使用Winsock库发送GET HTTP请求时出现400错误的请求错误 [英] 400 bad request error when send a GET http request by using winsock library

问题描述

我正在尝试将GET请求发送到网络服务器(例如:www.coursera.org，...).但是sServer返回一个响应头:HTTP/1.1 400 bad request

I'm trying to send a GET request to a webserver(example: www.coursera.org,...). But sServer returns a response header: HTTP/1.1 400 bad request

我在C ++中使用Winsock，并建立了一个与服务器的套接字连接.然后，将GET请求发送到服务器.

I used Winsock in C++ and establish a socket connect to server. Then, send a GET request to server.

int main(void) {

    get_Website("www.coursera.org");

    cout << website_HTML;

    cout << "\n\nPress ANY key to close.\n\n";
    cin.ignore(); cin.get();


    return 0;
}


void get_Website(string url) 
{

    WSADATA wsaData;
    SOCKET Socket;
    SOCKADDR_IN SockAddr;
    int lineCount = 0;
    int rowCount = 0;
    struct hostent* localHost;
    string srequete;
    char* localIP;


    srequete = "GET / HTTP/1.0\r\n";
    srequete += "Host: www.coursera.org\r\n";
    srequete += "Connection: close\r\n\r\n";

    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
        cout << "WSAStartup failed.\n";
        system("pause");
        //return 1;
    }

    Socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    localHost = gethostbyname(url.c_str());
    localIP = inet_ntoa(*(struct in_addr *)*localHost->h_addr_list);
    SockAddr.sin_port = htons(443);
    SockAddr.sin_family = AF_INET;
    SockAddr.sin_addr.s_addr = inet_addr(localIP);

    if (connect(Socket, (SOCKADDR*)(&SockAddr), sizeof(SockAddr)) != 0) {
        cout << "Could not connect";
        system("pause");
        //return 1;
    }
    send(Socket, srequete.c_str(), strlen(srequete.c_str()), 0);

    int nDataLength;
    while ((nDataLength = recv(Socket, buffer, 10000, 0)) > 0) {
        int i = 0;
        while (buffer[i] >= 32 || buffer[i] == '\n' || buffer[i] == '\r') {
            website_HTML += buffer[i];
            i += 1;
        }
    }

    closesocket(Socket);
    WSACleanup();

}

问题似乎是错误的GET请求?

The problem seems to be GET request that is wrong?

推荐答案

他们无法解析您的请求，因为您试图将其发送到未加密的https端口(443).您可以尝试将其发送给http端口(80)，但是无论如何它们都会将您重定向到 https://coursera.org

They can't parse your request because you are trying to send it to https port (443) unencrypted. You can try to send it http port (80), but they will redirect you to https://coursera.org anyway.

这篇关于使用Winsock库发送GET HTTP请求时出现400错误的请求错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！