infuze golang module user guide

WURFL InFuze Module for golang : User Guide

WURFL InFuze for golang is a GO language module wrapping the WURFL C API and encapsulating it in two golang types to provide a fast and intuitive interface. It is compatible on linux/macos platforms for golang 1.7 or higher.

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.

Installation on Linux/MacOS X

InFuze for golang is available as a binary package. To install it just untar the contents in your GOPATH folder.

# cd $GOPATH
# tar xvzf golang-wurfl-


Here is an example to get started using InFuze for golang:

package main

import (

func main() {

 wengine, err = wurfl.Create("/tmp/", nil, -1, wurfl.WurflCacheProviderDoubleLru, "100000,30000")

 ua := "Dalvik/1.6.0 (Linux; U; Android 4.3; SM-N900T Build/JSS15J)"

 device, err := wengine.Lookup(ua)

 deviceid, err := device.GetDeviceId()




Create the wurfl engine once and then lookup UserAgent (or a request directly using wengine.LookupRequest()) and get the capabilities and virtual capabilities needed in your implementation (NOTE: virtual capabilities are calculated at runtime).

WURFL Updater

If you want to keep your uptodate with the ScientiaMobile data release schedule, then you might want to use the Updater features, available in golang WURFL as follows :

After creating your WURFL engine, set your personal WURFL Snapshot URL (in the form, with xxxxx replaced with your personal access token, located in your license account page):

  uerr := wengine.SetUpdaterDataURL(Url)
    if uerr != nil {
        fmt.Printf("SetUpdaterDataUrl returned : %s\n", uerr.Error())

Specify which periodicity you would like for update checks:

_ = wengine.SetUpdaterDataFrequency(wurfl.WurflUpdaterFrequencyDaily)

Then start the updater:

uerr = wengine.UpdaterStart()
if uerr != nil {
  fmt.Printf("UpdaterStart returned : %s\n", uerr.Error())

Updater will run a daily check for the latest release of the file, download it, and update the running engine to the latest version - all during normal application operations.

API Reference



const (
    WurflUserAgentPriorityUsePlainUserAgent                  = C.WURFL_USERAGENT_PRIORITY_USE_PLAIN_USERAGENT

UserAgent priority possible values

const (
    WurflCacheProviderNone      = C.WURFL_CACHE_PROVIDER_NONE
    WurflCacheProviderLru       = C.WURFL_CACHE_PROVIDER_LRU
    WurflCacheProviderDoubleLru = C.WURFL_CACHE_PROVIDER_DOUBLE_LRU

Cache Provider possible values

const (
    WurflMatchTypeExact           = C.WURFL_MATCH_TYPE_EXACT
    WurflMatchTypeConclusive      = C.WURFL_MATCH_TYPE_CONCLUSIVE
    WurflMatchTypeRecovery        = C.WURFL_MATCH_TYPE_RECOVERY
    WurflMatchTypeCatchall        = C.WURFL_MATCH_TYPE_CATCHALL
    WurflMatchTypeHighPerformance = C.WURFL_MATCH_TYPE_HIGHPERFORMANCE
    WurflMatchTypeNone            = C.WURFL_MATCH_TYPE_NONE
    WurflMatchTypeCached          = C.WURFL_MATCH_TYPE_CACHED

Match type

const (
    WurflUpdaterFrequencyDaily  = C.WURFL_UPDATER_FREQ_DAILY
    WurflUpdaterFrequencyWeekly = C.WURFL_UPDATER_FREQ_WEEKLY

Wurfl updater frequency

type Device

type Device struct {
    Device C.wurfl_device_handle
    Wurfl  C.wurfl_handle

Device represent internal matched device handle

func (*Device) Destroy

func (d *Device) Destroy()

Destroy device handle, should be called when when device attributes are not needed anymore

func (*Device) GetCapabilities

func (d *Device) GetCapabilities(caps []string) []string

GetCapabilities Get a list of Capabilities

func (*Device) GetCapability

func (d *Device) GetCapability(cap string) string

GetCapability Get a single Capability

func (*Device) GetDeviceID

func (d *Device) GetDeviceID() (string, error)

GetDeviceID Get wurfl_id string from device handle

func (*Device) GetMatchType

func (d *Device) GetMatchType() int

GetMatchType Get type of Match occurred in lookup

func (*Device) GetNormalizedUserAgent

func (d *Device) GetNormalizedUserAgent() (string, error)

GetNormalizedUserAgent Get the Normalized (processed by wurfl api) userAgent

func (*Device) GetOriginalUserAgent

func (d *Device) GetOriginalUserAgent() (string, error)

GetOriginalUserAgent Get the original userAgent of matched device (the one passed to lookup)

func (*Device) GetRootID

func (d *Device) GetRootID() string

GetRootID - Retrieve the root device ID of this device.

func (*Device) GetUserAgent

func (d *Device) GetUserAgent() (string, error)

GetUserAgent Get default UserAgent of matched device (might be different from UA passed to lookup)

func (*Device) GetVirtualCapability

func (d *Device) GetVirtualCapability(vcap string) string

GetVirtualCapability Get Virtual Capability

func (*Device) IsRoot

func (d *Device) IsRoot() bool

IsRoot - true if device is device root

type Wurfl

type Wurfl struct {
    Wurfl C.wurfl_handle

Wurfl represents internal wurfl infuze handle

func Create

func Create(Wurflxml string, Patches []string, CapFilter []string, CacheProvider int, CacheExtraConfig string) (*Wurfl, error)

Create the wurfl engine.

Wurflxml - path to the wurfl.xml/zip file Patches - slice of paths of patches files to load CapFilter - list of capabilities used; allow to init engine without loading all 500+ caps CacheProvider - WurflCacheProviderLru or WurflCacheProviderDoubleLru CacheExtraConfig - size of single or double lru caches in the form "100000" or "100000,30000"

func (*Wurfl) Destroy

func (w *Wurfl) Destroy()

Destroy the wurfl engine

func (*Wurfl) GetAPIVersion

func (w *Wurfl) GetAPIVersion() string

GetAPIVersion returns version of internal InFuze API

func (*Wurfl) GetAllCaps

func (w *Wurfl) GetAllCaps() []string

GetAllCaps return all capabilities names

func (*Wurfl) GetAllVCaps

func (w *Wurfl) GetAllVCaps() []string

GetAllVCaps return all virtual capabilities names

func (*Wurfl) GetInfo

func (w *Wurfl) GetInfo() string

GetInfo - get wurfl.xml info

func (*Wurfl) GetLastLoadTime

func (w *Wurfl) GetLastLoadTime() string

GetLastLoadTime - get last wurfl.xml load time

func (*Wurfl) GetUserAgentPriority

func (w *Wurfl) GetUserAgentPriority() string

GetUserAgentPriority - Tells if WURFL is using the plain user agent or the sideloaded browser user agent for device detection

func (*Wurfl) HasCapability

func (w *Wurfl) HasCapability(cap string) bool

HasCapability - HasVirtualCapability return true is the vcap exists

func (*Wurfl) HasVirtualCapability

func (w *Wurfl) HasVirtualCapability(vcap string) bool

HasVirtualCapability - HasVirtualCapability return true is the vcap exists

func (*Wurfl) LookupDeviceID

func (w *Wurfl) LookupDeviceID(DeviceID string) (*Device, error)

LookupDeviceID : lookup by wurfl_ID and return Device handle

func (*Wurfl) LookupDeviceIDWithRequest

func (w *Wurfl) LookupDeviceIDWithRequest(DeviceID string, r *http.Request) (*Device, error)

LookupDeviceIDWithRequest : lookup by wurfl_ID and request headers and return Device handle

func (*Wurfl) LookupRequest

func (w *Wurfl) LookupRequest(r *http.Request) (*Device, error)

LookupRequest : Lookup Request and return Device handle

func (*Wurfl) LookupUserAgent

func (w *Wurfl) LookupUserAgent(ua string) (*Device, error)

LookupUserAgent : lookup up useragent and return Device handle

func (*Wurfl) SetUpdaterDataFrequency

func (w *Wurfl) SetUpdaterDataFrequency(Frequency int) error

SetUpdaterDataFrequency - set interval of update checks

func (*Wurfl) SetUpdaterDataURL

func (w *Wurfl) SetUpdaterDataURL(DataURL string) error

SetUpdaterDataURL - set your scientiamobile vault https updater url

func (*Wurfl) SetUpdaterLogPath

func (w *Wurfl) SetUpdaterLogPath(LogFile string) error

SetUpdaterLogPath - set path of updater log file

func (*Wurfl) SetUserAgentPriority

func (w *Wurfl) SetUserAgentPriority(prio int)

SetUserAgentPriority - Sets which UA wurfl is using (plain or sideloaded)

func (*Wurfl) UpdaterRunonce

func (w *Wurfl) UpdaterRunonce() error

UpdaterRunonce - start updater process once and wait for termination

func (*Wurfl) UpdaterStart

func (w *Wurfl) UpdaterStart() error

UpdaterStart - start the updater thread

func (*Wurfl) UpdaterStop

func (w *Wurfl) UpdaterStop() error

UpdaterStop - stop the updater thread

IMPORTANT - Decommissioning of MatchMode options Prior to version 1.9 of the API, users could choose between MatchMode.Performance and MatchMode.Accuracy engine optimization options. These options had been introduced years ago to manage the behavior of certain web browsers and their tendency to present "always different" User-Agent strings that would baffle strategies to cache similar WURFL queries in memory.
As the problem has been solved by browser vendors, the need to adopt this strategy has diminished and ultimately disappeared (i.e. there was no longer much to be gained with the performance mode in most circumstances) and ScientiaMobile elected to "remove" this option to simplify configuration and go in the direction of uniform API behavior in different contexts.


2017 ScientiaMobile Incorporated All Rights Reserved.

NOTICE: All information contained herein is, and remains the property of ScientiaMobile Incorporated and its suppliers, if any. The intellectual and technical concepts contained herein are proprietary to ScientiaMobile Incorporated and its suppliers and may be covered by U.S. and Foreign Patents, patents in process, and are protected by trade secret or copyright law. Dissemination of this information or reproduction of this material is strictly forbidden unless prior written permission is obtained from ScientiaMobile Incorporated.