I'm using a hidden iframe in an HTML page for downloading purposes. And I would like to know when it's done. I've searched the Internet a lot and everyone says that I should use iframe's onload event handler but it's not working for me in Chrome!
I'm not sure where but I read somewhere that it's because I'm downloading files with my iframe instead of HTML documents. And I must admit that it's specific to Chrome and it works fine in FireFox.
I've also tested readstate and onreadystatechange without success.
I've created a fiddle to demonstrate the problem:
function download(url)
{
var iframe = document.createElement("iframe");
iframe.src = url;
iframe.onload = function () {
console.log('Download completed.');
};
document.body.appendChild(iframe);
}
<button onclick="download('http://www.colorado.edu/conflict/peace/download/peace.zip');">Download</button>
function downloadURL(url) {
var hiddenIFrameID = 'hiddenDownloader',
iframe = document.getElementById(hiddenIFrameID);
if (iframe === null) {
iframe = document.createElement('iframe');
iframe.id = hiddenIFrameID;
iframe.style.display = 'none';
iframe.onload = function () {
alert('Download completed.');
};
document.body.appendChild(iframe);
}
iframe.src = url;
}
<button onclick="downloadURL('http://www.colorado.edu/conflict/peace/download/peace.zip');">Download</button>
Related
I'm trying to make an app that allows you a text editor. You can type anything in to a text block. You can do two things with said text block:
a) run the text as an html page in a new about:blank tab or
b) save the text as a .html
For some reason, though, when I tried to implement the save ability, neither function would load. If I go into the JS console, it shows me this error upon clicking on the save button:
"Uncaught ReferenceError: saveAsFile is not defined (temp.html,1)"
When I seperated them into two <script> blocks, I could get the save function to work. However, when I did that, the Run in New Tab function no longer worked. It was utterly confusing.
I have used multiple functions before, and I don't know why it's suddenly not working. Can someone help? This is my code:
<script>
function run() {
var codeTab = window.open("" _blank);
var codeRun = document.getElementById("code").value;
codeTab.document.write(codeRun);
}
</script>
<script>
/*i stole-i mean used-this code from someone else*/
function saveAsFile() {
var textToSave = document.getElementById("code").value;
var hiddenElement = document.createElement('a');
hiddenElement.href = 'data:attachment/text,' + encodeURI(textToSave);
hiddenElement.target = '_blank';
hiddenElement.download = 'save.html';
hiddenElement.click();
}
</script>
On line 3, you have window.open("" _blank);. It should be window.open("_blank");.
I also cannot see anywhere saveAs() is being called (or defined). Is it possibly being called in codeRun? See below code which worked for me.
<textarea id="code">
</textarea>
<button onclick="run();">Run</button>
<button onclick="saveAsFile();">Save</button>
<script>
function run() {
var codeTab = window.open("_blank");
var codeRun = document.getElementById("code").value;
codeTab.document.write(codeRun);
}
/*i stole-i mean used-this code from someone else*/
function saveAsFile() {
var textToSave = document.getElementById("code").value;
var hiddenElement = document.createElement('a');
hiddenElement.href = 'data:attachment/text,' + encodeURI(textToSave);
hiddenElement.target = '_blank';
hiddenElement.download = 'save.html';
hiddenElement.click();
}
</script>
After updating Google Chrome, the report jsPDF in a new Window does not work any more.
The console shows the message:
Not allowed to navigate top frame to data URL:
data:application/pdf;base64,JVBERi0xLjMKMyAwIG9iago8PC9UeXBlIC9QYWdlCi9QYXJlbnQgMSAwIFIKL1....
Can you help-me?
Thanks.
This works well now that chrome has removed top frame navigation. Only downloading the pdf in chrome gives problem. Download works in well in firefox tho.
var string = doc.output('datauristring');
var iframe = "<iframe width='100%' height='100%' src='" + string + "'></iframe>"
var x = window.open();
x.document.open();
x.document.write(iframe);
x.document.close();
Apparently Google Chrome has removed support for top-frame navigation, you can see more informations here: https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/GbVcuwg_QjM
You may try to render the jsPDF to an iFrame
I recently had the same problem using FileReader object to read content and show my JSReport.
var reader = new FileReader();
reader.onload = function (e) {
window.open(reader.result, "_blank");
}
reader.readAsDataURL(blob);
Unfortunatly after chrome update all my report stopped working.
I tried to fix this by using Blob object and it's still working but if you have a popup blocker it will not work.
var file = new Blob([blob], { type: 'application/pdf' });
var fileURL = URL.createObjectURL(file);
window.open(fileURL);
I finally find a way to avoid this problem by creating the iFrame dynamically after reading this topic and i decided to share the solution.
var file = new Blob([blob], { type: 'application/pdf' });
var fileURL = URL.createObjectURL(file);
var win = window.open();
win.document.write('<iframe src="' + fileURL + '" frameborder="0" style="border:0; top:0px; left:0px; bottom:0px; right:0px; width:100%; height:100%;" allowfullscreen></iframe>')
Maybe can help, create a function to export with the download attribute html5:
var docPdf = doc.output();
exportToFile(docPdf,defaults.type);
function exportToFile(data,type){
var hiddenElement = document.createElement('a');
hiddenElement.href = 'data:text/'+type+';filename='+'exportar.'+type+';'+'charset=utf-8,' + encodeURI(data);
hiddenElement.target = '_blank';
hiddenElement.download = 'exportar.'+type;
hiddenElement.click();
}
the download property of the a element has to contain a file name.
function window_download( datauri )
{
const match = datauri.match(/(filename=)([^;]+)/);
const fileName = match ? match[2] : '' ;
if ( fileName )
{
const downloadLink = document.createElement("a");
downloadLink.download = fileName;
downloadLink.innerHTML = "Download File";
downloadLink.href = datauri ;
downloadLink.click();
}
else
{
throw 'missing download file name' ;
}
// get contents of pdf from jsPDF as a data uri.
const uri = pdf.output('datauristring', 'packing-list.pdf' );
window_download( uri ) ;
<iframe id="ManualFrame"
frameborder="0"
style="border:0"
allowfullscreen>
</iframe>
<script>
$(function () {
setManualFrame();
});
function setManualFrame() {
$("#ManualFrame").attr("height", screen.height);
$("#ManualFrame").attr("width", screen.width);
$("#ManualFrame").attr("src", "data:application/pdf;base64," + Your_PDF_Data);
}
</script>
var pdfUrl = doc.output('datauri').substring(doc.output('datauri').indexOf(',')+1);
var binary = atob(pdfUrl.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 blob = new Blob( [view], { type: "application/pdf" });
var url = URL.createObjectURL(blob);
function openPDF(){
window.open(url);
}
As chrome removed its support for - Top-frame navigation. Luckily jsPDF has an API - "save()", which offers the same functionality as doc.output('datauri')
Below is the example implementation of save()
var doc = new jsPDF();
doc.addImage(imgData, 'JPEG', 0, 0, 300, 160);
doc.save('fileName.pdf');
save(filename, options) → {jsPDF|Promise}
Saves as PDF document. An alias of jsPDF.output('save', 'filename.pdf'). Uses FileSaver.js-method saveAs.
Refer JSPDF documentation for more information -
Add attrbute download
Based on Joyston's answer, but without reparsing and therefore without additional need to escape something:
x=window.open();
iframe=x.document.createElement('iframe')
iframe.width='100%'
iframe.height='100%'
iframe.frameBorder=0
iframe.style="border: 0"
iframe.src='data:text/html........' //data-uri content here
x.document.body.appendChild(iframe);
Not related to jspdf, but did help me here (and this question is the top hit at google): If specifying a download="..." attribute to the anchor tag, the download prompt will properly open up.
#kuldeep-choudhary
Hi, in fact, to solve i'm using object tag with angularJS 1.5.xx
<object ng-attr-data="{{data}}" type="application/pdf"></object>
and in script:
$scope.doc.data = $sce.trustAsResourceUrl(doc.output("datauristring"));
In pure javascript, maybe like this works:
html:
<object id="obj" type="application/pdf" ></object>
js:
document.elementById('obj').data = doc.output("datauristring");
please, try and correct-me if I wrong.
Using download="" made me able to download the file
/**
* Creates an anchor element `<a></a>` with
* the base64 pdf source and a filename with the
* HTML5 `download` attribute then clicks on it.
* #param {string} pdf
* #return {void}
*/
function downloadPDF(pdf) {
const linkSource = `data:application/pdf;base64,${pdf}`;
const downloadLink = document.createElement("a");
const fileName = "vct_illustration.pdf";
downloadLink.href = linkSource;
downloadLink.download = fileName;
downloadLink.click();
}
Source from: https://medium.com/octopus-labs-london/downloading-a-base-64-pdf-from-an-api-request-in-javascript-6b4c603515eb
In angular2+ -
app.component.html -
<object id="obj" [attr.data] type="application/pdf"> </object>
app.component.ts
document.getElementById('obj').dataset.data = doc.output("datauristring");
var blob = doc.output("blob");
window.open(URL.createObjectURL(blob));
In my app I have tag with link to api for file download (pdf). The problem is that it is not 100% stable and I have to handle then service is not available or file is not available and server responds with error.
<a href="link/to/api" target="_blank" download="filename">
By the way I am using AngularJS in this app. If there is any solution using it it would help a lot
In case somebody else will face similar problem. Here is the solution I have implemented after some research.
Remove the link from an <a> tag and add a click event:
<a href="#" ng-click="downloadFile()">
now you need to download blob (here you can control if you can access it file) and let make DOM object add all needed attributes end trigger it.
$scope.downloadFile = function () {
$http.get('api/link', { responseType: 'arraybuffer' })
.then(function (data) {
var file = new Blob([data], { type: "application/pdf" });
var url = $window.URL || $window.webkitURL;
var fileURL = url.createObjectURL(file);
var a = document.createElement("a");
a.href = fileURL;
a.download = "nameOfFile";
a.target = "_self";
a.click();
url.revokeObjectURL(fileURL);
}).error(function (data) {
console.error(data);
})
};
UPDATE:
This was working only for Chrome. Other browsers had different approach of downloading blob. So I have users FileSaver.js for this task. Even then I had problems opening it on iOS. It is blocking file saving if it was triggered out side of user event. Here is my workaround for this.
var file = new Blob([data], { type: "application/pdf" });
var isIos = (navigator.userAgent.match(/(iPad|iPhone|iPod)/g) ? true : false);
if(isIos){
var element = document.getElementById("downloadButton");
element.onclick - function(){
saveAs(file, "name.pdf");
}
element.onclick();
} else {
saveAs(file, "name.pdf");
}
Hope this will save time for someone.
Use extensionnames after the link like link/to/api.pdf and download="filename.pdf".
Also, try target="_self"
From the following code I'm creating a dynamic anchor tag which downloads a file. This code works well in Chrome but not in IE. How can I get this working
<div id="divContainer">
<h3>Sample title</h3>
</div>
<button onclick="clicker()">Click me</button>
<script type="text/javascript">
function clicker() {
var anchorTag = document.createElement('a');
anchorTag.href = "http://cdn1.dailymirror.lk/media/images/finance.jpg";
anchorTag.download = "download";
anchorTag.click();
var element = document.getElementById('divContainer');
element.appendChild(anchorTag);
}
</script>
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.
In my case, since there's a requirement to support the usage of IE 11 (version 11.0.9600.18665), I ended up using the solution provided by #Henners on his comment:
// IE10+ : (has Blob, but not a[download] or URL)
if (navigator.msSaveBlob) {
return navigator.msSaveBlob(blob, fileName);
}
It's quite simple and practical.
Apparently, this solution was found on the Javascript download function created by dandavis.
Old question, but thought I'd add our solution. Here is the code I used on my last project. It's not perfect, but it passed QA in all browsers and IE9+.
downloadCSV(data,fileName){
var blob = new Blob([data], {type: "text/plain;charset=utf-8;"});
var anchor = angular.element('<a/>');
if (window.navigator.msSaveBlob) { // IE
window.navigator.msSaveOrOpenBlob(blob, fileName)
} else if (navigator.userAgent.search("Firefox") !== -1) { // Firefox
anchor.css({display: 'none'});
angular.element(document.body).append(anchor);
anchor.attr({
href: 'data:attachment/csv;charset=utf-8,' + encodeURIComponent(data),
target: '_blank',
download: fileName
})[0].click();
anchor.remove();
} else { // Chrome
anchor.attr({
href: URL.createObjectURL(blob),
target: '_blank',
download: fileName
})[0].click();
}
}
Using the ms specific API worked best for us in IE. Also note that some browsers require the anchor to actually be in the DOM for the download attribute to work, whereas Chrome, for example, does not. Also, we found some inconsistencies with how Blobs work in various browsers. Some browsers also have an export limit. This allows the largest possible CSV export in each browser afaik.
As of build 10547+, the Microsoft Edge browser is now supporting the download attribute on a tags.
Download Image
Edge features update: https://dev.windows.com/en-us/microsoft-edge/platform/changelog/desktop/10547/
a[download] standard: http://www.w3.org/html/wg/drafts/html/master/links.html#attr-hyperlink-download
This code fragment allows saving blob in the file in IE, Edge and other modern browsers.
var request = new XMLHttpRequest();
request.onreadystatechange = function() {
if (request.readyState === 4 && request.status === 200) {
// Extract filename form response using regex
var filename = "";
var disposition = request.getResponseHeader('Content-Disposition');
if (disposition && disposition.indexOf('attachment') !== -1) {
var filenameRegex = /filename[^;=\n]*=((['"]).*?\2|[^;\n]*)/;
var matches = filenameRegex.exec(disposition);
if (matches != null && matches[1]) filename = matches[1].replace(/['"]/g, '');
}
if (window.navigator.msSaveOrOpenBlob) { // for IE and Edge
window.navigator.msSaveBlob(request.response, filename);
} else {
// for modern browsers
var a = document.createElement('a');
a.href = window.URL.createObjectURL(request.response);
a.download = filename;
a.style.display = 'none';
document.body.appendChild(a);
a.click();
}
}
button.disabled = false;
dragArea.removeAttribute('spinner-visible');
// spinner.style.display = "none";
};
request.open("POST", "download");
request.responseType = 'blob';
request.send(formData);
For IE and Edge use: msSaveBlob
Use my function
It bind your atag to download file in IE
function MS_bindDownload(el) {
if(el === undefined){
throw Error('I need element parameter.');
}
if(el.href === ''){
throw Error('The element has no href value.');
}
var filename = el.getAttribute('download');
if (filename === null || filename === ''){
var tmp = el.href.split('/');
filename = tmp[tmp.length-1];
}
el.addEventListener('click', function (evt) {
evt.preventDefault();
var xhr = new XMLHttpRequest();
xhr.onloadstart = function () {
xhr.responseType = 'blob';
};
xhr.onload = function () {
navigator.msSaveOrOpenBlob(xhr.response, filename);
};
xhr.open("GET", el.href, true);
xhr.send();
})
}
Append child first and then click
Or you can use window.location= 'url' ;
As mentioned in earlier answer , download attribute is not supported in IE . As a work around, you can use iFrames to download the file . Here is a sample code snippet.
function downloadFile(url){
var oIframe = window.document.createElement('iframe');
var $body = jQuery(document.body);
var $oIframe = jQuery(oIframe).attr({
src: url,
style: 'display:none'
});
$body.append($oIframe);
}
I copied the code from here and updated it for ES6 and ESLint and added it to my project.
You can save the code to download.js and use it in your project like this:
import Download from './download'
Download('/somefile.png', 'somefile.png')
Note that it supports dataURLs (from canvas objects), and more... see https://github.com/rndme for details.
I have problems using an OnLoad event in a function:
(function () {
var ds = document.createElement('script');
ds.type = 'text/javascript';
ds.async = true;
ds.src = 'http://' + ds_shortname + '.myscript.com/emb.js';
(document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(ds);
ds.onLoad = function(){
alert('ok');
var ds_div = $('ds-div');
if (IsConnected())
{
alert('connect');
}else{
alert('not connect');
}
}
})();
In fact my ds.onLoad doesn't execute and I don't know why. I think it because my function execute herselve but I have no isea how to solve that.
Thanks a lot.
Use the Utilities/Asset classes from More for this, for example like this:
new Asset.javascript('//connect.facebook.net/en_US/all.js', {
onLoad:function(){
$('message').set('text', 'Facebook loaded!');
},
async: true
});
Working sample: http://jsfiddle.net/FU5rk/
Directly related to your problem: you inject the element into the DOM before applying the onLoad event. I'm pretty sure that if the file is in cache, or a really fast download, it's simply loaded before you set the event handler.