[SinGuLaRiTy] 博客微端搭建计划

Posted 2020-10-28 singularity2001

 1 #include<iostream>  
 2 #include <WINSOCK2.H>  
 3 #pragma comment(lib,"ws2_32.lib")  
 4 #define LEN 1024    //接收数据的大小  
 5 using namespace std;  
 6   
 7   
 8 int main()  
 9 {  
10     //加载套接字库  
11     WORD wVersionRequested;  
12     WSADATA wsaData;  
13     int err;  
14       
15     wVersionRequested = MAKEWORD( 1, 1 );    //初始化Socket动态连接库,请求1.1版本的winsocket库  
16       
17     err = WSAStartup( wVersionRequested, &wsaData );  
18     if ( err != 0 ) {  
19         return 0;  
20     }  
21   
22     if ( LOBYTE( wsaData.wVersion ) != 1 ||   //判断请求的winsocket是不是1.1的版本  
23         HIBYTE( wsaData.wVersion ) != 1 ) {  
24         WSACleanup( );          //清盘  
25         return 0;                   //终止对winsocket使用  
26     }  
27     //WSADATA ws;  
28     //WSAStartup(MAKEWORD(2,2),&ws);//  
29     char http[60] = "www.google.com";           //访问谷歌网页  
30     SOCKET sock = socket(AF_INET,SOCK_STREAM,0);//建立socket  
31     if (sock == INVALID_SOCKET)  
32     {  
33         cout<<"建立访问socket套接字失败!"<<endl;  
34         return 0;  
35     }  
36     sockaddr_in hostadd;  
37     hostent* host = gethostbyname(http);//取得主机的IP地址  
38     if(host==NULL)  
39     {  
40         cout<<"主机处于没有联网状态;"<<endl;  
41         return 0;  
42     }  
43     cout<<"主机处于联网状态，现在可以进行通信!"<<endl;  
44     memcpy(&hostadd,host->h_addr,sizeof(hostadd));//将返回的IP信息Copy到地址结构  
45     hostadd.sin_family = AF_INET;  
46     hostadd.sin_port = htons(80);  
47       
48       
49     char buf[LEN]="GET / HTTP/1.1\r\nHost: ";//构造Http请求数据包  
50     strcat(buf,inet_ntoa(hostadd.sin_addr));  
51     strcat(buf," \r\nContent-Length: 10\r\n\r\n");  
52     strcat(buf,"Connection:close");  
53       
54       
55     int time = 1000;    //超时时间  
56     setsockopt(sock,SOL_SOCKET,SO_RCVTIMEO,(char*)&time,sizeof(time));  
57       
58       
59     if (connect(sock,(sockaddr*)&hostadd,sizeof(hostadd)) == SOCKET_ERROR)//连接请求  
60     {  
61         cout<<"与网页建立连接失败!"<<endl;  
62         return 0;  
63     }  
64     if (SOCKET_ERROR == send(sock,buf,strlen(buf)+1,0))//发送构造好的Http请求包  
65     {  
66         cout<<"发送数据包失败!"<<endl;  
67         return 0;  
68     }  
69     memset(buf,0,LEN);  
70     recv(sock,buf,LEN,0);               //接收返回的数据  
71     cout<<"从网页中获取的数据为:"<<buf;  
72     closesocket(sock);  
73     WSACleanup();  
74 return 0;  
75 }  

 

链接：https://blog.csdn.net/jpday/article/details/9329185