I have a zip with a bunch of folders containing one or more png-files each that I want to render to the DOM.
zip.loadAsync(file) .then(function(zip) {
zip.file('textfile.txt')
.async("string")
.then(function (content) { console.log(content); });
}, function (e) {
console.log("Error reading " + file.name + " : " + e.message); });
I can read a text file, but I'm stuck when it comes to getting the binary data from an image file.
My thought is that I should use URL.createObjectURL( blob ) to create a reference to the files and then render <img id="output" src="blob:null/341e9aeb-a794-4033-87f5-e8d075e9868a"> for each image in the zip.
How can I get the images from the zip?
Thanks!
You can use .async("base64") to return base64 representation of image file; prepend data:[<mediatype>][;base64], to content where content is <data>; set img src to data URI string.
<script src="https://cdnjs.cloudflare.com/ajax/libs/jszip/3.1.3/jszip.min.js"></script>
<head>
<script>
window.onload = function() {
var zip = new JSZip();
function loadImage(url) {
var request = new XMLHttpRequest();
request.open("GET", url);
request.responseType = "blob";
request.onload = function() {
console.log(this.response);
var response = this.response;
var filename = "image." + response.type.split("/")[1];
zip.file(filename, response);
zip.file(filename)
.async("base64")
.then(function(content) {
console.log(content);
var img = new Image;
img.onload = function() {
document.body.appendChild(this)
}
img.src = "data:" + response.type + ";base64," + content;
},
function(e) {
console.log("Error reading "
+ file.name + " : "
+ e.message);
});
}
request.send()
}
loadImage("https://placeholdit.imgix.net/~text?txtsize=33&txt=350%C3%97150&w=350&h=150")
}
</script>
</head>
<body>
</body>Alternatively, using .async("arraybuffer"), Blob(), Uint8Array(), URL.createObjectURL()
zip.file(filename)
.async("arraybuffer")
.then(function(content) {
console.log(content);
var buffer = new Uint8Array(content);
var blob = new Blob([buffer.buffer]);
console.log(blob);
var img = new Image;
img.onload = function() {
document.body.appendChild(this)
}
img.src = URL.createObjectURL(blob);
},
function(e) {
console.log("Error reading " + file.name + " : " + e.message);
});