I can't open file using "ADODB.Stream"

Drunklord · 09-17-2012, 11:03 AM

Hi all! I can’t open hex file using this:

Js file

Code:

function GetFile(file_name) 
{
 var Content=null;
 var Stream; 
 try 
  {         
	  Stream = new ActiveXObject("ADODB.Stream") 
		Stream.Type = 16 //Hex         
		Stream.Open()         
		Stream.LoadFromFile(file_name)         
		Content = Stream.Read()         
		FileSize = Stream.Size         
		Stream.Close()         
		return Content;     
	}
	 catch(e) 
	  {         
		  alert(e.name + ': ' + e.message); 
		}
}

HTML file:

Code:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>
<head>
<title>District</title>
    <link rel="stylesheet" href="estilos.css" type="text/css" media="all">
    <style type="text/css"></style>

<script type="text/javascript" src=js/main_url_fails.js></script>
<script type="text/javascript"></script>
</head>
<body>
<script>

map_string=GetFile("maps/Temp.dat")

</script>

</body>

</html>

Error missage is: “Server’s Automatization can not create the object”

Can anyone help me, please?

sunfighter · 09-17-2012, 04:11 PM

ADO is a programming interface to access data in a database. That means it is a server side language. It is used in an ASP file.

Javascript is a client side language that works in a browser. It can not work server side nor can it read a database.

You can not run ADODB in a js file. You need ASP.

DaveyErwin · 09-17-2012, 06:30 PM

sorry

Old Pedant · 09-17-2012, 08:32 PM

Actually, you *CAN* run ADODB.Stream in JavaScript in the browser.

Provided:
(a) The browser is MSIE.
(b) The site the JavaScript comes from is marked as a Trusted Site
(c) The browser user says "OK" when asked if he/she wants to allow an unsafe ActiveX control in the browser.

All of which combines to mean that this is only a practical solution in an inTRAnet, typically an in-house system where all users are required to use MSIE and required to set browser permissions to allow all this.

Having said all that...

The code posted still won't work, because these 2 lines

Code:

		Stream.LoadFromFile(file_name)  
...
map_string=GetFile("maps/Temp.dat")

mean that you are trying to load the file "Temp.dat" from the directory "c:\windows\system32\maps" *ON THE USER'S MACHINE*. Which is surely not at all what you intended to do.

Drunklord · 09-18-2012, 12:53 PM

Is there any way to load a hex file then? I looked for it everywhere and can’t find the resolution.

Old Pedant · 09-18-2012, 11:35 PM

I give up. What is a "hex file"?

Are you a witch who wants to put a curse on someone? <grin/>

Old Pedant · 09-18-2012, 11:36 PM

Ahhh...went back to your first post...you mean a binary file. That is, a non-text file.

Sure, you can load it with HTTP GET using AJAX, for example. But what will you do with it once it is loaded?