I have recently started using Bootstrap Table and the export plugin for it. A problem I came across is that the export plugin doesn't work for IE, because the files are output using Data URI, which IE doesn't support (I think I read that IE 11 supports it, but no one in my organization uses IE 11, of course.).
The only file types I am interested in exporting are Microsoft office types (Word, Excel) and PDFs.
I have created a functioning workaround for the MS files.
if (supportsDataUriNavigation())
window.open('data:application/vnd.ms-' + defaults.type + ';filename=exportData.doc;' + base64data);
else {
var iframe = document.getElementById("dataFrame");
iframe = iframe.contentWindow || iframe.contentDocument;
iframe.document.open("text/html", "replace");
iframe.document.write(excelFile);
iframe.document.close();
iframe.focus();
iframe.document.execCommand("SaveAs", true, defaults.fileName + fileExtension);
}
In this check, if the browser is IE, then I use the code I found here. This works great for the MS file types, but when I try to do the same for the PDF file, it tries to save as a .htm file. This file is blank. If I replace the fileExtension variable with .pdf in my code, the SaveAs window will not display when I click to export. There are no javascript errors.
I set the src attribute of an embed tag to a string that is returned by the plugin javascript, and it looks like so: 'application/pdf;base64,' + Base64.encode(buffer)
Anyone know of any solution/workaround?
I know this is very old question, but I found the solution and I want to share anyone who has the same problem. You can see the demo here :
https://jsfiddle.net/quangminh_ln/hy36tnt6/
'use strict';
var data = "...Your PDF base64 string...";
var fileName = "your_file_name";
if (window.navigator && window.navigator.msSaveOrOpenBlob) { // IE workaround
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: 'application/pdf'});
window.navigator.msSaveOrOpenBlob(blob, fileName);
}
else { // much easier if not IE
window.open("data:application/pdf;base64, " + data, '', "height=600,width=800");
}
The link that I saw for my solution : https://viethoblog.wordpress.com/2016/08/30/loaddisplay-pdf-from-base64-string-bonus-ie-workaround/
Related
Hi I'm trying to move the bytes of my video which is in c# to javascript to make the bytes into URL.createObjectURL on Blazor server-side
I moved the bytes using Js Invoke
.cs
if (!string.IsNullOrEmpty(item.PathFile))
{
//Byte Video
byte[] result = GetFile(item.PathFile);
if (result != null)
{
var url = await Js.InvokeAsync<string>("videoUrl", result);
data.ImageString = url;
}
}
.js
function videoUrl(value) {
var byteCharacters = atob(value);
var byteNumbers = new Array(byteCharacters.length);
for (var i = 0; i < byteCharacters.length; i++) {
byteNumbers[i] = byteCharacters.charCodeAt(i);
}
var byteArray = new Uint8Array(byteNumbers);
//Byte Array -> Blob
var file = new Blob([byteArray], { type: 'data:video/mp4;base64' });
//Blob -> Object URL
var fileURL = URL.createObjectURL(file);
return fileURL;
}
My problem is, I tried this script for a video with a size of 3 Mb it runs fine, but when I try for a 133Mb video I get an error:
Error: System.ArgumentException: The JSON value of length 139569235 is too large and not supported.
I've tried to fix it, but it still fails, it makes me a little frustrated
So is there a solution for my error ? or what should I do?
I thank you for any suggestions or feedback
So, reading on the AspNetDocs github, there is a startup option that can change the max message size, but I think it only applies to calls from JS to .Net (https://github.com/dotnet/AspNetCore.Docs/issues/21208). Worth a check though.
services.AddServerSideBlazor()
.AddHubOptions(options => options.MaximumReceiveMessageSize = 32000);
Personally though, I would do as Mister Magoo said in the comment and either use an API or chunk the data and reassemble at the other end.
I have a blob created with a base64, and I need to make this data downloadable as a pdf.
I created this snippet:
var blob = new Blob([byte]);
var link = document.createElement('a');
link.href = window.URL.createObjectURL(blob);
link.target = '_blank';
var fileName = name + '.pdf';
link.download = fileName;
link.click();
It works on all the browsers, except safari mobile on iOS.
The file gets actually downloaded, but its name is "unknown", then it can't be open since the extension gets lost.
The problem is that the download attribute lacks support on this browser and IE.
There are a lot of workarounds for IE, but I didn't find any for Safari/iOS.
Do you know how can I download a blob got from a base64 (no XHR involved) in this browser?
Thank you
I need to make this data downloadable as a pdf (...) in safari iOS
SHORT ANSWER: you can't. Due this bug is impossible to download the file on safari iOS
The alternative is to open the file on the browser with the proper mime type, so it can show its content (and the user can then manually download it if needed).
Make sure to pass mime type when creating the Blob. reference
var blob = new Blob([byte], {type: 'application/pdf'});
Lastly, I'd strongly suggest you to use FileSaver.js which that can handle most of the corner cases/multiple browser support for save (or in this case, open) a file in javascript.
As per the below link:-
https://caniuse.com/#feat=download
Safari 13 Beta 3 is released so you can check on the same, whether its working or not?
You can download a blob got from a base64 by using a atob function.
The atob function will decode a base64-encoded string into a new string with a character for each byte of the binary data.
You can save blob locally via FileSaver.js .
You can also check here that would be helpful:-
How to open Blob URL on Chrome iOS
This is something I have tried in my project and it is working for me.
import "./styles.css";
var pdfData =
"JVBERi0xLjcKCjEgMCBvYmogICUgZW50cnkgcG9pbnQKPDwKICAvVHlwZSAvQ2F0YWxvZwog" +
"IC9QYWdlcyAyIDAgUgo+PgplbmRvYmoKCjIgMCBvYmoKPDwKICAvVHlwZSAvUGFnZXMKICAv" +
"TWVkaWFCb3ggWyAwIDAgMjAwIDIwMCBdCiAgL0NvdW50IDEKICAvS2lkcyBbIDMgMCBSIF0K" +
"Pj4KZW5kb2JqCgozIDAgb2JqCjw8CiAgL1R5cGUgL1BhZ2UKICAvUGFyZW50IDIgMCBSCiAg" +
"L1Jlc291cmNlcyA8PAogICAgL0ZvbnQgPDwKICAgICAgL0YxIDQgMCBSIAogICAgPj4KICA+" +
"PgogIC9Db250ZW50cyA1IDAgUgo+PgplbmRvYmoKCjQgMCBvYmoKPDwKICAvVHlwZSAvRm9u" +
"dAogIC9TdWJ0eXBlIC9UeXBlMQogIC9CYXNlRm9udCAvVGltZXMtUm9tYW4KPj4KZW5kb2Jq" +
"Cgo1IDAgb2JqICAlIHBhZ2UgY29udGVudAo8PAogIC9MZW5ndGggNDQKPj4Kc3RyZWFtCkJU" +
"CjcwIDUwIFRECi9GMSAxMiBUZgooSGVsbG8sIHdvcmxkISkgVGoKRVQKZW5kc3RyZWFtCmVu" +
"ZG9iagoKeHJlZgowIDYKMDAwMDAwMDAwMCA2NTUzNSBmIAowMDAwMDAwMDEwIDAwMDAwIG4g" +
"CjAwMDAwMDAwNzkgMDAwMDAgbiAKMDAwMDAwMDE3MyAwMDAwMCBuIAowMDAwMDAwMzAxIDAw" +
"MDAwIG4gCjAwMDAwMDAzODAgMDAwMDAgbiAKdHJhaWxlcgo8PAogIC9TaXplIDYKICAvUm9v" +
"dCAxIDAgUgo+PgpzdGFydHhyZWYKNDkyCiUlRU9G";
let download = () => {
if (pdfData) {
var iOS = /iPad|iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;
var isChrome =
navigator.userAgent.toLowerCase().indexOf("CriOS") > -1 ||
navigator.vendor.toLowerCase().indexOf("google") > -1;
var iOSVersion = [];
if (iOS) {
iOSVersion = navigator.userAgent
.match(/OS [\d_]+/i)[0]
.substr(3)
.split("_")
.map((n) => parseInt(n));
}
var attachmentData = pdfData;
var attachmentName = "Test.pdf";
var contentType = "application/pdf";
var binary = atob(attachmentData.replace(/\s/g, ""));
var len = binary.length;
var buffer = new ArrayBuffer(len);
var view = new Uint8Array(buffer);
for (var i = 0; i < len; i++) {
view[i] = binary.charCodeAt(i);
}
var linkElement = document.createElement("a");
try {
var hrefUrl = "";
var blob = "";
if (iOS && !isChrome && iOSVersion[0] <= 12) {
blob = "data:application/pdf;base64," + pdfData;
hrefUrl = blob;
} else {
if (iOS && !isChrome) {
contentType = "application/octet-stream";
}
blob = new Blob([view], { type: contentType });
hrefUrl = window.URL.createObjectURL(blob);
}
linkElement.setAttribute("href", hrefUrl);
linkElement.setAttribute("target", "_blank");
if ((iOS && (iOSVersion[0] > 12 || isChrome)) || !iOS) {
linkElement.setAttribute("download", attachmentName);
}
var clickEvent = new MouseEvent("click", {
view: window,
bubbles: true,
cancelable: false
});
linkElement.dispatchEvent(clickEvent);
} catch (ex) {}
}
};
export default function App() {
return (
<div className="App">
<h1>Hello CodeSandbox</h1>
<button onClick={download}>Download</button>
</div>
);
}
The "target" attribute in Safari seems to override the "download" attribute. Currently, as to my knowledge, there is no way to solve this. So I think you have to wait for the next Safari version (13) which will be out in a few months.
In new chrome versions I got this error:
Window is not allowed to navigate Top-frame navigations to data URLs
The image looks like that (contains data in the url):
data:image/png;base64,/9j/4AAQSkZJRgABAQAASABIAAD/4QBYRXhpZgAA...
I really need to open it in a new tab. The iFrame solution isn't relevant
A javascript solution:
var newTab = window.open();
newTab.document.body.innerHTML = '<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==" width="100px" height="100px">';
There's a lot of ways that you can change the way window.open() behaves, check out the documentation. It also shouldn't be hard to create some css/html that will mimic the way Chrome displays images in new tabs. The ability to load data: URLs was removed for security reasons, so you're out of luck if you're looking for a way to do that.
You can use this function to open any base 64 data URI in a new tab:
function openBase64InNewTab (data, mimeType) {
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 file = new Blob([byteArray], { type: mimeType + ';base64' });
var fileURL = URL.createObjectURL(file);
window.open(fileURL);
}
In your case with the image, you'd use it like this:
openBase64InNewTab('YOUR_BASE64_DATA', 'image/png');
url adress bar is limited for chars. You can only show "data:image/png;base64,.." string on page Or..
save it with a tag with attribute like download="iLiveCats.jpg"
Your code will be like this: download id
I have a very strange problem with chrome browser. I try to open files (images and PDFs) in the new popup. For do that I use this function
window.open('data:' + type + ';base64,' + data, '_blank', 'height=300,width=400');
where type and data I get from the server.
So it's work perfectly in Opera, Mozilla, and Edge.
Popup in opera
But in Chrome I get an empty popup window.
Popup in chrome
May be someone knows how can I fix this, or is this chrome bug?
Using instead of this
window.open('data:' + type + ';base64,' + data, '_blank', 'height=300,width=400');
this code
let byteCharacters = atob(file);
let byteNumbers = new Array(byteCharacters.length);
for (let i = 0; i < byteCharacters.length; i++) {
byteNumbers[i] = byteCharacters.charCodeAt(i);
}
let byteArray = new Uint8Array(byteNumbers);
let blob = new Blob([byteArray], {type: contentType});
const fileURL = URL.createObjectURL(blob);
window.open(fileURL, '_blank', 'height=300,width=400');
resolve the problem.
The reason might be Hardware acceleration of chrome.
Try following Douglas answer to disable it, here.
Before somebody says, "duplicate", I just want to make sure, that folks know, that I have already reviewed these questions:
1) Uses angular and php, not sure what is happening here (I don't know PHP): Download zip file and trigger "save file" dialog from angular method
2) Can't get this answer to do anything: how to download a zip file using angular
3) This person can already download, which is past the point I'm trying to figure out:
Download external zip file from angular triggered on a button action
4) No answer for this one:
download .zip file from server in nodejs
5) I don't know what language this even is:
https://stackoverflow.com/questions/35596764/zip-file-download-using-angularjs-directive
Given those questions, if this is still a duplicate, I apologize. Here is, yet, another version of this question.
My angular 1.5.X client gives me a list of titles, of which each have an associated file. My Node 4.X/Express 4.X server takes that list, gets the file locations, creates a zip file, using express-zip from npm, and then streams that file back in the response. I then want my client to initiate the browser's "download a file" option.
Here's my client code (Angular 1.5.X):
function bulkdownload(titles){
titles = titles || [];
if ( titles.length > 0 ) {
$http.get('/query/bulkdownload',{
params:{titles:titles},
responseType:'arraybuffer'
})
.then(successCb,errorCb)
.catch(exceptionCb);
}
function successCb(response){
// This is the part I believe I cannot get to work, my code snippet is below
};
function errorCb(error){
alert('Error: ' + JSON.stringify(error));
};
function exceptionCb(ex){
alert('Exception: ' + JSON.stringify(ex));
};
};
Node (4.X) code with express-zip, https://www.npmjs.com/package/express-zip:
router.get('/bulkdownload',function(req,resp){
var titles = req.query.titles || [];
if ( titles.length > 0 ){
utils.getFileLocations(titles).
then(function(files){
let filename = 'zipfile.zip';
// .zip sets Content-Type and Content-disposition
resp.zip(files,filename,console.log);
},
_errorCb)
}
});
Here's my successCb in my client code (Angular 1.5.X):
function successCb(response){
var URL = $window.URL || $window.webkitURL || $window.mozURL || $window.msURL;
if ( URL ) {
var blob = new Blob([response.data],{type:'application/zip'});
var url = URL.createObjectURL(blob);
$window.open(url);
}
};
The "blob" part seems to work fine. Checking it in IE's debugger, it does look like a file stream of octet information. Now, I believe I need to get that blob into the some HTML5 directive, to initiate the "Save File As" from the browser. Maybe? Maybe not?
Since 90%+ of our users are using IE11, I test all of my angular in PhantomJS (Karma) and IE. When I run the code, I get the old "Access is denied" error in an alert window:
Exception: {"description":"Access is denied...<stack trace>}
Suggestions, clarifications, answers, etc. are welcome!
Use this one:
var url="YOUR ZIP URL HERE";
window.open(url, '_blank');
var zip_file_path = "" //put inside "" your path with file.zip
var zip_file_name = "" //put inside "" file name or something
var a = document.createElement("a");
document.body.appendChild(a);
a.style = "display: none";
a.href = zip_file_path;
a.download = zip_file_name;
a.click();
document.body.removeChild(a);
As indicated in this answer, I have used the below Javascript function and now I am able to download the byte[] array content successfully.
Function to convert byte array stream (type of string) to blob object:
var b64toBlob = function(b64Data, contentType, sliceSize) {
contentType = contentType || '';
sliceSize = sliceSize || 512;
var byteCharacters = atob(b64Data);
var byteArrays = [];
for (var offset = 0; offset < byteCharacters.length; offset += sliceSize) {
var slice = byteCharacters.slice(offset, offset + sliceSize);
var byteNumbers = new Array(slice.length);
for (var i = 0; i < slice.length; i++) {
byteNumbers[i] = slice.charCodeAt(i);
}
var byteArray = new Uint8Array(byteNumbers);
byteArrays.push(byteArray);
}
var blob = new Blob(byteArrays, {type: contentType});
return blob;
};
An this is how I call this function and save the blob object with FileSaver.js (getting data via Angular.js $http.get):
$http.get("your/api/uri").success(function(data, status, headers, config) {
//Here, data is type of string
var blob = b64toBlob(data, 'application/zip');
var fileName = "download.zip";
saveAs(blob, fileName);
});
Note: I am sending the byte[] array (Java-Server-Side) like this:
byte[] myByteArray = /*generate your zip file and convert into byte array*/ new byte[]();
return new ResponseEntity<byte[]>(myByteArray , headers, HttpStatus.OK);
I updated my bulkdownload method to use $window.open(...) instead of $http.get(...):
function bulkdownload(titles){
titles = titles || [];
if ( titles.length > 0 ) {
var url = '/query/bulkdownload?';
var len = titles.length;
for ( var ii = 0; ii < len; ii++ ) {
url = url + 'titles=' + titles[ii];
if ( ii < len-1 ) {
url = url + '&';
}
}
$window.open(url);
}
};
I have only tested this in IE11.