#Web archive archive

What is a web archive? - A video from the UK Web Archive YouTube Channel.Introductions to web archiving concepts:.Ever-evolving Web standards require continuous evolution of archiving tools to keep up with the changes in Web technologies to ensure reliable and meaningful capture and replay of archived web pages. Web archivists typically employ Web crawlers for automated capture due to the massive scale of the Web. class files can be loaded and executed by the JVM.) The /WEB-INF/classes directory contains the classes associated with the web application itself.ДЄny JAR files placed in the /WEB-INF/lib directory will also be placed on the ClassLoader's classpath.Web archiving is the process of collecting portions of the World Wide Web to ensure the information is preserved in an archive for future researchers, historians, and the public. (The classpath consists of a list of locations from which. The /WEB-INF/classes directory is on the ClassLoader's classpath. Preconfigured to connect to the appropriate SMTP server. Instances that may be used for sending electronic mail messages, HelloServlet mypackage.HelloServlet HelloServlet /HelloServlet The following sample web.xml file demonstrates the declaration and association of a servlet: This does not require stopping the web server if configured for runtime deployment.

#Web archive code

Each change to source code must be repackaged and deployed in development. Some consider web deployment using WAR files to be disadvantageous when minor changes to source code are required for dynamic environments.

In this way, developers can be certain that the WAR file tested and verified is exactly the same as that which is being promoted to production. The source code reads the property file to determine the target LDAP server. An external properties file would define the link with some thing like: The LDAP server in a production environment is ldaps://:636. For example, an LDAP server in a testing environment may be something like ldaps://:636.

All Java EE containers support WAR filesДЄssuming production environments do not promote a fix without sufficient testing prior to deployment, a WAR file has a distinct advantage when properties files are used to identify environment specific variables.

Easy identification of the version of the deployed application.

Easy testing and deployment of web applications.

The servlet container is responsible for providing this service. An example of this is a dependency on a mail session used to send email.

The web.xml file is also used to define context variables which can be referenced within the servlets and it is used to define environmental dependencies which the deployer is expected to set up. If the web application uses servlets, then the servlet container uses web.xml to ascertain to which servlet a URL request will be routed.

If the web application is only serving JSP files, the web.xml file is not strictly necessary.

The /WEB-INF directory in the WAR file contains a file named web.xml which defines the structure of the web application.

There are special files and directories within a WAR file: A WAR file may be digitally signed in the same way as a JAR file in order to allow others to determine where the source code came from.