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The user agent string format is currently specified by section 10.1.5 of HTTP Semantics. The format of the user agent string in HTTP is a list of product tokens (keywords) with optional comments. For example, if a user's product were called WikiBrowser, their user agent string might be WikiBrowser/1.0 Gecko/1.0. The "most important" product ...
It is also possible to list multiple robots with their own rules. The actual robot string is defined by the crawler. A few robot operators, such as Google, support several user-agent strings that allow the operator to deny access to a subset of their services by using specific user-agent strings. [17] Example demonstrating multiple user-agents:
In 1992, an extension to the HTTP protocol was introduced adding a User-Agent HTTP Header which was sent from the client to the server and contained a simple string identifying the name of the client and its version. The header was meant purely for statistical purposes and for tracking down clients that violated the protocol.
Googlebot is the web crawler software used by Google that collects documents from the web to build a searchable index for the Google Search engine. This name is actually used to refer to two different types of web crawlers: a desktop crawler (to simulate desktop users) and a mobile crawler (to simulate a mobile user).
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 .
A user agent may carry out the additional action with no user interaction only if the method used in the second request is GET or HEAD. A user agent may automatically redirect a request. A user agent should detect and intervene to prevent cyclical redirects. [1]: §15.4 300 Multiple Choices
Still relying on Google? Never search for these terms. Reclaim a (tiny) bit of privacy. Most chatbots require you to create an account. If you make one, don’t use login options like “Login ...
In March 2021, 15 attorneys general of U.S. states and Puerto Rico amended an antitrust complaint filed the previous December; the updated complaint says that Google Chrome's phase-out of third-party cookies in 2022 [51] will "disable the primary cookie-tracking technology almost all non-Google publishers currently use to track users and target ...