我正在寻找最快的(股票市场应用,非常时间关键)解决方案,用于从 TIdTCPServer 传输大量加密的RawByteString数据(最多500条记录/秒)到 TIdTCPClient 。
最好的方法是什么?
提前致谢!
修改
在我的项目中,我需要使用n'软件库来加密字符串。最快的加密方法返回RawByteString。从理论上讲,我只应将CodePage设置为加密字符串并将其转换为UTF8编码,但我的所有尝试都失败了。
在我看来最合乎逻辑的是:
服务器:
var
rbs: RawByteString;
begin
rbs := EncryptString(AInput, DEFAULT_ENCRYPTION_KEY);
SetCodePage(rbs, 65001, true);
AContext.Connection.IOHandler.WriteLn(rbs, IndyTextEncoding_UTF8);
...
end;
客户端:
var
rbs: string;
Output: string;
begin
rbs := IdTCPClient1.IOHandler.ReadLn(IndyTextEncoding_UTF8);
Output := DecryptString(rbs, DEFAULT_ENCRYPTION_KEY);
...
end;
答案 0 :(得分:0)
将二进制加密的RawByteString
转换为UTF-8字符串是完全错误的,无论它有多快。使用Indy 10传输二进制数据的最佳方法是使用TIdBytes
或TStream
代替。 IOHandler
具有两者的读/写方法,例如:
var
rbs: RawByteString;
begin
rbs := EncryptString(AInput, DEFAULT_ENCRYPTION_KEY);
AContext.Connection.IOHandler.Write(Int32(Length(rbs)));
AContext.Connection.IOHandler.Write(RawToBytes(PAnsiChar(rbs)^, Length(rbs)));
...
end;
var
buf: TIdBytes;
rbs: RawByteString;
Output: string;
begin
IdTCPClient1.IOHandler.ReadBytes(buf, IdTCPClient1.IOHandler.ReadInt32);
SetLength(rbs, Length(buf));
BytesToRaw(buf, PAnsiChar(rbs)^, Length(rbs));
Output := DecryptString(rbs, DEFAULT_ENCRYPTION_KEY);
...
end;
可替换地:
var
rbs: RawByteString;
strm: TIdMemoryBufferStream;
begin
rbs := EncryptString(AInput, DEFAULT_ENCRYPTION_KEY);
strm := TIdMemoryBufferStream.Create(PAnsiChar(rbs), Length(rbs));
try
AContext.Connection.IOHandler.LargeStream := False;
AContext.Connection.IOHandler.Write(strm, 0, True);
finally
strm.Free;
end;
...
end;
var
strm: TMemoryStream;
rbs: RawByteString;
Output: string;
begin
strm := TMemoryStream.Create;
try
IdTCPClient1.IOHandler.LargeStream := False;
IdTCPClient1.IOHandler.ReadStream(strm, -1, False);
SetLength(rbs, strm.Size);
Move(strm.Memory^, PAnsiChar(rbs)^, Length(rbs));
finally
strm.Free;
end;
{ alternatively:
SetLength(rbs, IdTCPClient1.IOHandler.ReadInt32);
strm := TIdMemoryBufferStream.Create(PAnsiChar(rbs), Length(rbs));
try
IdTCPClient1.IOHandler.ReadStream(strm, Length(rbs), False);
finally
strm.Free;
end;
}
Output := DecryptString(rbs, DEFAULT_ENCRYPTION_KEY);
...
end;