data-uri-to-buffer - npm Package Compare versions

Comparing version 5.0.1 to 6.0.0

./dist/index.js

 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.dataUriToBuffer = void 0;
+function base64ToArrayBuffer(base64) {
+    const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
+    const bytes = [];
+    for (let i = 0; i < base64.length; i += 4) {
+        const idx0 = chars.indexOf(base64.charAt(i));
+        const idx1 = chars.indexOf(base64.charAt(i + 1));
+        const idx2 = base64.charAt(i + 2) === '='
+            ? 0
+            : chars.indexOf(base64.charAt(i + 2));
+        const idx3 = base64.charAt(i + 3) === '='
+            ? 0
+            : chars.indexOf(base64.charAt(i + 3));
+        const bin0 = (idx0 << 2) | (idx1 >> 4);
+        const bin1 = ((idx1 & 15) << 4) | (idx2 >> 2);
+        const bin2 = ((idx2 & 3) << 6) | idx3;
+        bytes.push(bin0);
+        if (base64.charAt(i + 2) !== '=')
+            bytes.push(bin1);
+        if (base64.charAt(i + 3) !== '=')
+            bytes.push(bin2);
+    }
+    const buffer = new ArrayBuffer(bytes.length);
+    const view = new Uint8Array(buffer);
+    view.set(bytes);
+    return buffer;
+}
+function stringToBuffer(str) {
+    // Create a buffer with length equal to the string length
+    const buffer = new ArrayBuffer(str.length);
+    // Create a view to manipulate the buffer content
+    const view = new Uint8Array(buffer);
+    // Iterate over the string and populate the buffer with ASCII codes
+    for (let i = 0; i < str.length; i++) {
+        view[i] = str.charCodeAt(i);
+    }
+    return buffer;
+}
 /**
@@ -8,6 +45,5 @@ * 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
  */
 function dataUriToBuffer(uri) {
+    uri = String(uri);
     if (!/^data:/i.test(uri)) {
@@ -46,14 +82,12 @@ throw new TypeError('`uri` does not appear to be a Data URI (must begin with "data:")');
     // 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;
+    const buffer = base64 ? base64ToArrayBuffer(data) : stringToBuffer(data);
+    return {
+        type,
+        typeFull,
+        charset,
+        buffer,
+    };
 }
 exports.dataUriToBuffer = dataUriToBuffer;
-exports.default = dataUriToBuffer;
 //# sourceMappingURL=index.js.map

dist/index.d.ts

 /// <reference types="node" />
-export interface MimeBuffer extends Buffer {
+export interface ParsedDataURI {
     type: string;
     typeFull: string;
     charset: string;
+    buffer: ArrayBuffer;
 }
@@ -11,7 +12,4 @@ /**
  * @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;
+export declare function dataUriToBuffer(uri: string | URL): ParsedDataURI;
 //# sourceMappingURL=index.d.ts.map

dist/index.js

 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.dataUriToBuffer = void 0;
+function base64ToArrayBuffer(base64) {
+    const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
+    const bytes = [];
+    for (let i = 0; i < base64.length; i += 4) {
+        const idx0 = chars.indexOf(base64.charAt(i));
+        const idx1 = chars.indexOf(base64.charAt(i + 1));
+        const idx2 = base64.charAt(i + 2) === '='
+            ? 0
+            : chars.indexOf(base64.charAt(i + 2));
+        const idx3 = base64.charAt(i + 3) === '='
+            ? 0
+            : chars.indexOf(base64.charAt(i + 3));
+        const bin0 = (idx0 << 2) | (idx1 >> 4);
+        const bin1 = ((idx1 & 15) << 4) | (idx2 >> 2);
+        const bin2 = ((idx2 & 3) << 6) | idx3;
+        bytes.push(bin0);
+        if (base64.charAt(i + 2) !== '=')
+            bytes.push(bin1);
+        if (base64.charAt(i + 3) !== '=')
+            bytes.push(bin2);
+    }
+    const buffer = new ArrayBuffer(bytes.length);
+    const view = new Uint8Array(buffer);
+    view.set(bytes);
+    return buffer;
+}
+function stringToBuffer(str) {
+    // Create a buffer with length equal to the string length
+    const buffer = new ArrayBuffer(str.length);
+    // Create a view to manipulate the buffer content
+    const view = new Uint8Array(buffer);
+    // Iterate over the string and populate the buffer with ASCII codes
+    for (let i = 0; i < str.length; i++) {
+        view[i] = str.charCodeAt(i);
+    }
+    return buffer;
+}
 /**
@@ -8,6 +45,5 @@ * 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
  */
 function dataUriToBuffer(uri) {
+    uri = String(uri);
     if (!/^data:/i.test(uri)) {
@@ -46,14 +82,12 @@ throw new TypeError('`uri` does not appear to be a Data URI (must begin with "data:")');
     // 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;
+    const buffer = base64 ? base64ToArrayBuffer(data) : stringToBuffer(data);
+    return {
+        type,
+        typeFull,
+        charset,
+        buffer,
+    };
 }
 exports.dataUriToBuffer = dataUriToBuffer;
-exports.default = dataUriToBuffer;
 //# sourceMappingURL=index.js.map

package.json

 {
   "name": "data-uri-to-buffer",
-  "version": "5.0.1",
-  "description": "Generate a Buffer instance from a Data URI string",
+  "version": "6.0.0",
+  "description": "Create an ArrayBuffer instance from a Data URI string",
   "main": "./dist/index.js",
@@ -6,0 +6,0 @@ "types": "./dist/index.d.ts",

README.md

 data-uri-to-buffer
 ==================
-### Generate a Buffer instance from a [Data URI][rfc] string
+### Create an ArrayBuffer instance from a [Data URI][rfc] string
 
-This module accepts a ["data" URI][rfc] String of data, and returns a
-node.js `Buffer` instance with the decoded data.
+This module accepts a ["data" URI][rfc] String of data, and returns
+an `ArrayBuffer` instance with the decoded data.
 
+This module is intended to work on a large variety of JavaScript
+runtimes, including Node.js and web browsers.
+
 Example
 -------
 
-``` js
+```typescript
 import { dataUriToBuffer } from 'data-uri-to-buffer';
@@ -16,4 +19,4 @@
 let uri = 'data:,Hello%2C%20World!';
-let decoded = dataUriToBuffer(uri);
-console.log(decoded.toString());
+let parsed = dataUriToBuffer(uri);
+console.log(new TextDecoder().decode(parsed.buffer));
 // 'Hello, World!'
@@ -23,4 +26,4 @@
 uri = 'data:text/plain;base64,SGVsbG8sIFdvcmxkIQ%3D%3D';
-decoded = dataUriToBuffer(uri);
-console.log(decoded.toString());
+parsed = dataUriToBuffer(uri);
+console.log(new TextDecoder().decode(parsed.buffer));
 // 'Hello, World!'
@@ -33,47 +36,29 @@ ```
 
-### dataUriToBuffer(String uri) → Buffer
+```typescript
+export interface ParsedDataURI {
+	type: string;
+	typeFull: string;
+	charset: string;
+	buffer: ArrayBuffer;
+}
+```
 
-The `type` property on the Buffer instance gets set to the main type portion of
+### dataUriToBuffer(uri: string | URL) → ParsedDataURI
+
+The `type` property 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
+The `typeFull` property 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 `charset` property 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.
+*Note*: If 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 <[e-mail]>
-
-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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Improved metrics

Total package byte prevSize

14349

increased by41.29%

Number of package files

8

increased by14.29%

Lines of code

193

increased by51.97%

Worsened metrics

Number of lines in readme file

62

decreased by-19.48%

No dependency changes