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391a73c | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 | import fs from 'fs';
import url from 'url';
import path from 'path';
import _PNG from 'png-js';
import _JPEG from 'jay-peg';
import { parseSvg } from '@react-pdf/svg';
class PNG {
data;
width;
height;
format;
constructor(data) {
const png = new _PNG(data);
this.data = data;
this.width = png.width;
this.height = png.height;
this.format = 'png';
}
static isValid(data) {
return (data &&
Buffer.isBuffer(data) &&
data[0] === 137 &&
data[1] === 80 &&
data[2] === 78 &&
data[3] === 71 &&
data[4] === 13 &&
data[5] === 10 &&
data[6] === 26 &&
data[7] === 10);
}
}
class JPEG {
data;
width;
height;
format;
constructor(data) {
this.data = data;
this.format = 'jpeg';
this.width = 0;
this.height = 0;
if (data.readUInt16BE(0) !== 0xffd8) {
throw new Error('SOI not found in JPEG');
}
const markers = _JPEG.decode(this.data);
let orientation;
for (let i = 0; i < markers.length; i += 1) {
const marker = markers[i];
if (marker.name === 'EXIF' && marker.entries.orientation) {
orientation = marker.entries.orientation;
}
if (marker.name === 'SOF') {
this.width ||= marker.width;
this.height ||= marker.height;
}
}
if (orientation > 4) {
[this.width, this.height] = [this.height, this.width];
}
}
static isValid(data) {
return data && Buffer.isBuffer(data) && data.readUInt16BE(0) === 0xffd8;
}
}
const UNIT_TO_PT = {
px: 72 / 96,
pt: 1,
in: 72,
cm: 72 / 2.54,
mm: 72 / 25.4,
};
function parseNumber(value) {
if (typeof value !== 'string')
return undefined;
const match = value.match(/^(-?\d*\.?\d+)(px|pt|in|cm|mm)?$/);
if (!match)
return undefined;
const num = parseFloat(match[1]);
const unit = match[2];
if (!unit)
return num;
return num * (UNIT_TO_PT[unit] ?? 1);
}
function parseViewBox(value) {
if (typeof value !== 'string')
return undefined;
const parts = value
.trim()
.split(/[\s,]+/)
.map(Number);
if (parts.length !== 4 || parts.some(isNaN))
return undefined;
return {
minX: parts[0],
minY: parts[1],
maxX: parts[2],
maxY: parts[3],
};
}
class SVG {
data;
width;
height;
format;
constructor(data) {
const svgString = data.toString('utf-8');
const parsed = parseSvg(svgString);
const viewBox = parseViewBox(parsed.props.viewBox);
this.data = parsed;
this.format = 'svg';
this.width = parseNumber(parsed.props.width) ?? viewBox?.maxX ?? 0;
this.height = parseNumber(parsed.props.height) ?? viewBox?.maxY ?? 0;
}
static isValid(data) {
if (!Buffer.isBuffer(data))
return false;
const str = data.toString('utf-8').trimStart();
return str.startsWith('<?xml') || str.startsWith('<svg');
}
}
const createCache = ({ limit = 100 } = {}) => {
let cache = new Map();
return {
get: (key) => key ? cache.get(key) ?? undefined : null,
set: (key, value) => {
cache.delete(key);
if (cache.size >= limit) {
const firstKey = cache.keys().next().value;
cache.delete(firstKey);
}
cache.set(key, value);
},
reset: () => {
cache = new Map();
},
length: () => cache.size,
};
};
const IMAGE_CACHE = createCache({ limit: 30 });
const isBuffer = Buffer.isBuffer;
const isBlob = (src) => {
return typeof Blob !== 'undefined' && src instanceof Blob;
};
const isDataImageSrc = (src) => {
return 'data' in src;
};
const isDataUri = (imageSrc) => 'uri' in imageSrc && imageSrc.uri.startsWith('data:');
const getAbsoluteLocalPath = (src) => {
const { protocol, auth, host, port, hostname, path: pathname, } = url.parse(src);
const absolutePath = pathname ? path.resolve(src) : undefined;
if ((protocol && protocol !== 'file:') || auth || host || port || hostname) {
return undefined;
}
return absolutePath;
};
const fetchLocalFile = (src) => new Promise((resolve, reject) => {
try {
if (false) ;
const absolutePath = getAbsoluteLocalPath(src.uri);
if (!absolutePath) {
reject(new Error(`Cannot fetch non-local path: ${src.uri}`));
return;
}
fs.readFile(absolutePath, (err, data) => err ? reject(err) : resolve(data));
}
catch (err) {
reject(err);
}
});
const fetchRemoteFile = async (src) => {
const { method = 'GET', headers, body, credentials } = src;
const response = await fetch(src.uri, {
method,
headers,
body,
credentials,
});
const buffer = await response.arrayBuffer();
return Buffer.from(buffer);
};
const isValidFormat = (format) => {
const lower = format.toLowerCase();
return (lower === 'jpg' ||
lower === 'jpeg' ||
lower === 'png' ||
lower === 'svg' ||
lower === 'svg+xml');
};
const getImageFormat = (buffer) => {
let format;
if (JPEG.isValid(buffer)) {
format = 'jpg';
}
else if (PNG.isValid(buffer)) {
format = 'png';
}
else if (SVG.isValid(buffer)) {
format = 'svg';
}
return format;
};
function getImage(body, format) {
switch (format.toLowerCase()) {
case 'jpg':
case 'jpeg':
return new JPEG(body);
case 'png':
return new PNG(body);
case 'svg':
case 'svg+xml':
return new SVG(body);
default:
return null;
}
}
const resolveBase64Image = async ({ uri }) => {
const match = /^data:image\/([a-zA-Z+]*);base64,([^"]*)/g.exec(uri);
if (!match)
throw new Error(`Invalid base64 image: ${uri}`);
const format = match[1];
const data = match[2];
if (!isValidFormat(format))
throw new Error(`Base64 image invalid format: ${format}`);
return getImage(Buffer.from(data, 'base64'), format);
};
const resolveImageFromData = async (src) => {
if (src.data && src.format) {
return getImage(src.data, src.format);
}
throw new Error(`Invalid data given for local file: ${JSON.stringify(src)}`);
};
const resolveBufferImage = async (buffer) => {
const format = getImageFormat(buffer);
if (format) {
return getImage(buffer, format);
}
return null;
};
const resolveBlobImage = async (blob) => {
const { type } = blob;
if (!type || type === 'application/octet-stream') {
const arrayBuffer = await blob.arrayBuffer();
const buffer = Buffer.from(arrayBuffer);
return resolveBufferImage(buffer);
}
if (!type.startsWith('image/')) {
throw new Error(`Invalid blob type: ${type}`);
}
const format = type.replace('image/', '');
if (!isValidFormat(format)) {
throw new Error(`Invalid blob type: ${type}`);
}
const buffer = await blob.arrayBuffer();
return getImage(Buffer.from(buffer), format);
};
const resolveImageFromUrl = async (src) => {
const data = getAbsoluteLocalPath(src.uri)
? await fetchLocalFile(src)
: await fetchRemoteFile(src);
const format = getImageFormat(data);
if (!format) {
throw new Error('Not valid image extension');
}
return getImage(data, format);
};
const getCacheKey = (src) => {
if (isBlob(src) || isBuffer(src))
return null;
if (isDataImageSrc(src))
return src.data?.toString('base64') ?? null;
return src.uri;
};
const resolveImage = (src, { cache = true } = {}) => {
let image;
const cacheKey = getCacheKey(src);
if (isBlob(src)) {
image = resolveBlobImage(src);
}
else if (isBuffer(src)) {
image = resolveBufferImage(src);
}
else if (cache && IMAGE_CACHE.get(cacheKey)) {
return IMAGE_CACHE.get(cacheKey);
}
else if (isDataUri(src)) {
image = resolveBase64Image(src);
}
else if (isDataImageSrc(src)) {
image = resolveImageFromData(src);
}
else {
image = resolveImageFromUrl(src);
}
if (cache && cacheKey) {
IMAGE_CACHE.set(cacheKey, image);
}
return image;
};
export { resolveImage as default };
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