Two years ago I started playing with WebUSB , a web API to connect hardware to the Web. The idea was crazy, especially that there is already an implementation supported by Chrome, but… unfortunately only few experiments worked fine. The same experiments that I saw two years ago.
Due to the lack of documentation, I quickly hit the limitation of the API and reached a dead-end. I posted few questions in stackoverflow, such as the controlTransferOut() limitation , then I find out how to deal with it.
Then I posted more detailed code on how to use WebUSB to connect to a scanner directly ! I was able to connect to my scanner, it was a Canon DR-M160II, but low level transfer code got stack somewhere. The issue seems to be related to webusb chrome implementation itself.
Emscripten wasn’t a solution too, as I quickly hit the limitation of the compiler too ! Sane was working correctly from my Ubuntu, so WebUSB should be working fine too !
Last but not least, WebUSB API lack of documentation until today. Not lots of people are using the API, 27 issues open today on github, 90 closed.
WebUSB is available in Chrome 61 for Android, Chrome OS, Linux, macOS and Windows. If you are able to connect successfully to your USB device from Chrome feel free to drop a message !
Notice that the last WebUSB API unofficial draft have been published on December 3rd 2019, by a team from Google ! The only implementation remain in Chrome… But I still thing that it’s dead, most probably because it was not able to leave Google.
以上所述就是小编给大家介绍的《WebUSB Is Dead》，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对 码农网 的支持！
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C# 6.0本质论
[美] Mark Michaelis（马克·米凯利斯）、[美] Eric Lippert（埃里克·利珀特） / 周靖、庞燕 / 人民邮电出版社 / 2017-2-1 / 108
这是C#领域中一部广受好评的名作，作者用一种易于理解的方式详细介绍了C#语言的各个方面。全书共有21章和4个附录（其中哟2个附录从网上下载），介绍了C#语言的数据类型、操作符、方法、类、接口、异常处理等基本概念，深入讨论了泛型、迭代器、反射、线程和互操作性等高级主题，还介绍了LINQ技术，以及与其相关的扩展方法、分部方法、Lambda表达式、标准查询操作符和查询表达式等内容。每章开头的“思维导图”......一起来看看 《C# 6.0本质论》 这本书的介绍吧!
