sslStream.Read问题：读取的所有字节均为0
TcpClient client = new TcpClient("69.147.112.160", 443);
SslStream sslStream = new SslStream(client.GetStream(),false,
ValidateServerCertificate,null);
try
{
sslStream.AuthenticateAsClient("mail.yahoo.com");
}
catch (AuthenticationException e)
{
return;
}
byte[] messsage = Encoding.UTF8.GetBytes(".<EOF>");
sslStream.Write(messsage);
sslStream.Flush();
byte[] buffer = new byte[4096];
int bytes2 = -1;
do
{
/**************************************************
*** JUST A LINE BELOW ALL buffer BYTES ARE ZERO!**
*************************************************/
bytes2 = sslStream.Read(buffer, 0, 4096);
m_sockClient.Send(buffer, bytes2, 0);
} while (bytes != 0);
TcpClient client = new TcpClient("69.147.112.160", 443);
SslStream sslStream = new SslStream(client.GetStream(),false,
ValidateServerCertificate,null);
try
{
sslStream.AuthenticateAsClient("mail.yahoo.com");
}
catch (AuthenticationException e)
{
return;
}
byte[] messsage = Encoding.UTF8.GetBytes(".<EOF>");
sslStream.Write(messsage);
sslStream.Flush();
byte[] buffer = new byte[4096];
int bytes2 = -1;
do
{
/**************************************************
*** JUST A LINE BELOW ALL buffer BYTES ARE ZERO!**
*************************************************/
bytes2 = sslStream.Read(buffer, 0, 4096);
m_sockClient.Send(buffer, bytes2, 0);
} while (bytes != 0);
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buffer中尚未被Read调用填充的所有字节都将为零；这是标准的 C#。如果其中的最后一个字节为零，则只有两件事可能导致：
Read不读取任何内容（在这种情况下它返回0——你绝对应该检查返回值）All bytes in
bufferthat have not been filled in by theReadcall will be zero; this is standard C#.If every last one byte in there is zero, only two things can be responsible:
Readdoes not read anything (in which case it returns0-- you should definitely be checking the return value)bytes2 = sslStream.Read(buffer, 0, 4096);将最多 4096 字节读取到buffer中，而不是正好 4096 字节。它会阻塞，直到至少读取一个字节并返回读取的字节数。因此，在方法调用之后，buffer将具有与方法调用之前相同的内容（例如，填充空值），除了第一个bytes2字节，即字节从服务器收到。bytes2 = sslStream.Read(buffer, 0, 4096);reads up to 4096 bytes intobuffer, not exactly 4096 bytes. It blocks until at least one byte is read and returns the number of bytes read. So after the method call,bufferwill have the same content as before the method call (e.g., filled with nulls), except for the firstbytes2bytes, which are the bytes received from the server.