C++ nsACString::Data方法代码示例

nsCString
PendingLookup::EscapeFingerprint(const nsACString& aFingerprint)
{
  // Google's fingerprint doesn't have colons
  nsCString escaped;
  escaped.SetCapacity(aFingerprint.Length());
  for (unsigned int i = 0; i < aFingerprint.Length(); ++i) {
    if (aFingerprint.Data()[i] != ':') {
      escaped.Append(aFingerprint.Data()[i]);
    }
  }
  return escaped;
}

bool AndroidDecoderModule::SupportsMimeType(const nsACString& aMimeType) {
  if (jni::GetAPIVersion() < 16) {
    return false;
  }

  if (aMimeType.EqualsLiteral("video/mp4") ||
      aMimeType.EqualsLiteral("video/avc")) {
    return true;
  }

  // When checking "audio/x-wav", CreateDecoder can cause a JNI ERROR by
  // Accessing a stale local reference leading to a SIGSEGV crash.
  // To avoid this we check for wav types here.
  if (aMimeType.EqualsLiteral("audio/x-wav") ||
      aMimeType.EqualsLiteral("audio/wave; codecs=1") ||
      aMimeType.EqualsLiteral("audio/wave; codecs=6") ||
      aMimeType.EqualsLiteral("audio/wave; codecs=7") ||
      aMimeType.EqualsLiteral("audio/wave; codecs=65534")) {
    return false;
  }

  if ((VPXDecoder::IsVPX(aMimeType, VPXDecoder::VP8) &&
       !GetFeatureStatus(nsIGfxInfo::FEATURE_VP8_HW_DECODE)) ||
      (VPXDecoder::IsVPX(aMimeType, VPXDecoder::VP9) &&
       !GetFeatureStatus(nsIGfxInfo::FEATURE_VP9_HW_DECODE))) {
    return false;
  }

  // Prefer the gecko decoder for opus and vorbis; stagefright crashes
  // on content demuxed from mp4.
  // Not all android devices support FLAC even when they say they do.
  if (OpusDataDecoder::IsOpus(aMimeType) ||
      VorbisDataDecoder::IsVorbis(aMimeType) ||
      aMimeType.EqualsLiteral("audio/flac")) {
    SLOG("Rejecting audio of type %s", aMimeType.Data());
    return false;
  }

  // Prefer the gecko decoder for Theora.
  // Not all android devices support Theora even when they say they do.
  if (TheoraDecoder::IsTheora(aMimeType)) {
    SLOG("Rejecting video of type %s", aMimeType.Data());
    return false;
  }

  return java::HardwareCodecCapabilityUtils::FindDecoderCodecInfoForMimeType(
      TranslateMimeType(aMimeType));
}

static bool
StartsWith(const nsACString& string, const char (&prefix)[N])
{
    if (N - 1 > string.Length()) {
      return false;
    }
    return memcmp(string.Data(), prefix, N - 1) == 0;
}

void
nsSOCKSSocketInfo::WriteString(const nsACString &str)
{
    NS_ABORT_IF_FALSE(mDataLength + str.Length() <= BUFFER_SIZE,
                      "Can't write that much data!");
    memcpy(mData + mDataLength, str.Data(), str.Length());
    mDataLength += str.Length();
}

nsCString
PendingLookup::EscapeCertificateAttribute(const nsACString& aAttribute)
{
  // Escape '/' because it's a field separator, and '%' because Chrome does
  nsCString escaped;
  escaped.SetCapacity(aAttribute.Length());
  for (unsigned int i = 0; i < aAttribute.Length(); ++i) {
    if (aAttribute.Data()[i] == '%') {
      escaped.AppendLiteral("%25");
    } else if (aAttribute.Data()[i] == '/') {
      escaped.AppendLiteral("%2F");
    } else if (aAttribute.Data()[i] == ' ') {
      escaped.AppendLiteral("%20");
    } else {
      escaped.Append(aAttribute.Data()[i]);
    }
  }
  return escaped;
}

ProbeManager::ProbeManager(const nsCID &aApplicationUID,
                           const nsACString &aApplicationName)
  : mApplicationUID(aApplicationUID)
  , mApplicationName(aApplicationName)
  , mSessionHandle(0)
  , mRegistrationHandle(0)
{
#if defined(MOZ_LOGGING)
  char cidStr[NSID_LENGTH];
  aApplicationUID.ToProvidedString(cidStr);
  LOG(("ProbeManager::Init for application %s, %s",
       aApplicationName.Data(), cidStr));
#endif
}

nsresult
PendingDBLookup::LookupSpec(const nsACString& aSpec,
                            bool aAllowlistOnly)
{
  LOG(("Checking principal %s [this=%p]", aSpec.Data(), this));
  mSpec = aSpec;
  mAllowlistOnly = aAllowlistOnly;
  nsresult rv = LookupSpecInternal(aSpec);
  if (NS_FAILED(rv)) {
    LOG(("Error in LookupSpecInternal"));
    return mPendingLookup->OnComplete(false, NS_OK);
  }
  // LookupSpecInternal has called nsIUrlClassifierCallback.lookup, which is
  // guaranteed to call HandleEvent.
  return rv;
}

void
GeckoMediaPluginServiceParent::ForgetThisSiteOnGMPThread(const nsACString& aSite)
{
  MOZ_ASSERT(NS_GetCurrentThread() == mGMPThread);
  LOGD(("%s::%s: origin=%s", __CLASS__, __FUNCTION__, aSite.Data()));

  struct OriginFilter : public DirectoryFilter {
    explicit OriginFilter(const nsACString& aSite) : mSite(aSite) {}
    virtual bool operator()(nsIFile* aPath) {
      return MatchOrigin(aPath, mSite);
    }
  private:
    const nsACString& mSite;
  } filter(aSite);

  ClearNodeIdAndPlugin(filter);
}

/**
 * Determines whether or not a string exists as the root element in an XML data
 * string buffer.
 * @param   dataString
 *          The data being sniffed
 * @param   substring
 *          The substring being tested for existence and root-ness.
 * @returns true if the substring exists and is the documentElement, false
 *          otherwise.
 */
static bool
ContainsTopLevelSubstring(nsACString& dataString, const char *substring) 
{
  nsACString::const_iterator start, end;
  dataString.BeginReading(start);
  dataString.EndReading(end);

  if (!FindInReadable(nsCString(substring), start, end)){
    return false;
  }

  auto offset = start.get() - dataString.Data();

  const char *begin = dataString.BeginReading();

  // Only do the validation when we find the substring.
  return IsDocumentElement(begin, begin + offset);
}

static nsresult
WriteDataToFile(nsIFile* aFile, const nsACString& data)
{
  nsCOMPtr<nsILocalFile> localFile = do_QueryInterface(aFile);
  NS_ENSURE_TRUE(localFile, NS_ERROR_FAILURE);

  PRFileDesc* fd;
  nsresult rv = localFile->OpenNSPRFileDesc(PR_WRONLY | PR_CREATE_FILE, 00600,
                                            &fd);
  NS_ENSURE_SUCCESS(rv, rv);

  rv = NS_OK;
  if (PR_Write(fd, data.Data(), data.Length()) == -1) {
    rv = NS_ERROR_FAILURE;
  }
  PR_Close(fd);
  return rv;
}

/* static */ bool
PureOmxPlatformLayer::FindStandardComponent(const nsACString& aMimeType,
                                            nsACString* aComponentName)
{
  nsAutoCString role;
  if (!GetStandardComponentRole(aMimeType, role))
    return false;

  OMX_U32 nComponents = 0;
  OMX_ERRORTYPE err;
  err = OMX_GetComponentsOfRole(const_cast<OMX_STRING>(role.Data()),
                                &nComponents, nullptr);
  if (err != OMX_ErrorNone || nComponents <= 0) {
    return false;
  }
  if (!aComponentName) {
    return true;
  }

  // TODO:
  // Only the first component will be used.
  // We should detect the most preferred component.
  OMX_U8* componentNames[1];
  UniquePtr<OMX_U8[]> componentName;
  componentName = MakeUniqueFallible<OMX_U8[]>(OMX_MAX_STRINGNAME_SIZE);
  componentNames[0] = componentName.get();
  nComponents = 1;
  err = OMX_GetComponentsOfRole(const_cast<OMX_STRING>(role.Data()),
                                &nComponents, componentNames);
  if (err == OMX_ErrorNone) {
    MOZ_LOG(sPDMLog, mozilla::LogLevel::Debug,
            ("PureOmxPlatformLayer::%s: A component has been found for %s: %s",
             __func__, aMimeType.Data(), componentNames[0]));
    aComponentName->Assign(reinterpret_cast<char*>(componentNames[0]));
  }

  return err == OMX_ErrorNone;
}

void
MediaKeys::OnCDMCreated(PromiseId aId, const nsACString& aNodeId, const nsACString& aPluginId)
{
  nsRefPtr<Promise> promise(RetrievePromise(aId));
  if (!promise) {
    return;
  }
  mNodeId = aNodeId;
  nsRefPtr<MediaKeys> keys(this);
  EME_LOG("MediaKeys[%p]::OnCDMCreated() resolve promise id=%d", this, aId);
  promise->MaybeResolve(keys);
  if (mCreatePromiseId == aId) {
    Release();
  }

  MediaKeySystemAccess::NotifyObservers(mParent,
                                        mKeySystem,
                                        MediaKeySystemStatus::Cdm_created);

  if (!aPluginId.IsEmpty()) {
    // Prepare plugin crash reporter.
    nsRefPtr<gmp::GeckoMediaPluginService> service =
      gmp::GeckoMediaPluginService::GetGeckoMediaPluginService();
    if (NS_WARN_IF(!service)) {
      return;
    }
    if (NS_WARN_IF(!mParent)) {
      return;
    }
    nsCOMPtr<nsIDocument> doc = mParent->GetExtantDoc();
    if (NS_WARN_IF(!doc)) {
      return;
    }
    service->AddPluginCrashCallback(new CrashHandler(aPluginId, mParent, doc));
    EME_LOG("MediaKeys[%p]::OnCDMCreated() registered crash handler for pluginId '%s'",
            this, aPluginId.Data());
  }
}

bool
CreateFile(const nsACString& aData)
{
  nsCOMPtr<nsIFile> file = GetFile();

  nsCOMPtr<nsIOutputStream> stream;
  nsresult rv = NS_NewLocalFileOutputStream(getter_AddRefs(stream), file);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return false;
  }

  uint32_t count;
  rv = stream->Write(aData.Data(), aData.Length(), &count);
  if (NS_WARN_IF(NS_FAILED(rv))) {
    return false;
  }

  if (count != aData.Length()) {
    return false;
  }

  return true;
}

nsresult
nsUrlClassifierStreamUpdater::FetchUpdate(nsIURI *aUpdateUrl,
                                          const nsACString & aRequestBody,
                                          const nsACString & aStreamTable)
{

#ifdef DEBUG
  {
    nsCString spec;
    aUpdateUrl->GetSpec(spec);
    LOG(("Fetching update %s from %s", aRequestBody.Data(), spec.get()));
  }
#endif

  nsresult rv;
  uint32_t loadFlags = nsIChannel::INHIBIT_CACHING |
                       nsIChannel::LOAD_BYPASS_CACHE;
  rv = NS_NewChannel(getter_AddRefs(mChannel),
                     aUpdateUrl,
                     nsContentUtils::GetSystemPrincipal(),
                     nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL,
                     nsIContentPolicy::TYPE_OTHER,
                     nullptr,  // aLoadGroup
                     this,     // aInterfaceRequestor
                     loadFlags);

  NS_ENSURE_SUCCESS(rv, rv);

  mBeganStream = false;

  // If aRequestBody is empty, construct it for the test.
  if (!aRequestBody.IsEmpty()) {
    rv = AddRequestBody(aRequestBody);
    NS_ENSURE_SUCCESS(rv, rv);
  }

  // Set the appropriate content type for file/data URIs, for unit testing
  // purposes.
  // This is only used for testing and should be deleted.
  bool match;
  if ((NS_SUCCEEDED(aUpdateUrl->SchemeIs("file", &match)) && match) ||
      (NS_SUCCEEDED(aUpdateUrl->SchemeIs("data", &match)) && match)) {
    mChannel->SetContentType(NS_LITERAL_CSTRING("application/vnd.google.safebrowsing-update"));
  } else {
    // We assume everything else is an HTTP request.

    // Disable keepalive.
    nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(mChannel, &rv);
    NS_ENSURE_SUCCESS(rv, rv);
    rv = httpChannel->SetRequestHeader(NS_LITERAL_CSTRING("Connection"), NS_LITERAL_CSTRING("close"), false);
    NS_ENSURE_SUCCESS(rv, rv);
  }

  // Create a custom LoadContext for SafeBrowsing, so we can use callbacks on
  // the channel to query the appId which allows separation of safebrowsing
  // cookies in a separate jar.
  nsCOMPtr<nsIInterfaceRequestor> sbContext =
    new mozilla::LoadContext(NECKO_SAFEBROWSING_APP_ID);
  rv = mChannel->SetNotificationCallbacks(sbContext);
  NS_ENSURE_SUCCESS(rv, rv);

  // Make the request.
  rv = mChannel->AsyncOpen2(this);
  NS_ENSURE_SUCCESS(rv, rv);

  mStreamTable = aStreamTable;

  return NS_OK;
}

NS_IMETHODIMP
nsUrlClassifierStreamUpdater::DownloadUpdates(
  const nsACString &aRequestTables,
  const nsACString &aRequestBody,
  const nsACString &aUpdateUrl,
  nsIUrlClassifierCallback *aSuccessCallback,
  nsIUrlClassifierCallback *aUpdateErrorCallback,
  nsIUrlClassifierCallback *aDownloadErrorCallback,
  bool *_retval)
{
  NS_ENSURE_ARG(aSuccessCallback);
  NS_ENSURE_ARG(aUpdateErrorCallback);
  NS_ENSURE_ARG(aDownloadErrorCallback);

  if (mIsUpdating) {
    LOG(("Already updating, queueing update %s from %s", aRequestBody.Data(),
         aUpdateUrl.Data()));
    *_retval = false;
    PendingRequest *request = mPendingRequests.AppendElement();
    request->mTables = aRequestTables;
    request->mRequest = aRequestBody;
    request->mUrl = aUpdateUrl;
    request->mSuccessCallback = aSuccessCallback;
    request->mUpdateErrorCallback = aUpdateErrorCallback;
    request->mDownloadErrorCallback = aDownloadErrorCallback;
    return NS_OK;
  }

  if (aUpdateUrl.IsEmpty()) {
    NS_ERROR("updateUrl not set");
    return NS_ERROR_NOT_INITIALIZED;
  }

  nsresult rv;

  if (!mInitialized) {
    // Add an observer for shutdown so we can cancel any pending list
    // downloads.  quit-application is the same event that the download
    // manager listens for and uses to cancel pending downloads.
    nsCOMPtr<nsIObserverService> observerService =
      mozilla::services::GetObserverService();
    if (!observerService)
      return NS_ERROR_FAILURE;

    observerService->AddObserver(this, gQuitApplicationMessage, false);

    mDBService = do_GetService(NS_URLCLASSIFIERDBSERVICE_CONTRACTID, &rv);
    NS_ENSURE_SUCCESS(rv, rv);

    mInitialized = true;
  }

  rv = mDBService->BeginUpdate(this, aRequestTables);
  if (rv == NS_ERROR_NOT_AVAILABLE) {
    LOG(("Service busy, already updating, queuing update %s from %s",
         aRequestBody.Data(), aUpdateUrl.Data()));
    *_retval = false;
    PendingRequest *request = mPendingRequests.AppendElement();
    request->mTables = aRequestTables;
    request->mRequest = aRequestBody;
    request->mUrl = aUpdateUrl;
    request->mSuccessCallback = aSuccessCallback;
    request->mUpdateErrorCallback = aUpdateErrorCallback;
    request->mDownloadErrorCallback = aDownloadErrorCallback;
    return NS_OK;
  }

  if (NS_FAILED(rv)) {
    return rv;
  }

  mSuccessCallback = aSuccessCallback;
  mUpdateErrorCallback = aUpdateErrorCallback;
  mDownloadErrorCallback = aDownloadErrorCallback;

  mIsUpdating = true;
  *_retval = true;

  LOG(("FetchUpdate: %s", aUpdateUrl.Data()));
  //LOG(("requestBody: %s", aRequestBody.Data()));

  return FetchUpdate(aUpdateUrl, aRequestBody, EmptyCString());
}