Set 'X-Frame-Options' in Liferay DXP to allow iframe access

You might have seen below error message in your browser console while including any of the Liferay page url in iframe.

Refused to display 'liferay-url' in a frame because it set 'X-Frame-Options' to 'sameorigin'.

Liferay does not allow access to any of its url using iframe if the request is coming from different domain. If the domain is same you will be able to access Liferay url using iframe.

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How to read portlet.properties file in Liferay DXP

In case if you are using portlet.properties file in Osgi module then using below snippet you can read property specified in portlet.properties file.

private static final Configuration _configuration = ConfigurationFactoryUtil
  .getConfiguration(ReportUtil.class.getClassLoader(), "portlet");

String fromEmailAddress = _configuration.get("report.form.emailaddress");

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How to include static resources (CSS/JS/Images) in Liferay OSGI module

As you know development approach has been completely changed with Liferay DXP. In older version of Liferay it was easy to include static resource like CSS , JS and Images as part of portlet but with Liferay DXP you have to do few additional changes to include them.

First of all you need to add webcontext path in your modules bnd file.

Web-ContextPath: /my-custom-portlet

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How to include custom portlet in theme - Liferay DXP

You can include out of box as well as custom portlet inside theme in Liferay dxp but way has been changed.

By default Liferay uses free marker templates for theme. You can use below snippet to include any custom portlet in theme.

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How to specify external jar dependency in Liferay DXP

While doing development in Liferay DXP your module may depends on external jar files . If required jar file is available in Liferay Nexus Repository then you can include them by using BND and Gradle file.

You can see Liferay nexus repository configured in your settings.gradle file under repository tag.

repositories {
maven {
url "https://cdn.lfrs.sl/repository.liferay.com/nexus/content/groups/public"
}
mavenLocal()
} 

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