InternetReadFile not getting entire file

Question

I have the following code to download some rss files from servers, but so far I'm just getting incomplete version of my rss file.(?) The code is as follows -

#include<iostream>
#include<conio.h>
#include<stdio.h>
#include<string>
#include<cstring>
#include<wininet.h> 
using namespace std;
const int _SIZE = 307200;
int WEB_GET_DATA(char* WEB_URL){
    HINTERNET WEB_CONNECT = InternetOpen("Default_User_Agent",INTERNET_OPEN_TYPE_PRECONFIG,NULL, NULL, 0);
    if(!WEB_CONNECT){
       cout<<"Connection Failed or Syntax error";
       return 0;
    }
    HINTERNET WEB_ADDRESS = InternetOpenUrl(WEB_CONNECT,WEB_URL, NULL, 0, INTERNET_FLAG_KEEP_CONNECTION, 0);
    if(!WEB_ADDRESS){
          cout<<"ERROR...\n";
          return 0;
    }
    char _DATA_RECIEVED[_SIZE];
    DWORD NO_BYTES_READ = 0;
    while(InternetReadFile(WEB_ADDRESS,_DATA_RECIEVED,_SIZE,&NO_BYTES_READ)&&(NO_BYTES_READ)){
        cout<<_DATA_RECIEVED;
    }
    InternetCloseHandle(WEB_ADDRESS);
    InternetCloseHandle(WEB_CONNECT);
    return 0;
}
int main(){
  WEB_GET_DATA("http://themoneyconverter.com/rss-feed/AED/rss.xml");
  getch();
  return 0;   
}

I'm getting only almost half of my file and not from start but my output is seeming to be starting from somewhere in between the file and then to it's end. So where I'm going wrong? I checked that my rss file is at least gonna be 30kb large. So I have given the _SIZE const 307200 (300kb) and still it is not working? Please help me.

Answer 1

Try this instead:

int WEB_GET_DATA(char* WEB_URL)
{
    HINTERNET WEB_CONNECT = InternetOpen("Default_User_Agent", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
    if (!WEB_CONNECT)
    {
       cout << "Connection Failed or Syntax error" << endl;
       return 0;
    }

    HINTERNET WEB_ADDRESS = InternetOpenUrl(WEB_CONNECT, WEB_URL, NULL, 0, INTERNET_FLAG_KEEP_CONNECTION, 0);
    if (!WEB_ADDRESS)
    {
        cout << "ERROR..." << endl;
        InternetCloseHandle(WEB_CONNECT);
        return 0;
    }

    DWORD DATA_SIZE = _SIZE;
    char *_DATA_RECIEVED = new char[DATA_SIZE];
    DWORD NO_BYTES_READ = 0;

    do
    { 
        if (InternetReadFile(WEB_ADDRESS, _DATA_RECIEVED, DATA_SIZE, &NO_BYTES_READ))
        { 
            if (NO_BYTES_READ == 0)
                break;

            cout << string(_DATA_RECIEVED, NO_BYTES_READ);
        }
        else
        {
            if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)
            {
                cout << "Read error" << endl;
                break;
            }

            delete[] _DATA_RECIEVED;
            DATA_SIZE += _SIZE;
            _DATA_RECIEVED = new char[DATA_SIZE];
        }
    }
    while (true);

    InternetCloseHandle(WEB_ADDRESS);
    InternetCloseHandle(WEB_CONNECT);
    return 0;
}