/// <summary>read</summary>
/// <exception cref="System.Exception"/>
public virtual void Read(File file, PDXReaderListener pdxReaderListener)
{
try
{
/*
* start
*/
pdxReaderListener.Start();
/*
* set up streams
*/
BufferedInputStream bufferedInputStream = new BufferedInputStream(new FileInputStream
(file));
LittleEndianDataInputStream littleEndianDataInputStream = new LittleEndianDataInputStream
(bufferedInputStream);
try
{
/*
* mark and read the headers
*/
bufferedInputStream.Mark(MaxHeaderSize);
ReadHeaders(littleEndianDataInputStream);
/*
* call the api
*/
pdxReaderListener.Header(dbTableHeader);
/*
* read the block data
*/
bufferedInputStream.Reset();
ReadBlocks(bufferedInputStream, pdxReaderListener);
/*
* done
*/
pdxReaderListener.Finish();
}
finally
{
littleEndianDataInputStream.Close();
bufferedInputStream.Close();
}
}
catch (Exception e)
{
throw new Exception("Exception in read", e);
}
}
public static FileType?DetectFileType([NotNull] BufferedInputStream inputStream)
{
int maxByteCount = _root.GetMaxDepth();
inputStream.Mark(maxByteCount);
sbyte[] bytes = new sbyte[maxByteCount];
int bytesRead = inputStream.Read(bytes);
if (bytesRead == -1)
{
throw new IOException("Stream ended before file's magic number could be determined.");
}
inputStream.Reset();
//noinspection ConstantConditions
return(_root.Find(bytes));
}
//import eu.europa.ec.markt.dss.validation.asic.ASiCXMLDocumentValidator;
//import eu.europa.ec.markt.dss.validation.pades.PDFDocumentValidator;
//import eu.europa.ec.markt.dss.validation.xades.XMLDocumentValidator;
/// <summary>Guess the document format and return an appropriate document</summary>
/// <param name="document"></param>
/// <returns></returns>
/// <exception cref="System.IO.IOException"></exception>
public static SignedDocumentValidator FromDocument(Document document)
{
InputStream input = null;
try
{
input = new BufferedInputStream(document.OpenStream());
input.Mark(5);
byte[] preamble = new byte[5];
int read = input.Read(preamble);
input.Reset();
if (read < 5)
{
throw new RuntimeException("Not a signed document");
}
string preambleString = Sharpen.Runtime.GetStringForBytes(preamble);
if (Sharpen.Runtime.GetBytesForString(preambleString)[0] == unchecked ((int)(0x30)
))
{
try
{
return(new CMSDocumentValidator(document));
}
catch (CmsException)
{
throw new IOException("Not a valid CAdES file");
}
}
else
{
throw new RuntimeException("Document format not recognized/handled");
}
}
finally
{
if (input != null)
{
try
{
input.Close();
}
catch (IOException)
{
}
}
}
}
/// <exception cref="System.IO.IOException"/>
private BufferedInputStream ReadStreamHeader()
{
// We are flexible enough to allow the compressed stream not to
// start with the header of BZ. So it works fine either we have
// the header or not.
if (base.@in != null)
{
bufferedIn.Mark(HeaderLen);
byte[] headerBytes = new byte[HeaderLen];
int actualRead = bufferedIn.Read(headerBytes, 0, HeaderLen);
if (actualRead != -1)
{
string header = new string(headerBytes, Charsets.Utf8);
if (string.CompareOrdinal(header, Header) != 0)
{
bufferedIn.Reset();
}
else
{
this.isHeaderStripped = true;
// In case of BYBLOCK mode, we also want to strip off
// remaining two character of the header.
if (this.readMode == SplittableCompressionCodec.READ_MODE.Byblock)
{
actualRead = bufferedIn.Read(headerBytes, 0, SubHeaderLen);
if (actualRead != -1)
{
this.isSubHeaderStripped = true;
}
}
}
}
}
if (bufferedIn == null)
{
throw new IOException("Failed to read bzip2 stream.");
}
return(bufferedIn);
}
/// <summary>read</summary>
/// <exception cref="Com.Khubla.Pdxreader.Api.PDXReaderException"/>
public virtual void Read(File file)
{
try
{
/*
* set up streams
*/
BufferedInputStream bufferedInputStream = new BufferedInputStream(new FileInputStream
(file));
LittleEndianDataInputStream littleEndianDataInputStream = new LittleEndianDataInputStream
(bufferedInputStream);
try
{
/*
* mark and read the headers
*/
bufferedInputStream.Mark(MaxHeaderSize);
ReadHeaders(littleEndianDataInputStream);
/*
* read the block data
*/
bufferedInputStream.Reset();
ReadBlocks(bufferedInputStream);
}
finally
{
littleEndianDataInputStream.Close();
bufferedInputStream.Close();
}
}
catch (Exception e)
{
throw new PDXReaderException("Exception in read", e);
}
}
/// <summary>read block data</summary>
/// <exception cref="Com.Khubla.Pdxreader.Api.PDXReaderException"/>
private void ReadBlocks(BufferedInputStream bufferedInputStream, PDXReaderListener
pdxReaderListener)
{
try
{
/*
* init the array
*/
blocks = new Hashtable <int, DBTableBlock>();
/*
* skip to the first block
*/
int nSkip = dbTableHeader.GetBlockSize().GetValue() * 1024;
if (nSkip == bufferedInputStream.Skip(nSkip))
{
/*
* walk blocks
*/
int blocksInUse = dbTableHeader.GetBlocksInUse();
for (int i = 0; i < blocksInUse; i++)
{
/*
* block
*/
DBTableBlock pdxTableBlock = new DBTableBlock(i + 1, dbTableHeader.CalculateRecordsPerBlock
(), dbTableHeader.GetFields());
/*
* mark at the start of the block
*/
bufferedInputStream.Mark(MaxBlockSize);
/*
* read the block data
*/
pdxTableBlock.Read(pdxReaderListener, bufferedInputStream);
/*
* store it. blocks are numbered from 1, not from 0.
*/
blocks[pdxTableBlock.GetBlockNumber()] = pdxTableBlock;
/*
* reset to the start of the block
*/
bufferedInputStream.Reset();
/*
* skip ahead to next block
*/
bufferedInputStream.Skip(dbTableHeader.GetBlockSize().GetValue() * 1024);
}
}
else
{
throw new PDXReaderException("File format exception");
}
}
catch (Exception e)
{
throw new PDXReaderException("Exception in readBlocks", e);
}
}
public static string getCharset(string fileName)
{
BufferedInputStream bis = null;
string charset = "GBK";
byte[] first3Bytes = new byte[3];
try
{
bool check = false;
bis = new BufferedInputStream(new System.IO.FileStream(fileName, System.IO.FileMode.OpenOrCreate));
bis.Mark(0);
int read = bis.Read(first3Bytes, 0, 3);
if (read == -1)
{
return(charset);
}
if (first3Bytes[0] == (byte)0xFF && first3Bytes[1] == (byte)0xFE)
{
charset = "UTF-16LE";
check = true;
}
else if (first3Bytes[0] == (byte)0xFE &&
first3Bytes[1] == (byte)0xFF)
{
charset = "UTF-16BE";
check = true;
}
else if (first3Bytes[0] == (byte)0xEF &&
first3Bytes[1] == (byte)0xBB &&
first3Bytes[2] == (byte)0xBF)
{
charset = "UTF-8";
check = true;
}
bis.Mark(0);
if (!check)
{
while ((read = bis.Read()) != -1)
{
if (read >= 0xF0)
{
break;
}
if (0x80 <= read && read <= 0xBF) // 单独出现BF以下的，也算是GBK
{
break;
}
if (0xC0 <= read && read <= 0xDF)
{
read = bis.Read();
if (0x80 <= read && read <= 0xBF) // 双字节 (0xC0 - 0xDF)
// (0x80 - 0xBF),也可能在GB编码内
{
continue;
}
else
{
break;
}
}
else if (0xE0 <= read && read <= 0xEF)
{// 也有可能出错，但是几率较小
read = bis.Read();
if (0x80 <= read && read <= 0xBF)
{
read = bis.Read();
if (0x80 <= read && read <= 0xBF)
{
charset = "UTF-8";
break;
}
else
{
break;
}
}
else
{
break;
}
}
}
}
}
catch (Exception e)
{
e.PrintStackTrace();
}
finally
{
if (bis != null)
{
try
{
bis.Close();
}
catch (IOException e)
{
e.PrintStackTrace();
}
}
}
return(charset);
}
/// <exception cref="System.IO.IOException"></exception>
/// <exception cref="NGit.Errors.CorruptObjectException"></exception>
private void ReadFrom(InputStream inStream)
{
BufferedInputStream @in = new BufferedInputStream(inStream);
MessageDigest md = Constants.NewMessageDigest();
// Read the index header and verify we understand it.
//
byte[] hdr = new byte[20];
IOUtil.ReadFully(@in, hdr, 0, 12);
md.Update(hdr, 0, 12);
if (!Is_DIRC(hdr))
{
throw new CorruptObjectException(JGitText.Get().notADIRCFile);
}
int ver = NB.DecodeInt32(hdr, 4);
bool extended = false;
if (ver == 3)
{
extended = true;
}
else
{
if (ver != 2)
{
throw new CorruptObjectException(MessageFormat.Format(JGitText.Get().unknownDIRCVersion
, ver));
}
}
entryCnt = NB.DecodeInt32(hdr, 8);
if (entryCnt < 0)
{
throw new CorruptObjectException(JGitText.Get().DIRCHasTooManyEntries);
}
// Load the individual file entries.
//
int infoLength = DirCacheEntry.GetMaximumInfoLength(extended);
byte[] infos = new byte[infoLength * entryCnt];
sortedEntries = new DirCacheEntry[entryCnt];
MutableInteger infoAt = new MutableInteger();
for (int i = 0; i < entryCnt; i++)
{
sortedEntries[i] = new DirCacheEntry(infos, infoAt, @in, md);
}
snapshot = FileSnapshot.Save(liveFile);
// After the file entries are index extensions, and then a footer.
//
for (; ;)
{
@in.Mark(21);
IOUtil.ReadFully(@in, hdr, 0, 20);
if (@in.Read() < 0)
{
// No extensions present; the file ended where we expected.
//
break;
}
@in.Reset();
md.Update(hdr, 0, 8);
IOUtil.SkipFully(@in, 8);
long sz = NB.DecodeUInt32(hdr, 4);
switch (NB.DecodeInt32(hdr, 0))
{
case EXT_TREE:
{
if (int.MaxValue < sz)
{
throw new CorruptObjectException(MessageFormat.Format(JGitText.Get().DIRCExtensionIsTooLargeAt
, FormatExtensionName(hdr), sz));
}
byte[] raw = new byte[(int)sz];
IOUtil.ReadFully(@in, raw, 0, raw.Length);
md.Update(raw, 0, raw.Length);
tree = new DirCacheTree(raw, new MutableInteger(), null);
break;
}
default:
{
if (hdr[0] >= 'A' && ((sbyte)hdr[0]) <= 'Z')
{
// The extension is optional and is here only as
// a performance optimization. Since we do not
// understand it, we can safely skip past it, after
// we include its data in our checksum.
//
SkipOptionalExtension(@in, md, hdr, sz);
}
else
{
// The extension is not an optimization and is
// _required_ to understand this index format.
// Since we did not trap it above we must abort.
//
throw new CorruptObjectException(MessageFormat.Format(JGitText.Get().DIRCExtensionNotSupportedByThisVersion
, FormatExtensionName(hdr)));
}
break;
}
}
}
byte[] exp = md.Digest();
if (!Arrays.Equals(exp, hdr))
{
throw new CorruptObjectException(JGitText.Get().DIRCChecksumMismatch);
}
}
/// <summary>read block data</summary>
/// <exception cref="Com.Khubla.Pdxreader.Api.PDXReaderException"/>
private void ReadBlocks(BufferedInputStream bufferedInputStream)
{
try
{
/*
* init the array
*/
blocks = new List <PXIndexBlock>();
/*
* skip to the first index block
*/
int nSkip = pxFileHeader.GetBlockSize().GetValue() * 1024;
if (nSkip == bufferedInputStream.Skip(nSkip))
{
/*
* walk index blocks
*/
int blocksInUse = pxFileHeader.GetBlocksInUse();
for (int i = 0; i < blocksInUse; i++)
{
/*
* block
*/
PXIndexBlock pxIndexBlock = new PXIndexBlock();
/*
* mark at the start of the block
*/
bufferedInputStream.Mark(MaxBlockSize);
/*
* read the block data
*/
pxIndexBlock.Read(bufferedInputStream);
/*
* store it. blocks are numbered from 1, not from 0.
*/
blocks.Add(pxIndexBlock);
/*
* reset to the start of the block
*/
bufferedInputStream.Reset();
/*
* skip ahead to next block
*/
bufferedInputStream.Skip(pxFileHeader.GetBlockSize().GetValue() * 1024);
}
}
else
{
throw new PDXReaderException("File format exception");
}
}
catch (Exception e)
{
throw new PDXReaderException("Exception in readBlocks", e);
}
}
