Cannot use hash trie data file on Node.js 8.9.3 using module version 3.2.18-dev

[prachaquanttech]

using this config

const fiftyonedegreescoreConfig = {

  dataFile: 'static/51degrees/51Degrees-EnterpriseV3.4.trie',
  properties: [
    'HardwareVendor', 
    'HardwareModel', 
    'HardwareFamily', 
    'PriceBand', 
    'PlatformName', 
    'PlatformVersion', 
    'ScreenPixelsHeight', 
    'ScreenPixelsWidth',
    'ReleaseMonth',
    'ReleaseYear',
    'DeviceType',
    'HardwareModelVariants',
  ],
  cacheSize: 10000,
  poolSize: 20,
}
const provider = DeviceDetection.provider(fiftyonedegreescoreConfig) //Error was throw here
const match =  provider.getMatch(ctx.header['user-agent'])
match.close()

Error: Illegal arguments for construction of _exports_Provider Please help

[prachaquanttech]

Update if I remove properties, cacheSize and poolSize from the config, Code will run fine.

[JoshGrew51D]

Hi There

You should only need to remove poolSize as this is a Pattern only option. Hash Trie does not have a workset pool like Pattern. It's matches consist of Device offsets which are smaller than Pattern worksets. As a result they are calculated on the fly.

Let me know how you get on.

[prachaquanttech]

Thanks for the answer if add "properties" option back, It will throw "segmentation fault".

[JoshGrew51D]

Which version of the data file are you using currently?

[prachaquanttech]

51Degrees-EnterpriseV3.4.trie

[JoshGrew51D]

Of course, sorry ignore me.

I have modified the example above with some changes to the configuration. Properties are not stored as an array but as a comma separated string. The keys in the config are also surrounded by quotes.

Try this and let me know what you get back.

Would you also be able to send over the code where you reference the Device Detection module in: DeviceDetection.provider

const fiftyonedegreescoreConfig = {'dataFile' : 'static/51degrees/51Degrees-EnterpriseV3.4.trie',
    'properties' : 'HardwareVendor,HardwareModel,HardwareFamily,PriceBand,PlatformName,PlatformVersion,ScreenPixelsHeight,ScreenPixelsWidth,ReleaseMonth,ReleaseYear,DeviceType,HardwareModelVariants'}

const provider = DeviceDetection.provider(fiftyonedegreescoreConfig)
const match =  provider.getMatch(ctx.header['user-agent'])
match.close()

[prachaquanttech]

This code work

const fiftyonedegreescoreConfig = {'dataFile' : 'static/51degrees/51Degrees-EnterpriseV3.4.trie',
    'properties' : 'HardwareVendor,HardwareModel,HardwareFamily,PriceBand,PlatformName,PlatformVersion,ScreenPixelsHeight,ScreenPixelsWidth,ReleaseMonth,ReleaseYear,DeviceType,HardwareModelVariants'}

const provider = DeviceDetection.provider(fiftyonedegreescoreConfig)
const match =  provider.getMatch(ctx.header['user-agent'])
match.close()

BTW we use module this in Koa.js. Can I write provider.getMatch(ctx.request) like in Express.js?

Thanks a lot