/// <summary>
/// Initialize the object without uploading any information from the package.
/// Complete initialization in read mode also involves calling ParseContentTypesFile
/// to deserialize content type information.
/// </summary>
internal ContentTypeHelper(ZipArchive zipArchive, FileMode packageFileMode, FileAccess packageFileAccess, ZipStreamManager zipStreamManager)
{
_zipArchive = zipArchive; //initialized in the ZipPackage constructor
_packageFileMode = packageFileMode;
_packageFileAccess = packageFileAccess;
_zipStreamManager = zipStreamManager; //initialized in the ZipPackage constructor
// The extensions are stored in the default Dictionary in their original form , but they are compared
// in a normalized manner using the ExtensionComparer.
_defaultDictionary = new Dictionary <string, ContentType>(s_defaultDictionaryInitialSize, s_extensionEqualityComparer);
// Identify the content type file or files before identifying parts and piece sequences.
// This is necessary because the name of the content type stream is not a part name and
// the information it contains is needed to recognize valid parts.
if (_zipArchive.Mode == ZipArchiveMode.Read || _zipArchive.Mode == ZipArchiveMode.Update)
{
ParseContentTypesFile(_zipArchive.Entries);
}
//No contents to persist to the disk -
_dirty = false; //by default
//Lazy initialize these members as required
//_overrideDictionary - Overrides should be rare
//_contentTypeFileInfo - We will either find an atomin part, or
//_contentTypeStreamPieces - an interleaved part
//_contentTypeStreamExists - defaults to false - not yet found
}
//------------------------------------------------------
//
// Public Events
//
//------------------------------------------------------
// None
//------------------------------------------------------
//
// Internal Constructors
//
//------------------------------------------------------
#region Internal Constructors
/// <summary>
/// Constructs a ZipPackagePart for an atomic (i.e. non-interleaved) part.
/// This is called from the ZipPackage class as a result of GetPartCore,
/// GetPartsCore or CreatePartCore methods
/// </summary>
/// <param name="zipPackage"></param>
/// <param name="zipArchive"></param>
/// <param name="zipArchiveEntry"></param>
/// <param name="zipStreamManager"></param>
/// <param name="partUri"></param>
/// <param name="compressionOption"></param>
/// <param name="contentType"></param>
internal ZipPackagePart(ZipPackage zipPackage,
ZipArchive zipArchive,
ZipArchiveEntry zipArchiveEntry,
ZipStreamManager zipStreamManager,
PackUriHelper.ValidatedPartUri partUri,
string contentType,
CompressionOption compressionOption)
: base(zipPackage, partUri, contentType, compressionOption)
{
_zipPackage = zipPackage;
_zipArchive = zipArchive;
_zipStreamManager = zipStreamManager;
_zipArchiveEntry = zipArchiveEntry;
}
/// <summary>
/// Constructs a ZipPackagePart for an atomic (i.e. non-interleaved) part.
/// This is called from the ZipPackage class as a result of GetPartCore,
/// GetPartsCore or CreatePartCore methods
/// </summary>
/// <param name="zipPackage"></param>
/// <param name="zipArchive"></param>
/// <param name="zipArchiveEntry"></param>
/// <param name="zipStreamManager"></param>
/// <param name="partUri"></param>
/// <param name="compressionOption"></param>
/// <param name="contentType"></param>
internal ZipPackagePart(ZipPackage zipPackage,
ZipArchive zipArchive,
ZipArchiveEntry zipArchiveEntry,
ZipStreamManager zipStreamManager,
PackUriHelper.ValidatedPartUri partUri,
string contentType,
CompressionOption compressionOption)
: base(zipPackage, partUri, contentType, compressionOption)
{
_zipPackage = zipPackage;
_zipArchive = zipArchive;
_zipStreamManager = zipStreamManager;
_zipArchiveEntry = zipArchiveEntry;
}
/// <summary>
/// Internal constructor that is called by the Open(Stream) static methods.
/// </summary>
/// <param name="s"></param>
/// <param name="packageFileMode"></param>
/// <param name="packageFileAccess"></param>
internal ZipPackage(Stream s, FileMode packageFileMode, FileAccess packageFileAccess)
: base(packageFileAccess)
{
ZipArchive zipArchive = null;
ContentTypeHelper contentTypeHelper = null;
_packageFileMode = packageFileMode;
_packageFileAccess = packageFileAccess;
try
{
ZipArchiveMode zipArchiveMode = ZipArchiveMode.Update;
if (packageFileAccess == FileAccess.Read)
{
zipArchiveMode = ZipArchiveMode.Read;
}
else if (packageFileAccess == FileAccess.Write)
{
zipArchiveMode = ZipArchiveMode.Create;
}
else if (packageFileAccess == FileAccess.ReadWrite)
{
zipArchiveMode = ZipArchiveMode.Update;
}
zipArchive = new ZipArchive(s, zipArchiveMode, true, Text.Encoding.UTF8);
_zipStreamManager = new ZipStreamManager(zipArchive, packageFileMode, packageFileAccess);
contentTypeHelper = new ContentTypeHelper(zipArchive, packageFileMode, packageFileAccess, _zipStreamManager);
}
catch (InvalidDataException)
{
throw new FileFormatException("File contains corrupted data.");
}
catch
{
if (zipArchive != null)
{
zipArchive.Dispose();
}
throw;
}
_containerStream = s;
_shouldCloseContainerStream = false;
_zipArchive = zipArchive;
_contentTypeHelper = contentTypeHelper;
}
/// <summary>
/// Internal constructor that is called by the OpenOnFile static method.
/// </summary>
/// <param name="path">File path to the container.</param>
/// <param name="packageFileMode">Container is opened in the specified mode if possible</param>
/// <param name="packageFileAccess">Container is opened with the specified access if possible</param>
/// <param name="share">Container is opened with the specified share if possible</param>
internal ZipPackage(string path, FileMode packageFileMode, FileAccess packageFileAccess, FileShare share)
: base(packageFileAccess)
{
ZipArchive zipArchive = null;
ContentTypeHelper contentTypeHelper = null;
_packageFileMode = packageFileMode;
_packageFileAccess = packageFileAccess;
try
{
_containerStream = new FileStream(path, _packageFileMode, _packageFileAccess, share);
_shouldCloseContainerStream = true;
ZipArchiveMode zipArchiveMode = ZipArchiveMode.Update;
if (packageFileAccess == FileAccess.Read)
{
zipArchiveMode = ZipArchiveMode.Read;
}
else if (packageFileAccess == FileAccess.Write)
{
zipArchiveMode = ZipArchiveMode.Create;
}
else if (packageFileAccess == FileAccess.ReadWrite)
{
zipArchiveMode = ZipArchiveMode.Update;
}
zipArchive = new ZipArchive(_containerStream, zipArchiveMode, true, Text.Encoding.UTF8);
_zipStreamManager = new ZipStreamManager(zipArchive, _packageFileMode, _packageFileAccess);
contentTypeHelper = new ContentTypeHelper(zipArchive, _packageFileMode, _packageFileAccess, _zipStreamManager);
}
catch
{
if (zipArchive != null)
{
zipArchive.Dispose();
}
throw;
}
_zipArchive = zipArchive;
_contentTypeHelper = contentTypeHelper;
}
/// <summary>
/// Internal constructor that is called by the Open(Stream) static methods.
/// </summary>
/// <param name="s"></param>
/// <param name="packageFileMode"></param>
/// <param name="packageFileAccess"></param>
internal ZipPackage(Stream s, FileMode packageFileMode, FileAccess packageFileAccess)
: base(packageFileAccess)
{
ZipArchive? zipArchive = null;
ContentTypeHelper?contentTypeHelper;
_packageFileMode = packageFileMode;
_packageFileAccess = packageFileAccess;
try
{
if (s.CanSeek)
{
switch (packageFileMode)
{
case FileMode.Open:
if (s.Length == 0)
{
throw new FileFormatException(SR.ZipZeroSizeFileIsNotValidArchive);
}
break;
case FileMode.CreateNew:
if (s.Length != 0)
{
throw new IOException(SR.CreateNewOnNonEmptyStream);
}
break;
case FileMode.Create:
if (s.Length != 0)
{
s.SetLength(0); // Discard existing data
}
break;
}
}
ZipArchiveMode zipArchiveMode = ZipArchiveMode.Update;
if (packageFileAccess == FileAccess.Read)
{
zipArchiveMode = ZipArchiveMode.Read;
}
else if (packageFileAccess == FileAccess.Write)
{
zipArchiveMode = ZipArchiveMode.Create;
}
else if (packageFileAccess == FileAccess.ReadWrite)
{
zipArchiveMode = ZipArchiveMode.Update;
}
zipArchive = new ZipArchive(s, zipArchiveMode, true, Text.Encoding.UTF8);
_zipStreamManager = new ZipStreamManager(zipArchive, packageFileMode, packageFileAccess);
contentTypeHelper = new ContentTypeHelper(zipArchive, packageFileMode, packageFileAccess, _zipStreamManager);
}
catch (InvalidDataException)
{
throw new FileFormatException(SR.FileContainsCorruptedData);
}
catch
{
zipArchive?.Dispose();
throw;
}
_containerStream = s;
_shouldCloseContainerStream = false;
_zipArchive = zipArchive;
_contentTypeHelper = contentTypeHelper;
}
