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index.html
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<!DOCTYPE html>
<html>
<head>
<title>Image Uploader</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0">
<script src="https://challenges.cloudflare.com/turnstile/v0/api.js" async></script>
<style>
.hide {
display: none;
}
#image-preview {
display: none;
width: 87%;
}
</style>
</head>
<body>
<form action="upload" method="post" enctype="multipart/form-data"> Select image to upload: <center>
<a href="#" class="hide" id="hidden" onclick="getinfo();">Fetch image information</a>
<p id="info"></p>
<img id="image-preview" alt="image preview" />
</center>
<br>
<div class="cf-turnstile" data-sitekey="XXXX"></div>
<input type="file" accept="image/*" name="fileToUpload" id="image-source" onchange="previewImage();" />
<input type="submit" value="Upload Image" name="submit">
</form> Max file size 20 MB, only accept JPG, JPEG, PNG, GIF & WEBP file format.
<script>
function previewImage() {
document.getElementById("image-preview").style.display = "block";
var r = document.getElementById("hidden");
var oFReader = new FileReader();
r.classList.remove("hide");
oFReader.readAsDataURL(document.getElementById("image-source").files[0]);
oFReader.onload = function(oFREvent) {
document.getElementById("image-preview").src = oFREvent.target.result;
};
}
function getinfo() {
var img = document.getElementById("image-source");
var prev = document.getElementById("image-preview");
var s = document.getElementById("hidden");
var sizeKB = img.files[0].size / 1024;
var size = sizeKB.toFixed(2) + "KB";
if (sizeKB > 1024) {
size = (sizeKB / 1024).toFixed(2) + "MB";
}
var width = prev.naturalWidth;
var height = prev.naturalHeight;
s.classList.add("hide");
document.getElementById("info").innerHTML = size + ", " + width + "x" + height;
}
</script>
</body>
</html>