private Stream GetFilteredResponseStream(ConfigurationContextBase configurationContext, Stream inputStream, Charset charset, BlockStatus blockStatus)
{
BufferPool bufferPool = BufferPoolCollection.AutoCleanupCollection.Acquire(ZipEntryAttachment.CopyBufferSize);
byte[] array = bufferPool.Acquire();
Stream stream = new MemoryStream();
try
{
using (Stream filteredStream = AttachmentUtilities.GetFilteredStream(configurationContext, inputStream, charset, blockStatus))
{
try
{
int count;
while ((count = filteredStream.Read(array, 0, array.Length)) > 0)
{
stream.Write(array, 0, count);
}
}
finally
{
if (array != null)
{
bufferPool.Release(array);
}
}
}
stream.Seek(0L, SeekOrigin.Begin);
}
catch (Exception ex)
{
ExTraceGlobals.AttachmentHandlingTracer.TraceError <string>((long)this.GetHashCode(), "ZipEntryAttachment.GetfilteredStream: Safe HTML converter failed with exception {0}", ex.Message);
stream = new MemoryStream();
}
return(stream);
}
internal long WriteToStream(ConfigurationContextBase configurationContext, Stream outputStream, OutboundConversionOptions outboundConversionOptions, BlockStatus blockStatus, long outputStreamPosition, IList <string> fileNames, AttachmentCollection attachmentCollection)
{
this.headerOffset = outputStreamPosition;
Stream stream = null;
uint num = 0U;
using (Attachment attachment = attachmentCollection.Open(this.attachmentId))
{
try
{
if (attachment.AttachmentType == AttachmentType.EmbeddedMessage)
{
this.fileNames = fileNames;
stream = this.GetItemAttachmentStream(attachment, outboundConversionOptions);
}
else
{
this.fileNames = null;
stream = ZipEntryAttachment.GetStreamAttachmentStream(attachment);
}
if (stream.Length > 0L)
{
Stream stream2;
if (this.doNeedToFilterHtml)
{
if (this.CompressionMethod != 0)
{
stream2 = AttachmentUtilities.GetFilteredStream(configurationContext, stream, attachment.TextCharset, blockStatus);
}
else
{
stream2 = this.GetFilteredResponseStream(configurationContext, stream, attachment.TextCharset, blockStatus);
}
}
else
{
stream2 = this.GetUnfilteredStream(stream);
}
if (stream2 != stream)
{
stream.Close();
stream = stream2;
}
}
if (this.CompressionMethod == 0)
{
if (!stream.CanSeek)
{
throw new ArgumentException("stream", "Stream is required to support Seek operations, and does not");
}
this.attachmentSize = stream.Length;
}
this.WriteZipFileHeader(stream, outputStream);
this.WriteFileData(stream, outputStream, blockStatus);
if (this.CompressionMethod != 0)
{
num = this.WriteZipFileDescriptor(outputStream);
}
}
finally
{
if (stream != null)
{
stream.Close();
stream = null;
}
}
}
return((long)((ulong)(this.headerBytesWritten + this.attachmentBytesWritten + num)));
}
// Token: 0x06000107 RID: 263 RVA: 0x000041B0 File Offset: 0x000023B0
public Stream GetAttachmentStream(AttachmentHandler.IAttachmentRetriever attachmentRetriever, AttachmentHandler.IAttachmentPolicyChecker policyChecker, bool asDataUri)
{
ExTraceGlobals.AttachmentHandlingTracer.TraceDebug <string>((long)this.GetHashCode(), "AttachmentHandler.GetAttachmentStream: Getting attachment stream for id={0}", this.id);
if (string.IsNullOrEmpty(this.id))
{
ExTraceGlobals.AttachmentHandlingTracer.TraceDebug((long)this.GetHashCode(), "Attachment id is empty or null. returning null stream.");
throw new FaultException("Id cannot be null or empty.");
}
Stream stream = null;
ByteEncoder byteEncoder = null;
Stream stream2 = null;
Stream result;
try
{
Attachment attachment = attachmentRetriever.Attachment;
AttachmentPolicyLevel policy = policyChecker.GetPolicy(attachment, this.webOperationContext.IsPublicLogon);
if (AudioFile.IsProtectedVoiceAttachment(attachment.FileName))
{
attachment.ContentType = Utils.GetUnProtectedVoiceAttachmentContentType(attachment.FileName);
stream = DRMUtils.OpenProtectedAttachment(attachment, this.callContext.AccessingADUser.OrganizationId);
string fileName;
if (AudioFile.TryGetNonDRMFileNameFromDRM(attachment.FileName, out fileName))
{
attachment.FileName = fileName;
}
}
string text = AttachmentUtilities.GetContentType(attachment);
string fileExtension = attachment.FileExtension;
OleAttachment oleAttachment = attachment as OleAttachment;
if (oleAttachment != null)
{
stream = oleAttachment.ConvertToImage(ImageFormat.Jpeg);
if (stream != null)
{
text = "image/jpeg";
}
}
if (this.IsBlocked(policy) && !attachment.IsInline && !this.IsImagePreview)
{
ExTraceGlobals.AttachmentHandlingTracer.TraceDebug <string>((long)this.GetHashCode(), "Attachment is blocked. Returning null stream. id is {0}", this.id);
result = null;
}
else
{
this.WriteResponseHeaders(text, policy, attachment);
if (stream == null)
{
StreamAttachment streamAttachment = attachment as StreamAttachment;
if (streamAttachment != null)
{
if (string.Equals(text, "audio/mpeg", StringComparison.OrdinalIgnoreCase))
{
stream = streamAttachment.GetContentStream(PropertyOpenMode.Modify);
}
else
{
stream = streamAttachment.GetContentStream(PropertyOpenMode.ReadOnly);
}
}
else
{
ItemAttachment itemAttachment = attachment as ItemAttachment;
if (itemAttachment != null)
{
using (Item item = itemAttachment.GetItem(StoreObjectSchema.ContentConversionProperties))
{
IRecipientSession adrecipientSession = item.Session.GetADRecipientSession(true, ConsistencyMode.IgnoreInvalid);
OutboundConversionOptions outboundConversionOptions = new OutboundConversionOptions(this.callContext.DefaultDomain.DomainName.Domain);
outboundConversionOptions.ClearCategories = false;
outboundConversionOptions.UserADSession = adrecipientSession;
outboundConversionOptions.LoadPerOrganizationCharsetDetectionOptions(adrecipientSession.SessionSettings.CurrentOrganizationId);
stream = new MemoryStream();
ItemConversion.ConvertItemToMime(item, stream, outboundConversionOptions);
stream.Seek(0L, SeekOrigin.Begin);
}
}
}
}
long num = 0L;
long num2 = 0L;
if (AttachmentUtilities.NeedToFilterHtml(text, fileExtension, policy, this.configurationContext))
{
stream = AttachmentUtilities.GetFilteredStream(this.configurationContext, stream, attachment.TextCharset, attachmentRetriever.BlockStatus);
}
else if (this.NeedToSendPartialContent(stream, out num, out num2))
{
string value = string.Format(CultureInfo.InvariantCulture, "bytes {0}-{1}/{2}", new object[]
{
num,
num2,
stream.Length
});
this.webOperationContext.Headers["Accept-Ranges"] = "bytes";
this.webOperationContext.Headers["Content-Range"] = value;
this.webOperationContext.ETag = this.id;
this.webOperationContext.StatusCode = HttpStatusCode.PartialContent;
long num3 = num2 - num + 1L;
if (num3 < stream.Length)
{
ExTraceGlobals.AttachmentHandlingTracer.TraceDebug <long, long, long>((long)this.GetHashCode(), "RangeBytes:{0} - Seek:{1} - SetLength:{2}", num3, num, num2 + 1L);
stream.Seek(num, SeekOrigin.Begin);
return(new BoundedStream(stream, true, num, num2));
}
}
if (asDataUri)
{
byteEncoder = new Base64Encoder();
stream2 = new EncoderStream(stream, byteEncoder, EncoderStreamAccess.Read);
stream = new DataUriStream(stream2, text);
}
result = stream;
}
}
catch (Exception ex)
{
if (stream != null)
{
stream.Dispose();
}
if (stream2 != null)
{
stream2.Dispose();
}
if (byteEncoder != null)
{
byteEncoder.Dispose();
}
string formatString = string.Empty;
if (ex is ExchangeDataException)
{
formatString = "Fail to sanitize HTML getting attachment. id is {0}, Exception: {1}";
}
else if (ex is StoragePermanentException)
{
formatString = "StoragePermanentException when getting attachment. id is {0}, Exception: {1}";
}
else
{
if (!(ex is StorageTransientException))
{
throw;
}
formatString = "StorageTransientException when getting attachment. id is {0}, Exception: {1}";
}
ExTraceGlobals.AttachmentHandlingTracer.TraceError <string, Exception>((long)this.GetHashCode(), formatString, this.id, ex);
throw new CannotOpenFileAttachmentException(ex);
}
return(result);
}
