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 and 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 and macOS

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

# cd $GOPATH
# tar xvzf golang-src-wurfl-1.12.10.0.tar.gz

WURFL Data Snapshot

To perform lookups, you will need a copy of your WURFL data snapshot (also referred to as the wurfl.xml). While there is one included in the release package, it is intended to be a sample and will not contain all of your licensed capabilities. Your licensed WURFL data snapshot can be accessed by following these directions. It's strongly recommended, as first thing, to download the latest version of your WURFL data snapshot as shown in the example below.

Usage

Here is an example to get started:

package main

import (
    "fmt"
    "scientiamobile/wurfl"
)



func main() {

    var wengine *wurfl.Wurfl
    var device *wurfl.Device

    // Download WURFL data file
    // substitute https://data.scientiamobile.com/xxxxxxx/wurfl.zip with your data URL from ScientiaMobile Vault
    // the second parameter is the destination folder where the zip file will be extracted. It must be writable by the process.
    wurfl.Download("https://data.scientiamobile.com/xxxxxxx/wurfl.zip", ".")

    wengine, err := wurfl.Create("./wurfl.zip", nil, nil, -1, wurfl.WurflCacheProviderLru, "100000")

    if err != nil {
        fmt.Println(err)
    }

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

    device, err = wengine.LookupUserAgent(ua)

    deviceid, err := device.GetDeviceID()

    fmt.Println(deviceid)

    fmt.Println(device.GetCapability("device_os"))
    fmt.Println(device.GetVirtualCapability("is_android"))

    device.Destroy()
    wengine.Destroy()
}

Create the WURFL Engine once, then lookup UserAgent and get the static and virtual capabilities needed in your implementation (NOTE: virtual capabilities are calculated at runtime).

If you already have a HTTP request, you can directly pass it to the WURFL API by using wengine.LookupRequest(). Alternately you can test passing a HTTP request to the WURFL API by creating a mock request, stuffing it with the desired test headers and passing them to the WURFL API as mentioned in the previous sentence. This is particularly useful for detecting requests with User-Agent Client Hints. In either case you can retrieve the resolved device as shown below. The static and virtual capabilities can then be requested as shown in the first snippet.

    req, _ := http.NewRequest("GET", "http://example.com", nil)
    UserAgent := "Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/10.0.0.0 Mobile Safari/537.36"
    req.Header.Add("User-Agent", UserAgent)
    req.Header.Add("Sec-CH-UA", "\" Not A;Brand\";v=\"99\", \"Chromium\";v=\"110\", \"Google Chrome\";v=\"110\"")
    req.Header.Add("Sec-CH-UA-Full-Version", "110.0.4430.91")
    req.Header.Add("Sec-CH-UA-Platform", "Android")
    req.Header.Add("Sec-CH-UA-Platform-Version", "11")
    req.Header.Add("Sec-CH-UA-Model", "SM-M315F")

    device, err = wengine.LookupRequest(req)

Additional documentation on User-Agent Client Hints and how to collect them is available here.

WURFL Updater

If you want to keep your wurfl.zip uptodate with the ScientiaMobile data release schedule, then you might want to use the Updater features.

After creating your WURFL Engine, set your personal WURFL Snapshot URL (in the form https://data.scientiamobile.com/xxxxx/wurfl.zip, with xxxxx replaced with your personal access token, located in your customer vault):

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

Specify the periodicity you would like for update checks:

_ = wengine.SetUpdaterDataFrequency(wurfl.WurflUpdaterFrequencyDaily)

Do note that a wurfl.zip file must already be present in a writable path in order for the updater to check the file and determine whether or not it needs to update the file. You can either manually download this file by going to your WURFL Snapshot URL or by following these directions.

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 wurfl.zip file, download it, and update the running engine to the latest version - all during normal application operations.

Checking User-Agent frozenness and HTTP headers quality

Starting from version 1.12.5.0 the Wurfl struct provides two new methods: IsUserAgentFrozen(), GetHeaderQuality().

IsUserAgentFrozen(ua string) returns a boolean value which, if true, means that the input User-Agent string won't be updated by the sender browser.

GetHeaderQuality() returns an enumeration value that describes the HTTP headers quality. It has three possible values:

  • HeaderQualityFull: all the headers needed for a successful WURFL detection are present. Eg. a header with all UA-CH header fields present
  • HeaderQualityBasic: only some of the headers needed for a successful WURFL detection are present.
  • HeaderQualityNone: no UA-CH headers are present

API Reference

wurfl

import "scientiamobile/wurfl"

Overview

Package wurfl - WURFL InFuze Golang module

Package wurfl - WURFL InFuze Golang module wurfl is a golang package wrapping the WURFL C API and encapsulating it in 2 golang types to provide a fast and intuitive interface. It is released for linux/macos platforms.

Index

Package files

[interface.go] [wurfl.go]

Constants

const (
    WurflEngineTargetHighAccuray             = C.WURFL_ENGINE_TARGET_HIGH_ACCURACY
    WurflEngineTargetHighPerformance         = C.WURFL_ENGINE_TARGET_HIGH_PERFORMANCE
    WurflEngineTargetDefault                 = C.WURFL_ENGINE_TARGET_DEFAULT
    WurflEngineTargetFastDesktopBrowserMatch = C.WURFL_ENGINE_TARGET_FAST_DESKTOP_BROWSER_MATCH
)

Engine Target possible values DEPRECATED as of 1.9.5.0

const (
    WurflUserAgentPriorityOverrideSideloadedBrowserUserAgent = C.WURFL_USERAGENT_PRIORITY_OVERRIDE_SIDELOADED_BROWSER_USERAGENT
    WurflUserAgentPriorityUsePlainUserAgent                  = C.WURFL_USERAGENT_PRIORITY_USE_PLAIN_USERAGENT
)

UserAgent priority possible values DEPRECATED as of 1.9.5.0

const (
    // WurflAttrExtraHeadersExperimental is deprecated since 1.12.5.0 and should not be used.
    WurflAttrExtraHeadersExperimental = C.WURFL_ATTR_EXTRA_HEADERS_EXPERIMENTAL
    // WurflAttrCapabilityFallbackCache attribute controls the capability fallback cache (needs libwurfl version 1.12.9.3 or above)
    WurflAttrCapabilityFallbackCache = C.WURFL_ATTR_CAPABILITY_FALLBACK_CACHE
)

const (
    // WurflAttrCapabilityFallbackCacheDefault is the default setting for capability fallback cache
    WurflAttrCapabilityFallbackCacheDefault = C.WURFL_ATTR_CAPABILITY_FALLBACK_CACHE_DEFAULT
    // WurflAttrCapabilityFallbackCacheDisabled disables the capability fallback cache
    WurflAttrCapabilityFallbackCacheDisabled = C.WURFL_ATTR_CAPABILITY_FALLBACK_CACHE_DISABLED
    // WurflAttrCapabilityFallbackCacheLimited sets the capability fallback cache to limited mode
    WurflAttrCapabilityFallbackCacheLimited = C.WURFL_ATTR_CAPABILITY_FALLBACK_CACHE_LIMITED
)

To control capability fallback cache, needs libwurfl version 1.12.9.3 or above

const (
    WurflCacheProviderDefault = -1
    WurflCacheProviderNone    = C.WURFL_CACHE_PROVIDER_NONE
    WurflCacheProviderLru     = C.WURFL_CACHE_PROVIDER_LRU
    // Deprecated: use WurflCacheProviderLru instead
    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 (
    WurflEnumStaticCapabilities    = C.WURFL_ENUM_STATIC_CAPABILITIES
    WurflEnumVirtualCapabilities   = C.WURFL_ENUM_VIRTUAL_CAPABILITIES
    WurflEnumMandatoryCapabilities = C.WURFL_ENUM_MANDATORY_CAPABILITIES
    WurflEnumWurflID               = C.WURFL_ENUM_WURFLID
)

Wurfl enumerator type

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

Wurfl updater frequency

Variables

var Version = "1.26"

Version is the current version of this package.

func APIVersion

func APIVersion() string

APIVersion returns version of internal InFuze API without an initialized engine

func Download

func Download(url string, folder string) error

Download downloads the WURFL data file from the specified URL and saves it to the specified folder. If the download is successful, it returns nil. Otherwise, it returns an error.

type Device

type Device struct {
    Device C.wurfl_device_handle
    Wurfl  C.wurfl_handle
    // contains filtered or unexported fields
}

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) map[string]string

GetCapabilities Get a list of Static Capabilities Deprecated: GetCapabilities is deprecated. Use GetStaticCaps instead.

func (*Device) GetCapability

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

GetCapability Get a single Capability Deprecated: GetCapability is deprecated. Use GetStaticCap instead.

func (*Device) GetCapabilityAsInt

func (d *Device) GetCapabilityAsInt(cap string) (int, error)

GetCapabilityAsInt gets a single capability value that has a int type It returns an error if the requested capability is not a numeric one (ie: brand_name)

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 ( Only for internal use/tooling)

func (*Device) GetOriginalUserAgent

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

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

func (*Device) GetParentID

func (d *Device) GetParentID() string

GetParentID - Retrieve the parent device id of this device.

func (*Device) GetRootID

func (d *Device) GetRootID() string

GetRootID - Retrieve the root device id of this device.

func (*Device) GetStaticCap

func (d *Device) GetStaticCap(cap string) (string, error)

GetStaticCap Get a single cap using new C.wurfl_device_get_static_cap() that returns error

func (*Device) GetStaticCaps

func (d *Device) GetStaticCaps(caps []string) (map[string]string, error)

GetStaticCaps Get a list of Static Capabilities

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) GetVirtualCap

func (d *Device) GetVirtualCap(vcap string) (string, error)

GetVirtualCap Get Virtual Cap with new C.wurfl_device_get_virtual_cap() that manages errors

func (*Device) GetVirtualCapabilities

func (d *Device) GetVirtualCapabilities(caps []string) map[string]string

GetVirtualCapabilities Get a list of Virtual Capabilities Deprecated: GetVirtualCapabilities is deprecated. Use GetVirtualCaps instead.

func (*Device) GetVirtualCapability

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

GetVirtualCapability Get Virtual Capability Deprecated: GetVirtualCapability is deprecated. Use GetVirtualCap instead.

func (*Device) GetVirtualCapabilityAsInt

func (d *Device) GetVirtualCapabilityAsInt(vcap string) (int, error)

GetVirtualCapabilityAsInt gets a single virtual capability value that has a int type It returns an error if the requested virtual capability is not a numeric one (ie: brand_name)

func (*Device) GetVirtualCaps

func (d *Device) GetVirtualCaps(caps []string) (map[string]string, error)

GetVirtualCaps Get a list of Virtual Capabilities

func (*Device) IsRoot

func (d *Device) IsRoot() bool

IsRoot - true if device is device root

type DeviceHandler

type DeviceHandler interface {
    GetMatchType() int
    GetVirtualCapabilities(caps []string) map[string]string
    GetVirtualCaps(caps []string) (map[string]string, error)
    GetVirtualCapability(vcap string) string
    GetVirtualCap(vcap string) (string, error)
    GetVirtualCapabilityAsInt(vcsp string) (int, error)
    GetCapabilities(caps []string) map[string]string
    GetStaticCaps(caps []string) (map[string]string, error)
    GetCapability(cap string) string
    GetStaticCap(cap string) (string, error)
    GetCapabilityAsInt(cap string) (int, error)
    IsRoot() bool
    GetRootID() string
    GetParentID() string
    GetDeviceID() (string, error)
    GetNormalizedUserAgent() (string, error)
    GetOriginalUserAgent() (string, error)
    GetUserAgent() (string, error)
    Destroy()
}

DeviceHandler defines API methods for the Wurfl Device handle

type HeaderQuality

type HeaderQuality int

HeaderQuality represents the header quality value

const (
    // HeaderQualityNone no User Agent Client Hints are present.
    HeaderQualityNone HeaderQuality = C.WURFL_ENUM_UACH_NONE
    // HeaderQualityBasic only some of the headers needed for a successful WURFL detection are present.
    HeaderQualityBasic HeaderQuality = C.WURFL_ENUM_UACH_BASIC
    // HeaderQualityFull all the headers needed for a successful WURFL detection are present.
    HeaderQualityFull HeaderQuality = C.WURFL_ENUM_UACH_FULL
)

func (HeaderQuality) String

func (hq HeaderQuality) String() string

type Updater

type Updater interface {
    SetUpdaterDataURL(DataURL string) error
    SetUpdaterDataFrequency(Frequency int) error
    SetUpdaterDataURLTimeout(ConnectionTimeout int, DataTransferTimeout int) error
    SetUpdaterLogPath(LogFile string) error
    UpdaterRunonce() error
    UpdaterStart() error
    UpdaterStop() error
    SetUpdaterUserAgent(userAgent string) error
    GetUpdaterUserAgent() string
}

Updater defines API methods for the Updater

type Wurfl

type Wurfl struct {
    Wurfl                C.wurfl_handle
    ImportantHeaderNames []string
    // contains filtered or unexported fields
}

Wurfl represents internal wurfl infuze handle

func Create

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

Create the wurfl engine.Parameters : 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 DEPRECATED: EngineTarget : As of 1.9.5.0 has no effect anymore 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) GetAllDeviceIds

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

GetAllDeviceIds returns a slice containing all WURFL device IDs

func (*Wurfl) GetAllVCaps

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

GetAllVCaps return all virtual capabilities names

func (*Wurfl) GetAttr

func (w *Wurfl) GetAttr(attr int) (int, error)

GetAttr : get we engine attributes

func (*Wurfl) GetEngineTarget

func (w *Wurfl) GetEngineTarget() string

GetEngineTarget - Returns a string representing the currently set WURFL Engine Target. Possible values are "HIGH_ACCURACY", "HIGH_PERFORMANCE" or "INVALID". DEPRECATED: will always return default value

func (*Wurfl) GetHeaderQuality

func (w *Wurfl) GetHeaderQuality(r *http.Request) (HeaderQuality, error)

GetHeaderQuality return the header quality value of HTTP request headers

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) GetLastUpdated

func (w *Wurfl) GetLastUpdated() string

GetLastUpdated - get last wurfl.xml update time

func (*Wurfl) GetUpdaterUserAgent

func (w *Wurfl) GetUpdaterUserAgent() string

GetUpdaterUserAgent - gets your scientiamobile vault https updater url

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 DEPRECATED: will always return default value

func (*Wurfl) GoStringToCStringUsingMap

func (w *Wurfl) GoStringToCStringUsingMap(capname string) *C.char

GoStringToCStringUsingMap returns a C string pointer for the given capability name using a cached map.

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) IsUserAgentFrozen

func (w *Wurfl) IsUserAgentFrozen(ua string) bool

IsUserAgentFrozen : returns true if an useragent is frozen

func (*Wurfl) LookupDeviceID

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

LookupDeviceID : lookup by wurfl_ID and return Device handle

func (*Wurfl) LookupDeviceIDWithImportantHeaderMap

func (w *Wurfl) LookupDeviceIDWithImportantHeaderMap(DeviceID string, IHMap map[string]string) (*Device, error)

LookupDeviceIDWithImportantHeaderMap : Lookup deviceID using header values found in IHMap. IHMap must be filled with Wurfl.ImportantHeaderNames values

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) LookupWithImportantHeaderMap

func (w *Wurfl) LookupWithImportantHeaderMap(IHMap map[string]string) (*Device, error)

LookupWithImportantHeaderMap : Lookup using header values found in IHMap. IHMap must be filled with Wurfl.ImportantHeaderNames values

func (*Wurfl) SetAttr

func (w *Wurfl) SetAttr(attr int, value int) error

SetAttr : we engine attributes

func (*Wurfl) SetLogPath

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

SetLogPath - set path of main libwurfl log file (updater has a separate log file)

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) SetUpdaterDataURLTimeout

func (w *Wurfl) SetUpdaterDataURLTimeout(ConnectionTimeout int, DataTransferTimeout int) error

SetUpdaterDataURLTimeout - set connection and data transfer timeouts (in millisecs) for updater http call. 0 for no timeout, -1 for defaults

func (*Wurfl) SetUpdaterLogPath

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

SetUpdaterLogPath - set path of updater log file

func (*Wurfl) SetUpdaterUserAgent

func (w *Wurfl) SetUpdaterUserAgent(userAgent string) error

SetUpdaterUserAgent - set your scientiamobile vault https updater url

func (*Wurfl) SetUserAgentPriority

func (w *Wurfl) SetUserAgentPriority(prio int)

SetUserAgentPriority - Sets which UA wurfl is using (plain or sideloaded) DEPRECATED. Since 1.9.5.0 has no effect anymore

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

type WurflHandler

type WurflHandler interface {
    GetAPIVersion() string
    Download(url string, folder string) error
    SetLogPath(LogFile string) error
    IsUserAgentFrozen(ua string) bool
    LookupDeviceIDWithImportantHeaderMap(DeviceID string, IHMap map[string]string) (DeviceHandler, error)
    LookupWithImportantHeaderMap(IHMap map[string]string) (DeviceHandler, error)
    LookupDeviceIDWithRequest(DeviceID string, r *http.Request) (DeviceHandler, error)
    LookupRequest(r *http.Request) (DeviceHandler, error)
    LookupUserAgent(ua string) (DeviceHandler, error)
    GetAllDeviceIds() []string
    LookupDeviceID(DeviceID string) (DeviceHandler, error)
    Destroy()
    GetAllVCaps() []string
    GetAllCaps() []string
    GetInfo() string
    GetHeaderQuality(r *http.Request) (HeaderQuality, error)
    GetLastLoadTime() string
    HasCapability(cap string) bool
    HasVirtualCapability(vcap string) bool
    SetAttr(attr int, value int) error
    GetAttr(attr int) (int, error)
    GetLastUpdated() string
}

WurflHandler defines API methods for the Wurfl Infuze handle

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