How to check if a download is complete using PHP or JavaScript?

Question

I can create dynamic download link with expire time using PHP. But I want to delete the link when the user completed the download. Is there any way to know when the user has completed the download with PHP or JavaScript?

Answer 1

使用php页面处理用户的下载请求，这将触发它在短时间内将其删除吗？

Answer 2

This is typically handled client side.

You can find a very nice answer to a related question here .

The way I handle that is using jQuery. In JavaScript I launch downloads asynchronously and the calling function allows to call a callback function. In this callback function you can empty the div corresponding to your download link and potentially send a message to the server.

    // have a div in your document to call this JavaScript script
    // first get the file in local memory
    var file = "myfile.csv";
    $.get(file, function(data){
        // everything here will be done only when the download is finished
        // in particular you want the user to be able to get the file using 
         mydoc.execCommand("saveAs",true,".txt");

        // as described 
        // here: http://www.webdeveloper.com/forum/showthread.php?12509-how-to-pop-up-Save-As-Window

        // you can also change the div containing the link/button activating the download 
        // and possibly send the server a download OK signal

});