从C++中的DLL内部下载文件

#include <windows.h>
#include <wininet.h>

// 下载文件函数
bool DownloadFile(const char* url, const char* savePath) {
    // 初始化WinINet
    HINTERNET hInternet = InternetOpenA("DownloadFile", INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);
    if (hInternet == NULL) {
        return false;
    }

    // 打开URL
    HINTERNET hUrl = InternetOpenUrlA(hInternet, url, NULL, 0, INTERNET_FLAG_RELOAD, 0);
    if (hUrl == NULL) {
        InternetCloseHandle(hInternet);
        return false;
    }

    // 创建保存文件
    HANDLE hFile = CreateFileA(savePath, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
    if (hFile == INVALID_HANDLE_VALUE) {
        InternetCloseHandle(hUrl);
        InternetCloseHandle(hInternet);
        return false;
    }

    // 下载文件
    char buffer[1024];
    DWORD bytesRead;
    while (InternetReadFile(hUrl, buffer, sizeof(buffer), &bytesRead) && bytesRead > 0) {
        DWORD bytesWritten;
        WriteFile(hFile, buffer, bytesRead, &bytesWritten, NULL);
    }

    // 关闭句柄
    CloseHandle(hFile);
    InternetCloseHandle(hUrl);
    InternetCloseHandle(hInternet);

    return true;
}