ActiveSocket Toolkit Add network capabilities to any Windows or .NET application

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SNMP MIB Browser embedded in an HTML page using Javascript

ActiveSocket provides an easy-to-use development interface to a variety of IP protocols. By using ActiveSocket, you can very easily create or enhance applications with network features.

ActiveSocket features the following: DNS, FTP, HTTP, HTTPs, ICMP Ping, IP-to-Country, MSN, NTP, RSH, SCP, SFTP, SNMP v1/v2c (Get, GetNext, Set), SNMP Traps, SNMP MIB, SSH, TCP, Telnet, TFTP, UDP, Telnet, Wake-On-LAN and more.

SNMP MIB Browsing can be well integrated into HTML/Javascript pages. This document describes how ActiveSocket's SNMP MIB Browser can be integrated into HTML/Javascript.

A management information base (MIB) is a database used to manage the devices in a communications network. The database is hierarchical (tree-structured) and entries are addressed through object identifiers (OID's). A MIB should contain information on these commands and on the target objects (controllable entities or potential sources of status information) with a view to tuning the network transport to the current needs. Each type of object in a MIB database has a name, a syntax, and an encoding. The name is represented uniquely as an OID. An OID is an administratively assigned name. The administrative policies used for assigning names are discussed later in this memo.

Use ActiveSocket's 'SnmpMibBrowser' object to load a MIB database into memory and iterate over all objects and view all properties.

Step 1: Installation of ActiveSocket

When using HTML, there are two ways to install the ActiveSocket Toolkit on a client PC:

  • Automatically using HTML code;
  • Using the ActiveSocket Toolkit InstallShield installation.

Automatic installation using HTML code

You can install the ActiveSocket Toolkit automatically using the following HTML code on top of the HTML page:

<head>
  <object codeBase="http://www.activexperts.com/files/network-component/4.0/asocket.cab" classid="CLSID:4F986D6D-E04F-4BEE-B8C7-8252577CB282" lt;/object>
</head>

The ActiveSocket Toolkit will be installated automatically. The user will be asked to confirm the installation, because the DLL is coming from an untrusted site (www.activexperts.com). There are two ways to avoid prompting:

  • Add the ActiveX/COM location to the user's trusted sites. You can manage trusted manually (by using the Internet Explorer), through a logon script (by appyling the registry change from the logon script) or by using Active Directory Group Policies;
  • OR use a trusted location for the DLL. For instance your Intranet site, because most probably this site has already been added to the list of trusted sites for all users.

Manual installation using the ActiveSocket Toolkit installation procedure

On each client PC, download the ActiveSocket Toolkit from the ActiveXperts Download Site and start the installation. The installation guides you through the installation process.

Step 2: Create a new webpage

Create a new HTML script using your favorite editor. You can simply use notepad. However, a JavaScript editor is recommended, so you can browse through objects, objects properties and object functions. Add the following HTML code to the header section of your HTML code: 

<script type="text/javascript" >
</script>

You're now able to write a more advanced scripts to communicate using the ActiveSocket Toolkit.

Step 3: Create the ActiveSocket objects in JavaScript

To query an SNMP agent using JavaScript,you need to declare and create the following ActiveSocket object:

  • SnmpManager; The SNMP manager which allows you to communicate with the SNMP agent;

To create the ActiveSocket objects, add the following lines of codes on top of your JavaScript code (directly after the script tag) :

var objSnmpMib = new ActiveXObject ( "ActiveXperts.SnmpMibBrowser" );

There are many working samples included with the product. You can also find them on the ActiveXperts FTP site: ftp.activexperts-labs.com/samples/network-component.