HTTP is an application layer protocol runs over TCP/IP.

The process repeats for the next request-response.

(client) The client-side program receives the query result and displays on the browser.

(server-to-client) The server-side program receives the query parameters, queries the database based on these parameters, and returns the query result to the client-side program.

This sends the query parameters to a server-side program.

(client-to-server) The user fills up the query criteria inside the form and submits the form.

(server-to-client) The HTTP server returns an HTML form (client-side program), which is loaded and rendered in the client's browser.

(client-to-server) A user, via a web browser (HTTP client), issues a URL request to an HTTP server to start a webapp.Server-Side Programs: Could be written in Java Servlet/JSP, ASP, PHP, Perl, Python, JavaScript, and others.Client-Side Programs: Could be written in HTML Form, JavaScript, and others.Database: E.g., Open-source MySQL, PostgreSQL, Apache Derby, mSQL, SQLite, OpenOffice's Base Commercial Oracle, IBM DB2, SAP SyBase, Microsoft SQL Server, Microsoft Access and others.HTTP Client (or Web Browser): E.g., Internet Explorer (MSIE), FireFox, Chrome, Safari, and others.HTTP Server: E.g., Apache HTTP Server, Apache Tomcat Server, Microsoft Internet Information Server (IIS), nginx, Google Web Server (GWS), and others.Examples of webapps are google, amazon, facebook and twitter.Ī webapp is typically a 3-tier (or multi-tier) client-server database application run over the Internet as illustrated in the diagram below. import Introduction Web Application (Webapp)Ī web application (or webapp), unlike standalone application, runs over the Internet. Tomcat 10 (under Jakarta EE 9) moves all the Tomcat 9 (under Java EE 8) packages in the javax.* namespace have moved to the jakarta.* namespace. (Advanced) Differences between Tomcat 10 and Tomcat 9 To install Tomcat 9, see ' Tomcat9 - Howto'. Take note that Tomcat 10 is not compatible with Tomcat 9 - Applications that run on Tomcat 9 and earlier will not run on Tomcat 10 without changes.

This installation and configuration guide is applicable to Tomcat 10. This practical can be completed in a 3-hour session.

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