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我目前正在編寫兩個項目，必須通過TCP彼此進行通信，客戶端必須使用System :: Net :: Sockets ，以及使用C++ winsock的服務器。很長一段時間以來，我一直使用這個可愛的函數來接收winsock中的文本，客戶端首先發送消息長度，然後發送消息。我不想用這個函數在服務器端改變任何東西，但是用.NET我會做任何事情。這是我的嘗試。客戶端/服務器與系統.NET套接字作爲客戶端和服務器上的C++ winsock
bool WinSockObject::receiveText(std::string &out)
{
//Create a temporary buffer to work with
char buf[4096];
//Stores textLength of incoming data
long textLength = 0;
//Receive the textLength that was sent first
_result = ::recv(
_socket, //socket we are receiving on
reinterpret_cast< char *>(&textLength), //the length of the incoming text
sizeof(textLength), //number of bytes
0 //no additional flags necessary
);
//Make sure we got the text length
if (_result == SOCKET_ERROR)
{
set_error("Unable to receive text length.");
return false;
}
//Convert the textLength back to host bytes
textLength = ::ntohl(textLength);
//Receive the actual message
_result = ::recv(
_socket, //socket we are receiving on
buf, //the input buffer
textLength, //text length
0 //no additional flags are necessary
);
//Make sure we got the actual message
if (_result == SOCKET_ERROR)
{
set_error("Unable to receive text.");
return false;
}
//Manually terminate the buffer
buf[textLength] = '\0';
//Copy the buffer to the output string
out.append(buf);
return true;
}
但我堅持先發送長度則消息
Socket^ s = gcnew Socket(
AddressFamily::InterNetwork,
SocketType::Stream,
ProtocolType::Tcp
);
s->Connect(server, port); //message to send
String^ howdy = "howdy";
int strLength = howdy->Length; //length of message
String^ length = strLength.ToString(); //convert it to String
//get the bytes
array<Byte>^msgLength = Encoding::ASCII->GetBytes(length);
//send the message length
int bytes = s->Send(msgLength);
//send the actual message
array<Byte>^msg = Encoding::ASCII->GetBytes(howdy);
bytes = s->Send(msg);