如何从vc ++项目中查询http请求

如何解决如何从vc ++项目中查询http请求

| 我正在编写一个示例程序来从某个站点获取文件。 但它是在回复我文件未找到错误，我不知道如何制作http标头。 任何人都可以帮助我编写http标头。 而且我试图以这种方式打印ip（printf（\“％s \\ n \”，ptr-> ai_addr-> sa_data）;）  但没有得到如何打印IP地址？，我做对了吗？ 我的代码是：-

#define WIN32_LEAN_AND_MEAN

#include <windows.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#include <stdlib.h>
#include <stdio.h>


#define WIN32_LEAN_AND_MEAN

#include <windows.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#include <stdlib.h>
#include <stdio.h>


// Need to link with Ws2_32.lib,Mswsock.lib,and Advapi32.lib
#pragma comment (lib,\"Ws2_32.lib\")
#pragma comment (lib,\"Mswsock.lib\")
#pragma comment (lib,\"AdvApi32.lib\")


#define DEFAULT_BUFLEN 512
#define DEFAULT_PORT \"80\"

int __cdecl main(int argc,char **argv) 
{
    WSADATA wsaData;
    SOCKET ConnectSocket = INVALID_SOCKET;
    struct addrinfo *result = NULL,*ptr = NULL,hints;
    char *sendbuf = \"GET / HTTP/1.1[CRLF] Host: www.espncricinfo.com[CRLF]Connection: close[CRLF]User-Agent: Web-sniffer/1.0.37 (+http://web-sniffer.net/)[CRLF]Accept-Encoding: gzip[CRLF]Accept-Charset: ISO-8859-1,UTF-8;q=0.7,*;q=0.7[CRLF]Cache-Control: no-cache[CRLF]Accept-Language: de,en;q=0.7,en-us;q=0.3 \\r\\n\";
    char buff[DEFAULT_BUFLEN],recvbuf[512]; 
    int iResult;
    int recvbuflen = DEFAULT_BUFLEN;

    // Validate the parameters
    if (argc != 1) {
        printf(\"usage: %s server-name\\n\",argv[0]);
        return 1;
    }

    // Initialize Winsock
    iResult = WSAStartup(MAKEWORD(2,2),&wsaData);
    if (iResult != 0) {
        printf(\"WSAStartup failed with error: %d\\n\",iResult);
        return 1;
    }

    ZeroMemory( &hints,sizeof(hints) );
    hints.ai_family = AF_INET;
    hints.ai_socktype = SOCK_STREAM;
    hints.ai_protocol = IPPROTO_TCP;
    // Resolve the server address and port
    iResult = getaddrinfo(\"122.169.255.9\",DEFAULT_PORT,&hints,&result);
    if ( iResult != 0 ) {
        printf(\"getaddrinfo failed with error: %d\\n\",iResult);
        WSACleanup();
        return 1;
    }

    // Attempt to connect to an address until one succeeds
    for(ptr=result; ptr != NULL ;ptr=ptr->ai_next) {

        // Create a SOCKET for connecting to server

        ConnectSocket = socket(ptr->ai_family,ptr->ai_socktype,ptr->ai_protocol);
        printf(\"inside loop %s \",ptr->ai_addr->sa_data);
        if (ConnectSocket == INVALID_SOCKET) {
            printf(\"socket failed with error: %ld\\n\",WSAGetLastError());
            WSACleanup();
            return 1;
        }

        // Connect to server.
        iResult = connect(ConnectSocket,ptr->ai_addr,(int)ptr->ai_addrlen);
        printf(\"%d\\n\",ptr->ai_addrlen);
//      printf(\"%s\\n\",ptr->ai_addr->sa_family);
        printf(\"%s\\n\",ptr->ai_addr->sa_data);

        if (iResult == SOCKET_ERROR) {
            printf(\"socket error\\n\");
            printf(\"failed with error: %d\\n\",WSAGetLastError());
            closesocket(ConnectSocket);
            ConnectSocket = INVALID_SOCKET;
            continue;
        }
        break;
    }

    freeaddrinfo(result);

    if (ConnectSocket == INVALID_SOCKET) {
        printf(\"Unable to connect to server!\\n\");
        WSACleanup();
        return 1;
    }
    // Send an initial buffer
    char filepath[]=\"pakistan/content/current/story/517271.html\";
    sprintf(buff,\"GET %s\\r\\n\",filepath);
    iResult = send( ConnectSocket,buff,(int)strlen(buff),0 );
    if (iResult == SOCKET_ERROR)
    {
        printf(\"send failed with error: %d\\n\",WSAGetLastError());
        closesocket(ConnectSocket);
        WSACleanup();
        return 1;
    }

    printf(\"Bytes Sent: %ld\\n\",iResult);

    // shutdown the connection since no more data will be sent
    iResult = shutdown(ConnectSocket,SD_SEND);
    if (iResult == SOCKET_ERROR) {
        printf(\"shutdown failed with error: %d\\n\",WSAGetLastError());
        closesocket(ConnectSocket);
        WSACleanup();
        return 1;
    } 

    do 
    {
        iResult = recv(ConnectSocket,recvbuf,recvbuflen,0);
        //if ( iResult > 0 ) printf(\"Bytes received: %d\\n\",iResult);
         if ( iResult > 0 )
         {
            printf(\"Bytes received: %d\\n\",iResult);
            printf(\"%s\",recvbuf);
         }
         else if ( iResult == 0 )
            printf(\"Connection closed\\n\");
        else
            printf(\"recv failed with error: %d\\n\",WSAGetLastError()); 

    } while( iResult>0 );

    // cleanup
    closesocket(ConnectSocket);
    WSACleanup();

    return 0;
}

    

解决方法

        如果您要使用Microsoft Windows函数，则WinInet中的HTTP函数要容易得多。请参阅HttpOpenRequest / HttpSendRequest / HttpQueryInfo / InternetReadFile     ,        如果您正在获取“找不到文件”，那是因为您正在请求找不到文件。 也许尝试以斜杠开头的

\"/pakistan/content/current/story/517271.html\"

。 您的

HTTP

协议说明符在哪里？ 写：

GET path HTTP/1.0

（1.0是因为您可能不想弄乱虚拟主机；如果需要，则是1.1） 为何在尝试从套接字读取之前关闭套接字...？我知道您只关闭了\“ send \”管道，但这仍然很奇怪。 也许您应该使用预先建立的库来为您执行此操作。 位于http://122.169.255.9/的Web服务器似乎无法正常工作。也许首先使用http://www.google.com之类的知名服务器进行测试。     ,        如果您不想重新发明轮子，请使用libcurl之类的库。     ,        除了Tomalak Geret'kal 您将要使用HTTP / 1.0，除非您要检查分块的内容，否则HTTP 1.1会给您带来更多麻烦。 安装Wireshark并记录请求。您会发现哪里出了问题。 我不知道[CRLF]被自动更改为\\ r \\ n