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.
Oct 28, 2025 · 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.
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. Your web browser sends it to every website you visit.
8 avr. 2010 · The " User-Agent " header field contains information about the user agent originating the request, which is often used by servers to help identify the scope of reported …
29 janv. 2018 · 用户代理（user-agent）是浏览器客户端与服务器交互时的重要信息之一，用于帮助网站识别请求用户的浏览器类别，以便于网站发送相应的网页数据。用户代理数据包括：操 …
Find out your user agent string, browser, opera system, device and more with this tool. Learn what a user agent is and how it is used for feature detection and compatibility.
UserAgents.io provides a simple way to parse a user agent and get technical information about it. The database is updated daily and easy to navigate.
25 avr. 2009 · The user agent doesn't change how Safari renders a page, it just changes what browser Safari pretends to be when making the HTTP request, and when calling …
6 nov. 2012 · The user agent string is a text that the browsers themselves send to the webserver to identify themselves, so that websites can send different content based on the browser or …
Usage example: You can alter your user-agent string to indicate you?re on a mobile device if you prefer seeing mobile versions of sites so they load quicker. -- This extension allows you to spoof your browser "user-agent" string to a custom designation, making it impossible for websites to know specific details about your browsing arrangement.
With this extension, you can quickly and easily switch between user-agent strings. Also, you can set up specific URLs that you want to spoof every time. Please note that this does not provide improved privacy while browsing the Internet and that some sites might have other means to figure out that the browser is not what it pretends to be.
A user agent is a text string sent by your browser or script during an HTTP request to identify the client’s software and operating environment to the server. It typically includes the browser name, version, operating system, and, occasionally, the device type.
The User-Agent (UA) string is contained in the HTTP headers and is intended to identify devices requesting online content. The User-Agent tells the server what the visiting device is (among many other things) and this information can be used ...
This module is for generating random, valid web user agents:
>>> from user_agent import generate_user_agent, generate_navigator >>> from pprint import pprint >>> generate_user_agent() 'Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 6.3; Win64; x64)' >>> generate_user_agent(os=('mac', 'linux')) 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:36.0) Gecko/20100101 Firefox/36.0' >>> pprint(generate_navigator()) {'app_code_name': 'Mozilla', 'app_name': 'Netscape', 'appversion': '5.0', 'name': 'firefox', 'os': 'linux', 'oscpu': 'Linux i686 on x86_64', 'platform': 'Linux i686 on x86_64', 'user_agent': 'Mozilla/5.0 (X11; Ubuntu; Linux i686 on x86_64; rv:41.0) Gecko/20100101 Firefox/41.0', 'version': '41.0'} >>> pprint(generate_navigator_js()) {'appCodeName': 'Mozilla', 'appName': 'Netscape', 'appVersion': '38.0', 'platform': 'MacIntel', 'userAgent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:38.0) Gecko/20100101 Firefox/38.0'}
25 févr. 2013 · The User-Agent appears in an HTTP Request Header, not an HTTP Response one. In general, the request is sent from browser to the web application. So the user-agent …
This extension is designed to shield your online privacy and make it super easy to appear as if you're browsing from different devices.
With this extension, you can quickly and easily switch between user-agent strings. Also, you can set up specific URLs that you want to spoof every time.
Learn how to decode and understand any user agent string sent by your web browser or other software. Use this tool to parse user agents by browser, OS, platform, hardware, software type and layout engine.
10 févr. 2020 · 我们可以复制一下这个User-Agent请求头，模仿浏览器的浏览行为，将其粘贴在pycharm的headers的后面，并以字典的形式进行呈现即可完成请求头的代码编写。
Un user agent est un identifiant qui permet à un « agent » de s'identifier sur le web et de donner des informations sur lui-même.
12 mars 2021 · It’s entirely arbitrary what you put in the user agent field so there is no standard as to what format to use. Saying that, for historical reasons, browsers like to claim to be lots of …
So, I decided I would create a user agent list that is dynamically generated and updated- it uses data from my own website to keep the list of user-agent data up to date – which means the list stays up to date as new browsers are released and new user agents emerge.
& User Centric. Nous concevons, designons et développons des produits et des expériences digitales sur-mesure : sites web, applications mobiles, apps dans ...
Sep 30, 2024 · The HTTP header User-Agent is a request header that sends a characteristic string to web servers, allowing them to identify the Operating System (OS) and browser of the client making the request. Every time your browser connects to a website, it includes the User-Agent field in the HTTP header.
19 mars 2014 · I'm looking for a User Agent Switcher for Chrome. Searching the Chrome Web Store does not come up with a simple switcher. I understand I can run the browser via …
Un user agent ou agent utilisateur est une application logicielle cliente qui utilise un protocole réseau particulier ; l'expression est principalement employée ...
The user-agent should be specified as a field in the header. Here is a list of HTTP header fields, and you'd probably be interested in request-specific fields, which includes User-Agent. If you're …
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Les agents utilisateurs, ou user-agent en anglais, servent à identifier le logiciel utilisé pour accéder à un site web ou à un autre service en ligne.
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19 avr. 2020 · 开发者工具在不同内核的浏览器上，样式不一样。这里演示最普遍的Webkit内核（注：Google Chrome，Opera，360安全浏览器，猎豹浏览器等都使用了webkit内核，目前的主流 …
Traces laissées par votre User-Agent ... Le User-Agent est une empreinte numérique envoyée par votre navigateur aux sites web, révélant votre ...
A user agent is a computer program representing a person, for example, a browser in a Web context.
User-agent Attributes User-agent OS Attributes User-agent Attributes Describes user-agent attributes. Attributes: Key Stability Value Type Description Example Values user_agent.name string Name of the user-agent extracted from original. Usually refers to the browser’s name.
if (FALSE) { GET("http://httpbin.org/user-agent") GET("http://httpbin.org/user-agent", user_agent("httr")) } Run the code above in your browser using DataLab
{'app_code_name': 'Mozilla', 'app_name': 'Netscape', 'app_version': '5.0 (Windows)', 'build_id': '20170124100044', 'build_version': '51.0', 'navigator_id': 'firefox', 'os_id': 'win', 'oscpu': 'Windows NT 6.2', 'platform': 'Windows NT 6.2', 'product': 'Gecko', 'product_sub': '20100101', 'user_agent': 'Mozilla/5.0 (Windows NT 6.2; rv:51.0) Gecko/20100101 ' 'Firefox/51.0', 'vendor': '', 'vendor_sub': ''}
That Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36 user-agent header is the one used by the most recent Chrome on macOS—which is a little odd here as the Sec-Ch-Ua-Platform : “Linux” indicates that the agent browser runs on Linux.