netwerk/cache/nsDiskCacheEntry.cpp

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
   2  *
   3  * This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "nsDiskCache.h"
   8 #include "nsDiskCacheEntry.h"
   9 #include "nsDiskCacheBinding.h"
  10 #include "nsCRT.h"
  11
  12 #include "nsCache.h"
  13
  14 #include "nsISerializable.h"
  15 #include "nsSerializationHelper.h"
  16
  17 /******************************************************************************
  18  *  nsDiskCacheEntry
  19  *****************************************************************************/
  20
  21 /**
  22  *  CreateCacheEntry()
  23  *
  24  *  Creates an nsCacheEntry and sets all fields except for the binding.
  25  */
  26 nsCacheEntry *
  27 nsDiskCacheEntry::CreateCacheEntry(nsCacheDevice *  device)
  28 {
  29     nsCacheEntry * entry = nullptr;
  30     nsresult       rv = nsCacheEntry::Create(Key(),
  31                                              nsICache::STREAM_BASED,
  32                                              nsICache::STORE_ON_DISK,
  33                                              device,
  34                                              &entry);
  35     if (NS_FAILED(rv) || !entry) return nullptr;
  36
  37     entry->SetFetchCount(mFetchCount);
  38     entry->SetLastFetched(mLastFetched);
  39     entry->SetLastModified(mLastModified);
  40     entry->SetExpirationTime(mExpirationTime);
  41     entry->SetCacheDevice(device);
  42     // XXX why does nsCacheService have to fill out device in BindEntry()?
  43     entry->SetDataSize(mDataSize);
  44
  45     rv = entry->UnflattenMetaData(MetaData(), mMetaDataSize);
  46     if (NS_FAILED(rv)) {
  47         delete entry;
  48         return nullptr;
  49     }
  50
  51     // Restore security info, if present
  52     const char* info = entry->GetMetaDataElement("security-info");
  53     if (info) {
  54         nsCOMPtr<nsISupports> infoObj;
  55         rv = NS_DeserializeObject(nsDependentCString(info),
  56                                   getter_AddRefs(infoObj));
  57         if (NS_FAILED(rv)) {
  58             delete entry;
  59             return nullptr;
  60         }
  61         entry->SetSecurityInfo(infoObj);
  62     }
  63
  64     return entry;
  65 }
  66
  67
  68 /******************************************************************************
  69  *  nsDiskCacheEntryInfo
  70  *****************************************************************************/
  71
  72 NS_IMPL_ISUPPORTS1(nsDiskCacheEntryInfo, nsICacheEntryInfo)
  73
  74 NS_IMETHODIMP nsDiskCacheEntryInfo::GetClientID(char ** clientID)
  75 {
  76     NS_ENSURE_ARG_POINTER(clientID);
  77     return ClientIDFromCacheKey(nsDependentCString(mDiskEntry->Key()), clientID);
  78 }
  79
  80 extern const char DISK_CACHE_DEVICE_ID[];
  81 NS_IMETHODIMP nsDiskCacheEntryInfo::GetDeviceID(char ** deviceID)
  82 {
  83     NS_ENSURE_ARG_POINTER(deviceID);
  84     *deviceID = NS_strdup(mDeviceID);
  85     return *deviceID ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
  86 }
  87
  88
  89 NS_IMETHODIMP nsDiskCacheEntryInfo::GetKey(nsACString &clientKey)
  90 {
  91     return ClientKeyFromCacheKey(nsDependentCString(mDiskEntry->Key()), clientKey);
  92 }
  93
  94 NS_IMETHODIMP nsDiskCacheEntryInfo::GetFetchCount(PRInt32 *aFetchCount)
  95 {
  96     NS_ENSURE_ARG_POINTER(aFetchCount);
  97     *aFetchCount = mDiskEntry->mFetchCount;
  98     return NS_OK;
  99 }
 100
 101 NS_IMETHODIMP nsDiskCacheEntryInfo::GetLastFetched(PRUint32 *aLastFetched)
 102 {
 103     NS_ENSURE_ARG_POINTER(aLastFetched);
 104     *aLastFetched = mDiskEntry->mLastFetched;
 105     return NS_OK;
 106 }
 107
 108 NS_IMETHODIMP nsDiskCacheEntryInfo::GetLastModified(PRUint32 *aLastModified)
 109 {
 110     NS_ENSURE_ARG_POINTER(aLastModified);
 111     *aLastModified = mDiskEntry->mLastModified;
 112     return NS_OK;
 113 }
 114
 115 NS_IMETHODIMP nsDiskCacheEntryInfo::GetExpirationTime(PRUint32 *aExpirationTime)
 116 {
 117     NS_ENSURE_ARG_POINTER(aExpirationTime);
 118     *aExpirationTime = mDiskEntry->mExpirationTime;
 119     return NS_OK;
 120 }
 121
 122 NS_IMETHODIMP nsDiskCacheEntryInfo::IsStreamBased(bool *aStreamBased)
 123 {
 124     NS_ENSURE_ARG_POINTER(aStreamBased);
 125     *aStreamBased = true;
 126     return NS_OK;
 127 }
 128
 129 NS_IMETHODIMP nsDiskCacheEntryInfo::GetDataSize(PRUint32 *aDataSize)
 130 {
 131     NS_ENSURE_ARG_POINTER(aDataSize);
 132     *aDataSize = mDiskEntry->mDataSize;
 133     return NS_OK;
 134 }