Device Detection module
The Device Detection module helps manage the complexity of mobile environments. The module detects requests originating from mobile devices using Mobile Detect, a lightweight Java library for detecting mobile devices. Coupled with Magnolia’s channels functionality, you can create channels that define the content and format served to a particular device class. There is no need to duplicate content. The same web content can be served to all devices in a format that is optimized for each device.
Installing with Maven
Maven is the easiest way to install the module. Add the following to your bundle:
<dependency> <groupId>info.magnolia.devdect</groupId> <artifactId>magnolia-module-device-detection</artifactId> <version>1.1</version> </dependency>
The default configuration detects mobile devices, splitting them into two groups: smartphones and tablets. You don’t need to change anything unless you want to detect other types of devices or other capabilities.
Device detection filter
is registered in the
filter chain at Configuration >
The purpose of this filter is to intercept the incoming request and
discover the capabilities of the device based on its
All devices identify themselves in the
User-Agent request header. Here
is an example what the header looks like when an iPhone 3GS requests the
Magnolia corporate home page. The header basically says ``I am an iPhone
running iOS 4.0.2 and the Safari browser''.
GET / HTTP/1.1 Host: www.magnolia-cms.com Connection: close User-Agent: Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0_2 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A400 Safari/6531.22.7
Device capability configuration
The Mobile Detect API provides the capabilities of mobile devices. It knows the specifications of several devices, broken down into groups. The API is built into the Device Detection module so no calls to outside services are needed during detection. Mobile Detect is a clone of Mobile ESP. We use the clone rather than the original because the clone provides a Maven artifact so we do not need to include the API code.
The API is registered in the Configuration app in
The device detection filter asks the API if the requesting device is a
smartphone or a tablet device. Once the device capabilities are
identified, the filter creates a
object in the request and sets the following basic properties:
trueif the device is a smartphone.
trueif the device is a tablet.
If you want to implement your own device detection mechanism, look at these Java classes for examples.
Implements the DeviceCapability
interface and provides information about the capabilities of the device.
Provides information about the device. All attributes are initially set to defined defaults.
Device channel configuration
In order to serve content to the device in an appropriate format, a channel is resolved next.
DeviceChannelResolver is registered in the
Configuration app (
/server/rendering/channelManagement/channels). This resolver resolves
the channel to use based on the
The channel is mapped to a variation. The variation consists of templates and a theme that optimizes the content for displaying on the device.