How to get loading progress for an html BLOB with javascript

0

Basically what I'm trying to do is download a file (around 10mb) and show progress percentage on page for the download progress. I can't use the normal html attribute download="filename.jpg" because the file is not hosted on the same domain. Chrome won't allow cross domain downloads anymore. My workaround for this is loading then downloading the file as a BLOB object via javascript. I have this working however I need to figure out a way to get the progress percentage of the download and display it on the page or console.log(progress). I have my code attached. If someone could please help me out on this I would appreciate it.

#downloadButton {

  background:#000;

  color:#FFF;

  padding:10px;

  cursor:pointer;

}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.2.3/jquery.min.js"></script>



<div id="downloadButton">

Click here to download file

</div>



<script>

function forceDownload(blob, filename) {

  var a = document.createElement('a');

  a.download = filename;

  a.href = blob;

  a.click();

}



// Current blob size limit is around 500MB for browsers

function downloadResource(url, filename) {

  if (!filename) filename = url.split('\').pop().split('/').pop();

  if (url.indexOf(".zip") !== -1 || url.indexOf(".rar") !== -1) {

      $("#downloadButton").removeClass("loading");

      forceDownload(url, filename);

  } else {

  fetch(url, {

      headers: new Headers({

        'Origin': location.origin

      }),

      mode: 'cors'

    })

    .then(response => response.blob())

    .then(blob => {

      let blobUrl = window.URL.createObjectURL(blob);

      $("#downloadButton").removeClass("loading");

      forceDownload(blobUrl, filename);

    })

    .catch(e => {

    $("#downloadButton").removeClass("loading");

    $("#downloadButton").addClass("error");

    console.error(e);

    });

}

}



$("#downloadButton").click(function() {

$("#downloadButton").addClass("loading");

$('<div id="notification"><span>Starting download...</span></div>').prependTo('body');

setTimeout(function() {$("#notification").fadeOut()}, 6000);

downloadResource("https://share.dmca.gripe/a7Bcp5j4zSRL9WIV.m4a","audio.m4a");

});

//]]>

</script>

javascript html blob

share|improve this question

asked Nov 20 '18 at 18:56

Riley BellRiley Bell

587

add a comment | 

0

Basically what I'm trying to do is download a file (around 10mb) and show progress percentage on page for the download progress. I can't use the normal html attribute download="filename.jpg" because the file is not hosted on the same domain. Chrome won't allow cross domain downloads anymore. My workaround for this is loading then downloading the file as a BLOB object via javascript. I have this working however I need to figure out a way to get the progress percentage of the download and display it on the page or console.log(progress). I have my code attached. If someone could please help me out on this I would appreciate it.

#downloadButton {

  background:#000;

  color:#FFF;

  padding:10px;

  cursor:pointer;

}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.2.3/jquery.min.js"></script>



<div id="downloadButton">

Click here to download file

</div>



<script>

function forceDownload(blob, filename) {

  var a = document.createElement('a');

  a.download = filename;

  a.href = blob;

  a.click();

}



// Current blob size limit is around 500MB for browsers

function downloadResource(url, filename) {

  if (!filename) filename = url.split('\').pop().split('/').pop();

  if (url.indexOf(".zip") !== -1 || url.indexOf(".rar") !== -1) {

      $("#downloadButton").removeClass("loading");

      forceDownload(url, filename);

  } else {

  fetch(url, {

      headers: new Headers({

        'Origin': location.origin

      }),

      mode: 'cors'

    })

    .then(response => response.blob())

    .then(blob => {

      let blobUrl = window.URL.createObjectURL(blob);

      $("#downloadButton").removeClass("loading");

      forceDownload(blobUrl, filename);

    })

    .catch(e => {

    $("#downloadButton").removeClass("loading");

    $("#downloadButton").addClass("error");

    console.error(e);

    });

}

}



$("#downloadButton").click(function() {

$("#downloadButton").addClass("loading");

$('<div id="notification"><span>Starting download...</span></div>').prependTo('body');

setTimeout(function() {$("#notification").fadeOut()}, 6000);

downloadResource("https://share.dmca.gripe/a7Bcp5j4zSRL9WIV.m4a","audio.m4a");

});

//]]>

</script>

javascript html blob

share|improve this question

asked Nov 20 '18 at 18:56

Riley BellRiley Bell

587

add a comment | 

0

0

0

1

Basically what I'm trying to do is download a file (around 10mb) and show progress percentage on page for the download progress. I can't use the normal html attribute download="filename.jpg" because the file is not hosted on the same domain. Chrome won't allow cross domain downloads anymore. My workaround for this is loading then downloading the file as a BLOB object via javascript. I have this working however I need to figure out a way to get the progress percentage of the download and display it on the page or console.log(progress). I have my code attached. If someone could please help me out on this I would appreciate it.

#downloadButton {

  background:#000;

  color:#FFF;

  padding:10px;

  cursor:pointer;

}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.2.3/jquery.min.js"></script>



<div id="downloadButton">

Click here to download file

</div>



<script>

function forceDownload(blob, filename) {

  var a = document.createElement('a');

  a.download = filename;

  a.href = blob;

  a.click();

}



// Current blob size limit is around 500MB for browsers

function downloadResource(url, filename) {

  if (!filename) filename = url.split('\').pop().split('/').pop();

  if (url.indexOf(".zip") !== -1 || url.indexOf(".rar") !== -1) {

      $("#downloadButton").removeClass("loading");

      forceDownload(url, filename);

  } else {

  fetch(url, {

      headers: new Headers({

        'Origin': location.origin

      }),

      mode: 'cors'

    })

    .then(response => response.blob())

    .then(blob => {

      let blobUrl = window.URL.createObjectURL(blob);

      $("#downloadButton").removeClass("loading");

      forceDownload(blobUrl, filename);

    })

    .catch(e => {

    $("#downloadButton").removeClass("loading");

    $("#downloadButton").addClass("error");

    console.error(e);

    });

}

}



$("#downloadButton").click(function() {

$("#downloadButton").addClass("loading");

$('<div id="notification"><span>Starting download...</span></div>').prependTo('body');

setTimeout(function() {$("#notification").fadeOut()}, 6000);

downloadResource("https://share.dmca.gripe/a7Bcp5j4zSRL9WIV.m4a","audio.m4a");

});

//]]>

</script>

javascript html blob

share|improve this question

asked Nov 20 '18 at 18:56

Riley BellRiley Bell

587

Basically what I'm trying to do is download a file (around 10mb) and show progress percentage on page for the download progress. I can't use the normal html attribute download="filename.jpg" because the file is not hosted on the same domain. Chrome won't allow cross domain downloads anymore. My workaround for this is loading then downloading the file as a BLOB object via javascript. I have this working however I need to figure out a way to get the progress percentage of the download and display it on the page or console.log(progress). I have my code attached. If someone could please help me out on this I would appreciate it.

#downloadButton {

  background:#000;

  color:#FFF;

  padding:10px;

  cursor:pointer;

}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.2.3/jquery.min.js"></script>



<div id="downloadButton">

Click here to download file

</div>



<script>

function forceDownload(blob, filename) {

  var a = document.createElement('a');

  a.download = filename;

  a.href = blob;

  a.click();

}



// Current blob size limit is around 500MB for browsers

function downloadResource(url, filename) {

  if (!filename) filename = url.split('\').pop().split('/').pop();

  if (url.indexOf(".zip") !== -1 || url.indexOf(".rar") !== -1) {

      $("#downloadButton").removeClass("loading");

      forceDownload(url, filename);

  } else {

  fetch(url, {

      headers: new Headers({

        'Origin': location.origin

      }),

      mode: 'cors'

    })

    .then(response => response.blob())

    .then(blob => {

      let blobUrl = window.URL.createObjectURL(blob);

      $("#downloadButton").removeClass("loading");

      forceDownload(blobUrl, filename);

    })

    .catch(e => {

    $("#downloadButton").removeClass("loading");

    $("#downloadButton").addClass("error");

    console.error(e);

    });

}

}



$("#downloadButton").click(function() {

$("#downloadButton").addClass("loading");

$('<div id="notification"><span>Starting download...</span></div>').prependTo('body');

setTimeout(function() {$("#notification").fadeOut()}, 6000);

downloadResource("https://share.dmca.gripe/a7Bcp5j4zSRL9WIV.m4a","audio.m4a");

});

//]]>

</script>

#downloadButton {

  background:#000;

  color:#FFF;

  padding:10px;

  cursor:pointer;

}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.2.3/jquery.min.js"></script>



<div id="downloadButton">

Click here to download file

</div>



<script>

function forceDownload(blob, filename) {

  var a = document.createElement('a');

  a.download = filename;

  a.href = blob;

  a.click();

}



// Current blob size limit is around 500MB for browsers

function downloadResource(url, filename) {

  if (!filename) filename = url.split('\').pop().split('/').pop();

  if (url.indexOf(".zip") !== -1 || url.indexOf(".rar") !== -1) {

      $("#downloadButton").removeClass("loading");

      forceDownload(url, filename);

  } else {

  fetch(url, {

      headers: new Headers({

        'Origin': location.origin

      }),

      mode: 'cors'

    })

    .then(response => response.blob())

    .then(blob => {

      let blobUrl = window.URL.createObjectURL(blob);

      $("#downloadButton").removeClass("loading");

      forceDownload(blobUrl, filename);

    })

    .catch(e => {

    $("#downloadButton").removeClass("loading");

    $("#downloadButton").addClass("error");

    console.error(e);

    });

}

}



$("#downloadButton").click(function() {

$("#downloadButton").addClass("loading");

$('<div id="notification"><span>Starting download...</span></div>').prependTo('body');

setTimeout(function() {$("#notification").fadeOut()}, 6000);

downloadResource("https://share.dmca.gripe/a7Bcp5j4zSRL9WIV.m4a","audio.m4a");

});

//]]>

</script>

#downloadButton {

  background:#000;

  color:#FFF;

  padding:10px;

  cursor:pointer;

}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.2.3/jquery.min.js"></script>



<div id="downloadButton">

Click here to download file

</div>



<script>

function forceDownload(blob, filename) {

  var a = document.createElement('a');

  a.download = filename;

  a.href = blob;

  a.click();

}



// Current blob size limit is around 500MB for browsers

function downloadResource(url, filename) {

  if (!filename) filename = url.split('\').pop().split('/').pop();

  if (url.indexOf(".zip") !== -1 || url.indexOf(".rar") !== -1) {

      $("#downloadButton").removeClass("loading");

      forceDownload(url, filename);

  } else {

  fetch(url, {

      headers: new Headers({

        'Origin': location.origin

      }),

      mode: 'cors'

    })

    .then(response => response.blob())

    .then(blob => {

      let blobUrl = window.URL.createObjectURL(blob);

      $("#downloadButton").removeClass("loading");

      forceDownload(blobUrl, filename);

    })

    .catch(e => {

    $("#downloadButton").removeClass("loading");

    $("#downloadButton").addClass("error");

    console.error(e);

    });

}

}



$("#downloadButton").click(function() {

$("#downloadButton").addClass("loading");

$('<div id="notification"><span>Starting download...</span></div>').prependTo('body');

setTimeout(function() {$("#notification").fadeOut()}, 6000);

downloadResource("https://share.dmca.gripe/a7Bcp5j4zSRL9WIV.m4a","audio.m4a");

});

//]]>

</script>

javascript html blob

javascript html blob

share|improve this question

asked Nov 20 '18 at 18:56

Riley BellRiley Bell

587

share|improve this question

asked Nov 20 '18 at 18:56

Riley BellRiley Bell

587

share|improve this question

share|improve this question

asked Nov 20 '18 at 18:56

Riley BellRiley Bell

587

asked Nov 20 '18 at 18:56

Riley BellRiley Bell

587

asked Nov 20 '18 at 18:56

Riley BellRiley Bell

587

587

add a comment | 

add a comment | 

0

active

oldest

votes

Your Answer

StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});


}
});

Thanks for contributing an answer to Stack Overflow!

• Please be sure to answer the question. Provide details and share your research!

But avoid …

• Asking for help, clarification, or responding to other answers.


• Making statements based on opinion; back them up with references or personal experience.

To learn more, see our tips on writing great answers.

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name

Email

Required, but never shown

StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53399744%2fhow-to-get-loading-progress-for-an-html-blob-with-javascript%23new-answer', 'question_page');
}
);

Post as a guest

Name

Email

Required, but never shown

0

active

oldest

votes

0

active

oldest

votes

active

oldest

votes

active

oldest

votes

Thanks for contributing an answer to Stack Overflow!

• Please be sure to answer the question. Provide details and share your research!

But avoid …

• Asking for help, clarification, or responding to other answers.


• Making statements based on opinion; back them up with references or personal experience.

To learn more, see our tips on writing great answers.

draft saved

draft discarded

Thanks for contributing an answer to Stack Overflow!

• Please be sure to answer the question. Provide details and share your research!

But avoid …

• Asking for help, clarification, or responding to other answers.


• Making statements based on opinion; back them up with references or personal experience.

To learn more, see our tips on writing great answers.

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name

Email

Required, but never shown

StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53399744%2fhow-to-get-loading-progress-for-an-html-blob-with-javascript%23new-answer', 'question_page');
}
);

Post as a guest

Name

Email

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name

Email

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name

Email

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name

Email

Required, but never shown

Name

Name

Email

Required, but never shown

Email

Required, but never shown

Email

Required, but never shown

Email

Required, but never shown

Name

Name

Email

Required, but never shown

Email

Required, but never shown

Email

Required, but never shown

Email

Required, but never shown

This page is only for reference, If you need detailed information, please check here