如何在c++中通过post方法发送数据到php文件

How to send data via post method to a php file in c++?

本文关键字：数据 文件 php 方法 post c++      更新时间：2023-10-16

我是c++新手。最近，我试图通过post方法将一些数据传递到c++中的php文件。我已经尝试了MSDN发送函数的教程。代码如下:

#ifndef UNICODE
#define UNICODE
#endif
#define WIN32_LEAN_AND_MEAN
#include <winsock2.h>
#include <Ws2tcpip.h>
#include <stdio.h>
#include <conio.h>
// Link with ws2_32.lib
#pragma comment(lib, "Ws2_32.lib")
#define DEFAULT_BUFLEN 512
#define DEFAULT_PORT 27015
int main() {
    //----------------------
    // Declare and initialize variables.
    int iResult;
    WSADATA wsaData;
    struct hostent *host;
    SOCKET ConnectSocket = INVALID_SOCKET;
    struct sockaddr_in clientService;
    int recvbuflen = DEFAULT_BUFLEN;
    char *sendbuf = "Client: sending data test";
    char recvbuf[DEFAULT_BUFLEN] = "";
    //----------------------
    // Initialize Winsock
    iResult = WSAStartup(MAKEWORD(2,2), &wsaData);
    if (iResult != NO_ERROR) {
        wprintf(L"WSAStartup failed with error: %dn", iResult);
        return 1;
    }
    //----------------------
    // Create a SOCKET for connecting to server
    ConnectSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (ConnectSocket == INVALID_SOCKET) {
        wprintf(L"socket failed with error: %ldn", WSAGetLastError());
        WSACleanup();
        return 1;
    }
    //----------------------
    // The sockaddr_in structure specifies the address family,
    // IP address, and port of the server to be connected to.
    clientService.sin_family = AF_INET;
    clientService.sin_addr.s_addr = inet_addr( "127.0.0.1" );
    clientService.sin_port = htons( 80 );
    //----------------------
    // Connect to server.
    iResult = connect( ConnectSocket, (SOCKADDR*) &clientService, sizeof(clientService) );
    if (iResult == SOCKET_ERROR) {
        wprintf(L"connect failed with error: %dn", WSAGetLastError() );
        closesocket(ConnectSocket);
        WSACleanup();
        return 1;
  }
    //----------------------
    // Send an initial buffer
    iResult = send( ConnectSocket, sendbuf, (int)strlen(sendbuf), 0 );
    if (iResult == SOCKET_ERROR) {
        wprintf(L"send failed with error: %dn", WSAGetLastError());
        closesocket(ConnectSocket);
        WSACleanup();
        return 1;
    }
    printf("Bytes Sent: %dn", iResult);
    // shutdown the connection since no more data will be sent
    iResult = shutdown(ConnectSocket, SD_SEND);
    if (iResult == SOCKET_ERROR) {
        wprintf(L"shutdown failed with error: %dn", WSAGetLastError());
        closesocket(ConnectSocket);
        WSACleanup();
        return 1;
    }
    // Receive until the peer closes the connection
    do {
        iResult = recv(ConnectSocket, recvbuf, recvbuflen, 0);
        if ( iResult > 0 )
            wprintf(L"Bytes received: %dn", iResult);
        else if ( iResult == 0 )
            wprintf(L"Connection closedn");
        else
            wprintf(L"recv failed with error: %dn", WSAGetLastError());
    } while( iResult > 0 );

    // close the socket
    iResult = closesocket(ConnectSocket);
    if (iResult == SOCKET_ERROR) {
        wprintf(L"close failed with error: %dn", WSAGetLastError());
        WSACleanup();
        return 1;
    }
    WSACleanup();
    getch();
}

它发送数据到本地主机的主页，但我想发送数据在其他地方在本地主机(例如。像"localhost/测试/index . php")。如果我将代码从clientService.sin_addr.s_addr = inet_addr( "127.0.0.1" );更改为clientService.sin_addr.s_addr = inet_addr( "127.0.0.1/test/index.php" );，那么我将在exe文件中收到一些错误。但是程序编译成功了。

请给我一个解决方案。我现在该怎么办?

你采取了错误的方法。低级套接字层只允许您连接到特定的服务器(例如，您的本地http服务器运行在127.0.0.1上，监听端口80)并发送原始数据。您需要与该服务器进行HTTP会话才能真正执行您想要执行的操作。

我建议如果你是c++新手，你可以看看c++的许多第三方库之一，这些库允许你与HTTP服务器"对话HTTP"-例如libCurl

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