Javascript LZMA-JS压缩的C#等价
我使用了一些客户端javscript代码来压缩一些用户输入。 在后端代码中,我使用中的代码示例使用C#解压数据服务器端 这台机器运转得很好 现在我希望能够像javascript一样压缩字符串。当我使用压缩代码时,我得到一个从-128到128的有符号整数数组。现在我想用我的后端代码来做同样的事情 javascript中的LMZA属性与C#代码中的默认属性略有不同,但即使我将它们更改为相同的值,我也会从两个库中得到不同的结果 首先,C代码的输出值是无符号的。 其次,返回的字符数不同。 这些差异可能是由解码器的属性引起的,但我不知道如何使这两个库对齐 我的C#使用from 7zip 我的C#代码用于解压缩javascript压缩数据(以逗号分隔的有符号整数数组):Javascript LZMA-JS压缩的C#等价,javascript,c#,compression,Javascript,C#,Compression,我使用了一些客户端javscript代码来压缩一些用户输入。 在后端代码中,我使用中的代码示例使用C#解压数据服务器端 这台机器运转得很好 现在我希望能够像javascript一样压缩字符串。当我使用压缩代码时,我得到一个从-128到128的有符号整数数组。现在我想用我的后端代码来做同样的事情 javascript中的LMZA属性与C#代码中的默认属性略有不同,但即使我将它们更改为相同的值,我也会从两个库中得到不同的结果 首先,C代码的输出值是无符号的。 其次,返回的字符数不同。 这些差异可能是
公共静态无效解压缩(流内流、流外流)
{
字节[]属性=新字节[5];
流内读取(属性,0,5);
SevenZip.Compression.LZMA.Decoder解码器=新的SevenZip.Compression.LZMA.Decoder();
解码器.SetDecoderProperties(属性);
长超尺寸=0;
对于(int i=0;i<8;i++)
{
int v=inStream.ReadByte();
超大|=((长)(字节)v)(字节)int.Parse(s));
var stream=新的内存流(myint);
var outputStream=new MemoryStream();
解压缩(流、输出流);
使用(var reader=newstreamreader(outputStream))
{
outputStream.Position=0;
字符串输出=reader.ReadToEnd();
返回输出;
}
}
返回“”;
}
压缩数据的代码如下(字节数不同且无符号):
publicstaticstringcompresslzma(stringinputstring)
{
如果(!string.IsNullOrEmpty(inputstring))
{
var stream=newmemoryStream(Encoding.Unicode.GetBytes(inputstring??));
var outputStream=new MemoryStream();
压缩(流、输出流);
byte[]bytes=outputStream.ToArray();
}
返回“”;
}
公共静态无效压缩(内存流内流、内存流外流)
{
CoderPropID[]PROPID;
对象[]属性;
制备编码器(输出PROPID,输出属性);
SevenZip.Compression.LZMA.Encoder编码器=新的SevenZip.Compression.LZMA.Encoder();
编码器.SetCoderProperties(PROPID、属性);
编码器。WriteCodeProperties(超出流);
Int64 fileSize=inStream.Length;
对于(int i=0;i<8;i++)
{
outStream.WriteByte((字节)(文件大小>>(8*i));
}
编码器代码(流内,流外,-1,-1,空);
}
公共静态void PrepareEncoder(out CoderPropID[]PROPID,out object[]属性)
{
布尔状态方程=真;
Int32 dictionary=1此代码用于创建与javascript代码相同的字符串,包括LMZA设置:
public static string CompressLzma(string inputstring)
{
if (!string.IsNullOrEmpty(inputstring))
{
var stream = new MemoryStream(Encoding.UTF8.GetBytes(inputstring ?? ""));
var outputStream = new MemoryStream();
Compress(stream, outputStream);
byte[] bytes = outputStream.ToArray();
var result = string.Join(",", Array.ConvertAll(bytes, v => signedInt((int)v)));
return result;
}
return "";
}
public static void PrepareEncoder(out CoderPropID[] propIDs, out object[] properties)
{
bool eos = true;
Int32 dictionary = 1 << 16;
Int32 posStateBits = 2;
Int32 litContextBits = 3; // for normal files
// UInt32 litContextBits = 0; // for 32-bit data
Int32 litPosBits = 0;
// UInt32 litPosBits = 2; // for 32-bit data
Int32 algorithm = 2;
Int32 numFastBytes = 64;
string mf = "bt4";
propIDs = new CoderPropID[]
{
CoderPropID.DictionarySize,
CoderPropID.PosStateBits,
CoderPropID.LitContextBits,
CoderPropID.LitPosBits,
CoderPropID.Algorithm,
CoderPropID.NumFastBytes,
CoderPropID.MatchFinder,
CoderPropID.EndMarker
};
properties = new object[]
{
dictionary,
posStateBits,
litContextBits,
litPosBits,
algorithm,
numFastBytes,
mf,
eos
};
}
private static int signedInt(int unsignedInt)
{
return unsignedInt >= 128 ? Math.Abs(128 - unsignedInt) - 128 : unsignedInt;
}
public static void Compress(MemoryStream inStream, MemoryStream outStream)
{
CoderPropID[] propIDs;
object[] properties;
PrepareEncoder(out propIDs, out properties);
SevenZip.Compression.LZMA.Encoder encoder = new SevenZip.Compression.LZMA.Encoder();
encoder.SetCoderProperties(propIDs, properties);
encoder.WriteCoderProperties(outStream);
Int64 fileSize = inStream.Length;
for (int i = 0; i < 8; i++)
{
outStream.WriteByte((Byte)(fileSize >> (8 * i)));
}
encoder.Code(inStream, outStream, -1, -1, null);
}
publicstaticstringcompresslzma(stringinputstring)
{
如果(!string.IsNullOrEmpty(inputstring))
{
var stream=newmemoryStream(Encoding.UTF8.GetBytes(inputstring???);
var outputStream=new MemoryStream();
压缩(流、输出流);
byte[]bytes=outputStream.ToArray();
var result=string.Join(“,”,Array.ConvertAll(bytes,v=>signedInt((int)v));
返回结果;
}
返回“”;
}
公共静态void PrepareEncoder(out CoderPropID[]PROPID,out object[]属性)
{
布尔状态方程=真;
Int32 dictionary=1=128?Math.Abs(128-unsignedInt)-128:unsignedInt;
}
公共静态无效压缩(内存流内流、内存流外流)
{
CoderPropID[]PROPID;
对象[]属性;
制备编码器(输出PROPID,输出属性);
SevenZip.Compression.LZMA.Encoder编码器=新的SevenZip.Compression.LZMA.Encoder();
编码器.SetCoderProperties(PROPID、属性);
编码器。WriteCodeProperties(超出流);
Int64 fileSize=inStream.Length;
对于(int i=0;i<8;i++)
{
outStream.WriteByte((字节)(文件大小>>(8*i));
}
编码器代码(流内,流外,-1,-1,空);
}
尝试使用编码。UTF8
而不是编码。Unicode
UTF8确实如此,我假设javascript编码是UTF16,没有尝试UTF8编码,将所有字节转换为有符号整数后,输出完全相同
public static string CompressLzma(string inputstring)
{
if (!string.IsNullOrEmpty(inputstring))
{
var stream = new MemoryStream(Encoding.Unicode.GetBytes(inputstring ?? ""));
var outputStream = new MemoryStream();
Compress(stream, outputStream);
byte[] bytes = outputStream.ToArray();
}
return "";
}
public static void Compress(MemoryStream inStream, MemoryStream outStream)
{
CoderPropID[] propIDs;
object[] properties;
PrepareEncoder(out propIDs, out properties);
SevenZip.Compression.LZMA.Encoder encoder = new SevenZip.Compression.LZMA.Encoder();
encoder.SetCoderProperties(propIDs, properties);
encoder.WriteCoderProperties(outStream);
Int64 fileSize = inStream.Length;
for (int i = 0; i < 8; i++)
{
outStream.WriteByte((Byte)(fileSize >> (8 * i)));
}
encoder.Code(inStream, outStream, -1, -1, null);
}
public static void PrepareEncoder(out CoderPropID[] propIDs, out object[] properties)
{
bool eos = true;
Int32 dictionary = 1 << 16;
Int32 posStateBits = 2;
Int32 litContextBits = 3; // for normal files
// UInt32 litContextBits = 0; // for 32-bit data
Int32 litPosBits = 0;
// UInt32 litPosBits = 2; // for 32-bit data
Int32 algorithm = 2;
Int32 numFastBytes = 32;
string mf = "bt2";
propIDs = new CoderPropID[]
{
CoderPropID.DictionarySize,
CoderPropID.PosStateBits,
CoderPropID.LitContextBits,
CoderPropID.LitPosBits,
CoderPropID.Algorithm,
CoderPropID.NumFastBytes,
CoderPropID.MatchFinder,
CoderPropID.EndMarker
};
properties = new object[]
{
dictionary,
posStateBits,
litContextBits,
litPosBits,
algorithm,
numFastBytes,
mf,
eos
};
}
public static string CompressLzma(string inputstring)
{
if (!string.IsNullOrEmpty(inputstring))
{
var stream = new MemoryStream(Encoding.UTF8.GetBytes(inputstring ?? ""));
var outputStream = new MemoryStream();
Compress(stream, outputStream);
byte[] bytes = outputStream.ToArray();
var result = string.Join(",", Array.ConvertAll(bytes, v => signedInt((int)v)));
return result;
}
return "";
}
public static void PrepareEncoder(out CoderPropID[] propIDs, out object[] properties)
{
bool eos = true;
Int32 dictionary = 1 << 16;
Int32 posStateBits = 2;
Int32 litContextBits = 3; // for normal files
// UInt32 litContextBits = 0; // for 32-bit data
Int32 litPosBits = 0;
// UInt32 litPosBits = 2; // for 32-bit data
Int32 algorithm = 2;
Int32 numFastBytes = 64;
string mf = "bt4";
propIDs = new CoderPropID[]
{
CoderPropID.DictionarySize,
CoderPropID.PosStateBits,
CoderPropID.LitContextBits,
CoderPropID.LitPosBits,
CoderPropID.Algorithm,
CoderPropID.NumFastBytes,
CoderPropID.MatchFinder,
CoderPropID.EndMarker
};
properties = new object[]
{
dictionary,
posStateBits,
litContextBits,
litPosBits,
algorithm,
numFastBytes,
mf,
eos
};
}
private static int signedInt(int unsignedInt)
{
return unsignedInt >= 128 ? Math.Abs(128 - unsignedInt) - 128 : unsignedInt;
}
public static void Compress(MemoryStream inStream, MemoryStream outStream)
{
CoderPropID[] propIDs;
object[] properties;
PrepareEncoder(out propIDs, out properties);
SevenZip.Compression.LZMA.Encoder encoder = new SevenZip.Compression.LZMA.Encoder();
encoder.SetCoderProperties(propIDs, properties);
encoder.WriteCoderProperties(outStream);
Int64 fileSize = inStream.Length;
for (int i = 0; i < 8; i++)
{
outStream.WriteByte((Byte)(fileSize >> (8 * i)));
}
encoder.Code(inStream, outStream, -1, -1, null);
}