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DOC: add build indications for 51Degrees to README.

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Thomas Holmes 2015-05-29 15:21:42 +01:00 committed by Willy Tarreau
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@ -232,6 +232,91 @@ Sample configuration :
http-request set-header X-DeviceAtlas-Data %[req.fhdr(User-Agent),da-csv(primaryHardwareType,osName,osVersion,browserName,browserVersion)]
1.2) 51Degrees Device Detection
-------------------------------
You can also include 51Degrees for inbuilt device detection enabling attributes
such as screen size (physical & pixels), supported input methods, release date,
hardware vendor and model, browser information, and device price among many
others. Such information can be used to improve the user experience of a web
site by tailoring the page content, layout and business processes to the
precise characteristics of the device. Such customisations improve profit by
making it easier for customers to get to the information or services they
need. Theses attributes of the device making a web request can be added to HTTP
headers as configurable parameters.
In order to enable 51Degrees get the 51Degrees source code
(https://github.com/51Degreesmobi/51Degrees-C) and then run make with
USE_51DEGREES and 51DEGREES_INC and 51DEGREES_SRC set. Make sure to replace
'51D_REPO_PATH' with the path to the 51Degrees repository.
51Degrees provide 2 different detection algorithms.
1. Pattern - balances main memory usage and CPU.
2. Trie - a very high performance detection solution which uses more main
memory than Pattern.
To make with 51Degrees Pattern algorithm use the following command line.
$ make TARGET=linux26 USE_51DEGREES=1 51DEGREES_INC='51D_REPO_PATH'/src/pattern 51DEGREES_LIB='51D_REPO_PATH'/src/pattern
To use the 51Degrees Trie algorithm use the following command line.
$ make TARGET=linux26 USE_51DEGREES=1 51DEGREES_INC='51D_REPO_PATH'/src/trie 51DEGREES_LIB='51D_REPO_PATH'/src/trie
A data file containing information about devices, browsers, operating systems
and their associated signatures is then needed. 51Degrees provide a free
database with Github repo for this purpose. These free data files are located
in '51D_REPO_PATH'/data with the extensions .dat for Pattern data and .trie for
Trie data.
The configuration file needs to set the following parameters:
51degrees-data-file path to the pattern or trie data file
51degrees-property-name-list list of 51Degrees properties to detect
51degrees-property-seperator seperator to use between values
The following is an example of the settings for Pattern.
51degrees-data-file '51D_REPO_PATH'/data/51Degrees-Lite.dat
51degrees-property-name-list IsTablet DeviceType IsMobile
51degrees-property-seperator ,
HAProxy needs a way to pass device information to the backend servers. This is
done by using the 51d converter, which intercepts the User-Agent header and
creates some new headers. This is controlled in the frontend http-in section
The following is an example which adds two new HTTP headers prefixed X-51D-
frontend http-in
bind *:8081
default_backend servers
http-request set-header X-51D-DeviceTypeMobileTablet %[req.fhdr(User-Agent),51d(DeviceType,IsMobile,IsTablet)]
http-request set-header X-51D-Tablet %[req.fhdr(User-Agent),51d(IsTablet)]
Here, two headers are created with 51Degrees data, X-51D-DeviceTypeMobileTablet
and X-51D-Tablet. Any number of headers can be created this way and can be
named anything. The User-Agent header is passed to the converter in
req.fhdr(User-Agent). 51d( ) invokes the 51degrees converter. It can be passed
up to five property names of values to return. Values will be returned in the
same order, seperated by the 51-degrees-property-seperator configured earlier.
If a property name can't be found the value 'NoData' is returned instead.
The free Lite data file contains information about screen size in pixels and
whether the device is a mobile. A full list of available properties is located
on the 51Degrees web site at:
https://51degrees.com/resources/property-dictionary.
Some properties are only available in the paid for Premium and Enterprise
versions of 51Degrees. These data sets no only contain more properties but
are updated weekly and daily and contain signatures for 100,000s of different
device combinations. For more information see the data options comparison web
page:
https://51degrees.com/compare-data-options
2) How to install it
--------------------