add isDataURI validator

README.md

@@ -64,6 +64,7 @@ Passing anything other than a string is an error.
 - **isByteLength(str, options)** - check if the string's length (in bytes) falls in a range.`options` is an object which defaults to `{min:0, max: undefined}`.
 - **isCreditCard(str)** - check if the string is a credit card.
 - **isCurrency(str, options)** - check if the string is a valid currency amount. `options` is an object which defaults to `{symbol: '$', require_symbol: false, allow_space_after_symbol: false, symbol_after_digits: false, allow_negatives: true, parens_for_negatives: false, negative_sign_before_digits: false, negative_sign_after_digits: false, allow_negative_sign_placeholder: false, thousands_separator: ',', decimal_separator: '.', allow_space_after_digits: false }`.
+- **isDataURI(str)** - check if the string is a [data uri format](https://developer.mozilla.org/en-US/docs/Web/HTTP/data_URIs).
 - **isDate(str)** - check if the string is a date.
 - **isDecimal(str)** - check if the string represents a decimal number, such as 0.1, .3, 1.1, 1.00003, 4.0, etc.
 - **isDivisibleBy(str, number)** - check if the string is a number that's divisible by another.

src/index.js

@@ -64,6 +64,7 @@ import isCurrency from './lib/isCurrency';
 import isISO8601 from './lib/isISO8601';
 
 import isBase64 from './lib/isBase64';
+import isDataURI from './lib/isDataURI';
 
 import ltrim from './lib/ltrim';
 import rtrim from './lib/rtrim';
@@ -103,7 +104,7 @@ const validator = {
   isMobilePhone,
   isCurrency,
   isISO8601,
-  isBase64,
+  isBase64, isDataURI,
   ltrim, rtrim, trim,
   escape, unescape, stripLow,
   whitelist, blacklist,

src/lib/isDataURI.js

@@ -0,0 +1,8 @@
+import assertString from './util/assertString';
+
+const dataURI = /^\s*data:([a-z]+\/[a-z0-9\-\+]+(;[a-z\-]+\=[a-z0-9\-]+)?)?(;base64)?,[a-z0-9\!\$\&\'\,\(\)\*\+\,\;\=\-\.\_\~\:\@\/\?\%\s]*\s*$/i; // eslint-disable-line max-len
+
+export default function isDataURI(str) {
+  assertString(str);
+  return dataURI.test(str);
+}

test/validators.js

@@ -2945,4 +2945,35 @@ describe('Validators', function () {
       assert.throws(validator.isNull.bind(null, item));
     });
   });
+
+  it('should validate dataURI', function () {
+    /* eslint-disable max-len */
+    test({
+      validator: 'isDataURI',
+      valid: [
+        'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAQMAAAAlPW0iAAAABlBMVEUAAAD///+l2Z/dAAAAM0lEQVR4nGP4/5/h/1+G/58ZDrAz3D/McH8yw83NDDeNGe4Ug9C9zwz3gVLMDA/A6P9/AFGGFyjOXZtQAAAAAElFTkSuQmCC',
+        'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAIBAMAAAA2IaO4AAAAFVBMVEXk5OTn5+ft7e319fX29vb5+fn///++GUmVAAAALUlEQVQIHWNICnYLZnALTgpmMGYIFWYIZTA2ZFAzTTFlSDFVMwVyQhmAwsYMAKDaBy0axX/iAAAAAElFTkSuQmCC',
+        '   data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAIBAMAAAA2IaO4AAAAFVBMVEXk5OTn5+ft7e319fX29vb5+fn///++GUmVAAAALUlEQVQIHWNICnYLZnALTgpmMGYIFWYIZTA2ZFAzTTFlSDFVMwVyQhmAwsYMAKDaBy0axX/iAAAAAElFTkSuQmCC   ',
+        'data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22100%22%20height%3D%22100%22%3E%3Crect%20fill%3D%22%2300B1FF%22%20width%3D%22100%22%20height%3D%22100%22%2F%3E%3C%2Fsvg%3E',
+        'data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMDAiIGhlaWdodD0iMTAwIj48cmVjdCBmaWxsPSIjMDBCMUZGIiB3aWR0aD0iMTAwIiBoZWlnaHQ9IjEwMCIvPjwvc3ZnPg==',
+        ' data:,Hello%2C%20World!',
+        ' data:,Hello World!',
+        ' data:text/plain;base64,SGVsbG8sIFdvcmxkIQ%3D%3D',
+        ' data:text/html,%3Ch1%3EHello%2C%20World!%3C%2Fh1%3E',
+        'data:,A%20brief%20note',
+        'data:text/html;charset=US-ASCII,%3Ch1%3EHello!%3C%2Fh1%3E',
+      ],
+      invalid: [
+        'dataxbase64',
+        'data:HelloWorld',
+        'data:text/html;charset=,%3Ch1%3EHello!%3C%2Fh1%3E',
+        'data:text/html;charset,%3Ch1%3EHello!%3C%2Fh1%3E', 'data:base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAQMAAAAlPW0iAAAABlBMVEUAAAD///+l2Z/dAAAAM0lEQVR4nGP4/5/h/1+G/58ZDrAz3D/McH8yw83NDDeNGe4Ug9C9zwz3gVLMDA/A6P9/AFGGFyjOXZtQAAAAAElFTkSuQmCC',
+        '',
+        'http://wikipedia.org',
+        'base64',
+        'iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAQMAAAAlPW0iAAAABlBMVEUAAAD///+l2Z/dAAAAM0lEQVR4nGP4/5/h/1+G/58ZDrAz3D/McH8yw83NDDeNGe4Ug9C9zwz3gVLMDA/A6P9/AFGGFyjOXZtQAAAAAElFTkSuQmCC',
+      ],
+    });
+    /* eslint-enable max-len */
+  });
 });