/// <summary>
/// Get a Stream for reading the specified entry
/// </summary>
/// <param name="entry"></param>
/// <returns></returns>
public Stream GetInputStream(ZipEntry entry)
{
if (entry.Size == 0)
{
return(null);
}
if (entries == null)
{
throw new InvalidOperationException("ZipFile has closed");
}
int index = (int)entry.ZipFileIndex;
if (index < 0 || index >= entries.Length || entries[index].Name != entry.Name)
{
throw new IndexOutOfRangeException();
}
// WARNING
// should parse the Local Header to get the data address
// Maximum Size of the Local Header is ... 16+64K*2
//
// So the HTTP request should ask for the big local header, but actually the
// additional data is not downloaded.
// Optionally use an additional Request to be really precise
//HttpWebRequest req = (HttpWebRequest)WebRequest.Create(baseUrl);
int limit = (int)(entry.Offset + entry.CompressedSize + 16 + 65536 * 2);
if (limit >= MaxFileOffset)
{
limit = MaxFileOffset - 1;
}
//req.AddRange((int)entry.Offset, limit);
//HttpWebResponse res = (HttpWebResponse)req.GetResponse();
//Stream baseStream = res.GetResponseStream();
Stream baseStream = protocolProvider.CreateStream(this.url, (int)entry.Offset, limit);
// skips all the header
SkipLocalHeader(baseStream, entries[index]);
CompressionMethod method = entries[index].CompressionMethod;
Stream istr = new PartialInputStream(baseStream, entries[index].CompressedSize);
switch (method)
{
case CompressionMethod.Stored:
return(istr);
case CompressionMethod.Deflated:
return(new InflaterInputStream(istr, new Inflater(true)));
case (CompressionMethod)12:
return(new BZip2InputStream(istr));
default:
throw new ZipException("Unknown compression method " + method);
}
}
/// <summary>
/// Get a Stream for reading the specified entry
/// </summary>
/// <param name="entry"></param>
/// <returns></returns>
public Stream GetInputStream(ZipEntry entry)
{
if(entry.Size == 0)
return null;
if (entries == null)
{
throw new InvalidOperationException("ZipFile has closed");
}
int index = (int)entry.ZipFileIndex;
if (index < 0 || index >= entries.Length || entries[index].Name != entry.Name)
{
throw new IndexOutOfRangeException();
}
// WARNING
// should parse the Local Header to get the data address
// Maximum Size of the Local Header is ... 16+64K*2
//
// So the HTTP request should ask for the big local header, but actually the
// additional data is not downloaded.
// Optionally use an additional Request to be really precise
//HttpWebRequest req = (HttpWebRequest)WebRequest.Create(baseUrl);
int limit = (int)(entry.Offset+entry.CompressedSize+16+65536*2);
if(limit >= MaxFileOffset)
limit = MaxFileOffset-1;
//req.AddRange((int)entry.Offset, limit);
//HttpWebResponse res = (HttpWebResponse)req.GetResponse();
//Stream baseStream = res.GetResponseStream();
Stream baseStream = protocolProvider.CreateStream(this.url, (int)entry.Offset, limit);
// skips all the header
SkipLocalHeader(baseStream, entries[index]);
CompressionMethod method = entries[index].CompressionMethod;
Stream istr = new PartialInputStream(baseStream, entries[index].CompressedSize);
switch (method)
{
case CompressionMethod.Stored:
return istr;
case CompressionMethod.Deflated:
return new InflaterInputStream(istr, new Inflater(true));
case (CompressionMethod)12:
return new BZip2InputStream(istr);
default:
throw new ZipException("Unknown compression method " + method);
}
}
