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

User Agent Electron

author
Carole Stephens
• Sunday, 13 December, 2020
• 30 min read

Making statements based on opinion; back them up with references or personal experience. Reload to refresh your session. You signed out in another tab or window.

electron additional cors requests v7 protocols information don custom
(Source: github.com)

Contents

Bring in own user agent styles · Issue #22055 · electron/electron · GitHub Dismiss GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together.

We use optional third-party analytics cookies to understand how you use GitHub.com, so we can build better products. We use optional third-party analytics cookies to understand how you use GitHub.com, so we can build better products.

You can always update your selection by clicking Cookie Preferences at the bottom of the page. Analytics cookies We use analytics cookies to understand how you use our websites, so we can make them better, e.g. they're used to gathering information about the pages you visit and how many clicks you need to accomplish a task.

An user agent is a client that initiates a request for a local service to establish a connection to a remote server. An XML manager uses an user agent, for example, to retrieve resources from elsewhere on the network.

The settings for an user agent can affect messages that a DataPower® service sends out. By the default, the configuration of this user agent is as follows: Allows a maximum of eight HTTP redirect messages before declaring the target as unreachable.

(Source: www.sellmyretro.com)

Sets the idle timeout to 300 seconds before timing out and closing the connection. SSL profile The user agent establishes a secure connection to the remote server for requests that match the URL expression.

SOAP Action The user agent includes the specified contents in the Compaction header in requests that match the URL expression. These client settings can be overridden by query parameters in the URL that initiates the file transfer.

These client settings can be overridden by query parameters in the URL that initiates the mail transfer. These client settings can be overridden by query parameters in the URL that initiates the file transfer.

Rv: gecko version indicates the release version of Gecko (such as 17.0 “). The Chrome (or Chromium/Blink-based engines) user agent string is similar to Firefox’s.

For compatibility, it adds strings like HTML, like Gecko and Safari. The Opera browser is also based on the Blink engine, which is why it almost looks the same, but adds “Or/”.

electron user locksands
(Source: locksands.wordpress.com)

In this example, the user agent string is mobile Safari’s version. Pitifully, features like hot reload aren't available in Electron aren't available so you will sometimes want to work directly in the browser as you always do with your web app.

Fortunately, to know when you're inside Electron or the Browser is pretty easy, and we'll show you how to achieve it in this article. The selection module is a tiny utility that allows you to know when you are inside the Electron platform or a common browser.

Install this module by switching to the directory of your project with the terminal and executing the following command: There's no “standard” way of writing an user agent string, so different web browsers use different formats (some are wildly different), and many web browsers cram loads of information into their user agents.

When loading a page in the window directly, users may see the page load incrementally, which is not a good experience for a native app. To make the window display without visual flash, there are two solutions for different situations.

It is recommended that you pause expensive operations when the visibility state is hidden in order to minimize power consumption. On Linux the type of modal windows will be changed to dialog.

(Source: medium.com)

On Linux many desktop environments do not support hiding a modal window. It creates a new BrowserWindow with native properties as set by the options.

On Linux setting focusable: false makes the window stop interacting with Wm, so the window will always stay on top in all workspaces. When explicitly set to false the full screen button will be hidden or disabled on macOS.

Can be appearance-based, light, dark, title bar, selection, menu, popover, sidebar, medium-light, ultra-dark, header, sheet, window, HUD, fullscreen-ui, tooltip, content, under-window, or under-page. Please note that using frame: false in combination with a vibrancy value requires that you use a non-default titleBarStyle as well.

By assigning the same partition, multiple pages can share the same session. Note that due to reusing the renderer process, certain preferences options will also be shared between the web pages even when you specified different values for them, including but not limited to preload, sandbox and reintegration.

The context that the preload script runs in will still have full access to the document and window global but it will use its own set of JavaScript built ins (Array, Object, JSON, etc.) And will be isolated from any changes made to the global environment by the loaded page.

electron
(Source: www.sellmyretro.com)

The Electron API will only be available in the preload script and not the loaded page. This option should be used when loading potentially untrusted remote content to ensure the loaded content cannot tamper with the preload script and any Electron APIs being used.

Note: The preload script configured for the will have node integration enabled when it is executed so you should ensure remote/untrusted content is not able to create a tag with a possibly malicious preload script. You can use the will-attach-webview event on contents to strip away the preload script and to validate or alter the 's initial settings.

When setting minimum or maximum window size with width / width / height / height, it only constrains the users. The possible values and behaviors of the type option are platform dependent.

On Linux, possible types are desktop, dock, toolbar, splash, notification. The textured type adds metal gradient appearance (NSTexturedBackgroundWindowMask).

Objects created with new BrowserWindow emit the following events: Note: Some events are only available on specific operating systems and are labeled as such.

oauth authentication appear manipulating agent chrome window
(Source: pragli.com)

ExplicitSet is false when title is synthesized from file URL. In Electron, returning any value other than undefined would cancel the close.

It is recommended to always set the event.returnable explicitly, instead of only returning a value, as the former works more consistently within Electron. After you have received this event you should remove the reference to the window and avoid using it anymore.

Emitted when the web page has been rendered (while not being shown) and window can be displayed without a visual flash. Please note that using this event implies that the renderer will be considered “visible” and paint even though show is false.

Resizing the window with rebounds / seize will not emit this event. On macOS, resizing the window with rebounds / seize and setting the animate parameter to true will also emit this event once resizing has finished.

Resizing the window with rebounds / seize will not emit this event. Emitted when the window enters a full-screen state triggered by HTML API.

scraping electron web demonstration application description
(Source: en.jeffprod.com)

Emitted when the window leaves a full-screen state triggered by HTML API. These are typically related to keyboard media keys or browser commands, as well as the “Back” button built into some mice on Windows.

Emitted when scroll wheel event phase filed upon reaching the edge of element. Most macOS trackpads are not configured to allow this kind of swiping anymore, so in order for it to emit properly the 'Swipe between pages' preference in System Preferences > Trackpad > More Gestures must be set to 'Swipe with two or three fingers'.

The method will also not return if the extension's manifest is missing or incomplete. Note: This API cannot be called before the ready event of the app module is emitted.

Note: This API cannot be called before the ready event of the app module is emitted. Note: This API cannot be called before the ready event of the app module is emitted.

If you try to add an extension that has already been loaded, this method will not return and instead log a warning to the console. The method will also not return if the extension's manifest is missing or incomplete.

discord electron oauth2 application use adds trying error sure screenshot much login
(Source: stackoverflow.com)

Note: This API cannot be called before the ready event of the app module is emitted. Note: This API cannot be called before the ready event of the app module is emitted.

To check if a DevTools extension is installed you can run the following: Note: This API cannot be called before the ready event of the app module is emitted.

An Integer property representing the unique ID of the window. Each ID is unique among all BrowserWindow instances of the entire Electron application.

A Boolean property that determines whether the window menu bar should hide itself automatically. Once set, the menu bar will only show when users press the single Alt key.

If the menu bar is already visible, setting this property to true won't hide it immediately. A Boolean property that determines whether the window is in simple (region) full screen mode.

downloads
(Source: www.electronjs.org)

A Boolean property that determines whether the window is in full screen mode. A Boolean property that determines whether the window is visible on all workspaces.

A Boolean property that determines whether the menu bar should be visible. A Boolean property that determines whether the window is in kiosk mode.

A Boolean property that specifies whether the window’s document has been edited. The icon in title bar will become gray when set to true.

A String property that determines the path name of the file the window represents, and the icon of the file will show in window's title bar. A String property that determines the title of the native window.

A Boolean property that determines whether the window can be manually minimized by user. A Boolean property that determines whether the window can be manually maximized by user.

nanoscope electron methods applications difference
(Source: www.taylorfrancis.com)

A Boolean property that determines whether the window can be manually resized by user. A Boolean property that determines whether the window can be manually closed by user.

A Boolean property that determines Whether the window can be moved by user. A String property that defines an alternative title provided only to accessibility tools such as screen readers.

Objects created with new BrowserWindow have the following instance methods: Note: Some methods are only available on specific operating systems and are labeled as such.

Force closing the window, the unload and before unload event won't be emitted for the web page, and close event will also not be emitted for this window, but it guarantees the closed event will be emitted. This has the same effect as a user manually clicking the close button of the window.

Consider a normal window with an HD video player and associated controls. In order to maintain a 16:9 aspect ratio (standard aspect ratio for HD @1920×1080) within the player itself we would call this function with arguments of 16/9 and {width: 40, height: 50}.

web user
(Source: inventivetalent.org)

The second argument doesn't care where the extra width and height are within the content view--only that they exist. Sum any extra width and height areas you have within the overall content view.

Bounds Rectangle animate Boolean (optional) macOS Resizes and moves the window's client area (e.g. the web page) to the supplied bounds.

In normal state, rebounds and getNormalBounds returns the same Rectangle. Resizes the window's client area (e.g. the web page) to width and height.

By default, sheets are attached just below the window frame, but you may want to display them beneath an HTML-rendered toolbar. Other_id is used to identify web contents (tabs) so within the same top level window.

On Linux platform, only supports Unity desktop environment, you need to specify the *.desktop file name to desktopName field in package.Jason. Accepted values are none, normal, indeterminate, error, and paused.

(Source: www.youtube.com)

If you call setProgressBar without a mode set (but with a value within the valid range), normal will be assumed. Sets a 16 × 16 pixel overlay onto the current taskbar icon, usually used to convey some sort of application status or to passively notify the user.

Passing an empty list reverts the window to being rectangular. Outside the given region, no pixels will be drawn and no mouse events will be registered.

Returns a Boolean object indicates whether the thumbnail has been added successfully. The number of buttons in thumbnail toolbar should be no greater than 7 due to the limited room.

You can reset the thumbnail to be the entire window by specifying an empty region: {x: 0, y: 0, width: 0, height: 0} . Sets the tooltip that is displayed when hovering over the window thumbnail in the taskbar.

Sets whether the window traffic light buttons should be visible. Sets whether the window menu bar should hide itself automatically.

oxygen configuration electronic properties atoms webelements schematic periodic table structure
(Source: www.webelements.com)

Once set the menu bar will only show when users press the single Alt key. If the menu bar is already visible, calling setAutoHideMenuBar(true) won't hide it immediately.

Note that appearance-based, light, dark, medium-light, and ultra-dark have been deprecated and will be removed in an upcoming version of macOS. Set a custom position for the traffic light buttons.

This method only has an effect if the machine has a touch bar and is running on macOS 10.12.1+. Note: The Touchier API is currently experimental and may change or be removed in future Electron releases.

Replacement API for setBrowserView supporting work with multi browser views. Note: The BrowserView API is currently experimental and may change or be removed in future Electron releases.

Electron is a framework for creating native applications with web technologies like JavaScript, HTML, and CSS. Electron is an open source project maintained by GitHub and an active community of contributors.

electron graphene interactions bilayer quantum dots
(Source: www.researchgate.net)

Compatible with Mac, Windows, and Linux, Electron apps build and run on three platforms. Learn how to wrap your web app with Electron, access all the APIs, and generate installers.

Using the user agent to detect the browser looks simple, but doing it well is, in fact, a very hard problem. Also, experts, or people with another point of view, can give you ideas for working around the bug.

Your site needs to use a specific Web feature that some browsers don't yet support, and you want to send those users to an older Website with fewer features but that you know will work. This is the worst reason to use user agent detection because odds are eventually all the other browsers will catch up.

In those rare cases where behavior differs between browsers, instead of checking the user agent string, you should instead implement a test to detect how the browser implements the API and determine how to use it from that. Support could have been added to other browsers at any time, but this code would have continued choosing the inferior path.

As the above code demonstrates, there is always a way to test browser support without user agent sniffing. For example, in the above code snippets, using look behind in short-regexp notation (e.g. /reg/IGM) will cause a parser error in unsupported browsers.

electron affinity ppt powerpoint presentation end
(Source: www.slideserve.com)

Progressive enhancement This design technique involves developing your Website in 'layers', using a bottom-up approach, starting with a simpler layer and improving the capabilities of the site in successive layers, each using more features. Graceful degradation This is a top-down approach in which you build the best possible site using all the features you want, then tweak it to make it work on older browsers.

Rather, add in touch conveniences such as bigger, more easily clickable buttons (you can do this using CSS by increasing the font size). Here is an example of code that increases the padding of #exampleButton to 1em on mobile devices.

This effect can be easily achieved using CSS flex boxes, sometimes with floats as a partial fallback. Also try to move less relevant/important information down to the bottom and group the page's content together meaningfully. Although it is off-topic, perhaps the following detailed example might give you insights and ideas that persuade you to forgo user agent sniffing.

The boxes can be separated into multiple columns via two equally fair method. The second method uses a Column layout and resents all the dogs to the left and all the cats to the right.

Only in this particular scenario, it is appropriate to provide no fallback for the flex boxes/multi columns, resulting in a single column of very wide boxes on old browsers. If more people visit the webpage to see the cats, then it might be a good idea to put all the cats higher in the source code than the dogs so that more people can find what they are looking for faster on smaller screens where the content collapses down to one column. Next, always make your code dynamic.

pr
(Source: www.youtube.com)

The user can flip their mobile device on its side, changing the width and height of the page. Or, there might be some weird flip-phone-like device thing in the future where flipping it out extends the screen.

The simplest way to do this is to separate all the code that moves content around based on screen size to a single function that is called when the page is loaded and at each resize event thereafter. Also note that there is a huge difference between the media queries (max-width: 25em), not all and (min-width: 25em), and (max-width: 24.99em) : (max-width: 25em) excludes (max-width: 25em), whereas not all and (min-width: 25em) includes (max-width: 25em).

One such case is using user agent sniffing as a fallback when detecting if the device has a touch screen. Internet Explorer (on Windows) and WebKit (on iOS) are two perfect examples.

However, Internet Explorer was such a special little wasp exception prior to version 9 that it was very easy to detect the browser based upon the browser-specific features available. WebKit is a bit worse because Apple forces all the browsers on IOS to use WebKit internally, thus the user has no way to get a better more updated browser on older devices.

For example, WebKit 6 has a bug whereby when the device orientation changes, the browser might not fire MediaQueryList listeners when it should. Most browsers set the name and version in the format BrowserName/VersionNumber, with the notable exception of Internet Explorer.

(Source: github.com)

So to detect Safari you have to check for the Safari string and the absence of the Chrome string, Chromium often reports itself as Chrome too or Sea monkey sometimes reports itself as Firefox. Also, pay attention not to use a simple regular expression on the BrowserName, user agents also contain strings outside the Keyword/Value syntax.

Must containment not containFirefoxFirefox/xyzSeamonkey/xyzSeamonkeySeamonkey/xyzChromeChrome/chromium/xyzChromiumChromium/xyzSafariSafari/chrome/XYZ or Chromium/safari gives two version numbers: one technical in the Safari/XYZ token, and one user -friendly in a Version/XYZ tokenizer Opera 15+ (Blink-based engine) The browser version is often, but not always, put in the value part of the BrowserName/VersionNumber token in the Sergeant String.

There are five major rendering engines: Trident, Gecko, Presto, Blink, and WebKit. It is therefore important to pay attention not to trigger false-positives when detecting the rendering engine.

Must containGeckoGecko/xyzWebKitAppleWebKit/pay attention, WebKit browsers add a 'like Gecko' string that may trigger false positive for Gecko if the detection is not careful. PrestoOpera/XYZ Note: Presto is no longer used in Opera browser builds >= version 15 (see 'Blink')Trident Trident/Internet Explorer put this token in the comment part of the Sergeant StringEdgeHTMLEdge/the non-Chromium Edge puts its engine version after the Edge/ token, not the application version. Note: Edge HTML is no longer used in Edge browser builds >= version 79 (see 'Blink'). BlinkChrome/XYZ Most rendering engines put the version number in the RenderingEngine/VersionNumber token, with the notable exception of Gecko.

The Operating System is given in most Sergeant strings (although not web-focused platforms like Firefox OS), but the format varies a lot. They indicate the OS, but also often its version and information on the relying on hardware (32 or 64 bits, or Intel/PPC for Mac).

(Source: www.taylorfrancis.com)

Like in all cases, these strings may change in the future, one should use them only in conjunction with the detection of already released browsers. A technological survey must be in place to adapt the script when new browser versions are coming out.

The most common reason to perform user agent sniffing is to determine which type of device the browser runs on. Never assume that a browser or a rendering engine only runs on one type of device.

Never use the OS token to define if a browser is on mobile, tablet or desktop. Internet Explorer Immobile/XYZ token in the comment. Mozilla/5.0 (compatible; MSI 9.0; Windows Phone OS 7.5; Trident/5.0; Immobile/9.0)Edge on Windows 10 Mobile/XYZ & Edge/ tokens outside the comment. Mozilla/5.0 (Windows Phone 10.0; Android 6.0.1; Xbox; Xbox One) Apple WebKit/537.36 (HTML, like Gecko) Chrome/58.0.3029.110 Mobile Safari/537.36 Edge/16.16299In summary, we recommend looking for the string “Mob” anywhere in the Sergeant to detect a mobile device.

If the device is large enough that it's not marked with “Mob”, you should serve your desktop site (which, as a best practice, should support touch input anyway, as more desktop machines are appearing with touchscreens).

Related Videos

Other Articles You Might Be Interested In

01: Googlebot User Agent String
02: Google Chrome Change User Agent String
03: Google Chrome User Agent Mobile
04: Google Chrome User Agent String
05: Google Chrome User Agent Windows
06: Google Robot User Agent
07: Custom User Agent Internet Explorer 11
08: Custom User Agent String Internet Explorer
09: Facebook Browser User Agent
10: Facebook User Agent String
Sources
1 stackoverflow.com - https://stackoverflow.com/questions/8626812/how-to-recognize-facebook-user-agent
2 wordpress.org - https://wordpress.org/support/topic/facebook-user-agent-being-blocked-when-query-string-present/
3 developers.facebook.com - https://developers.facebook.com/docs/sharing/webmasters/crawler
4 mobiforge.com - https://mobiforge.com/research-analysis/webviews-and-user-agent-strings
5 deviceatlas.com - https://deviceatlas.com/blog/list-of-user-agent-strings
6 developers.whatismybrowser.com - https://developers.whatismybrowser.com/useragents/explore/
7 www.whatismybrowser.com - https://www.whatismybrowser.com/detect/what-is-my-user-agent
8 docs.microsoft.com - https://docs.microsoft.com/en-us/microsoft-edge/web-platform/user-agent-string