CODEWITHSUNDEEP
javascriptgoogle-chromebase64blob
Michbeckable
Michbeckable

Reputation: 1881

Open blob objectURL in Chrome

I want to open a PDF in a new tab in chrome browser (Chrome 56.0.2924.87, Ubuntu 14.04) using window.open(fileObjectURL) in javascript. I am creating the blob from base64 encoded data and do create an objectURL like this:

const fileObjectURL = URL.createObjectURL(fileBlob);

It works fine in latest Firefox browser. But in Chrome I can see that the new tab gets opened but then closed immediately. So I don't get any error in the console etc. The only way it works in Chrome now is to give the base64 data directly to the window.open(fileBase64Data) function. But I don't like the complete data being set in the url.

Maybe this is a safety issue with Chrome blocking opening of blobs?

Upvotes: 47

Views: 79682

Answers (8)

Petro Jackson
Petro Jackson

Reputation: 1

Done, I just added the {type:"application/pdf"} or you just add the any content type.

Upvotes: -2

bgman
bgman

Reputation: 334

Unfortunately none of the above solutions worked. The new window still gets blocked in production, in development it works. Only Chrome blocks, in Edge it's all fine.

Upvotes: 1

Marvin Sankar
Marvin Sankar

Reputation: 19

I do not have Ad blocker. Looks like setting the blob type explicitly to application/pdf will solve this issue.

const newBlob = new Blob([blobData], {type: "application/pdf"});

Upvotes: -1

robrecht
robrecht

Reputation: 317

In plain vanilly javascript (because I don't have jquery)

let newWindow = window.open('/file.html');
newWindow.onload = () => {
    var blobHtmlElement;
    blobHtmlElement = document.createElement('object');
    blobHtmlElement.style.position = 'fixed';
    blobHtmlElement.style.top = '0';
    blobHtmlElement.style.left = '0';
    blobHtmlElement.style.bottom = '0';
    blobHtmlElement.style.right = '0';
    blobHtmlElement.style.width = '100%';
    blobHtmlElement.style.height = '100%';
    blobHtmlElement.setAttribute('type', 'application/pdf'); 
    blobHtmlElement.setAttribute('data', fileObjectURL);
    newWindow.document.title = 'my custom document title';
    newWindow.document.body.appendChild(blobHtmlElement);
};

/file.html is an almost empty html file, source:

<!DOCTYPE html>
<html lang="en">
<head>
</head>
<body>

</body>
</html>

Tested in chrome & firefox (on 20/november/2019)

Upvotes: 0

Youn Oh
Youn Oh

Reputation: 29

Work around way to by pass adblocker.

coffeescript & jquery

$object = $("<object>")
$object.css
  position: 'fixed'
  top: 0
  left: 0
  bottom: 0
  right: 0
  width: '100%'
  height: '100%'
$object.attr 'type', 'application/pdf'
$object.attr 'data', fileObjectURL
new_window = window.open()
new_window.onload = ->
  $(new_window.document.body).append $object

Upvotes: 2

Ali Jamal
Ali Jamal

Reputation: 1549

Salaam

blob:http://***.***.***.**/392d72e4-4481-4843-b0d4-a753421c0433

Blobs are not blocked by chrome but are blocked by AdBlock extension Either:

  • Pause on this site
  • Don't run on pages on this site
  • Or Disable or Remove AdBlock Extension

Don't run on pages on this site

Upvotes: 0

Ablai Tursumbekov
Ablai Tursumbekov

Reputation: 337

You must open new window before you put blob url in window:

let newWindow = window.open('/')

Also you can use some another page like /loading, with loading indicator.

Then you need to wait newWindow loading, and you can push url of your blob file in this window:

newWindow.onload = () => {
    newWindow.location = URL.createObjectURL(blob);
};

Adblock extension don't block it.

I'm using it with AJAX and ES generators like this:

let openPDF = openFile();
openPDF.next();
axios.get('/pdf', params).then(file => {
  openPDF.next(file);
});

function* openFile() {
  let newWindow = window.open('/pages/loading');
  // get file after .next(file)
  let file = yield;
  // AJAX query can finish before window loaded,
  // So we need to check document.readyState, else listen event
  if (newWindow.document.readyState === 'complete') {
    openFileHelper(newWindow, file);
  } else {
    newWindow.onload = () => {
      openFileHelper(newWindow, file);
    };
  }
}

function openFileHelper(newWindow, file) {
  let blob = new Blob([file._data], {type: `${file._data.type}`});
  newWindow.location = URL.createObjectURL(blob);
}

Upvotes: 22

bol89
bol89

Reputation: 886

The cause is probably adblock extension (I had exactly the same problem).

Upvotes: 87

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