git ssb - Merge pull request #64 from ssbc/remove-exif

Commit 766cfe96c4ca2476522a4214b7144b8a2e78b60d

Merge pull request #64 from ssbc/remove-exif

Add the ability to remove exif data

Anders Rune Jensen authored on 5/30/2018, 7:59:12 PM
GitHub committed on 5/30/2018, 7:59:12 PM
Parent: ba3a2674f63fa05229e42bfed91b68333405c1a9
Parent: 6165433879b4b23dc7e1435ca5bf81275ebb508f

Files changed

blob/html/input.js	changed
package.json	changed

blob/html/input.jsView
		@@ -8,13 +8,13 @@
8	8 …	var Defer = require('pull-defer')
9	9 …	var BoxStream = require('pull-box-stream')
10	10 …	var crypto = require('crypto')
11	11 …	var zeros = Buffer.alloc(24, 0)
	12 …	+var piexif = require('piexifjs')
12	13 …
13	14 …	module.exports = {
14	15 …	needs: nest({
15	16 …	'sbot.obs.connection': 'first'
16		-
17	17 …	}),
18	18 …	gives: nest('blob.html.input'),
19	19 …	create: function (api) {
20	20 …	return nest('blob.html.input', function FileInput (onAdded, opts = {}) {
		@@ -27,12 +27,18 @@
27	27 …
28	28 …	var mimeType = mime(file.name)
29	29 …	var fileName = file.name
30	30 …
31		- // handle exif orientation data and resize
32		- getOrientation(file, (orientation) => {
	31 …	+ getFileData(file, function(fileData) {
	32 …	+ var orientation = getOrientation(fileData)
	33 …	+
	34 …	+ if ((typeof opts.removeExif == 'function' && opts.removeExif()) \|\|
	35 …	+ opts.removeExif === true)
	36 …	+ fileData = removeExif(fileData, orientation)
	37 …	+
	38 …	+ // handle exif orientation data and resize
33	39 …	if (orientation >= 3 \|\| opts.resize) {
34		- getImage(file, (image) => {
	40 …	+ getImage(fileData, (image) => {
35	41 …	image = rotate(image, orientation)
36	42 …	if (opts.resize) {
37	43 …	image = resize(image, opts.resize.width, opts.resize.height)
38	44 …	}
		@@ -43,17 +49,28 @@
43	49 …	image.toBlob(blob => {
44	50 …	next(blob)
45	51 …	}, mimeType, 0.85)
46	52 …	} else {
47		- next(file)
	53 …	+ next(dataURItoBlob(fileData))
48	54 …	}
49	55 …	})
50	56 …	} else {
51	57 …	// don't process
52		- next(file)
	58 …	+ next(dataURItoBlob(fileData))
53	59 …	}
54	60 …	})
55	61 …
	62 …	+ function dataURItoBlob(dataURI) {
	63 …	+ var byteString = atob(dataURI.split(',')[1]);
	64 …	+ var mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0]
	65 …	+ var ab = new ArrayBuffer(byteString.length);
	66 …	+ var ia = new Uint8Array(ab);
	67 …	+ for (var i = 0; i < byteString.length; i++) {
	68 …	+ ia[i] = byteString.charCodeAt(i);
	69 …	+ }
	70 …	+ return new Blob([ab], {type: mimeString});
	71 …	+ }
	72 …	+
56	73 …	function next (file) {
57	74 …	var reader = new global.FileReader()
58	75 …	reader.onload = function () {
59	76 …	var stream = pull.values(split(new Buffer(reader.result), 64 * 1024))
		@@ -82,9 +99,9 @@
82	99 …
83	100 …	function getImage (file, cb) {
84	101 …	var image = document.createElement('img')
85	102 …	image.onload = () => cb(image)
86		- image.src = global.URL.createObjectURL(file)
	103 …	+ image.src = file
87	104 …	image.style.display = 'block'
88	105 …	if (image.complete) cb(image)
89	106 …	}
90	107 …
		@@ -110,40 +127,34 @@
110	127 …	ctx.drawImage(image, -offsetX, -offsetY, finalWidth, finalHeight)
WritePreview
111	128 …	return canvas
112	129 …	}
113	130 …
114		-function getOrientation (file, callback) {
	131 …	+function getFileData(file, cb)
	132 …	+{
115	133 …	var reader = new global.FileReader()
116	134 …	reader.onload = function (e) {
117		- var view = new DataView(e.target.result)
118		- if (view.getUint16(0, false) !== 0xFFD8) return callback(-2)
119		- var length = view.byteLength
120		- var offset = 2
121		- while (offset < length) {
122		- var marker = view.getUint16(offset, false)
123		- offset += 2
124		- if (marker === 0xFFE1) {
125		- if (view.getUint32(offset += 2, false) !== 0x45786966) return callback(-1)
126		- var little = view.getUint16(offset += 6, false) === 0x4949
127		- offset += view.getUint32(offset + 4, little)
128		- var tags = view.getUint16(offset, little)
129		- offset += 2
130		- for (var i = 0; i < tags; i++) {
131		- if (view.getUint16(offset + (i * 12), little) === 0x0112) {
132		- return callback(view.getUint16(offset + (i * 12) + 8, little))
133		- }
134		- }
135		- } else if ((marker & 0xFF00) !== 0xFF00) {
136		- break
137		- } else {
138		- offset += view.getUint16(offset, false)
139		- }
140		- }
141		- return callback(-1)
	135 …	+ cb(e.target.result)
142	136 …	}
143		- reader.readAsArrayBuffer(file)
	137 …	+ reader.readAsDataURL(file)
144	138 …	}
145	139 …
	140 …	+function removeExif (fileData, orientation) {
	141 …	+ var clean = piexif.remove(fileData)
	142 …	+ if (orientation != undefined) { // preserve
	143 …	+ var exifData = { "0th": {} }
	144 …	+ exifData["0th"][piexif.ImageIFD.Orientation] = orientation
	145 …	+ var exifStr = piexif.dump(exifData)
	146 …	+ return piexif.insert(exifStr, clean)
	147 …	+ }
	148 …	+ else
	149 …	+ return clean
	150 …	+}
	151 …	+
	152 …	+function getOrientation (fileData) {
	153 …	+ var exif = piexif.load(fileData);
	154 …	+ return exif["0th"][piexif.ImageIFD.Orientation]
	155 …	+}
	156 …	+
146	157 …	function rotate (img, orientation) {
147	158 …	var canvas = document.createElement('canvas')
148	159 …	var ctx = canvas.getContext('2d')
149	160 …

package.jsonView
		@@ -42,8 +42,9 @@
42	42 …	"html-escape": "^2.0.0",
43	43 …	"human-time": "0.0.1",
44	44 …	"mutant": "^3.21.2",
45	45 …	"mutant-pull-reduce": "^1.1.0",
	46 …	+ "piexifjs": "^1.0.4",
46	47 …	"pull-abortable": "^4.1.0",
47	48 …	"pull-box-stream": "~1.0.13",
48	49 …	"pull-cat": "^1.1.11",
49	50 …	"pull-defer": "~0.2.2",

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dinoworm 🐛 / patchcore

Commit 766cfe96c4ca2476522a4214b7144b8a2e78b60d

Merge pull request #64 from ssbc/remove-exif

Files changed