/// <inheritdoc cref="FileListEntryStream" />
/// <summary>
/// Initializes a new instance of the <see cref="SharedMemoryFileListEntryStream"/> class.
/// </summary>
/// <param name="javascriptRuntime">The JavaScript runtime.</param>
/// <param name="inputFileElement">The input file reference.</param>
/// <param name="file">The <see cref="FileListEntry"/>.</param>
/// <seealso cref="FileListEntryStream" />
public SharedMemoryFileListEntryStream(IJSRuntime javascriptRuntime, ElementReference inputFileElement, FileListEntry file)
: base(javascriptRuntime, inputFileElement, file)
{
}
/// <inheritdoc cref="FileListEntryStream" />
/// <summary>
/// Initializes a new instance of the <see cref="RemoteFileListEntryStream" /> class.
/// </summary>
/// <param name="javascriptRuntime">The JavaScript runtime.</param>
/// <param name="inputFileElement">The input file reference.</param>
/// <param name="file">The <see cref="FileListEntry" />.</param>
/// <param name="maximumMessageSize">The maximum message size.</param>
/// <param name="maxBufferSize">The maximum buffer size.</param>
/// <seealso cref="FileListEntryStream" />
public RemoteFileListEntryStream(IJSRuntime javascriptRuntime, ElementReference inputFileElement, FileListEntry file, int maximumMessageSize, int maxBufferSize)
: base(javascriptRuntime, inputFileElement, file)
{
this.maximumMessageSize = maximumMessageSize;
this.blockSequence = new PreFetchingSequence <Block>(this.FetchBase64Block, (file.Size + this.maximumMessageSize - 1) / this.maximumMessageSize, Math.Max(1, maxBufferSize / this.maximumMessageSize)); // Degree of parallelism on fetch
this.currentBlockDecodingBuffer = new byte[this.maximumMessageSize];
}
private bool IsMatchSearchMask(FileListEntry entry, string fileMask)
{
return fileMask.SmartSplit(false, true, ' ')
.All(mask => IsMatchMask(entry.LocalPath, mask));
}
public static List<FileListEntry> SaveStream(Stream input_stream,
int max_part_size,
string output_folder,
string file_name,
bool encrypt,
string password)
{
List<FileListEntry> file_list = new List<FileListEntry>();
// set the stream data read position to the beginning
input_stream.Seek(0, SeekOrigin.Begin);
int index = 0;
int stream_size = (int)input_stream.Length;
int stream_offset = 0;
byte[] part_data = new byte[max_part_size];
do
{
FileListEntry file_list_entry = new FileListEntry();
Directory.CreateDirectory(output_folder);
file_list_entry.Location = String.Format("{0}\\{1}.{2}", output_folder, file_name, (index + 1).ToString("D03"));
file_list_entry.Index = index;
// create a part file
using (FileStream part_file = File.Open(file_list_entry.Location, FileMode.Create))
{
// calculate the part size
int difference = stream_size - stream_offset;
int part_size = (int)(difference < max_part_size ? difference : max_part_size);
// if the last part is going to be less than the minimum encryption block size
// reduce the size of the one before to make the last part the minimum size
if ((part_size == max_part_size) && ((stream_size - stream_offset - max_part_size) < 256))
part_size -= 256 - (stream_size - stream_offset - max_part_size);
// read the data to an intermediary buffer and write the buffer to disc
input_stream.Read(part_data, 0, part_size);
part_file.Write(part_data, 0, part_size);
if (encrypt)
{
// the password key is an MD5 hash of the password string
int[] key = new int[4];
BlamLib.Cryptography.XXTEA.BuildPasswordKey(key, password);
// get the unencrypted md5 for per part decryption comparisons on the client
file_list_entry.Encrypted = true;
file_list_entry.UnencryptedMD5 = BlamLib.Cryptography.MD5.GenerateMD5String(part_file);
// encrypt the file stream
BlamLib.Cryptography.XXTEA.EncryptStream256(part_file, key);
}
else
{
file_list_entry.Encrypted = false;
file_list_entry.UnencryptedMD5 = "";
}
part_file.Flush();
// get the final files MD5 for download validation on the client
file_list_entry.MD5 = BlamLib.Cryptography.MD5.GenerateMD5String(part_file);
file_list_entry.Size = (uint)part_file.Length;
file_list.Add(file_list_entry);
}
index++;
stream_offset += max_part_size;
}
while (stream_offset < stream_size);
return file_list;
}
public static List <FileListEntry> SaveStream(Stream input_stream,
int max_part_size,
string output_folder,
string file_name,
bool encrypt,
string password)
{
List <FileListEntry> file_list = new List <FileListEntry>();
// set the stream data read position to the beginning
input_stream.Seek(0, SeekOrigin.Begin);
int index = 0;
int stream_size = (int)input_stream.Length;
int stream_offset = 0;
byte[] part_data = new byte[max_part_size];
do
{
FileListEntry file_list_entry = new FileListEntry();
Directory.CreateDirectory(output_folder);
file_list_entry.Location = String.Format("{0}\\{1}.{2}", output_folder, file_name, (index + 1).ToString("D03"));
file_list_entry.Index = index;
// create a part file
using (FileStream part_file = File.Open(file_list_entry.Location, FileMode.Create))
{
// calculate the part size
int difference = stream_size - stream_offset;
int part_size = (int)(difference < max_part_size ? difference : max_part_size);
// if the last part is going to be less than the minimum encryption block size
// reduce the size of the one before to make the last part the minimum size
if ((part_size == max_part_size) && ((stream_size - stream_offset - max_part_size) < 256))
{
part_size -= 256 - (stream_size - stream_offset - max_part_size);
}
// read the data to an intermediary buffer and write the buffer to disc
input_stream.Read(part_data, 0, part_size);
part_file.Write(part_data, 0, part_size);
if (encrypt)
{
// the password key is an MD5 hash of the password string
int[] key = new int[4];
BlamLib.Cryptography.XXTEA.BuildPasswordKey(key, password);
// get the unencrypted md5 for per part decryption comparisons on the client
file_list_entry.Encrypted = true;
file_list_entry.UnencryptedMD5 = BlamLib.Cryptography.MD5.GenerateMD5String(part_file);
// encrypt the file stream
BlamLib.Cryptography.XXTEA.EncryptStream256(part_file, key);
}
else
{
file_list_entry.Encrypted = false;
file_list_entry.UnencryptedMD5 = "";
}
part_file.Flush();
// get the final files MD5 for download validation on the client
file_list_entry.MD5 = BlamLib.Cryptography.MD5.GenerateMD5String(part_file);
file_list_entry.Size = (uint)part_file.Length;
file_list.Add(file_list_entry);
}
index++;
stream_offset += max_part_size;
}while (stream_offset < stream_size);
return(file_list);
}
/// <summary>
/// Initializes a new instance of the <see cref="FileListEntryStream"/> class.
/// </summary>
/// <param name="javascriptRuntime">The JavaScript runtime.</param>
/// <param name="inputFileElement">The input file reference.</param>
/// <param name="file">The <see cref="FileListEntry"/>.</param>
protected FileListEntryStream(IJSRuntime javascriptRuntime, ElementReference inputFileElement, FileListEntry file)
{
this.JavascriptRuntime = javascriptRuntime;
this.InputFileElement = inputFileElement;
this.File = file;
}
