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Retirer ExifRestorer (#75178) #152

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bdauvergne wants to merge 1 commits from wip/75178-Retirer-l-application-d-ExifRest into main
pull from: wip/75178-Retirer-l-application-d-ExifRest
merge into: entrouvert:main
Conversation 3 Commits 1 Files Changed 1 +10 -206
1 changed files with 10 additions and 206 deletions
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216
wcs/qommon/static/js/qommon.fileupload.js
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@ -1,194 +1,3 @@
var ExifRestorer = (function()
{
// from http://www.perry.cz/files/ExifRestorer.js
// based on MinifyJpeg
// http://elicon.blog57.fc2.com/blog-entry-206.html
var ExifRestorer = {};
ExifRestorer.KEY_STR = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
ExifRestorer.encode64 = function(input)
{
var output = "",
chr1, chr2, chr3 = "",
enc1, enc2, enc3, enc4 = "",
i = 0;
do {
chr1 = input[i++];
chr2 = input[i++];
chr3 = input[i++];
enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
enc4 = chr3 & 63;
if (isNaN(chr2)) {
enc3 = enc4 = 64;
} else if (isNaN(chr3)) {
enc4 = 64;
}
output = output +
this.KEY_STR.charAt(enc1) +
this.KEY_STR.charAt(enc2) +
this.KEY_STR.charAt(enc3) +
this.KEY_STR.charAt(enc4);
chr1 = chr2 = chr3 = "";
enc1 = enc2 = enc3 = enc4 = "";
} while (i < input.length);
return output;
};
ExifRestorer.restore = function(origFileBase64, resizedFileBase64)
{
if (!origFileBase64.match("data:image/jpeg;base64,"))
{
return resizedFileBase64;
}
var rawImage = this.decode64(origFileBase64.replace("data:image/jpeg;base64,", ""));
var segments = this.slice2Segments(rawImage);
var image = this.exifManipulation(resizedFileBase64, segments);
return this.encode64(image);
};
ExifRestorer.restore_as_blob = function(origFileBase64, resizedFileBase64) {
var b64Data = ExifRestorer.restore(origFileBase64, resizedFileBase64);
contentType = 'image/jpeg';
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);
}
return new Blob(byteArrays, {type: contentType});
};
ExifRestorer.exifManipulation = function(resizedFileBase64, segments)
{
var exifArray = this.getExifArray(segments),
newImageArray = this.insertExif(resizedFileBase64, exifArray),
aBuffer = new Uint8Array(newImageArray);
return aBuffer;
};
ExifRestorer.getExifArray = function(segments)
{
var seg;
for (var x = 0; x < segments.length; x++)
{
seg = segments[x];
if (seg[0] == 255 & seg[1] == 225) //(ff e1)
{
return seg;
}
}
return [];
};
ExifRestorer.insertExif = function(resizedFileBase64, exifArray)
{
var imageData = resizedFileBase64.replace("data:image/jpeg;base64,", ""),
buf = this.decode64(imageData),
separatePoint = buf.indexOf(255,3),
mae = buf.slice(0, separatePoint),
ato = buf.slice(separatePoint),
array = mae;
array = array.concat(exifArray);
array = array.concat(ato);
return array;
};
ExifRestorer.slice2Segments = function(rawImageArray)
{
var head = 0,
segments = [];
while (1)
{
if (rawImageArray[head] == 255 & rawImageArray[head + 1] == 218){break;}
if (rawImageArray[head] == 255 & rawImageArray[head + 1] == 216)
{
head += 2;
}
else
{
var length = rawImageArray[head + 2] * 256 + rawImageArray[head + 3],
endPoint = head + length + 2,
seg = rawImageArray.slice(head, endPoint);
segments.push(seg);
head = endPoint;
}
if (head > rawImageArray.length){break;}
}
return segments;
};
ExifRestorer.decode64 = function(input)
{
var output = "",
chr1, chr2, chr3 = "",
enc1, enc2, enc3, enc4 = "",
i = 0,
buf = [];
// remove all characters that are not A-Z, a-z, 0-9, +, /, or =
var base64test = /[^A-Za-z0-9\+\/\=]/g;
if (base64test.exec(input)) {
alert("There were invalid base64 characters in the input text.\n" +
"Valid base64 characters are A-Z, a-z, 0-9, '+', '/',and '='\n" +
"Expect errors in decoding.");
}
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
do {
enc1 = this.KEY_STR.indexOf(input.charAt(i++));
enc2 = this.KEY_STR.indexOf(input.charAt(i++));
enc3 = this.KEY_STR.indexOf(input.charAt(i++));
enc4 = this.KEY_STR.indexOf(input.charAt(i++));
chr1 = (enc1 << 2) | (enc2 >> 4);
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
chr3 = ((enc3 & 3) << 6) | enc4;
buf.push(chr1);
if (enc3 != 64) {
buf.push(chr2);
}
if (enc4 != 64) {
buf.push(chr3);
}
chr1 = chr2 = chr3 = "";
enc1 = enc2 = enc3 = enc4 = "";
} while (i < input.length);
return buf;
};
return ExifRestorer;
})();
$.WcsFileUpload = {
prepare: function() {
var base_widget = $(this);
@ -278,22 +87,17 @@ $.WcsFileUpload = {
ctx.drawImage(img, 0, 0, width, height);
var new_image_64 = canvas.toDataURL('image/jpeg', 0.95);
var blob = null;
if (data.files[0].type == 'image/jpeg') {
blob = ExifRestorer.restore_as_blob(original_image_64, new_image_64);
blob.name = data.files[0].name;
} else {
// adapted from dataURItoBlob, from
// https://stackoverflow.com/questions/12168909/blob-from-dataurl#12300351
var byteString = atob(new_image_64.split(',')[1]);
var mimeString = new_image_64.split(',')[0].split(':')[1].split(';')[0]
var ab = new ArrayBuffer(byteString.length);
var ia = new Uint8Array(ab);
for (var i = 0; i < byteString.length; i++) {
ia[i] = byteString.charCodeAt(i);
}
blob = new Blob([ab], {type: mimeString});
blob.name = data.files[0].name + '.jpg';
// adapted from dataURItoBlob, from
// https://stackoverflow.com/questions/12168909/blob-from-dataurl#12300351
var byteString = atob(new_image_64.split(',')[1]);
var mimeString = new_image_64.split(',')[0].split(':')[1].split(';')[0]
var ab = new ArrayBuffer(byteString.length);
var ia = new Uint8Array(ab);
for (var i = 0; i < byteString.length; i++) {
ia[i] = byteString.charCodeAt(i);
}
blob = new Blob([ab], {type: mimeString});
blob.name = data.files[0].name + '.jpg';
data.files[0] = blob;
}
$(base_widget).find('.file-button').trigger('wcs:image-blob', data.files[0]);