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Code Issues Packages Projects Releases Wiki Activity

Notify Users for the failure in loading Image via external URL (#1813)

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* Load image via URL

* notify users for image load failue due to CORS error

* added a check for notifybox

* added some more checks

* added bootstrap version v4 classes

Co-authored-by: Jeffrey Warren <jeff@unterbahn.com>
This commit is contained in:
Vivek Singh
2021-02-20 00:59:43 +05:30
committed by GitHub
parent e08b706497
commit 3b857796af
3 changed files with 84 additions and 14 deletions
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64
src/ui/LoadImage.js
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@@ -7,6 +7,22 @@ function LoadImage(ref, name, src, main_callback) {
};
return image;
}
// function to check whether a image can be fetched from external source or not
function checkForError(image_url) {
return fetch(image_url).then(function(res) {
if(res)
return false;
else
return true;
}).catch(function(err) {
if(err)
console.log('Error occured because of image URL ',err);
return true;
});
}
function CImage(src, step, callback) {
var datauri;
if (src.match(/^data:/i)) {
@@ -25,18 +41,42 @@ function LoadImage(ref, name, src, main_callback) {
});
}
else if (ref.options.inBrowser) {
var ext = src.split('.').pop();
var image = document.createElement('img');
var canvas = document.createElement('canvas');
var context = canvas.getContext('2d');
image.onload = function() {
canvas.width = image.naturalWidth;
canvas.height = image.naturalHeight;
context.drawImage(image, 0, 0);
datauri = canvas.toDataURL(ext);
callback(datauri, step);
};
image.src = src;
let notifyBox = document.querySelector('div.notify-box');
let closePopUP = document.getElementById('close-popup');
if(src.indexOf('images/') !== 0 && src.indexOf('./images/') !== 0 && checkForError(src)){
if(notifyBox){
notifyBox.classList.remove('d-none');
notifyBox.classList.add('d-block');
}
if(closePopUP){
closePopUP.addEventListener('click',function(){
if(notifyBox){
notifyBox.classList.remove('d-block');
notifyBox.classList.add('d-none');
}
if(document.querySelector('button.remove'))
document.querySelector('button.remove').click(); // Remove the step due to redundant processing.
location.reload();
});
}
}
else{
var ext = src.split('.').pop();
var image = document.createElement('img');
var canvas = document.createElement('canvas');
var context = canvas.getContext('2d');
image.onload = function() {
canvas.width = image.naturalWidth;
canvas.height = image.naturalHeight;
context.drawImage(image, 0, 0);
datauri = canvas.toDataURL(ext);
callback(datauri, step);
};
image.src = src;
}
}
else {
datauri = require('urify')(src);