c++下载函数

我一直在想为什么这不起作用。它下载文件并将其写入，以几乎正确的大小写入正确的位置。但是文件打不开。我不知道原因。我嵌入了下面的代码。请帮我找出错误。

outfile2.exe大小为3,188,642字节，fjernsupport.exe大小为3,188,312字节。也许它包含一些来自http的报头?

源代码如下:

#include <fstream>
#include <stdio.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include <string>
#include <sstream>
#include <iostream>
#include <map>
using namespace std;
int main(){
    int sock_descriptor; // integer number to access socket
    struct sockaddr_in serv_addr; // uses predefined sockaddr_in struct
    struct hostent *server; // from netdb.h to determine host name out of ip address
    char recvBuff[1024];  // Receiving buffer 
    char hostname[] = "localhost";
    char req[] = "GET /vikar/local/fjernsupport.exe HTTP/1.0n"
                    "Host: localhostn"
                    "Connection: keep-aliven"
                    "Cache-Control: no-cachen"
                    "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8n"
                    "Pragma: no-cachen"
                    "User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.64 Safari/537.31n"
                    "Accept-Encoding: gzip,deflate,sdchn"
                    "Accept-Language: en-GB,en;q=0.8,en-US;q=0.6,da;q=0.4n"
                    "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3nn";
    sock_descriptor = socket(AF_INET, SOCK_STREAM, 0); // SOCK_STREAM = TCP, AF_INET = DOMAIN
    if(sock_descriptor < 0){
        std::cout << "Failed creating socketn" << std::endl;
    }
    bzero((char *)&serv_addr, sizeof(serv_addr));
    server = gethostbyname(hostname);
    if(server==NULL){
        std::cout << "Failed to find server name" << std::endl;
        return 0;
    }
    serv_addr.sin_family = AF_INET;
    memcpy((char *) &(serv_addr.sin_addr.s_addr), (char *)(server->h_addr), server->h_length);
    serv_addr.sin_port = htons(80);  // Ensures integer interpretion is correct
    if(connect(sock_descriptor, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0){
        std::cout << "Failed to connect to server" << std::endl;
    }else{
        std::cout << "Succesfully connected" << std::endl;
    }
    cout << "SEND: " << req << endl;
    write(sock_descriptor, req, sizeof(req));
    bool isFile = false;
    ofstream outFile;
    outFile.open("outfile2.exe", ios::out | ios::binary);
    int bytes;
    const char* phrase = "rnrn";

    while(true){
        memset(recvBuff, 0, 1024);
        if((bytes = read(sock_descriptor, recvBuff, sizeof(recvBuff)-1)) > 0){
                    if(isFile){
                        outFile.write(recvBuff, bytes);
                    }else{
                        char *remain = strstr(recvBuff, phrase);
                        outFile.write(remain, bytes);
                        isFile = true;
                    }
        }else{
            outFile.close();
            cout << "Returning here";
            return 0;
        }

    }
    outFile.close();
    cout << "finished";
    return 0;
}

int findWord(std::string text, std::string word){
    if(std::string::npos != text.find(word)){
        return 1;
    }else{
        return 0;
    }
}