download file with c++
windows 下TCP通信，采用多线程，server和client可以自由的发送和接受消息。同时client可以进行文件的下载，纯c++代码
//client
#include//server
#includetellg() <
}
DownloadEnd("Server send all");
SendPacket(DOWNLOAD_END);
}
void ReceiveMsgJudge(string buf) {
long _type = 0;
memcpy(&_type, buf.c_str(), sizeof(long));
string data = buf.substr(sizeof(long), buf.size() - sizeof(long));
switch (_type) {
case MSG_TYPE::DOWNLOAD_START: {
std::cout<<"recv download start :\t"<<data <<std::endl;
DownloadStart(data);
break;
}
case MSG_TYPE::DOWNLOAD: {
break;
}
case MSG_TYPE::DOWNLOAD_END: {
DownloadEnd("recv client download end");
break;
}
case MSG_TYPE::DOWNLOAD_STOP: {
break;
}
case MSG_TYPE::DOWNLOAD_SURE: {
Downloading();
break;
}
default: {
std::cout << "test data:\t" << data << std::endl;
}
}
}
void RunServer() {
WSADATA wsaData;
WSAStartup(MAKEWORD(2, 2), &wsaData);
server_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
sockaddr_in sockAddr;
sockAddr.sin_family = AF_INET;
sockAddr.sin_port = htons(8888);
sockAddr.sin_addr.S_un.S_addr = INADDR_ANY;
//bind
if (::bind(server_socket, (sockaddr*)&sockAddr, sizeof(sockAddr)) == SOCKET_ERROR) {
cout << "Bind error" << endl;
printf("error=%d\n", WSAGetLastError());
WSACleanup();
return ;
}
//listen number max is 1
if (listen(server_socket, 1) == SOCKET_ERROR) {
cout << "Listen error" << endl;
WSACleanup();
return ;
}
//accept client
sockaddr_in client_sin;
int len = sizeof(client_sin);
client_socket = accept(server_socket, (sockaddr*)&client_sin, &len);
if (client_socket == INVALID_SOCKET) {
WSACleanup();
return;
}
else {
//std::cout<<"start recv :\t"<
//start recv
char recvBuf[MAX_BUF] = { 0 };
while (1) {
int num = recv(client_socket, recvBuf, MAX_BUF, 0);
if (num > 0) {
string data(recvBuf, num);
ReceiveMsgJudge(data);
}
else {
cout << "Client leave" << endl;
closesocket(client_socket);
client_socket = accept(server_socket, (sockaddr*)&client_sin, &len);
std::cout<<"have client accept :\t" <<std::endl;
}
}
}
}
void Run(){
string command;
while (1) {
cin >> command;
SendPacket(9, command);
}
}