Blob download is not working in IE

Question

I have this in my Angular.js controller that downloads a CSV file:

 var blob = new Blob([csvContent.join('')], { type: 'text/csv;charset=utf-8'});
 var link = document.createElementNS('http://www.w3.org/1999/xhtml', 'a');
 link.href = URL.createObjectURL(blob);
 link.download = 'teams.csv';
 link.click();

This works perfectly in Chrome but not in IE. A browser console log says:

HTML7007: One or more blob URLs were revoked by closing the blob for which they were created. These URLs will no longer resolve as the data backing the URL has been freed.

What does it mean and how can I fix it?

Answer 1

Try this using, this or useragent

if (navigator.appVersion.toString().indexOf('.NET') > 0)
        window.navigator.msSaveBlob(blob, filename);
else
{
 var blob = new Blob(['stringhere'], { type: 'text/csv;charset=utf-8' });
 var link = document.createElementNS('http://www.w3.org/1999/xhtml', 'a');
 link.href = URL.createObjectURL(blob);
 link.download = 'teams.csv';
 link.click();
}

Answer 2

IE won't allow you to open blobs directly. You have to use msSaveOrOpenBlob. There's also msSaveBlob

if (window.navigator && window.navigator.msSaveOrOpenBlob) {
    window.navigator.msSaveOrOpenBlob(blob, fileName);
} else {
    var objectUrl = URL.createObjectURL(blob);
    window.open(objectUrl);
}

Answer 3

I needed to use a Blob to download a converted a base64 PNG image. I was able to successfully download the blob on IE11 with window.navigator.msSaveBlob

See the following msdn link: http://msdn.microsoft.com/en-us/library/hh779016(v=vs.85).aspx

Specifically, you should call:

window.navigator.msSaveBlob(blobObject, 'msSaveBlob_testFile.txt');

where blobObject is a Blob created in the usual fashion.

Answer 4

Complete Solution for Chrome, Internet Explorer Firefox and Opera

There are lots of nice bits on this page, but I had to use a combination of a few things to get it all to work. Hopefully this helps you.

1. Use a button or link to trigger a function called download():

<button class="button-no save-btn" ng-click="download()">DOWNLOAD</button>

2. Put this in your controller:

$scope.download = function () {

    // example shows a JSON file
    var content = JSON.stringify($scope.stuffToPutInFile, null, "  ");
    var blob = new Blob([content], {type: 'application/json;charset=utf-8'});

    if (window.navigator && window.navigator.msSaveBlob) {

        // Internet Explorer workaround
        $log.warn("Triggering download using msSaveBlob");
        window.navigator.msSaveBlob(blob, "export.json");

    } else {
        
        // other browsers
        $log.warn("Triggering download using webkit");
        var url = (window.URL || window.webkitURL).createObjectURL(blob);
        
        // create invisible element
        var downloadLink = angular.element('<a></a>');
        downloadLink.attr('href', url);
        downloadLink.attr('download', 'export.json');
        
        // make link invisible and add to the DOM (Firefox)
        downloadLink.attr('style','display:none');
        angular.element(document.body).append(downloadLink);
        
        // trigger click
        downloadLink[0].click();
    }
};

Answer 5

What's your IE browser version? You need a modern browser or IE10+ http://caniuse.com/bloburls

Answer 6

Maybe you need some delay. What about with:

link.click();
setTimeout(function(){
    document.body.createElementNS('http://www.w3.org/1999/xhtml', 'a');
    URL.revokeObjectURL(link.href);  
}, 100);

Answer 7

I needed to get the download feature to work in Chrome and IE11. I had good success with this code.

HTML

<div ng-repeat="attachment in attachments">
  <a ng-click="openAttachment(attachment)" ng-href="{{attachment.fileRef}}">{{attachment.filename}}</a>
</div>

JS

$scope.openAttachment = function (attachment) {
  if (window.navigator && window.navigator.msSaveOrOpenBlob) {
    window.navigator.msSaveOrOpenBlob(
      b64toBlob(attachment.attachment, attachment.mimeType),
      attachment.filename
    );
  }
};

Answer 8

Done it this way, working fine for me.

downloadFile(data) {
    if (navigator.msSaveBlob) {
      let blob = new Blob([data], {
        "type": "text/csv;charset=utf8;"
      });
      navigator.msSaveBlob(blob, this.fileName);
    }
    else {
      let blob = new Blob(['\ufeff' + data], { type: 'text/csv;charset=utf-8;' });
      let $link = document.createElement("a");
      let url = URL.createObjectURL(blob);
      $link.setAttribute("target", "_blank");
      $link.setAttribute("href", url);
      $link.setAttribute("download", this.fileName);
      $link.style.visibility = "hidden";
      document.body.appendChild($link);
      $link.click();
      document.body.removeChild($link);
    }
  }

Answer 9

Try to use this instead : var blob = file.slice(0, file.size);

Answer 10

Create polyfill method as below,had a variable filename since in my case download filename was static.This method will be called while blob function is not supported as in case of Internet explorer

    if (!HTMLCanvasElement.prototype.toBlob) {
            Object.defineProperty(HTMLCanvasElement.prototype, 
            'toBlob', {
                value: function (callback, type, quality) {
                var canvas = this;
                setTimeout(function () {
                var binStr = atob(canvas.toDataURL(type, quality).split(',')[1]),
                    len = binStr.length,
                    arr = new Uint8Array(len);

                for (var i = 0; i < len; i++) {
                    arr[i] = binStr.charCodeAt(i);
                }
                var blob = new Blob([arr], {
                    type: 'image/png'
                });
                window.navigator.msSaveOrOpenBlob(blob, fileName);
            });
        }
    });
}

Answer 11

try {
      const blob = new Blob([res.body], {
        type: res.headers.get('Content-Type'),
      });
      const file = new File([blob], this.getFileName(res), {
        type: res.headers.get('Content-Type'),
      });

      saveAs(file);
    } catch (err) {
      var textFileAsBlob = new Blob([res.body], {
        type: res.headers.get('Content-Type'),
      });
      window.navigator.msSaveBlob(textFileAsBlob, this.getFileName(res));
    }

To get the file name. Use the below function.

getFileName(response: any) {
    let name: string;
    try {
      const contentDisposition: string = response.headers.get(
        'content-disposition'
      );
      const [, filename] = contentDisposition.split('filename=');
      name = filename;
    } catch (e) {
      name = 'File_Name_Not_Specified_' + new Date();
    }
    return name;
  }

This worked for me.