How to Prevent users from performing other operations on webpages during file download?

When downloading files on a webpage, sometimes the file is too large and it takes some time to generate the file. To prevent other operations on the webpage, you can use a div to overwrite the webpage and lock the webpage.

function lockScreen() { sWidth=$(window).width(); sHeight=$(window).height(); var bgObj=document.createElement("div"); bgObj.setAttribute('id','bgDiv'); bgObj.style.position="absolute"; bgObj.style.top="0"; bgObj.style.background="#CCCCCC"; bgObj.style.filter="progid:DXImageTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=75"; bgObj.style.opacity="0.6"; bgObj.style.left="0"; bgObj.style.width=sWidth + "px"; bgObj.style.height=sHeight + "px"; if(sWidth < 860) { bgObj.style.width="860px"; } bgObj.style.zIndex = "10000"; document.body.appendChild(bgObj); }

Use the above function to lock the page to prevent multiple operations. You need to cancel the screen lock when the download box appears.

Set the cookie on the server (cgi:

<pre name="code" class="cpp">char *configDownloadToken = "finishedDownloadFile"; printf("Content-Type: application/octet-stream\nContent-Length: %ld\n", s.st_size); printf( "Set-Cookie:configDownloadToken=%s; path=/; \r\n ",configDownloadToken); printf("Content-Disposition: attachment; filename=\"%s\"\n", strrchr(filename,'/') + 1); printf("Connection: close\n\n");

Import the jquery. cookie. js plug-in on the client (html, js). Include this plug-in the html file, and regularly obtain the cookie in the js file.

var configDownloadCheckTimer; $(document).ready(function () { configDownloadCheckTimer = window.setInterval(function() { var cookieValue = $.cookie('configDownloadToken'); if (cookieValue === "finishedDownloadFile") { refreshPage(); finishDownload(); } }, 1000); }); function finishDownload() { window.clearInterval(configDownloadCheckTimer); $.removeCookie('configDownloadToken'); //clears this cookie value } 

In this way, you can.