WURFL InFuze Module for rust : User Guide

WURFL InFuze for rust is a Rust language module wrapping the WURFL C API and encapsulating it in two rust types to provide a fast and intuitive interface. It is compatible on linux platforms for Rust edition 2018, version 1.52 and 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

InFuze for Rust is available as a source code package. In order to use it, you have to install Rust and Cargo (the rust build and execution tool).

You can install Rust and Cargo with this command: curl https://sh.rustup.rs -sSf | sh

If everything goes fine, this message will appear: "Rust is installed now. Great!"

Unpack the contents of the rust-wurfl package in a directory of choice. For example: tar xvzf rust-mod_wurfl-W.X.Y.Z.tar.gz

You can build the wurfl to use it as a library with the command cargo build --lib from the rust-wurfl project root.


Here is an example to get started:

use wurfl::*;

fn main() {
    println!("Starting WURFL wrapper usage sample!");
    let wurfl_path = <your_wurfl_file_path_here>;
    let wurfl_res = Wurfl::new(wurfl_path, None, None,
                               WurflCacheProvider::LRU, Some("100000"));
    let engine = match wurfl_res {
        Ok(engine) => engine,
        Err(error) => panic!("Problem initializing wurfl: {:?}", error),
    println!("WURFL API Version created: {}", engine.get_api_version());

    let ua = "Mozilla/5.0 (Linux; Android 6.0.1; Redmi 4A Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.116 Mobile Safari/537.36";
    let device_res = engine.lookup_useragent(ua);
    match device_res {
        Ok(d) => {
            println!("Device ID: {}", d.get_device_id());
            println!("Complete device name: : {}", d.get_virtual_capability("complete_device_name").unwrap());
            println!("Device is smartphone?: {}", d.get_virtual_capability("is_smartphone").unwrap());
        Err(_) => panic!("Lookup user agent failed")

You can also compile and run the example application with the command:

cargo run --package wurfl --example example

This code snippet creates the WURFL Engine once, then performs a lookup with a UserAgent string (you can also use any struct that implements the IntoIterator trait and contains the request headers directly using engine.lookup_with_headers) and get the static and virtual capabilities needed in your implementation (NOTE: virtual capabilities are calculated at runtime).

WURFL Updater

If you want to keep your wurfl.zip up-to-date 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 license account page):

let we = engine.set_updater_data_url(wurfl_download_url);
    let no_error = we.is_none();
    // handle error or Ok cases ...

Specify the periodicity you would like for update checks (for example, the Daily update frequency):

let we = engine.set_updater_data_frequency(WurflUpdaterFrequency::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.

Start the updater:

let we_h = engine.updater_start();

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.

Updater methods usually return an Option<WurflError>

API Reference



Cache Provider possible values

pub enum WurflCacheProvider {

Match type

pub enum Type {

Wurfl updater frequency

pub enum WurflUpdaterFrequency {

type Device

Device provides access to device static and virtual capabilities

fn get_capabilities

pub fn get_capabilities(&self,cap_names: &[&str]) -> Result<HashMap<String, String>, WurflError>]

Returns a map -> key:cap_name,value:cap_value for the calling device

fn get_virtual_capabilities

pub fn get_virtual_capabilities(&self,vcap_names: &[&str]) -> Result<HashMap<String, String>, WurflError>]

Returns a map -> key:vcap_name,value:vcap_value for the calling device

fn get_capability

pub fn get_capability(&self, capability_name: &str) -> Option<&str>

Returns the device value of the capability with the given name

fn get_device_id

pub fn get_device_id(&self) -> &str

Get wurfl_id string from device handle

fn get_match_type

 pub fn get_match_type(&self) -> MatchType 

Get type of Match occurred in lookup

fn (*Device) get_normalized_user_agent

pub fn get_normalized_user_agent(&self) -> &str {

Get the Normalized (processed by wurfl api) userAgent

fn get_original_user_agent

pub fn get_original_user_agent(&self) -> &str

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

fn get_root_id

pub fn get_root_id(&self) -> &str 

Returns the unique ID of this device ancestor in the WURFL hierarchy.

fn get_user_agent

pub fn get_user_agent(&self) -> &str

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

fn get_virtual_capability

pub fn get_virtual_capability(&self, virtual_capability_name: &str) -> Option<&str>

Get Virtual Capability

fn is_root

pub fn is_root(&self) -> bool

Returns true if this device is a root device in the WURFL hierarchy

type Wurfl

WURFL holds data and exposes methods used to perform device detection and access device capabilities.

fn new

 pub fn new(wurfl_xml: &str, patches: Option<&[&str]>, cap_filter: Option<&[&str]>,
               cache_provider: WurflCacheProvider, cache_extra_config: Option<&str>) -> Result<Wurfl, WurflError>

Create the wurfl engine. Parameters :

- wurfl_xml : path to the wurfl.xml/zip file
- patches : vector of paths of patches files to load
- cap_filter : list of capabilities used; allow to init engine without loading all 500+ caps
- cache_provider : WurflCacheProviderLru or NoCache
- cache_extra_config : size of lru cache in the form "100000"

fun get_api_version

pub fn get_api_version(&self) -> &str 

Returns version of internal InFuze API

fn get_all_caps

pub fn get_all_caps(&self) -> Vec<String>

Return all capabilities names

fn get_all_vcaps

pub fn get_all_vcaps(&self) -> Vec<String>

Returns all virtual capabilities names

fn get_info

pub fn get_info(&self) -> &str

Get wurfl.xml info

fn get_last_load_time

pub fn get_last_load_time(&self) -> &str

Get last wurfl.xml load time

fn has_capability

 pub fn has_capability(&self, cap_name: &str) -> bool

Return true if the capability exists

fn has_virtual_capability

 pub fn has_virtual_capability(&self, vcap_name: &str) -> bool

Return true if the virtual capability exists

fn lookup_device_id

pub fn lookup_device_id(&self, device_id: &str) -> Result<Device, WurflError>

Lookup by wurfl_ID and return Device handle

fn lookup_device_id_with_headers

pub fn lookup_device_id_with_headers<U, V, T: IntoIterator<Item=(U, V)>>(&self, device_id: &str, headers: T) -> Result<Device, WurflError>

Lookup by wurfl_ID and request headers and return Device handle

fn lookup_with_headers

pub fn lookup_with_headers<U, V, T: IntoIterator<Item=(U, V)>>(&self, headers: T) -> Result<Device, WurflError> where U: ToString, V: AsRef<[u8]> 

Lookup Request and return Device handle

fn lookup_useragent

pub fn lookup_useragent(&self, user_agent: &str) -> Result<Device, WurflError> 

Lookup up useragent and return Device handle

fn set_updater_data_frequency

pub fn set_updater_data_frequency(&self, freq: WurflUpdaterFrequency) -> Option<WurflError> 

Set interval of update checks

fn set_updater_data_url

pub fn set_updater_data_url(&self, data_url: &str) -> Option<WurflError>

Set your scientiamobile vault https updater url

fn set_updater_data_url_timeout

pub fn set_updater_data_url_timeout(&self, conn_timeout: i32, data_transfer_timeout: i32) -> Option<WurflError>

Set path of updater log file

fn updater_runonce

 pub fn updater_runonce(&self) -> Option<WurflError> 

Start updater process once and wait for termination

fn updater_start

 pub fn updater_start(&self) -> Option<WurflError>

Start the updater thread

fn updater_stop

pub fn updater_stop(&self) -> Option<WurflError>

Stop the updater thread

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