Download byte array into file in Internet Explorer and Microsoft Edge - javascript

I want to download byte array into file in Internet Explorer and Microsoft Edge using javascript(c#). Anchor.download element is not supported in these browsers.
I have searched a lot and nothing seem to work out. Please help me find a solution.
I have tried Window.location=url.
I have tried solution suggested in following:
Saving binary data as file using JavaScript from a browser the Blob.js and FileSaver.js is not supported and even that is not working.
I need a proper solution where I can download the file with its extension and proper name. I have the data in byte array, I have the name of the file with extension. It is working in Chrome but not in other browsers.
Following is the working code for Chrome :-
var sampleBytes = new Int8Array(responsetext);
var saveByteArray = (function () {
var a = document.createElement("a");
document.body.appendChild(a);
a.style = "display: none";
return function (data, DocName) {
var blob = new Blob(data, { type: "octet/stream" }),
url = window.URL.createObjectURL(blob);
a.href = url;
a.download = DocName;
a.click();
window.URL.revokeObjectURL(url);
};
}());
saveByteArray([sampleBytes],DocName);

Related

Download PDF from url react

I have a publicly accessible url to a PDF in Google Cloud Storage. I want to be able to create a button/link in react which allows users to download this PDF to their own computer. I'm wondering what is the best approach to do this and which libraries would be of help? Is there any documentation on this? Thanks
In order to force download a file, you have a number of options. First, the easiest is using the download attribute of an anchor tag:
PDF
However, this is not supported on IE and a number of other browsers in their earlier versions. But the maximum impact of this is it will open in a new tab which in my opinion is graceful degradation. See the full list of supported versions.
If this is not enough, you have to make some changes server-side. You can configure a server in many ways, but as an example, a .htaccess file can have the following:
<Files *.pdf>
Header set Content-Disposition attachment
</Files>
You can dynamically generate a link or button. Snippet bellow:
var sampleBytes = new Int8Array(4096); // In your case it should be your file
var saveByteArray = (function () {
var a = document.createElement("a");
document.body.appendChild(a);
a.style = "display: none";
return function (data, name) {
var blob = new Blob(data, {type: "octet/stream"}), // or application/pdf
url = window.URL.createObjectURL(blob);
a.href = url;
a.download = name;
a.click();
window.URL.revokeObjectURL(url);
};
}());
saveByteArray([sampleBytes], 'example.txt'); // You can define the filename

Download pdf without opening in browser

I want to download pdf file directly without viewing, i have tries following things till now but nothing is helping.
1- window.open("https://s3-link1.pdf", 'Download');
2- <a href="https://s3-link1.pdf" download>Link</a>
Link - https://s3-link1.pdf
Assume my domain is https://www.somedomain.com
I somewhere read we can't download cross-origin files. content-disposition header is required to be passed from backend. I am puzzled here. Another csv file of cross-origin is being downloaded easily.
https://s3-link2.csv
I just need to download pdf file using javascript. Please guide me.
Try with fetch.
fetch("https://s3-link1.pdf", {
method: 'GET'
}).then(resp => resp.blob())
.then(blob => {
const url = window.URL.createObjectURL(blob);
const a = document.createElement('a');
a.style.display = 'none';
a.href = url;
a.download = "name"; // the filename you want
document.body.appendChild(a);
a.click();
window.URL.revokeObjectURL(url);
})
Option 1:
with jQuery you can try this:
$.get("https://s3-link1.pdf", function (result)
{
var blob = new Blob([result]);
var link = document.createElement('a');
link.href = window.URL.createObjectURL(blob);
link.download = "myFileName.pdf";
link.click();
});
Option 2:
The download attribute works in all modern browsers, including MS Edge, but not Internet Explorer.
In the latest versions of Chrome, you cannot download cross-origin files (they have to be hosted on the same domain).
<a href="https://s3-link1.pdf" download>Download PDF</a>
Find more about it here on this blog: https://actualwizard.com/html-force-download-file

Large file downloads via ajax call give "Network Error" in Chrome browser

So I am trying to download a zip file with an ajax call to my api. The api responds with a base 64 encoded byte array. Now for most of the downloads this is working just fine, but when the zip file gets too large it starts to fail in Chrome. Works fine in all other browsers. From what I have found on stack overflow this is a known issue in chrome, and people suggested using blobs. Thing is I am using blobs and still have the issue. Here is my code for handling the download. I use this to download pdf and zip files by passing in different values for contentType. Has anyone run into this issue before? Are there any work arounds or scripts I can add to the page that will remedy this problem?
// data is base 64 encoded byte array
function download(data, filename, contentType) {
var byteCharacters = atob(data);
var byteNumbers = new Array(byteCharacters.length);
for (var i = 0; i < byteCharacters.length; i++) {
byteNumbers[i] = byteCharacters.charCodeAt(i);
}
var byteArray = new Uint8Array(byteNumbers);
var blob = new Blob([byteArray], { type: contentType });
if (window.navigator && window.navigator.msSaveOrOpenBlob) {
// IE / edge workaround
window.navigator.msSaveOrOpenBlob(blob, filename);
} else if (navigator.userAgent.indexOf("Firefox") > 0) {
var a = window.document.createElement('a');
a.download = filename;
a.style.cssText = "display: none";
a.target = "_blank";
// Append anchor to body.
document.body.appendChild(a);
a.href = "data:" + contentType + ";base64," + data;
a.click();
// Remove anchor from body
document.body.removeChild(a);
} else //Chrome, safari, etc
{
var a = document.createElement("a");
a.style = "display: none";
var url = window.URL.createObjectURL(blob);
a.href = url;
a.download = filename;
a.click();
window.URL.revokeObjectURL(url);
}
}
The api responds with a base 64 encoded byte array
Why? I'm suggesting you to add a method which will respond with pure binary zip files.
When set xhr.responseType = "blob"; and just save it like you do it for Chrome.
If you want to keep your api as is, try to get rid of Array and fill in Uint8Array straightway.
UPD. I tested this on my Chrome 69 under Ubuntu 18.04 with 16gb RAM and I found that Chrome would not let me download much more than 1000 megabytes this way.
How large are file you are trying to download?
Check it by yourself (don't forget to make sure that nothing will block downloading):
function getBlob(size) {
let u8a = new Uint8Array(size);
for (var i = 0; i < size; i++) {
u8a[i] = 33 + Math.floor(Math.random() * 5)
}
return new Blob([u8a]);
}
function downloadFile(source, filename) {
if (source instanceof (File, Blob)) {
filename = source.name || filename;
source = URL.createObjectURL(source);
}
let link = document.createElement("a");
link.style.display = "none";
link.href = source;
link.download = filename || "blob.bin";
document.body.appendChild(link);
link.click();
setTimeout(function () {
document.body.removeChild(link);
URL.revokeObjectURL(source);
}, 3000);
}
Size (MB): <input id="in" type=number min=1 max=3000>
<button onclick="downloadFile(getBlob(1024*1024*(+document.getElementById('in').value)))">download</button>
Seems to be a bug. In the meantime of it being resolved here's what you could do.
Split the file into smaller parts, and make many ajax requests, then when everything has been downloaded reconstruct the original file client side by concatenating the parts. From there proceed as normal.
Problem with large blob download is mostly about memory leak.
Some additional code can solve this problem, I think.
Your blob is storing in memory, and if it very large is bad,
because browser process has limit of available memory. This can
solve indexedDB indexeddb example, You should add a blob to
indexedDB and then immideately remove from it. When you writing blob
to indexeddb, browser creates cached file at file system, and from
this moment your blob will be stored at file system, like a File.
And this action will free a lot of memory.
When you create
ObjectUrl, you will have an additional link of blob in memory, and
garbage collector will remove it, only on document unload event. So
you need to revokeObjectURL.
var previousBlob = null;
downloadFile(source, filename) {
if(previousBlob){
URL.revokeObjectURL(previousBlob);
previousBlob = null;
}
//.. do stuff
}
P.S.
IndexedDB helped me solve one bug of Chrome. In the Chrome browser you can't create 1000 blobs (totaly in all opened tabs), so I solve this problem by writing blobs to indexeddb.Because blobs became a files and limit of blobs don't sprad on it. You can see the result by you own yeys at firefox "about:memory" tool, is the best tool of prifiling memory (better then other browsers)
In addition to these solution methods above you can also try to set maxRequestLength property in the web.config.
<system.web>
...
<httpRuntime targetFramework="4.5.1" maxRequestLength="51200" executionTimeout="30" />
<!-- for 50 MB set maxRequestLength="51200"-->
</system.web>
Hope this helps...

Dynamically created Anchor tag click method not downloading file in internet explore 11

Anchor tag not downloading file in IE, instead it gives the option to search for app in app store to open file. For chrome and FF this code is working fine. I don't know this is happening in windows 7 or not as I am using windows 8.1 and windows 7 don't have option for apps.
var a = document.createElement("a");
a.href = filepath;
a.download = filename;
a.click();
Any help will be highly appreciated.
Thanks.
Directly quoting from SOpost
Internet Explorer does not presently support the Download attribute on A tags.
See http://caniuse.com/download and http://status.modern.ie/adownloadattribute; the latter indicates that the feature is "Under consideration" for IE12.
this might help:
var blob = new Blob([response.responseText], { type: headers['content-type'] });
if (navigator.msSaveOrOpenBlob) {
//Launches the associated application for a File or Blob saving for non webkit based browser such as safari or IE
navigator.msSaveOrOpenBlob(blob, "cvSummary.xml");
}
else {
//code for webkit based browser
var link = document.createElement('a');
document.body.appendChild(link);
link.style = "display: none";
var url = window.URL.createObjectURL(blob);
link.href = window.URL.createObjectURL(blob);
link.download = "cvSummary.xml";
link.dataset.downloadurl = ["text/xml", link.download, link.href].join(':');
link.click();
window.URL.revokeObjectURL(url);
}

Saving binary data as file using JavaScript from a browser

I am working on a business application using angularJS. One of my service method returning me a byte[] (inclding PDF file content) now i need to download this file as PDF to client machine using JavaScript.
How is that possible using HTML5 Apis or any JavaScript API?
I have used window.atob(base64String)
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
but getting this following error Failed to execute 'atob' on 'Window': The string to be decoded is not correctly encoded.
This is possible if the browser supports the download property in anchor elements.
var sampleBytes = new Int8Array(4096);
var saveByteArray = (function () {
var a = document.createElement("a");
document.body.appendChild(a);
a.style = "display: none";
return function (data, name) {
var blob = new Blob(data, {type: "octet/stream"}),
url = window.URL.createObjectURL(blob);
a.href = url;
a.download = name;
a.click();
window.URL.revokeObjectURL(url);
};
}());
saveByteArray([sampleBytes], 'example.txt');
JSFiddle: http://jsfiddle.net/VB59f/2
Use FileSaver.js. It supports Chrome, Edge, Firefox, and IE 10+ (and probably IE < 10 with a few "polyfills" - see Note 4). FileSaver.js implements the saveAs() FileSaver interface in browsers that do not natively support it:
     https://github.com/eligrey/FileSaver.js
Minified version is really small at < 2.5KB, gzipped < 1.2KB.
Usage:
/* TODO: replace the blob content with your byte[] */
var blob = new Blob([yourBinaryDataAsAnArrayOrAsAString], {type: "application/octet-stream"});
var fileName = "myFileName.myExtension";
saveAs(blob, fileName);
You might need Blob.js in some browsers (see Note 3). Blob.js implements the W3C Blob interface in browsers that do not natively support it. It is a cross-browser implementation:
     https://github.com/eligrey/Blob.js
Consider StreamSaver.js if you have files larger than blob's size limitations.
Complete example:
/* Two options
* 1. Get FileSaver.js from here
* https://github.com/eligrey/FileSaver.js/blob/master/FileSaver.min.js -->
* <script src="FileSaver.min.js" />
*
* Or
*
* 2. If you want to support only modern browsers like Chrome, Edge, Firefox, etc.,
* then a simple implementation of saveAs function can be:
*/
function saveAs(blob, fileName) {
var url = window.URL.createObjectURL(blob);
var anchorElem = document.createElement("a");
anchorElem.style = "display: none";
anchorElem.href = url;
anchorElem.download = fileName;
document.body.appendChild(anchorElem);
anchorElem.click();
document.body.removeChild(anchorElem);
// On Edge, revokeObjectURL should be called only after
// a.click() has completed, atleast on EdgeHTML 15.15048
setTimeout(function() {
window.URL.revokeObjectURL(url);
}, 1000);
}
(function() {
// convert base64 string to byte array
var byteCharacters = atob("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");
var byteNumbers = new Array(byteCharacters.length);
for (var i = 0; i < byteCharacters.length; i++) {
byteNumbers[i] = byteCharacters.charCodeAt(i);
}
var byteArray = new Uint8Array(byteNumbers);
// now that we have the byte array, construct the blob from it
var blob1 = new Blob([byteArray], {type: "application/octet-stream"});
var fileName1 = "cool.gif";
saveAs(blob1, fileName1);
// saving text file
var blob2 = new Blob(["cool"], {type: "text/plain"});
var fileName2 = "cool.txt";
saveAs(blob2, fileName2);
})();
JSFiddle here: should download two small files when the page loads - a binary file (GIF) and a text file. Update: StackOverflow's Run code snippet doesn't support downloading files anymore as sandboxes by default don't allow downloading files in newer browser versions.)
Tested on Chrome, Edge, Firefox, and IE 11 (use FileSaver.js for supporting IE 11).You can also save from a canvas element. See https://github.com/eligrey/FileSaver.js#saving-a-canvas.
Demos: https://eligrey.com/demos/FileSaver.js/
Blog post by author of FileSaver.js: http://eligrey.com/blog/post/saving-generated-files-on-the-client-side
Note 1: Browser support: https://github.com/eligrey/FileSaver.js#supported-browsers
Note 2: Failed to execute 'atob' on 'Window'
Note 3: Polyfill for browsers not supporting Blob: https://github.com/eligrey/Blob.js                See http://caniuse.com/#search=blob
Note 4: IE < 10 support (I've not tested this part):                https://github.com/eligrey/FileSaver.js#ie--10
                https://github.com/eligrey/FileSaver.js/issues/56#issuecomment-30917476
Downloadify is a Flash-based polyfill for supporting IE6-9: https://github.com/dcneiner/downloadify (I don't recommend Flash-based solutions in general, though.)
Demo using Downloadify and FileSaver.js for supporting IE6-9 also: http://sheetjs.com/demos/table.html
Note 5: Creating a BLOB from a Base64 string in JavaScript
Note 6: FileSaver.js examples: https://github.com/eligrey/FileSaver.js#examples
Try
let bytes = [65,108,105,99,101,39,115,32,65,100,118,101,110,116,117,114,101];
let base64data = btoa(String.fromCharCode.apply(null, bytes));
let a = document.createElement('a');
a.href = 'data:;base64,' + base64data;
a.download = 'binFile.txt';
a.click();
I convert here binary data to base64 (for bigger data conversion use this) - during downloading browser decode it automatically and save raw data in file. 2020.06.14 I upgrade Chrome to 83.0 and above SO snippet stop working (probably due to sandbox security restrictions) - but JSFiddle version works - here
To do this task download.js library can be used. Here is an example from library docs:
download("data:image/gif;base64,R0lGODlhRgAVAIcAAOfn5+/v7/f39////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////yH5BAAAAP8ALAAAAABGABUAAAj/AAEIHAgggMGDCAkSRMgwgEKBDRM+LBjRoEKDAjJq1GhxIMaNGzt6DAAypMORJTmeLKhxgMuXKiGSzPgSZsaVMwXUdBmTYsudKjHuBCoAIc2hMBnqRMqz6MGjTJ0KZcrz5EyqA276xJrVKlSkWqdGLQpxKVWyW8+iJcl1LVu1XttafTs2Lla3ZqNavAo37dm9X4eGFQtWKt+6T+8aDkxUqWKjeQUvfvw0MtHJcCtTJiwZsmLMiD9uplvY82jLNW9qzsy58WrWpDu/Lp0YNmPXrVMvRm3T6GneSX3bBt5VeOjDemfLFv1XOW7kncvKdZi7t/S7e2M3LkscLcvH3LF7HwSuVeZtjuPPe2d+GefPrD1RpnS6MGdJkebn4/+oMSAAOw==", "dlDataUrlBin.gif", "image/gif");

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