public static Stream GetCompressedResponseStream(this HttpWebResponse response)
{
if (response == null)
{
throw new ArgumentNullException("response");
}
Stream responseStream = ((WebResponse)response).GetResponseStream();
if (!string.Equals(response.Headers[HttpRequestHeader.ContentEncoding], GzipExtensions.GZIP, StringComparison.OrdinalIgnoreCase))
{
return(responseStream);
}
if (31 != responseStream.ReadByte() || 139 != responseStream.ReadByte() || 8 != responseStream.ReadByte())
{
throw new NotSupportedException("Compressed data not in the expected format.");
}
int num1 = responseStream.ReadByte();
bool flag1 = (uint)(2 & num1) > 0U;
int num2 = (uint)(4 & num1) > 0U ? 1 : 0;
bool flag2 = (uint)(8 & num1) > 0U;
bool flag3 = (uint)(16 & num1) > 0U;
responseStream.ReadByte();
responseStream.ReadByte();
responseStream.ReadByte();
responseStream.ReadByte();
responseStream.ReadByte();
responseStream.ReadByte();
if (num2 != 0)
{
for (int index = responseStream.ReadByte() | responseStream.ReadByte() << 8; 0 < index; --index)
{
responseStream.ReadByte();
}
}
if (flag2)
{
while (responseStream.ReadByte() != 0)
{
;
}
}
if (flag3)
{
while (responseStream.ReadByte() != 0)
{
;
}
}
if (flag1)
{
responseStream.ReadByte();
responseStream.ReadByte();
}
List <byte[]> numArrayList = new List <byte[]>();
byte[] buffer1 = new byte[4096];
int offset = 0;
int num3 = 0;
int num4;
do
{
if (buffer1.Length == offset)
{
numArrayList.Add(buffer1);
buffer1 = new byte[buffer1.Length];
offset = 0;
}
num4 = responseStream.Read(buffer1, offset, buffer1.Length - offset);
offset += num4;
num3 += num4;
}while (0 < num4);
numArrayList.Add(buffer1);
int num5 = num3 - 4 - 4;
if (num5 < 0)
{
throw new NotSupportedException("Compressed data not in the expected format.");
}
byte[] buffer2 = new byte[31 + num5 + 69];
int num6 = 31;
int val2 = num3;
foreach (byte[] numArray1 in numArrayList)
{
int num7 = Math.Min(numArray1.Length, val2);
int sourceIndex = 0;
byte[] numArray2 = buffer2;
int destinationIndex = num6;
int length = num7;
Array.Copy((Array)numArray1, sourceIndex, (Array)numArray2, destinationIndex, length);
num6 += num7;
val2 -= num7;
}
int index1 = 31 + num5;
int num8 = (int)buffer2[index1] | (int)buffer2[index1 + 1] << 8 | (int)buffer2[index1 + 2] << 16 | (int)buffer2[index1 + 3] << 24;
int num9 = (int)buffer2[index1 + 4] | (int)buffer2[index1 + 5] << 8 | (int)buffer2[index1 + 6] << 16 | (int)buffer2[index1 + 7] << 24;
MemoryStream memoryStream = new MemoryStream(buffer2);
BinaryWriter binaryWriter = new BinaryWriter((Stream)memoryStream);
int num10 = 67324752;
binaryWriter.Write((uint)num10);
int num11 = 20;
binaryWriter.Write((ushort)num11);
int num12 = 0;
binaryWriter.Write((ushort)num12);
int num13 = 8;
binaryWriter.Write((ushort)num13);
int num14 = 0;
binaryWriter.Write((ushort)num14);
int num15 = 0;
binaryWriter.Write((ushort)num15);
int num16 = num8;
binaryWriter.Write(num16);
int num17 = num5;
binaryWriter.Write(num17);
int num18 = num9;
binaryWriter.Write(num18);
int num19 = 1;
binaryWriter.Write((ushort)num19);
int num20 = 0;
binaryWriter.Write((ushort)num20);
int num21 = (int)(byte)"f"[0];
binaryWriter.Write((byte)num21);
memoryStream.Seek((long)num5, SeekOrigin.Current);
int num22 = 33639248;
binaryWriter.Write((uint)num22);
int num23 = 20;
binaryWriter.Write((ushort)num23);
int num24 = 20;
binaryWriter.Write((ushort)num24);
int num25 = 0;
binaryWriter.Write((ushort)num25);
int num26 = 8;
binaryWriter.Write((ushort)num26);
int num27 = 0;
binaryWriter.Write((ushort)num27);
int num28 = 0;
binaryWriter.Write((ushort)num28);
int num29 = num8;
binaryWriter.Write(num29);
int num30 = num5;
binaryWriter.Write(num30);
int num31 = num9;
binaryWriter.Write(num31);
int num32 = 1;
binaryWriter.Write((ushort)num32);
int num33 = 0;
binaryWriter.Write((ushort)num33);
int num34 = 0;
binaryWriter.Write((ushort)num34);
int num35 = 0;
binaryWriter.Write((ushort)num35);
int num36 = 0;
binaryWriter.Write((ushort)num36);
int num37 = 0;
binaryWriter.Write((uint)num37);
int num38 = 0;
binaryWriter.Write((uint)num38);
int num39 = (int)(byte)"f"[0];
binaryWriter.Write((byte)num39);
int num40 = 101010256;
binaryWriter.Write((uint)num40);
int num41 = 0;
binaryWriter.Write((ushort)num41);
int num42 = 0;
binaryWriter.Write((ushort)num42);
int num43 = 1;
binaryWriter.Write((ushort)num43);
int num44 = 1;
binaryWriter.Write((ushort)num44);
int num45 = 47;
binaryWriter.Write((uint)num45);
int num46 = 31 + num5;
binaryWriter.Write((uint)num46);
int num47 = 0;
binaryWriter.Write((ushort)num47);
memoryStream.Seek(0, SeekOrigin.Begin);
Stopwatch stopwatch = Stopwatch.StartNew();
Stream stream = Application.GetResourceStream(new StreamResourceInfo((Stream)memoryStream, null), new Uri("f", UriKind.Relative)).Stream;
stopwatch.Stop();
GzipExtensions.LogCompression(memoryStream.Length, stream.Length);
return(stream);
}
public static IAsyncResult BeginGetCompressedResponse(this HttpWebRequest request, AsyncCallback callback, object state)
{
GzipExtensions.AddAcceptEncodingHeader(request);
return(request.BeginGetResponse(callback, state));
}