infuze apache module user guide

WURFL InFuze Module for Apache: User Guide

This document is about the Apache server and how you, a developer or a system administrator, would install and configure the WURFL Module for Apache on Unix (Linux) systems.

Installing libwurfl

In order for the Module to work it is ESSENTIAL that the libwurfl library is installed on your system. libwurfl is provided in your Customer Vault/FileX.

If you have not already installed libwurfl, instructions can be found here. Release notes for each API can be found here.

Install WURFL Apache Module on Ubuntu

Run the following command to install the latest Apache software:

sudo apt-get update
sudo apt-get install apache2 apache2-threaded-dev

Download and install the WURFL Apache module deb package:

sudo dpkg -r apache-mod-wurfl
sudo dpkg -i mod_wurfl-

Install WURFL Apache Module on RedHat/Fedora/CentOS

Run the following command to install the latest Apache Cache software:

sudo yum update
sudo yum -y install openssl-devel
sudo yum -y install pcre httpd

Download and install the WURFL Apache module rpm package:

sudo rpm -e apache-mod-wurfl
sudo rpm -i mod_wurfl-

Install WURFL Apache Module on Mac OS X

WURFL Apache module for Mac OS X is distributed as a tar.gz package containing the library and the sample configuration file wurfl.conf.

Unpack it and copy in Apache modules folder (typically /usr/libexec/apache2)
wurfl.conf in Apache configuration folder (typically /private/etc/apache2/other)

Configuration Guide

Apache is configured by placing directives in plain text configuration files. The main configuration file is usually called httpd.conf and includes the WURFL Apache Module configuration file wurfl.conf.

The installation package will place a sample wurfl.conf file in /usr/share/wurfl folder.

The wurfl.conf contains a LoadModule directive and a <IfModule></IfModule> section including WURFL module configuration directives.

To activate WURFL Apache module you have to customize the <IfModule></IfModule> section of wurfl.conf file and copy it in the Apache modules configuration folder (whose path depends on which Linux/Mac OSX distribution and Apache version you are installing the module).

Below is an example snippet of the wurfl.conf <IfModule></IfModule> section for WURFL setup:

<IfModule wurfl_module>
    # -- WURFL root definition. User MUST specify this path in order to make WURFL engine correctly start.
    WurflRoot /usr/share/wurfl/

    # -- WURFL Updater allows seamless update of WURFL engine with new data downloaded from Scientiamobile.
    # -- Put your personal updater url taken from Scientiamobile customer Vault.
    # -- WURFL file should be either .zip or .xml.gz and match WurflRoot file type
    # -- Valid values for the updater check frequency (how often the updater checks for any new WURFL data file
    # -- to be downloaded and used by the engine) are DAILY,WEEKLY
    # -- Updater log file (wurfl-updater.log) may be found in "WurflRoot" folder. The folder and file must be
    # -- writable by Apache process
    #WurflUpdater DAILY

    # -- WURFL patches definition (as much as needed, patches will be applied in the same order as specified in this conf file)
    #WurflPatch /path/to/first/patch.xml

    # -- WURFL engine target: one of the following (default is WurflTargetPerformance)

    # -- WURFL UA priority: one of the following (default is WurflUserAgentPriorityOverrideSideloadedBrowserUserAgent)

    # -- WURFL cache: one of the following
    #WurflCacheLRU 10000
    #WurflCacheDoubleLRU 100000,30000

    # -- WURFL user requested capabilities (as an example, this is not a complete list)
    #WurflRequestCapability is_console
    #WurflRequestCapability is_tablet
    #WurflRequestCapability is_wireless_device

    # -- WURFL user requested virtual capabilities (as an example, this is not a complete list)
    # -- Since WURFL API version, virtual capabilities are no longer injected by default
    # -- and have to be explicitly specified.
    #WurflRequestCapability advertised_device_os
    #WurflRequestCapability is_android

    # -- WURFL user requested properties
    # -- Since WURFL API version, WURFL properties except "wurfl_id" are no longer injected by default
    # -- and have to be explicitly specified.
    #WurflRequestProperty  wurfl_root_id
    #WurflRequestProperty  wurfl_isdevroot
    #WurflRequestProperty  wurfl_useragent
    #WurflRequestProperty  wurfl_engine_target
    #WurflRequestProperty  wurfl_useragent_priority
    #WurflRequestProperty  wurfl_info
    #WurflRequestProperty  wurfl_api_version
    #WurflRequestProperty  wurfl_last_load_time
    #WurflRequestProperty  wurfl_normalized_useragent


Please refer to the directives guide that explains each element in detail (Table 1), their parameters, constraints, and default recommended settings.

Table 1:

Syntax Description Availability
WurflRoot <string> This defines the location (path) of the WURFL data file. 1.4
WurflUpdater <string> <string> Allows seamless update of WURFL engine with new data downloaded from Scientiamobile. It takes two parameters:
• the data url (taken from your personal Scientiamobile Vault account, choosing between two data file types: .zip or .xml.gz)
Take care that WurflRoot file type and WurflUpdater data url file types match so you may need to change the WurflRoot file type accordingly.
• the updater checking frequency (how often the updater checks for any new WURFL data file to be downloaded and used by the engine) which you can choose between DAILY and WEEKLY.
In order to let the Updater perform its activities both the WurflRoot folder and file must be writable by Apache process.
The wurfl-updater.log file in WurflRoot folder will contains details on Updater activity.
WurflPatch <string> This function to add one or more custom patch files to the WURFL repository. 1.4
You can choose between high-accuracy (WURFL_ENGINE_TARGET_HIGH_ACCURACY) or high-performance (WURFL_ENGINE_TARGET_HIGH_PERFORMANCE) targets. In High-Performance mode, desktop web browser detection is done programmatically without referencing the WURFL data. As a result, most desktop web browsers are returned as generic_web_browser WURFL ID for performance. If either High-Performance or High-Accuracy are not defined, High-Performance mode is enabled by default. 1.4
WurflCacheLRU <num>
WurflCacheDoubleLRU <num>,<num>
The caching strategies are also configurable. You can choose between NULL, LRU, or Double LRU cache mechanisms. The default is Double LRU, which is a two-cache strategy (one going from User-Agent to Device-Id, the other from Device-Id to Device). The default parameters are 30,000, 10,000 (maximum 30,000 elements for the User-Agent to device-id cache and maximum 10,000 elements for the device-id to device cache) and the values are in elements. The LRU cache comes with User-Agent to Device mapping only, and the NULL parameter will disable the cache mode. These parameters refer to the max capacity size of the cache itself in Kilobytes. For more information, please see LRU Cache Mechanism. 1.4
WurflRequestCapability <string> This function defines one or more WURFL Capabilities and/or WURFL Virtual Capabilities to be loaded in the memory run-time. Those WURFL capabilities/virtual capabilities will be loaded to Environment Variable for every HTTP requests. 1.4
WurflRequestProperty <string> Enables injection of WURFL Properties (see section WURFL Properties below) in the Environment Variable for every HTTP requests.
You can choose between these two options in order to decide the useragent priority to use. WurflUserAgentPriorityOverrideSideloadedBrowserUserAgent tells WURFL to use the sideloaded browser user agent for device detection, while WurflUserAgentPriorityUsePlainUserAgent tells WURFL to use the plain user agent instead. 1.5.2

Capabilities and Virtual Capabilities in WURFL Apache module

You can insert any number of WurflRequestCapability directives, specifying both capabilities and virtual capabilities. For the list of supported WURFL capabilities, see official website for list of WURFL Capabilities. As of release, there is no need to include the mandatory capabilities list in the conf file.

Warning: If you do not include any WurflRequestCapability directives in the config file, the Apache Module will load ALL WURFL capabilities found in the WURFL database. This scenario may be useful when used with a pre-filtered version of the WURFL database with limited sets of capabilities; however, we strongly recommend using the predefined list of capabilities stored in the config file. Please be aware that loading too many capabilities (e.g. over 500 capabilities) may cause missing environment variables due to overflow limits and performance level may be degraded.

WURFL Properties

The WURFL Apache module sets some useful convenience variables to retrieve information regarding the currently active WURFL configuration.
These variables are automatically calculated and are injected in HTTP requests if specified in a WurflRequestProperty command.
Please note that the wurfl_id variable is injected by default so you don't have to specify it in a WurflRequestProperty command.

WURFL Properties Table

Variable Name Contents Availability
wurfl_id Contains the device ID of the matched device. It is injected by default so you don't have to specify it in a wurfl_request_property command 1.4
wurfl_root_id Contains the device root ID of the matched device. 1.4
wurfl_isdevroot Tells if the matched device is a root device. Possible values are "TRUE" or "FALSE" 1.4
wurfl_useragent The original useragent coming with this particular web request 1.5.1
wurfl_api_version Contains a string representing the currently used Libwurfl API version 1.5.1
wurfl_engine_target Contains a string representing the currently set WURFL Engine Target. Possible values are "HIGH_ACCURACY", "HIGH_PERFORMANCE" or "INVALID" 1.5.1
wurfl_info A string containing information on the parsed wurfl.xml and its full path 1.5.1
wurfl_last_load_time Contains the UNIX timestamp of the last time WURFL has been loaded successfully. 1.5.1
wurfl_normalized_useragent The normalized useragent.
wurfl_useragent_priority The user agent priority used by WURFL. 1.5.2

Testing WURFL Apache Module

For every HTTP requests, the WURFL Apache Module will detect and push the device capabilities data to the Apache Environment. The WURFL variable names will be shown in uppercase and prefixed with WURFL_. For example, the brand_name capability will be shown as WURFL_BRAND_NAME.

To view results of WURFL capabilities, see the outputs of Apache Environment variables for each HTTP Requests. For example, use the following command on a PHP Script to show output of Apache Environment variables:


Instead of PHP, you can run the simple CGI script called that usually comes along with the Apache installs. Load the following GGI script to Apache environment:

print "Content-type: text/plain\n\nENVIRONMENT VARIABLES!\n\n";
print "$_ = '$ENV{ $_ }'\n" for sort keys %ENV;


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