我一直在试图弄清楚为什么这不起作用。它正在下载文件并将其写入大小几乎正确的正确位置。但是文件打不开。我不知道原因。我已经嵌入了下面的代码。请帮我找出错误。
的大小outfile2.exe是3,188,642字节，的大小fjernsupport.exe是3,188,312。也许它包含一些来自 http 的标头？
这是源代码：
#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/1.0\n"
"Host: localhost\n"
"Connection: keep-alive\n"
"Cache-Control: no-cache\n"
"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\n"
"Pragma: no-cache\n"
"User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.64 Safari/537.31\n"
"Accept-Encoding: gzip,deflate,sdch\n"
"Accept-Language: en-GB,en;q=0.8,en-US;q=0.6,da;q=0.4\n"
"Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3\n\n";
sock_descriptor = socket(AF_INET, SOCK_STREAM, 0); // SOCK_STREAM = TCP, AF_INET = DOMAIN
if(sock_descriptor < 0){
std::cout << "Failed creating socket\n" << 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 = "\r\n\r\n";
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;
}
}