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How to realize the full-screen effect of Google browser in SpringBoot? for this problem, this article introduces the corresponding analysis and solution in detail, hoping to help more partners who want to solve this problem to find a simpler and easier way.

Project scenario:

In the customer requirements document, it is required to use Chrome Google browser to display the page under the Win10 system, but the high-level stakeholders hope that the page can be displayed in full screen to improve the user experience.

For the full-screen function of Google browser, the front-end implementation is no longer available. For security reasons, Google browser has blocked any event that calls full screen (user gesture user gesture is required). It has tried to capture the parameters of the click event triggered by user gestures, but found that there are too many event parameters (dense ε = ε = ┌ ( ("◇") ┘), too much effort to simulate and waste too much time (forget it ╮ (forget it) ╭).

Since the full-screen trigger keyboard button of Chrome Google browser is F11, I will sort out my thoughts with the goal of pressing F11. First, the page initialization sends a get request to the backend program interface, and the program receives the request to write a vbs script and generate a vbs script file to be saved on the Win10 default desktop path. Then the program runs the script and clicks F11 to complete the full screen effect. The flow chart is as follows:

Problem description:

The next problem is the permission problem encountered when the backend code executes and runs the vbs script, which is as follows:

Process process = Runtime.getRuntime () .exec (cmd); cause analysis:

If you run cmd without system administrator privileges to run the jar package, you will find that this code will not run and will not report an error, but it will not work (huh? I obviously pressed F11, but what about ◔ full screen ◔?) .

Solution:

Next, let's take a look at the code section, starting with the back-end program interface:

/ * * @ Author: Tony Peng * @ Date: 10:20 on 2021-7-9 * * / @ Slf4j@RestController@RequestMapping ("/ fullscreen") public class FullscreenController {@ GetMapping ("/ active") public void active (HttpServletRequest request) {/ / get the client IP used to write the String clientIp = request.getRemoteHost (); / / the file name of the desktop generation script, which can be customized String fileName = "F11" / / vbs script content String command = "set ws=createObject (\" WScript.Shell\ ")\ nws.SendKeys\" {F11}\ "; / / get the default desktop path of Win10. String fileUrl = FileSystemView.getFileSystemView (). GetHomeDirectory () +"\ "+ fileName +" .vbs "; / / generate vbs script files on the desktop File file = new File (fileUrl) Try {/ / judge here, if the file does not exist, write another if (! file.exists ()) {FileWriter fw = new FileWriter (fileUrl); fw.write (command); fw.close ();} String [] cmd = new String [] {"wscript", fileUrl} / / this line of code running the vbs script file requires system administrator privileges Process process = Runtime.getRuntime (). Exec (cmd); process.waitFor ();} catch (Exception e) {log.error ("client IP [{}] F11 call failed! Reason: "+ e.getMessage (), clientIp);} log.info (" client IP [{}] F11 call succeeded! " , clientIp);}} ("please _ collect)"

After writing the above interface, use your own compiler (occasionally use Di Su idea (● > ∀ NUL 2 > NUL if'% errorlevel%' = ='0' (goto gotPrivileges) else (goto getPrivileges): getPrivileges if'% 1 thanks thanks Elev'(echo ELEV & shift / 1 & goto gotPrivileges) ECHO. ECHO * * ECHO Invoking UAC for Privilege Escalation ECHO * * ECHO Set UAC = create object ^ ("Shell.Application" ^) > "% vbsGetPrivileges%" ECHO args = "ELEV" > > "% vbsGetPrivileges%" ECHO For Each strArg in WScript.Arguments > > "vbsGetPrivileges%" ECHO args = args ^ & strArg ^ & ">" vbsGetPrivileges% "ECHO Next > >" vbsGetPrivileges% "if 'cmdInvoke%'=='1' goto InvokeCmd ECHO UAC.ShellExecute"! batchPath! " Args, "", "runas", 1 > > "% vbsGetPrivileges%" goto ExecElevation:InvokeCmd @ ECHO OFF ECHO args = "/ c" + "! batchPath!" + "+ args > >"% vbsGetPrivileges% "ECHO Set ws = CreateObject (" Wscript.Shell ") ECHO UAC.ShellExecute"% SystemRoot%\% winSysFolder%\ cmd.exe ", args,"," runas " 1 > > "% vbsGetPrivileges%": ExecElevation "% SystemRoot%\% winSysFolder%\ WScript.exe"% vbsGetPrivileges%"% * exit / B:gotPrivileges @ ECHO OFF setlocal & cd / d% ~ dp0 if'% 1 (del "% vbsGetPrivileges%" 1 > nul 2 > nul & shift / 1): START: :: enter your code @ ECHO off start javaw-Dfile.encoding=utf-8-jar-Xmn128m-Xms256m-Xmx256m% ~ dp0\ fullscreen.jar here

First create a text file (suffix .txt), edit and enter the above code, change the file suffix to .bat, double-click to run (the jar package must be in the same directory as the batch file), and then start after two popups.

As a programmer, I feel fumigated (* ^ ▽ ^ *) if there is one less pop-up window, so I wrote another vbs script file to hide the first pop-up window. At present, I have not thought of how to hide the second pop-up window. If there is a great god to guide me, I can leave a message and make a supplement and declare that I would appreciate it. Thanks ♪ (ω)

The script to hide the first cmd pop-up window is as follows:

Set ws = CreateObject ("Wscript.Shell") ws.run "cmd / c D:\ Fullscreen\ fullscreen.bat", vbhide

PS: please change the drive letter path to the path of the batch file running the jar package.

At this time, it is almost done! ✿✿ (°▽ °) ✿

To supplement the front-end part, how to use JS to determine whether the current Google browser is full-screen, the code is as follows:

/ / Google browser determines that if it is not full screen, if (! (document.body.scrollHeight = window.screen.height & & document.body.scrollWidth = window.screen.width) {/ / send full screen request}

PS: the backend program jar package must be deployed on the same computer as the client, otherwise the full screen is invalid.

Source code link:

Https://github.com/tony901/Fullscreen

After reading it all, give me one button, three consecutive eight (* ^ ▽ ^ *) /

Sometimes go to the end of the water to find the source and flow, and sometimes sit and watch the ever-changing clouds.

This is the answer to the question on how to realize the full-screen effect of Google browser in SpringBoot. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel for more related knowledge.

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