Using AJAX to implement chat functions

Introduction: Want to chat with asynchronous JavaScript and XML (Ajax)? Do you want to pop up a dedicated, open source Web Chat feature to respond to system events and make you aware of what is going on, such as performance below the service guarantee level? DeveloperWorks's regular contributor, Judith Myerson, introduced the idea of a double-sided board (two-panel) Chat for system administrators so that they could exchange private messages on the one hand and broadcast messages to general users on the other. She also provides solutions for issues such as overload of chat servers, issues such as downloading Ajax Chat, changing configurations, and adding as many channels as possible.

Brief introduction

People who have used instant Messaging chat software may want to find a free, open source Web chat software in which you can use your own code to customize the look and feel of the chat and how it sends messages to the database on the server. With Ajax Chat, you can stop looking, Ajax Chat is an application implemented with JavaScript, PHP, and MySQL, published under the GNU Affero general public License.

There are two versions of Ajax Chat-Standalone and forum integrated. You can add or reduce channels at your own whim. As long as no existing resources are affected, there is no limit to the maximum number of chat channels within the hosted environment, and there is no cost to add channels (and users and databases).

With Ajax Chat, you can send private or broadcast messages, delete messages in chat, define open hours for chat, set length counters, and customize layouts with cascading Style Sheets (CSS) and template systems. Ajax Chat also has security to prevent code injection, SQL injection, Cross-site scripting attacks, session theft, and other attacks. Just make sure the system is able to provide a response to the chat vulnerabilities to prevent hackers from exploiting these vulnerabilities for attack.

Channel expectation list (wishlist)

One of these channels can be used as a dedicated channel for system and user administrators to send and receive real-time alarms of system status. For example, you can have this channel pop up after a system event, and then issue a warning sound and make a call to get your immediate attention after you decide that you are currently leaving the client. Here are some examples of system events:

System performance is lowered to the level of service assurance defined within the service level agreement (AGREEMENT,SLA)

Recommended tools for restoring performance to this service level

Progress status of performance recovery

Performance back to service to ensure that water usually

The length of performance below service level and where it occurs within the system

The expected manifest contains the second panel of the Administrator Chat feature to broadcast messages to the user, such as the status of the performance level or when the socket server needs to be shut down for maintenance and repairs, and when they can be restarted. When the system is working properly, developers and administrators can use this second panel to point to an industry-wide open source Ajax library.

To listen for chat messages, you must ensure that the chat client is able to establish a permanent connection to this socket server. Because, by default, only local clients (127.0.0.1,::1) can broadcast messages, you need to change the default settings to allow other clients (for example, your system management colleagues) to send broadcast messages.

First into SourceForge.net's Blueimp Ajax Chat. Here are a few file compression packs. The first file that should be downloaded and uncompressed is of course the main chat application file: ajax_chat-0.8.1.2.tar.gz.

These files will be automatically placed in the following folder: CSS, Flash, IMG, JS, lib, socket, sounds and SRC. Other files that need to be downloaded will integrate Ajax Chat with PhpBB2, PhpBB3, MyBB, PunBB, SMF, VBulletin, and other PHP community files.

Before uploading and installing a server-side chat file, you need to edit three configuration settings: Database, channel, and user. After uploading the files, create a database table, and then delete the installation script. In addition, MySQL must also be installed on the server.