Getting info from php script with C++ app(opposite of the code shown here)

[TedCopple]

I need a little help here.  I have a function currently that allows me to send data to a php script from my C++ application.  How can I do the opposite?

 

C++ Code below to send data to the php script:

void SendData()
{
    char* Navigate = new char[500];
    memset(( void* )Navigate, 0, 500);
            char* Version = "Version 1.0";
    sprintf(Navigate, "MYSITE.COM/GetData.php?v=%s",  Version);
    SendFunction(Navigate);	
}
DWORD SendFunction(char* link)
{
char* szURL = link;

    HINTERNET hSession;  
HINTERNET hRequest;
hSession = InternetOpen(                         // Make internet connection.
                  "Microsoft Internet Explorer",   // agent
                  INTERNET_OPEN_TYPE_PRECONFIG,    // access
                  NULL, NULL, 0);                  // defaults
      if(hSession)
  {
     hRequest = InternetOpenUrl(                 // Make connection to desired page.
             hSession,                        // session handle
             link,                             // URL to access
             NULL, 0, 0, 0); // defaults
  }
  if(hRequest)
  {
  bool bResult = HttpSendRequest(hRequest, NULL, 0, NULL, 0); 
  }
  InternetCloseHandle(hSession);
  return 0;
}

 

php script that receives the data from the C++ application:

<? 
$f=fopen('FILE','a');

fwrite($f,$_GET['v'] \n); 

fclose($f); 
?> 

This just simply sends the char* Version = "Version 1.0" text to the php script witch _GETs it and writes it to a file.  Simple and impractical,  however I just wanted to get something rolling.  It works fine,  now I need to do the opposite.

 

I need to do exactly what this function does,  but flip it around!.  I want store a value in the php script,  and get that value with my C++ application,  and then log it out.  Any help here please!?

 

php script for what I want to do:

<?php
$dbhost = 'MyHost';
$dbuser = 'MyUserName';
$dbpass = 'MyPassword';

mysql_connect($dbhost, $dbuser, $dbpass) or die                      ('Error connecting to mysql');
$dbname = 'MyDB';
mysql_select_db($dbname);
$query = mysql_query("SELECT * FROM AppVersion");
while($row = mysql_fetch_array($query))
{
    $version = $row['Version Info'];
}
?>

I need to query the php script from my C++ application and retrieve the value of $version.  How can I setup the php script to export that value $version for the C++ app and use the WinInet funcs to retrieve it?

 

 

Note:  I am just trying to get a feel for how all of this works right now,  so none of this really has a practical use at the moment,  but is helping me progress in my overall goal,  so it will be very helpful to get this worked out.

[btherl]

It really depends on what you want to do.  The simplest way is to have your C++ script make another request, have your php script print out the data and then you look at the data you get back from the http request.

[TedCopple]

It really depends on what you want to do.  The simplest way is to have your C++ script make another request, have your php script print out the data and then you look at the data you get back from the http request.

 

Yea thats what I am trying to figure out how to do now.  I am trying to use InternetQueryDataAvailable and InternetReadFile to get the data I printed out with my php script.  I simply echoed the data that I want at the end of my .php script.  Here is what I have tried in C++ to get that data,  but is not working right:

 

 HINTERNET hSession;  
HINTERNET http;
HINTERNET hRequest;
bool bResult;
hSession = InternetOpen(                         // Make internet connection.
                  "Microsoft Internet Explorer",   // agent
                  INTERNET_OPEN_TYPE_PRECONFIG,    // access
                  NULL, NULL, 0);                  // defaults
      if(hSession)
  {
         http = InternetConnect(hSession, "MYSITE", INTERNET_DEFAULT_HTTP_PORT, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 0);
  }
  if(http)
  {
	  hRequest = HttpOpenRequest(http, "GET", "/Version.php", NULL, NULL, NULL, INTERNET_FLAG_RELOAD, 0);
  }
  if(hRequest)
  {
  bool bResult = HttpSendRequest(hRequest, NULL, 0, NULL, 0); 
  }
  if(bResult)
  {
  DWORD getquerydata;
  InternetQueryDataAvailable(hRequest, &getquerydata, 0, 0);
      DWORD dwBYTEsRead;
     
  LPCSTR buffer;
  buffer = new char[getquerydata];

  InternetReadFile(hRequest, (LPVOID)buffer, getquerydata, &dwBYTEsRead);
  }
  InternetCloseHandle(hSession);

[btherl]

I think you would be better off asking on a C++ forum. 

[TedCopple]

I think you would be better off asking on a C++ forum.

 

Hey,  thanks for trying to help.

 

I figured out the issue and have it working now.  It really helped out a lot re-creating the project in a console app to test with.  Using cout allowed to me see some things that my logs were not showing and I figured out why the buffer was not being filled with the correct data.