A browser's user agent string (UA) helps identify which browser is being used, what version, and on which operating system. When feature detection APIs are not available, use the UA to customize behavior or content to specific browser versions.

2024年12月9日 · The HTTP User-Agent request header is a characteristic string that lets servers and network peers identify the application, operating system, vendor, and/or version of the requesting user agent.

2024年6月25日 · The weird looking string of text (above) is your user agent. It's a short, technical description of the web browser, operating system, (and maybe mobile device) that you're using as you access the internet.

2016年9月28日 · When your browser connects to a website, it includes a User-Agent field in its HTTP header. The contents of the user agent field vary from browser to browser. Each browser has its own, distinctive user agent.

2024年12月20日 · When considering using the user agent string to detect which browser is being used, your first step is to try to avoid it if possible. Start by trying to identify why you want to do it. Are you trying to work around a specific bug in some version of a browser?

2024年7月8日 · A user agent is a computer program representing a person, for example, a browser in a Web context. Besides a browser, a user agent could be a bot scraping webpages, a download manager, or another app accessing the Web.

On the Web, a user agent is a software agent responsible for retrieving and facilitating end-user interaction with Web content. [1] This includes all web browsers , such as Google Chrome and Safari , some email clients , standalone download managers like youtube-dl , and other command-line utilities like cURL .

2024年6月25日 · A user agent is a relatively short bit of text that (attempts to) describe the Software/Browser (the "Agent") that is making the request to a website. Web browsers include the user agent string in the requests they make to websites.

Parse any User Agent string you want to understand and make the User-Agent string readable. We will show you what the User Agent means; whether it is Safari on iPad, Chrome on Windows and other popular systems, or search engine spiders or security analysis tools.

2024年9月2日 · When we talk about browser fingerprints, the first thing we need to discuss is the "UserAgent". The UserAgent is an HTTP header that the browser sends to the website server, and it contains information about the browser type, version, operating system, and so on. Wait, what is HTTP header?