Neatly Punctuated Musings

    robots-parser
    TypeScript icon, indicating that this package has built-in type declarations

    3.0.0 • Public • Published

    Robots Parser NPM downloads DeepScan grade GitHub license Coverage Status

    A robots.txt parser which aims to be complaint with the draft specification.

    The parser currently supports:

    • User-agent:
    • Allow:
    • Disallow:
    • Sitemap:
    • Crawl-delay:
    • Host:
    • Paths with wildcards (*) and EOL matching ($)

    Installation

    Via NPM:

    npm install robots-parser
    

    or via Yarn:

    yarn add robots-parser
    

    Usage

    var robotsParser = require('robots-parser');
    
    var robots = robotsParser('http://www.example.com/robots.txt', [
    	'User-agent: *',
    	'Disallow: /dir/',
    	'Disallow: /test.html',
    	'Allow: /dir/test.html',
    	'Allow: /test.html',
    	'Crawl-delay: 1',
    	'Sitemap: http://example.com/sitemap.xml',
    	'Host: example.com'
    ].join('\n'));
    
    robots.isAllowed('http://www.example.com/test.html', 'Sams-Bot/1.0'); // true
    robots.isAllowed('http://www.example.com/dir/test.html', 'Sams-Bot/1.0'); // true
    robots.isDisallowed('http://www.example.com/dir/test2.html', 'Sams-Bot/1.0'); // true
    robots.getCrawlDelay('Sams-Bot/1.0'); // 1
    robots.getSitemaps(); // ['http://example.com/sitemap.xml']
    robots.getPreferredHost(); // example.com

    isAllowed(url, [ua])

    boolean or undefined

    Returns true if crawling the specified URL is allowed for the specified user-agent.

    This will return undefined if the URL isn't valid for this robots.txt.

    isDisallowed(url, [ua])

    boolean or undefined

    Returns true if crawling the specified URL is not allowed for the specified user-agent.

    This will return undefined if the URL isn't valid for this robots.txt.

    getMatchingLineNumber(url, [ua])

    number or undefined

    Returns the line number of the matching directive for the specified URL and user-agent if any.

    Line numbers start at 1 and go up (1-based indexing).

    Returns -1 if there is no matching directive. If a rule is manually added without a lineNumber then this will return undefined for that rule.

    getCrawlDelay([ua])

    number or undefined

    Returns the number of seconds the specified user-agent should wait between requests.

    Returns undefined if no crawl delay has been specified for this user-agent.

    getSitemaps()

    array

    Returns an array of sitemap URLs specified by the sitemap: directive.

    getPreferredHost()

    string or null

    Returns the preferred host name specified by the host: directive or null if there isn't one.

    Changes

    Version 3.0.0

    • Changed to using global URL object instead of importing. – Thanks to @brendankenny

    Version 2.4.0:

    • Added Typescript definitions
      – Thanks to @danhab99 for creating
    • Added SECURITY.md policy and CodeQL scanning

    Version 2.3.0:

    • Fixed bug where if the user-agent passed to isAllowed() / isDisallowed() is called "constructor" it would throw an error.

    • Added support for relative URLs. This does not affect the default behavior so can safely be upgraded.

      Relative matching is only allowed if both the robots.txt URL and the URLs being checked are relative.

      For example:

      var robots = robotsParser('/robots.txt', [
          'User-agent: *',
          'Disallow: /dir/',
          'Disallow: /test.html',
          'Allow: /dir/test.html',
          'Allow: /test.html'
      ].join('\n'));
      
      robots.isAllowed('/test.html', 'Sams-Bot/1.0'); // false
      robots.isAllowed('/dir/test.html', 'Sams-Bot/1.0'); // true
      robots.isDisallowed('/dir/test2.html', 'Sams-Bot/1.0'); // true

    Version 2.2.0:

    • Fixed bug that with matching wildcard patterns with some URLs – Thanks to @ckylape for reporting and fixing
    • Changed matching algorithm to match Google's implementation in google/robotstxt
    • Changed order of precedence to match current spec

    Version 2.1.1:

    • Fix bug that could be used to causing rule checking to take a long time – Thanks to @andeanfog

    Version 2.1.0:

    • Removed use of punycode module API's as new URL API handles it
    • Improved test coverage
    • Added tests for percent encoded paths and improved support
    • Added getMatchingLineNumber() method
    • Fixed bug with comments on same line as directive

    Version 2.0.0:

    This release is not 100% backwards compatible as it now uses the new URL APIs which are not supported in Node < 7.

    • Update code to not use deprecated URL module API's. – Thanks to @kdzwinel

    Version 1.0.2:

    • Fixed error caused by invalid URLs missing the protocol.

    Version 1.0.1:

    • Fixed bug with the "user-agent" rule being treated as case sensitive. – Thanks to @brendonboshell
    • Improved test coverage. – Thanks to @schornio

    Version 1.0.0:

    • Initial release.

    License

    The MIT License (MIT)
    
    Copyright (c) 2014 Sam Clarke
    
    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 robots-parser

    DownloadsWeekly Downloads

    665,833

    Version

    3.0.0

    License

    MIT

    Unpacked Size

    43.5 kB

    Total Files

    10

    Last publish

    Collaborators

    • samclarke