problem of sending data with POST method [Archive]

BlackCode

May 9, 2005, 16:47

I have Apache2 server and PHP4 installed on my local computer for educational purposes.

I have the index2.php in my http server directory which prints the myvar variables value.

<?php

echo '<html><head><title></title></head><body><p>';
echo $_POST["myvar"];
echo '</p></body></html>';

?>

This thing is working fine when I post data from the index2.htm file,

<html><head><title>My PHP Query Page</title></head><body><br><br><center>

<form action="index2.php" method="post">
<p> <input type="text" name="myvar">
<input type="submit" value="Submit Query">
<input type="reset" value=" Reset ">
</p></form>
</center>

</body></html>

but it doesn't work when I try to post some data using HttpOpenRequest(...), HttpSendRequest(...) WinINET APIs.

#include <windows.h>
#include <wininet.h>

#include <iostream>

using std::cout;

void main()
{
HINTERNET hInternet = InternetOpen(
"MyAgent",
INTERNET_OPEN_TYPE_DIRECT,
NULL,
NULL,0);
cout<<"hInternet="<<(int)hInternet<<"\nGetLastError()="<<GetLastError()<<"\n\n";

HINTERNET hConnect = InternetConnect(
hInternet,
"127.0.0.1",
80,
NULL,
NULL,
INTERNET_SERVICE_HTTP,
0,
0);
cout<<"hConnect="<<(int)hConnect<<"\nGetLastError()="<<GetLastError()<<"\n\n";

LPCTSTR AcceptTypes[] = { TEXT("*/*"), NULL};
HINTERNET hRequest = HttpOpenRequest(
hConnect,
"POST",
"/index2.php",
NULL,
NULL,
AcceptTypes,
INTERNET_FLAG_KEEP_CONNECTION | INTERNET_FLAG_RELOAD | INTERNET_FLAG_PRAGMA_NOCACHE,
0);
cout<<"hRequest="<<(int)hRequest<<"\nGetLastError()="<<GetLastError()<<"\n\n";

char optData[] = "?myvar=31";

BOOL retRes = HttpSendRequest(
hRequest,
0,
0,
optData,
lstrlen(optData)
);
cout<<"retRes="<<(int)retRes<<"\nGetLastError()="<<GetLastError()<<"\n\n";

auto char buffer[4096];
auto DWORD uLong;

if(InternetReadFile(hRequest,buffer,4096,&uLong) == FALSE){
MessageBox(0,"ERROR InternetReadFile returns NULL","ERROR",0);
return;
}

for(UINT i=0;i<uLong;i++){
cout<<buffer[i];
}

Sleep(20000);
}

The server respond like it doesn't receive any data.

<html><head><title></title></head><body><p><br>
<b>Warning</b>: Undefined index: myvar in <b>D:\!!HTTP!!\WWW\index2.php</b> on line <b>4</b><br>
</p></body></html>

I posted the optData string with the InternetSendRequest(...)

optData[] = "?myvar=31";

is it right ?
what I made wrong ?