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Socket, client socket, HTTP request
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#pragma comment(lib, "Ws2_32.lib") | |
#include <iostream> | |
#include <WinSock2.h> | |
#define BUF_SIZE 4096 | |
// | |
int main(int argc, char* argv[]) | |
{ | |
struct hostent *d; | |
struct sockaddr_in a; | |
SOCKET s; | |
int n; | |
char buffer[BUF_SIZE]; | |
char* request = "GET / HTTP/1.1\r\n\r\n"; | |
// | |
// 初始化 WinSock DLL Ws2_32.lib | |
// | |
WSAData wsadata; | |
WSAStartup(MAKEWORD(2,2), &wsadata); | |
memset((void*)&a, 0, sizeof(struct sockaddr_in)); | |
memset((void*)buffer, 0, sizeof(char)*BUF_SIZE); | |
// | |
// 自主機取得位址資料 | |
// | |
d = gethostbyname("www.google.com"); | |
if (d == NULL) | |
{ | |
std::cout << "Error: domain failure." << std::endl; | |
WSACleanup(); | |
return 0; | |
} | |
// | |
// 使用 IP v4 家族 | |
// | |
//a.sin_family = AF_INET; | |
a.sin_family = d->h_addrtype; | |
// | |
// 指定連接位址 | |
// | |
//a.sin_addr.S_un.S_addr = inet_addr("192.168.0.1"); | |
// | |
// 複製位址清單的第一個位址 | |
// | |
memcpy(&a.sin_addr, d->h_addr_list[0], d->h_length); | |
// | |
// 指定連接埠 | |
// | |
a.sin_port = htons(80); | |
// | |
// 建立一個 Socket | |
// | |
s = socket(a.sin_family, SOCK_STREAM, IPPROTO_TCP); | |
if (s == INVALID_SOCKET) | |
{ | |
std::cout << "Error: socket failure." << std::endl; | |
closesocket(s); | |
WSACleanup(); | |
return 0; | |
} | |
// | |
// 建立連線 | |
// | |
n = connect(s,(SOCKADDR*)&a, sizeof(struct sockaddr_in)); | |
std::cout << "Connecting " << inet_ntoa(a.sin_addr) << " ..." << std::endl << std::endl; | |
if (n != 0) | |
{ | |
std::cout << "Error: connect failure." << std::endl; | |
closesocket(s); | |
WSACleanup(); | |
return 0; | |
} | |
// | |
// 傳送 http 網頁請求 | |
// | |
n = send(s, request, strlen(request), 0); | |
if (n == SOCKET_ERROR) | |
{ | |
std::cout << "Error: send failure." << std::endl; | |
closesocket(s); | |
WSACleanup(); | |
return 0; | |
} | |
memset(buffer, 0, sizeof(char)*BUF_SIZE); | |
// | |
// 接收資料 | |
// | |
n = recv(s, buffer, sizeof(char)*BUF_SIZE, 0); | |
if (n != SOCKET_ERROR) | |
{ | |
std::cout << buffer << std::endl; | |
} | |
// | |
// 關閉 Socket | |
// | |
closesocket(s); | |
// | |
// 終止 WinSock DLL Ws2_32.lib | |
// | |
WSACleanup(); | |
// | |
// 暫停 | |
// | |
std::cout << "Press any key to continue ..."; | |
std::cin.get(); | |
return 0; | |
} |
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