ISAPI Extension and Temperatur values

linutory · Aug 27th 2009

Hallo Team,

Firt of all let me inform you that I have a few experience C ++ programming.

So a part of my Training Study consist to read the temperature through an USB connected on PICOCOM1 and then showing this on a Website with ISAPI Extension.The order part is to tranfer this to another board.
So rigth now I have implemented my application and it works very good.
I have already configured the IIS Webserver and test my own dll without problem.
But I still have Probleme with ISAPI extension because I don't understand how I can pass the value I read on my application to the website.
Is it in the funkton writeClient?
I will be very thankfull for your advice.

Regards

fs-support_DK · Aug 27th 2009

Hello,

#1 you can read the usb sensor values within your ISAPI extension dll.
#2 Or you can implement a Dll that exports functions to read the sensor and call that from your ISAPI extension dll.
#3 Or you can export a function to write data to the web client from your ISAPI extension dll and call that from your application.

I think the best solution is the #1.

linutory · Sep 16th 2009

Hi Team,

Since then I wrote enough Dll by myself and I have understood how these work.My concern is I would like to write my Extensions as follow but it doesn't work(since one week).Because in this way it will be easy to read the COM Port after that is why I firstly implemented this and then I will introduced my module ReadCOMPort.

Have I forgotten any thing?

So please take a Look:

Hellofabio.def

Code

LIBRARY "Hellofabio"
EXPORTS
GetExtensionVersion
HttpExtensionProc
DllMain

and

Hellofabio.cpp

C

// Copyright 2009 Henry Corporation
//
// Module Name:Hello fabio
//
// Hellofabio.cpp
//
// Abstract:
//
// This module shows IIS 7 WriteClient buffering.
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <httpext.h>
#include <stdio.h>
void HtmlCreatePage (EXTENSION_CONTROL_BLOCK *pECB, LPCTSTR lpszTitle);
void WriteString (EXTENSION_CONTROL_BLOCK *pECB, LPCTSTR lpsz);
void HtmlEndPage (EXTENSION_CONTROL_BLOCK *pECB);
/*++
Routine Description:
This function DllMain() is the main initialization function
for
this DLL. It initializes local variables and prepares it to be
invoked
subsequently.
Arguments:
hinstDll Instance Handle of the DLL
fdwReason Reason why NT called this DLL
lpvReserved Reserved parameter for future use.
Return Value:
Returns TRUE is successful; otherwise FALSE is returned.
--*/
BOOL WINAPI DllMain(IN HINSTANCE hinstDll, IN DWORD fdwReason,IN LPVOID lpvContext OPTIONAL )
{
BOOL fReturn = TRUE;
return ( fReturn);
}
/*++
Routine Description:
This is the first function that is called when this ISAPI DLL
is loaded.
We should fill in the version information in the structure
passed in.
Arguments:
pVer - pointer to Server Extension Version Information
structure.
Returns:
TRUE for success and FALSE for failure.
On success the valid version information is stored in *pVer.
--*/
BOOL WINAPI GetExtensionVersion(HSE_VERSION_INFO *pVersion)
{
pVersion->dwExtensionVersion = MAKELONG(HSE_VERSION_MINOR,
HSE_VERSION_MAJOR);
lstrcpyn((LPWSTR)pVersion->lpszExtensionDesc,
(LPCWSTR)"Hello World Extension 1.1",
HSE_MAX_EXT_DLL_NAME_LEN);
return TRUE;
}
/*++
Routine Description:
This is the main function that is called for this ISAPI
Extension.
This function processes the request and sends out appropriate
response.
Arguments:
pecb - pointer to EXTENSION_CONTROL_BLOCK, which contains
most of the
required variables for the extension called. In
addition,
it contains the various callbacks as appropriate.
Returns:
HSE_STATUS code indicating the success/failure of this call.
--*/
DWORD WINAPI HttpExtensionProc( EXTENSION_CONTROL_BLOCK * pecb )
{
// Create a basic HTML page
HtmlCreatePage (pecb, TEXT("Hello World Reply"));
WriteString (pecb, TEXT("Hello, World!"));
WriteString (pecb, TEXT("\r\n"));
HtmlEndPage (pecb);
return HSE_STATUS_SUCCESS;
}
//
// HtmlCreatePage adds <HTML> and a title
//
void HtmlCreatePage (EXTENSION_CONTROL_BLOCK *pECB, LPCTSTR lpszTitle)
{
// IIS does this for us
//WriteString (pECB, TEXT("Content-Type: text/html\r\n"));
WriteString (pECB, TEXT("<HTML>\r\n\r\n"));
if (lpszTitle)
{
WriteString (pECB, TEXT("<HEAD><TITLE>"));
WriteString (pECB, lpszTitle);
WriteString (pECB, TEXT("</TITLE></HEAD>\r\n\r\n"));
}
WriteString (pECB, TEXT("<BODY>\r\n\r\n"));
}
//
// WriteString writes an ASCII string to the web browser
//
void WriteString (EXTENSION_CONTROL_BLOCK *pECB, LPCTSTR lpsz)
{
DWORD dwBytesWritten;
dwBytesWritten = lstrlen (lpsz);
pECB->WriteClient (pECB->ConnID, (PVOID) lpsz, &dwBytesWritten, 0);
}
//
// Announce the End of the page.
//
void HtmlEndPage (EXTENSION_CONTROL_BLOCK *pECB)
{
WriteString (pECB, TEXT("</BODY>\r\n\r\n"));
WriteString (pECB, TEXT("</HTML>\r\n"));
}

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I would be thankfull for any advices

Regards

rwalsh · Apr 1st 2011

Bumping this......

Did this issue ever get resolved???

No answer to his post!!!

What has he done wrong to stop his ISAPI dll working???

Cheers
Rick

fs-support_DK · Apr 4th 2011

Please find ND9_ISAPI.zip attached to this post.
Unzip the archive and open *.sln in Visual Studio. Build the project (or just use the Dll in PicoCOM2\release). Copy resulting Dll on the device and setup HTTPD to load extension. Try to use the extension by calling respective VROOT in your webbroweser.

Can you see the messgage: "Hello World From My First ISAPI =)" ?

rwalsh · Apr 4th 2011

Hi,

Yes this works ; )

Built it with VS2008 and dropped it into my VROOT.

Still cannot understand why??

Thanks
Rick

fs-support_DK · Apr 4th 2011

You wrote:

Quote

I have been testing the picoCOM2's webserver and cannot get it to serve any ISAPI dlls that I create with VS2010 either C++ or C#.

VS2010 does not support smart devices. You need to work with VS2005/2008!

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