userAgent property

String userAgent
read / write

Set and get the default value of the User-Agent header for all requests generated by this HttpClient. The default value is Dart/<version> (dart:io).

If the userAgent is set to null, no default User-Agent header will be added to each request.

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Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-io/HttpClient/userAgent.html