user-agentheader

2022年6月2日—TheHTTPUser-Agentheaderisusedtoprovideinformationabouttheclient'sbrowserandoperatingsystemtotheserverinorderfortheserver ...,2023年4月10日—TheUser-Agentrequestheaderisacharacteristicstringthatletsserversandnetworkpeersidentifytheapplication,operatingsystem, ...,2020年10月3日—校正小編補充：UserAgent並不是一個一定會包含在HTTP(S)Request裡面的內容，它屬於Header，是開發者可以自己訂或 ....

參考資訊如下
User-Agent

2022年6月2日 — The HTTP User-Agent header is used to provide information about the client's browser and operating system to the server in order for the server ...

User-Agent - HTTP - MDN Web Docs

2023年4月10日 — The User-Agent request header is a characteristic string that lets servers and network peers identify the application, operating system, ...

要怎麼辨別使用者瀏覽者用哪種瀏覽器呢？用UserAgent是最 ...

2020年10月3日 — 校正小編補充： UserAgent並不是一個一定會包含在HTTP(S) Request裡面的內容，它屬於Header，是開發者可以自己訂或 ...

User

In computing, the User-Agent header is an HTTP header intended to identify the user agent responsible for making a given HTTP request.

Headers之User

2018年4月14日 — User-Agent顾名思义，就是指谁来代替我们访问网页的。如果它对应的是requests库，那么对方网站就可以直接看出你是爬虫而拒绝这次请求。

Firefox user agent string reference - HTTP

2024年1月12日 — This document describes the user agent string used in Firefox 4 and later and applications based on Gecko 2.0 and later.

User agent

The user agent plays the role of the client in a client–server system. The HTTP User-Agent header is intended to clearly identify the agent to the server.

HttpRequestHeaders.UserAgent Property (System.Net.Http ...

Gets the value of the User-Agent header for an HTTP request.

List of User Agent strings

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 ...

User-agent

The User-Agent is a header that each client can set in the request to inform the server which user-agent it is. Sometimes servers look at this header and ...