这是我的:
WSADATA wsaData;
if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0) {
cout << "WSAStartup failed.\n";
system("pause");
}
SOCKET Socket=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
struct hostent *host;
host = gethostbyname("myserverip");
SOCKADDR_IN SockAddr;
SockAddr.sin_port=htons(80);
SockAddr.sin_family=AF_INET;
SockAddr.sin_addr.s_addr = *((unsigned long*)host->h_addr);
cout << "Connecting...\n";
if(connect(Socket,(SOCKADDR*)(&SockAddr),sizeof(SockAddr)) != 0){
cout << "Could not connect";
// system("pause");
}
cout << "Connected.\n";
send(Socket,"GET / HTTP/1.1\r\nHost: myserverip\r\nConnection: close\r\n\r\n", strlen("GET / HTTP/1.1\r\nHost: myserverip\r\nConnection: close\r\n\r\n"),0);
char buffer[10000];
int nDataLength;
while ((nDataLength = recv(Socket,buffer,10000,0)) > 0){
int i = 0;
while (buffer[i] >= 32 || buffer[i] == '\n' || buffer[i] == '\r') {
cout << buffer[i];
i += 1;
}
}
closesocket(Socket);
WSACleanup();
(此代码在循环内)。我想在我将使用变量发送的 header 中设置我的服务器主机。这实际上是我试图做的:
WSADATA wsaData;
if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
cout << "WSAStartup failed.\n";
}
SOCKET Socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
struct hostent *host;
host = gethostbyname(myhost);
SOCKADDR_IN SockAddr;
SockAddr.sin_port = htons(80);
SockAddr.sin_family = AF_INET;
SockAddr.sin_addr.s_addr = *((unsigned long*)host->h_addr);
if (connect(Socket, (SOCKADDR*)(&SockAddr), sizeof(SockAddr)) != 0) {
return 1;
}
send(Socket, "GET / HTTP/1.1\r\nHost: " + myhost + "\r\nConnection: close\r\n\r\n", strlen("GET / HTTP/1.1\r\nHost: " + myhost + "\r\nConnection: close\r\n\r\n"), 0);
char buffer[10000];
int nDataLength;
while ((nDataLength = recv(Socket, buffer, 10000, 0)) > 0) {
int i = 0;
while (buffer[i] >= 32 || buffer[i] == '\n' || buffer[i] == '\r') {
cout << buffer[i];
i += 1;
}
}
closesocket(Socket);
WSACleanup();
这段代码也在一个循环中。全局变量声明如下:
string myhost;
但我无法让它工作,尤其是在这一行:
send(Socket, "GET / HTTP/1.1\r\nHost: " + myhost + "\r\nConnection: close\r\n\r\n", strlen("GET / HTTP/1.1\r\nHost: " + myhost + "\r\nConnection: close\r\n\r\n"), 0);
我该如何解决这个问题?我是 C++ 的初学者。
最佳答案
使用 std::string
类型的变量,然后使用 std::string::c_str()
从中获取您可以在其中使用的 C 字符串对 send
的调用。
std::string str = "GET / HTTP/1.1\r\nHost: ";
str += myhost;
str += "\r\nConnection: close\r\n\r\n";
send(Socket, str.c_str(), str.size(), 0);
关于c++ - 通过传递参数进行字符串连接,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34234285/