taotaojiangshui/yauaa

Yet Another UserAgent Analyzer

Yauaa: Yet Another UserAgent Analyzer

This is a java library that tries to parse and analyze the useragent string and extract as many relevant attributes as possible.

The full documentation can be found here https://yauaa.basjes.nl

HIGH Profile release notes:

Version 5.8

The detection for Microsoft Edge now no longer reports the 'EdgeHtml' version as if it is the version of 'Edge' itself. Microsoft made a mess of things again.

Version 5.6

In version 5.6 the number of detected DeviceBrands is greatly increased. The detection system for the DeviceBrand has been rewritten and as a consequence both the memory usage and the time needed for the analysis have been decreased.

Version 5.5

With Google Chrome 70 the useragent string pattern has been changed on Android ( https://www.chromestatus.com/feature/4558585463832576 ) . As a consequence the detection of the DeviceBrand failed and you always get "Unknown". This has been fixed in Yauaa 5.5.

Version 5.1 is bad.

If you are using version 5.1 you should upgrade IMMEDIATELY because 5.1 crashes over specific useragent patterns caused by a simple packaging mistake.

Mozilla/1.2.3 (http://basjes.nl)

Blog post

A bit more background about this useragent parser can be found in this blog which I wrote about it: https://techlab.bol.com/making-sense-user-agent-string/

Example output

As an example the useragent of my phone:

Mozilla/5.0 (Linux; Android 7.0; Nexus 6 Build/NBD90Z) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.124 Mobile Safari/537.36

is converted into this set of fields:

Field name	Value
Device Class	Phone
Device Name	Google Nexus 6
Device Brand	Google
Operating System Class	Mobile
Operating System Name	Android
Operating System Version	7.0
Operating System Name Version	Android 7.0
Operating System Version Build	NBD90Z
Layout Engine Class	Browser
Layout Engine Name	Blink
Layout Engine Version	53.0
Layout Engine Version Major	53
Layout Engine Name Version	Blink 53.0
Layout Engine Name Version Major	Blink 53
Agent Class	Browser
Agent Name	Chrome
Agent Version	53.0.2785.124
Agent Version Major	53
Agent Name Version	Chrome 53.0.2785.124
Agent Name Version Major	Chrome 53

Try it!

You can try it online with your own browser here: https://try.yauaa.basjes.nl/.

NOTES

1. This runs under a "Free quota" on Google AppEngine. If this quota is exceeded then it will simply become unavailable for that day.
2. After a while of inactivity the instance is terminated so the first page may take 15-30 seconds to load.
3. If you really like this then run it on your local systems. It's much faster that way.

Related projects

Stefano Balzarotti is putting a lot of effort into porting Yauaa to run in .NET standard.

You can track his efforts here on Github: Yauaa .NET standard and download his releases via Nuget.

Donations

If this project has business value for you then don't hesitate to support me with a small donation.

License

Yet Another UserAgent Analyzer
Copyright (C) 2013-2019 Niels Basjes

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.