UserAgent.me

What Does Your User Agent Say About You?

Archive

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. Along with each request they make to the server, browsers include a self-identifying User-Agent HTTP header called a user agent (UA) string. This string often identifies the browser, its version number, and its host operating system.

Spam bots, download managers, and some browsers often send a fake UA string to announce themselves as a different client. This is known as user agent spoofing.

The user agent string can be accessed with JavaScript on the client side using the navigator.userAgent property.

A typical user agent string looks like this: "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:35.0) Gecko/20100101 Firefox/35.0".

(Source: Mozilla.org)

User Agent String

Browser Data

Npm User Agent Parser

author
Ellen Grant
• Sunday, 05 December, 2021
• 10 min read

User agent originated as port of browser scope.org's useragentparser project also known as UA- parser. User agent allows you to parse user agent string with high accuracy by using hand tuned dedicated regular expressions for browser matching.

agent user parser wurfl detection
(Source: www.scientiamobile.com)

Contents

This is why regular user agent parsers have major issues because they will most likely parse out the wrong browser name or confuse the render engine version with the actual version of the browser. The module has been developed with a benchmark driven approach.

This will asynchronous load the database from the server and compile it to a proper JavaScript supported format. If it fails to compile or load it from the remote location it will just fall back silently to the shipped version.

If you want to use this feature you need to add yamlparser and request to your package.Jason The first argument should the user agent string that is known on the server from the req.headers.user agent header.

This allows you to detect if the user is browsing the web using the Chrome Frame extension. The parser returns an Agent instance, this allows you to output user agent information in different predefined formats.

The parse method returns an Agent instance which contains all details about the user agent. This can be handy if you expect to parse a lot of user agent strings.

npm install parser body error commented aug
(Source: github.com)

It uses the same arguments as the user agent.parse method and returns exactly the same result, but it's just cached. Useragent.is(user agent string).browser name; This API provides you with a quick and dirty browser lookup.

The Agent exposes the parsed out information from the user agent strings. This allows us to extend the agent with more methods that do not necessarily need to be in the core agent instance, allowing us to expose a plugin interface for third party developers and at the same time create a uniform interface for all versioning.

Major The major version number of the family, it defaults to 0. Minor The minor version number of the family, it defaults to 0. Patch The patch version number of the family, it defaults to 0. When you access those 2 properties the agent will do on demand parsing of the Operating System or/and Device information.

Agent.agent(); Returns the family and version number concatenated in a nice human-readable string. Agent.version(); Returns the version of the browser in a human-readable string.

Fork and clone this repository Make some changes as required Write a unit test to showcase your feature Run the test suites to make sure the changes you made didn't break anything $ NPM run test Commit and push to your own repository Submit a pull request to this repository under develop branch Profit? THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND Infringement.

(Source: pwaexperts.io)

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

User agent originated as port of browser scope.org's useragentparser project also known as UA- parser. This is why regular user agent parsers have major issues because they will most likely parse out the wrong browser name or confuse the render engine version with the actual version of the browser.

The module has been developed with a benchmark driven approach. It has a pre-compiled library that contains all the Regular Expressions and uses deferred or on demand parsing for Operating System and device information.

All this engineering effort has been worth it as this benchmark shows : The --save flag tells NPM to automatically add it to your package.Jason file.

So if you are paranoid and always want your Regexp library to be up to date to match with agent the widest range of user agent strings you can do: This will asynchronous load the database from the server and compile it to a proper JavaScript supported format.

fass function example screenshots cloud google runkit
(Source: npm.runkit.com)

The first argument should the user agent string that is known on the server from the req.headers.user agent header. This allows you to detect if the user is browsing the web using the Chrome Frame extension.

The parser returns an Agent instance, this allows you to output user agent information in different predefined formats. The parse method returns an Agent instance which contains all details about the user agent.

See the Agent section of the API documentation for the available methods. This can be handy if you expect to parse a lot of user agent strings.

It uses the same arguments as the user agent.parse method and returns exactly the same result, but it's just cached. Useragent.is(user agent string).browser name; This API provides you with a quick and dirty browser lookup.

The Agent exposes the parsed out information from the user agent strings. This allows us to extend the agent with more methods that do not necessarily need to be in the core agent instance, allowing us to expose a plugin interface for third party developers and at the same time create a uniform interface for all versioning.

agent user string support keycdn
(Source: www.keycdn.com)

Major The major version number of the family, it defaults to 0. Minor The minor version number of the family, it defaults to 0. Patch The patch version number of the family, it defaults to 0. When you access those 2 properties the agent will do on demand parsing of the Operating System or/and Device information.

Agent.agent(); Returns the family and version number concatenated in a nice human-readable string. Agent.version(); Returns the version of the browser in a human-readable string.

Fork and clone this repository Make some changes as required Write a unit test to showcase your feature Run the test suites to make sure the changes you made didn't break anything $ NPM run test Commit and push to your own repository Submit a pull request to this repository under develop branch Profit? THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND Infringement.

IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Look around to find user agents for whatever browser, operating system, device, software type or layout engine you need.

Other Articles You Might Be Interested In

01: Free Download User Agent Switcher For Firefox
02: Mobile Edge Browser User Agent
03: Mobile Phone User Agent
04: Mobile User Agent Regex
05: Modify User Agent Javascript
06: Definition Of User Agent
07: Detecting User Agent Browser Version
08: Device Atlas User Agent Tester
09: Device User Agent Strings
10: Opera Change User Agent String
Sources
1 winaero.com - https://winaero.com/change-user-agent-opera/
2 www.davidtan.org - https://www.davidtan.org/how-to-change-opera-user-agent-string/
3 www.bettertechtips.com - https://www.bettertechtips.com/how-to/change-user-agent-opera/
4 www.mydigitallife.net - https://www.mydigitallife.net/how-to-spoof-or-change-opera-user-agent-string/
5 addons.opera.com - https://addons.opera.com/en/extensions/details/user-agent-switcher-5/
6 www.zytrax.com - https://www.zytrax.com/tech/web/change-ua.html
7 helpdeskgeek.com - https://helpdeskgeek.com/how-to/how-to-change-your-browsers-user-agent-without-installing-an-extension/
8 www.howtogeek.com - https://www.howtogeek.com/113439/how-to-change-your-browsers-user-agent-without-installing-any-extensions/
9 manytools.org - https://manytools.org/http-html-text/user-agent-string/