对于c++中的https请求，recv()未接收到数据

Question

我是套接字编程的新手。我正在尝试创建一个HTTPS网站的套接字。套接字已成功创建，我可以使用并发送标头进行连接...但是作为来自recv()的响应，我没有得到头部响应，也没有得到-1……程序在那里被阻止了.该站点已为https打开端口443 ...

#include<iostream>
#include<cstring>
#include<sys/socket.h>
#include<netdb.h>
using namespace std;
int main()
{
    int status;
    struct addrinfo hostInfo;
    struct addrinfo *hostList;
    memset(&hostInfo, 0, sizeof(hostInfo));
    hostInfo.ai_family = AF_INET;     
      hostInfo.ai_socktype = SOCK_STREAM;
    cout<<"Setting up the structs..."<<endl;
    status = getaddrinfo("academics.vit.ac.in", "https", &hostInfo, &hostList);
    if(status == 0)
    {
        cout<<"Success"<<endl;
        //cout<<hostList->ai_addr<<" "<<hostList->ai_socktype;
    }
    else
    {
        cout<<"Failled!";
    }
    int socketd;
    socketd = socket(hostList->ai_family, hostList->ai_socktype, hostList->ai_protocol);
    if(socketd == -1)
    {
        cout<<"Socket Error\n";
    }
    else
    {
        cout<<"Socket Success\n";
    }
    cout<<"Connecting\n";
    status = connect(socketd, hostList->ai_addr, hostList->ai_addrlen);
    if(status == 0)
    {
        cout<<"Success"<<endl;
        //cout<<hostList->ai_addr<<" "<<hostList->ai_socktype;
    }
    else
    {
        cout<<"Failled!";
    }
    cout<<"\nSending Header\n";
    char *msg = "GET /student/stud_login.asp HTTP/1.1\nhost: academics.vit.ac.in\nConnection: keep-alive\nCache-Control: max-age=0\nAccept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\nUser-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.52 Safari/537.36\nReferer: https://academics.vit.ac.in/\nAccept-Encoding: gzip,deflate,sdch\nAccept-Language: en-US,en;q=0.8\nCookie: ASPSESSIONIDAWRSBBBS=HJBNNABBBAIADHKAGEFLELJK; ASPSESSIONIDCUTRADBT=GNMNDGBBFDJHBLHABHDGCCOO; ASPSESSIONIDCUQTABAT=IOAAMMNBACANEDJFMGMLMNJA; ASPSESSIONIDAUSQBCAS=GBNFBCOBEKIOJJHFPMJNMJII\n\n";
cout<<"\n"<<msg<<endl;
    int len = strlen(msg);
    ssize_t msgSize;
    msgSize = send(socketd, msg, len, 0);
    if(msgSize == len)
    {
        cout<<"Sending Header Successful\n";
    }
    else
    {
        cout<<"Error Sending Header\n";
    }
    cout<<"Waiting to recieve data\n";
    char rmsg[1000];
    msgSize  = recv(socketd, rmsg, 10, 0);
    cout<<msgSize<<rmsg<<endl;
}

提前感谢:)

Answer 1

您应该将套接字设置为非阻塞(使用fnctl())，然后查看recv()返回的内容。也可以检查errno。这应该会为您提供更多信息。

参见man2recv()@ http://linux.die.net/man/2/recv。