需要帮助使用Wininet函数 [英] Need help using Wininet Functions

问题描述

我在 C ++ 中进行编程，并且要将文件上传到我已使用以下代码完成的Web服务器：

  #includestdafx.h
 #include< windows.h> 
 #include< wininet.h> 
 #pragma comment（lib，wininet）
 
 
 int _tmain（int argc，_TCHAR * argv []）
 {
 HINTERNET hInternet; 
 HINTERNET hFtp; 
 
 hInternet = InternetOpen（NULL，INTERNET_OPEN_TYPE_DIRECT，NULL，NULL，0）; 
 hFtp = InternetConnect（hInternet，Lftp.freetzi.com，INTERNET_DEFAULT_FTP_PORT，Lmyuser.freetzi.com，mypassword，INTERNET_SERVICE_FTP，0，0）; 
 
 FtpPutFile（hFtp，LC：\\deneme.txt，LcoolName.txt，FTP_TRANSFER_TYPE_BINARY，0）; 
 
 if（FtpPutFile（hFtp，LC：\\ desteme.txt，LcoolName.txt，FTP_TRANSFER_TYPE_BINARY，0））
 {
 MessageBox NULL，LUpload Successful。，LTitle，NULL）; 
} 
 else 
 {
 //这是我得到的消息... 
 MessageBox（NULL，L上传失败，L标题空值）; 
} 
 
 
 InternetCloseHandle（hFtp）; 
 InternetCloseHandle（hInternet）; 
 
 
 return 0; 
} 
  

但是由于这个程序将被很多人使用，如果目标文件已经存在，则重命名上传的文件 coolname.txt 的方式，上面的代码将覆盖旧数据并重写已使用的新数据2次或更多次，

我试过：

1. / public_html / log.txt+ std :: to_string（rand（））

2。函数： -

generateFileName（std :: string const& directory，
std :: string const& rootName，
std :: string const& extension）
{
std :: ostringstream results;
results.fill（'0'）;
results<<目录<< '/'<< rootName<< ' - '<< std :: setw（4）<< rand（）<<延期;
return result.str（）;
}

但是，我发现一种方法可以使用 FtpFindFirstFile 但我无法知道如何使用它。如果有人可以解释我更清楚或给一些例子，我真的appriciate。

参考： http://msdn.microsoft.com/en-us/library/windows/desktop/aa384180（v = vs.85）.aspx

$ b

 <$ c 
 $ c> #include< iostream> 
 #include< string> 
 #include< stdio.h> 
 #include< time.h> 
 
 //获取当前日期/时间，格式为YYYY-MM-DD.HH：mm：ss 
 const std :: string currentDateTime（）{
 time_t now = time （0）。 
 struct tm tstruct; 
 char buf [80]; 
 tstruct = * localtime（& now）; 
 //访问http://en.cppreference.com/w/cpp/chrono/c/strftime 
 //有关日期/时间格式的更多信息
 strftime（buf，sizeof（ ％Y-％m-％d。％X，& tstruct）; 
 
 return buf; 
} 
 
 int main（）{
 std :: cout< currentDateTime（）=< currentDateTime（）<< std :: endl; 
 getchar（）; //等待键盘输入
} 
  

定义一个文件名作为变量，

最后，您的文件名将是coolName_ 2014.06.25.07.08.08 .txt

我希望这会帮助你。

I am programming in C++ and I want to upload a file to my web server which i have already done using the following code:

#include "stdafx.h"
#include <windows.h>
#include <wininet.h>
#pragma comment(lib, "wininet")


int _tmain(int argc, _TCHAR* argv[])
{
HINTERNET hInternet;
HINTERNET hFtp;

hInternet = InternetOpen(NULL, INTERNET_OPEN_TYPE_DIRECT, NULL,NULL,0);
hFtp = InternetConnect(hInternet, L"ftp.freetzi.com", INTERNET_DEFAULT_FTP_PORT, L"myuser.freetzi.com", "mypassword", INTERNET_SERVICE_FTP, 0, 0);

FtpPutFile(hFtp, L"C:\\deneme.txt", L"coolName.txt", FTP_TRANSFER_TYPE_BINARY, 0);

if ( FtpPutFile(hFtp, L"C:\\deneme.txt", L"coolName.txt", FTP_TRANSFER_TYPE_BINARY, 0) )
{
    MessageBox(NULL, L"Upload Successful.", L"Title", NULL);
}
else
{
            //This is the message I get...
    MessageBox(NULL, L"Upload Failed.", L"Title", NULL);
}


InternetCloseHandle(hFtp);
InternetCloseHandle(hInternet);


return 0;
}

But as this program will be used by many people, I can't find a way to rename the uploaded file coolname.txt if the target file already exists, the code above will overwrite the old data and rewrite the new one of used 2 or more times,

I tried:

1. "/public_html/log.txt" + std::to_string(rand())

2 . A function :-

generateFileName( std::string const& directory, std::string const& rootName, std::string const& extension ) { std::ostringstream results; results.fill( '0' ); results << directory << '/' << rootName << '-' << std::setw(4) << rand() << extension; return results.str(); }

I however, found a way to accomplish this task using FtpFindFirstFile But I am unable to know how to use it. If someone could explain me more clear or give some examples, I would really appriciate.

Reference : http://msdn.microsoft.com/en-us/library/windows/desktop/aa384180(v=vs.85).aspx

解决方案

you can define the Output File name as variable.

#include <iostream>
#include <string>
#include <stdio.h>
#include <time.h>

// Get current date/time, format is YYYY-MM-DD.HH:mm:ss
const std::string currentDateTime() {
    time_t     now = time(0);
    struct tm  tstruct;
    char       buf[80];
    tstruct = *localtime(&now);
    // Visit http://en.cppreference.com/w/cpp/chrono/c/strftime
    // for more information about date/time format
    strftime(buf, sizeof(buf), "%Y-%m-%d.%X", &tstruct);

    return buf;
}

int main() {
    std::cout << "currentDateTime()=" << currentDateTime() << std::endl;
    getchar();  // wait for keyboard input
}

Define a file name as variable , in which we have to append current timestamp with filename.

Finally your file name will be "coolName_2014.06.25.07.08.08.txt"

I hope this will help you.

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