IsSyncDisabledByAdmin(
 115       const sync_pb::ClientToServerResponse& response);
 116
 117   // Post the message using the scm, and do some processing on the returned
 118   // headers. Decode the server response.
 119   static bool PostAndProcessHeaders(ServerConnectionManager* scm,
 120                                     sessions::SyncSession* session,
 121                                     const sync_pb::ClientToServerMessage& msg,
 122                                     sync_pb::ClientToServerResponse* response);
 123
 124   static base::TimeDelta GetThrottleDelay(
 125       const sync_pb::ClientToServerResponse& response);
 126
 127   friend class SyncerProtoUtilTest;
 128   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, AddRequestBirthday);
 129   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, PostAndProcessHeaders);
 130   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, VerifyDisabledByAdmin);
 131   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, VerifyResponseBirthday);
 132   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, HandleThrottlingNoDatatypes);
 133   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, HandleThrottlingWithDatatypes);
 134
 135   DISALLOW_COPY_AND_ASSIGN(SyncerProtoUtil);
 136 };
 137
 138 }  // namespace syncer
 139
 140 #endif  // SYNC_ENGINE_SYNCER_PROTO_UTIL_H_