Add node_modules

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data-uri-to-buffer
==================
### Generate a Buffer instance from a [Data URI][rfc] string
[![Build Status](https://travis-ci.org/TooTallNate/node-data-uri-to-buffer.svg?branch=master)](https://travis-ci.org/TooTallNate/node-data-uri-to-buffer)
This module accepts a ["data" URI][rfc] String of data, and returns a
node.js `Buffer` instance with the decoded data.
Installation
------------
Install with `npm`:
``` bash
$ npm install data-uri-to-buffer
```
Example
-------
``` js
var dataUriToBuffer = require('data-uri-to-buffer');
// plain-text data is supported
var uri = 'data:,Hello%2C%20World!';
var decoded = dataUriToBuffer(uri);
console.log(decoded.toString());
// 'Hello, World!'
// base64-encoded data is supported
uri = 'data:text/plain;base64,SGVsbG8sIFdvcmxkIQ%3D%3D';
decoded = dataUriToBuffer(uri);
console.log(decoded.toString());
// 'Hello, World!'
```
API
---
### dataUriToBuffer(String uri) → Buffer
The `type` property on the Buffer instance gets set to the main type portion of
the "mediatype" portion of the "data" URI, or defaults to `"text/plain"` if not
specified.
The `typeFull` property on the Buffer instance gets set to the entire
"mediatype" portion of the "data" URI (including all parameters), or defaults
to `"text/plain;charset=US-ASCII"` if not specified.
The `charset` property on the Buffer instance gets set to the Charset portion of
the "mediatype" portion of the "data" URI, or defaults to `"US-ASCII"` if the
entire type is not specified, or defaults to `""` otherwise.
*Note*: If the only the main type is specified but not the charset, e.g.
`"data:text/plain,abc"`, the charset is set to the empty string. The spec only
defaults to US-ASCII as charset if the entire type is not specified.
License
-------
(The MIT License)
Copyright (c) 2014 Nathan Rajlich <nathan@tootallnate.net>
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
'Software'), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
[rfc]: http://tools.ietf.org/html/rfc2397

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/// <reference types="node" />
export interface MimeBuffer extends Buffer {
type: string;
typeFull: string;
charset: string;
}
/**
* Returns a `Buffer` instance from the given data URI `uri`.
*
* @param {String} uri Data URI to turn into a Buffer instance
* @returns {Buffer} Buffer instance from Data URI
* @api public
*/
export declare function dataUriToBuffer(uri: string): MimeBuffer;
export default dataUriToBuffer;

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/**
* Returns a `Buffer` instance from the given data URI `uri`.
*
* @param {String} uri Data URI to turn into a Buffer instance
* @returns {Buffer} Buffer instance from Data URI
* @api public
*/
export function dataUriToBuffer(uri) {
if (!/^data:/i.test(uri)) {
throw new TypeError('`uri` does not appear to be a Data URI (must begin with "data:")');
}
// strip newlines
uri = uri.replace(/\r?\n/g, '');
// split the URI up into the "metadata" and the "data" portions
const firstComma = uri.indexOf(',');
if (firstComma === -1 || firstComma <= 4) {
throw new TypeError('malformed data: URI');
}
// remove the "data:" scheme and parse the metadata
const meta = uri.substring(5, firstComma).split(';');
let charset = '';
let base64 = false;
const type = meta[0] || 'text/plain';
let typeFull = type;
for (let i = 1; i < meta.length; i++) {
if (meta[i] === 'base64') {
base64 = true;
}
else {
typeFull += `;${meta[i]}`;
if (meta[i].indexOf('charset=') === 0) {
charset = meta[i].substring(8);
}
}
}
// defaults to US-ASCII only if type is not provided
if (!meta[0] && !charset.length) {
typeFull += ';charset=US-ASCII';
charset = 'US-ASCII';
}
// get the encoded data portion and decode URI-encoded chars
const encoding = base64 ? 'base64' : 'ascii';
const data = unescape(uri.substring(firstComma + 1));
const buffer = Buffer.from(data, encoding);
// set `.type` and `.typeFull` properties to MIME type
buffer.type = type;
buffer.typeFull = typeFull;
// set the `.charset` property
buffer.charset = charset;
return buffer;
}
export default dataUriToBuffer;
//# sourceMappingURL=index.js.map

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/// <reference types="node" />
export interface MimeBuffer extends Buffer {
type: string;
typeFull: string;
charset: string;
}
/**
* Returns a `Buffer` instance from the given data URI `uri`.
*
* @param {String} uri Data URI to turn into a Buffer instance
* @returns {Buffer} Buffer instance from Data URI
* @api public
*/
export declare function dataUriToBuffer(uri: string): MimeBuffer;
export default dataUriToBuffer;

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/**
* Returns a `Buffer` instance from the given data URI `uri`.
*
* @param {String} uri Data URI to turn into a Buffer instance
* @returns {Buffer} Buffer instance from Data URI
* @api public
*/
export function dataUriToBuffer(uri) {
if (!/^data:/i.test(uri)) {
throw new TypeError('`uri` does not appear to be a Data URI (must begin with "data:")');
}
// strip newlines
uri = uri.replace(/\r?\n/g, '');
// split the URI up into the "metadata" and the "data" portions
const firstComma = uri.indexOf(',');
if (firstComma === -1 || firstComma <= 4) {
throw new TypeError('malformed data: URI');
}
// remove the "data:" scheme and parse the metadata
const meta = uri.substring(5, firstComma).split(';');
let charset = '';
let base64 = false;
const type = meta[0] || 'text/plain';
let typeFull = type;
for (let i = 1; i < meta.length; i++) {
if (meta[i] === 'base64') {
base64 = true;
}
else {
typeFull += `;${meta[i]}`;
if (meta[i].indexOf('charset=') === 0) {
charset = meta[i].substring(8);
}
}
}
// defaults to US-ASCII only if type is not provided
if (!meta[0] && !charset.length) {
typeFull += ';charset=US-ASCII';
charset = 'US-ASCII';
}
// get the encoded data portion and decode URI-encoded chars
const encoding = base64 ? 'base64' : 'ascii';
const data = unescape(uri.substring(firstComma + 1));
const buffer = Buffer.from(data, encoding);
// set `.type` and `.typeFull` properties to MIME type
buffer.type = type;
buffer.typeFull = typeFull;
// set the `.charset` property
buffer.charset = charset;
return buffer;
}
export default dataUriToBuffer;
//# sourceMappingURL=index.js.map

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/**
* Module dependencies.
*/
export {};

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/**
* Module dependencies.
*/
import assert from 'assert';
import dataUriToBuffer from '../src';
describe('data-uri-to-buffer', function () {
it('should decode bare-bones Data URIs', function () {
var uri = 'data:,Hello%2C%20World!';
var buf = dataUriToBuffer(uri);
assert.equal('text/plain', buf.type);
assert.equal('text/plain;charset=US-ASCII', buf.typeFull);
assert.equal('US-ASCII', buf.charset);
assert.equal('Hello, World!', buf.toString());
});
it('should decode bare-bones "base64" Data URIs', function () {
var uri = 'data:text/plain;base64,SGVsbG8sIFdvcmxkIQ%3D%3D';
var buf = dataUriToBuffer(uri);
assert.equal('text/plain', buf.type);
assert.equal('Hello, World!', buf.toString());
});
it('should decode plain-text Data URIs', function () {
var html = '<!DOCTYPE html>' +
'<html lang="en">' +
'<head><title>Embedded Window</title></head>' +
'<body><h1>42</h1></body>' +
'</html>';
// Escape the HTML for URL formatting
var uri = 'data:text/html;charset=utf-8,' + encodeURIComponent(html);
var buf = dataUriToBuffer(uri);
assert.equal('text/html', buf.type);
assert.equal('utf-8', buf.charset);
assert.equal(html, buf.toString());
});
// the next 4 tests are from:
// https://bug161965.bugzilla.mozilla.org/attachment.cgi?id=94670&action=view
it('should decode "ISO-8859-8 in Base64" URIs', function () {
var uri = 'data:text/plain;charset=iso-8859-8-i;base64,+ezl7Q==';
var buf = dataUriToBuffer(uri);
assert.equal('text/plain', buf.type);
assert.equal('iso-8859-8-i', buf.charset);
assert.equal(4, buf.length);
assert.equal(0xf9, buf[0]);
assert.equal(0xec, buf[1]);
assert.equal(0xe5, buf[2]);
assert.equal(0xed, buf[3]);
});
it('should decode "ISO-8859-8 in URL-encoding" URIs', function () {
var uri = 'data:text/plain;charset=iso-8859-8-i,%f9%ec%e5%ed';
var buf = dataUriToBuffer(uri);
assert.equal('text/plain', buf.type);
assert.equal('iso-8859-8-i', buf.charset);
assert.equal(4, buf.length);
assert.equal(0xf9, buf[0]);
assert.equal(0xec, buf[1]);
assert.equal(0xe5, buf[2]);
assert.equal(0xed, buf[3]);
});
it('should decode "UTF-8 in Base64" URIs', function () {
var uri = 'data:text/plain;charset=UTF-8;base64,16nXnNeV150=';
var buf = dataUriToBuffer(uri);
assert.equal('text/plain', buf.type);
assert.equal('UTF-8', buf.charset);
assert.equal(8, buf.length);
assert.equal('שלום', buf.toString('utf8'));
});
it('should decode "UTF-8 in URL-encoding" URIs', function () {
var uri = 'data:text/plain;charset=UTF-8,%d7%a9%d7%9c%d7%95%d7%9d';
var buf = dataUriToBuffer(uri);
assert.equal('text/plain', buf.type);
assert.equal('UTF-8', buf.charset);
assert.equal(8, buf.length);
assert.equal('שלום', buf.toString('utf8'));
});
// this next one is from Wikipedia IIRC
it('should decode "base64" Data URIs with newlines', function () {
var uri = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUA\n' +
'AAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO\n' +
'9TXL0Y4OHwAAAABJRU5ErkJggg==';
var buf = dataUriToBuffer(uri);
assert.equal('image/png', buf.type);
assert.equal('iVBORw0KGgoAAAANSUhEUgAAAAUA' +
'AAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO' +
'9TXL0Y4OHwAAAABJRU5ErkJggg==', buf.toString('base64'));
});
it('should decode a plain-text URI with a space character in it', function () {
var uri = 'data:,foo bar';
var buf = dataUriToBuffer(uri);
assert.equal('text/plain', buf.type);
assert.equal('foo bar', buf.toString());
});
it('should decode data with a "," comma char', function () {
var uri = 'data:,a,b';
var buf = dataUriToBuffer(uri);
assert.equal('text/plain', buf.type);
assert.equal('a,b', buf.toString());
});
it('should decode data with traditionally reserved characters like ";"', function () {
var uri = 'data:,;test';
var buf = dataUriToBuffer(uri);
assert.equal('text/plain', buf.type);
assert.equal(';test', buf.toString());
});
it('should not default to US-ASCII if main type is provided', function () {
var uri = 'data:text/plain,abc';
var buf = dataUriToBuffer(uri);
assert.equal('text/plain', buf.type);
assert.equal('text/plain', buf.typeFull);
assert.equal('', buf.charset);
assert.equal('abc', buf.toString());
});
it('should default to text/plain if main type is not provided', function () {
var uri = 'data:;charset=UTF-8,abc';
var buf = dataUriToBuffer(uri);
assert.equal('text/plain', buf.type);
assert.equal('text/plain;charset=UTF-8', buf.typeFull);
assert.equal('UTF-8', buf.charset);
assert.equal('abc', buf.toString());
});
it('should not allow charset without a leading ;', function () {
var uri = 'data:charset=UTF-8,abc';
var buf = dataUriToBuffer(uri);
assert.equal('charset=UTF-8', buf.type);
assert.equal('charset=UTF-8', buf.typeFull);
assert.equal('', buf.charset);
assert.equal('abc', buf.toString());
});
it('should allow custom media type parameters', function () {
var uri = 'data:application/javascript;version=1.8;charset=UTF-8,abc';
var buf = dataUriToBuffer(uri);
assert.equal('application/javascript', buf.type);
assert.equal('application/javascript;version=1.8;charset=UTF-8', buf.typeFull);
assert.equal('UTF-8', buf.charset);
assert.equal('abc', buf.toString());
});
it('should allow base64 annotation anywhere', function () {
var uri = 'data:text/plain;base64;charset=UTF-8,YWJj';
var buf = dataUriToBuffer(uri);
assert.equal('text/plain', buf.type);
assert.equal('text/plain;charset=UTF-8', buf.typeFull);
assert.equal('UTF-8', buf.charset);
assert.equal('abc', buf.toString());
});
});
//# sourceMappingURL=test.js.map

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{
"name": "data-uri-to-buffer",
"version": "4.0.0",
"description": "Generate a Buffer instance from a Data URI string",
"type": "module",
"main": "dist/index.js",
"types": "dist/index.d.ts",
"files": [
"dist",
"src"
],
"scripts": {
"build": "tsc",
"test": "jest",
"prepublishOnly": "npm run build"
},
"repository": {
"type": "git",
"url": "git://github.com/TooTallNate/node-data-uri-to-buffer.git"
},
"engines": {
"node": ">= 12"
},
"keywords": [
"data",
"uri",
"datauri",
"data-uri",
"buffer",
"convert",
"rfc2397",
"2397"
],
"author": "Nathan Rajlich <nathan@tootallnate.net> (http://n8.io/)",
"license": "MIT",
"bugs": {
"url": "https://github.com/TooTallNate/node-data-uri-to-buffer/issues"
},
"homepage": "https://github.com/TooTallNate/node-data-uri-to-buffer",
"devDependencies": {
"@types/es6-promisify": "^5.0.0",
"@types/mocha": "^9.0.0",
"@types/node": "^10.5.3",
"jest": "^27.2.2",
"ts-jest": "^27.0.5",
"typescript": "^4.4.3"
},
"jest": {
"preset": "ts-jest",
"globals": {
"ts-jest": {
"diagnostics": false,
"isolatedModules": true
}
},
"verbose": false,
"testEnvironment": "node",
"testMatch": [
"<rootDir>/test/**/*.test.ts"
]
}
}

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export interface MimeBuffer extends Buffer {
type: string;
typeFull: string;
charset: string;
}
/**
* Returns a `Buffer` instance from the given data URI `uri`.
*
* @param {String} uri Data URI to turn into a Buffer instance
* @returns {Buffer} Buffer instance from Data URI
* @api public
*/
export function dataUriToBuffer(uri: string): MimeBuffer {
if (!/^data:/i.test(uri)) {
throw new TypeError(
'`uri` does not appear to be a Data URI (must begin with "data:")'
);
}
// strip newlines
uri = uri.replace(/\r?\n/g, '');
// split the URI up into the "metadata" and the "data" portions
const firstComma = uri.indexOf(',');
if (firstComma === -1 || firstComma <= 4) {
throw new TypeError('malformed data: URI');
}
// remove the "data:" scheme and parse the metadata
const meta = uri.substring(5, firstComma).split(';');
let charset = '';
let base64 = false;
const type = meta[0] || 'text/plain';
let typeFull = type;
for (let i = 1; i < meta.length; i++) {
if (meta[i] === 'base64') {
base64 = true;
} else {
typeFull += `;${ meta[i]}`;
if (meta[i].indexOf('charset=') === 0) {
charset = meta[i].substring(8);
}
}
}
// defaults to US-ASCII only if type is not provided
if (!meta[0] && !charset.length) {
typeFull += ';charset=US-ASCII';
charset = 'US-ASCII';
}
// get the encoded data portion and decode URI-encoded chars
const encoding = base64 ? 'base64' : 'ascii';
const data = unescape(uri.substring(firstComma + 1));
const buffer = Buffer.from(data, encoding) as MimeBuffer;
// set `.type` and `.typeFull` properties to MIME type
buffer.type = type;
buffer.typeFull = typeFull;
// set the `.charset` property
buffer.charset = charset;
return buffer;
}
export default dataUriToBuffer;