如何使用javascript或jquery在磁盘上的特定位置下载文件？

Question

i want to download a file automatically using javascript or jquery below is the code which i am using but that code open the file in new tab in browser not download in disk.

function SaveToDisk(fileUrl, fileName) {
    var hyperlink = document.createElement('a');
    hyperlink.href = fileUrl;
    hyperlink.target = '_blank';
    hyperlink.download = fileName || fileUrl;

    (document.body || document.documentElement).appendChild(hyperlink);
    hyperlink.onclick = function() {
       (document.body || document.documentElement).removeChild(hyperlink);
    };

    var mouseEvent = new MouseEvent('click', {
        view: window,
        bubbles: true,
        cancelable: true
    });

    hyperlink.dispatchEvent(mouseEvent);

    // NEVER use "revoeObjectURL" here
    // you can use it inside "onclick" handler, though.
    // (window.URL || window.webkitURL).revokeObjectURL(hyperlink.href);

    // if you're writing cross-browser function:
    if(!navigator.mozGetUserMedia) { // i.e. if it is NOT Firefox
       window.URL.revokeObjectURL(hyperlink.href);
    }
}


        SaveToDisk('http://example.com/service/getUserImage/339/256', 'image.png');

Answer 1

Use XMLHttpRequest() to request file from server as a Blob , utilize URL.createObjectURL() , <a> element with download attribute and href attribute set to Blob URL , then call .click() on <a> element.

var request = new XMLHttpRequest();
request.open("GET", "http://example.com/service/getUserImage/339/256");
request.responseType = "blob";
request.onload = function() {
  var a = document.createElement("a");
  a.href = URL.createObjectURL(this.response);
  a.download = this.response.name;
  document.body.appendChild(a);
  a.click();
}
request.send();

Answer 2

try the following:

Create a hidden link when the ajax is complete with a attribute of download,trigger a click event on that link

$('body').append('<a class="hidden-ajax" download href="'+url+'"></a>')
$('.hidden-ajax').trigger('click');

Answer 3

JS

function(url){
   window.href(url);
}

Answer 4

var count=0;
$('#testdownload').on('click', function(){
count++;
$('#log').append('<li>Click triggered ' + count + ' times</li>');
});

$('#testdownload').get(0).click();

Demo