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    valid-data-url
    DefinitelyTyped icon, indicating that this package has TypeScript declarations provided by the separate @types/valid-data-url package

    3.0.1 • Public • Published

    Detect if a string is a data URL

    Build Status Coverage Status Dependency Status Dev Dependency Status npm npm

    Based on Brian Grinstead's solution https://gist.github.com/bgrins/6194623. Special thanks to Jamie Davis for helping to fix ReDoS exploit.

    Syntax

    The "data" URL scheme is described here RFC2397

    dataurl    := "data:" [ mediatype ] [ ";base64" ] "," data
    mediatype  := [ type "/" subtype ] *( ";" parameter )
    data       := *urlchar
    parameter  := attribute "=" value
    

    where urlchar is imported from RFC2396, and type, subtype, attribute and value are the corresponding tokens from RFC2045, represented using URL escaped encoding of RFC2396 as necessary.

    Attribute values in RFC2045 are allowed to be either represented as tokens or as quoted strings. However, within a data URL, the quoted-string representation would be awkward, since the quote mark is itself not a valid urlchar. For this reason, parameter values should use the URL Escaped encoding instead of quoted string if the parameter values contain any tspecial.

    The ;base64 extension is distinguishable from a content-type parameter by the fact that it doesn't have a following = sign.

    Install

    npm install valid-data-url
    
    

    Example

    'use strict';
     
    var validDataUrl = require('valid-data-url');
    var isValid = validDataUrl('data:text/plain;base64,SGVsbG8sIFdvcmxkIQ%3D%3D'); // true
     

    People

    The original author is Brian Grinstead

    Contributors

    Licence

    The MIT License (MIT)

    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.
    

    Install

    npm i valid-data-url

    DownloadsWeekly Downloads

    360,777

    Version

    3.0.1

    License

    MIT

    Unpacked Size

    8.32 kB

    Total Files

    5

    Last publish

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