SitemapGenerator

SitemapGenerator is the easiest way to generate Sitemaps in Ruby. Rails integration provides access to the Rails route helpers within your sitemap config file and automatically makes the rake tasks available to you. Or if you prefer to use another framework, you can! You can use the rake tasks provided or run your sitemap configs as plain ruby scripts.

Sitemaps adhere to the Sitemap 0.9 protocol specification.

• Framework agnostic
• Supports News sitemaps, Video sitemaps, Image sitemaps, Mobile sitemaps, PageMap sitemaps and Alternate Links
• Supports read-only filesystems like Heroku via uploading to a remote host like Amazon S3
• Compatible with all versions of Rails and Ruby
• Adheres to the Sitemap 0.9 protocol
• Handles millions of links
• Customizable sitemap compression
• Notifies search engines (Google) of new sitemaps
• Ensures your old sitemaps stay in place if the new sitemap fails to generate
• Gives you complete control over your sitemap contents and naming scheme
• Intelligent sitemap indexing

This is a simple standalone example. For Rails installation see the Rails instructions in the Install section.

Install:

gem install sitemap_generator

Create sitemap.rb:

require 'rubygems'
require 'sitemap_generator'

SitemapGenerator::Sitemap.default_host = 'http://example.com'
SitemapGenerator::Sitemap.create do
  add '/home', :changefreq => 'daily', :priority => 0.9
  add '/contact_us', :changefreq => 'weekly'
end
SitemapGenerator::Sitemap.ping_search_engines # Not needed if you use the rake tasks

Run it:

ruby sitemap.rb

Output:

In /Users/karl/projects/sitemap_generator-test/public/
+ sitemap.xml.gz                                           3 links /  364 Bytes
Sitemap stats: 3 links / 1 sitemaps / 0m00s

Successful ping of Google

• SitemapGenerator
  • Features
    • Show Me
  • Contents
  • Contribute
  • Foreword
  • Installation
    • Ruby
    • Rails
  • Getting Started
    • Preventing Output
    • Rake Tasks
    • Pinging Search Engines
    • Crontab
    • Robots.txt
    • Ruby Modules
    • Deployments & Capistrano
    • Sitemaps with no Index File
    • Upload Sitemaps to a Remote Host using Adapters
      • Supported Adapters
        • SitemapGenerator::FileAdapter
        • SitemapGenerator::FogAdapter
        • SitemapGenerator::S3Adapter
        • SitemapGenerator::AwsSdkAdapter
        • SitemapGenerator::WaveAdapter
        • SitemapGenerator::GoogleStorageAdapter
      • An Example of Using an Adapter
    • Generating Multiple Sitemaps
  • Sitemap Configuration
    • A Simple Example
    • Adding Links
    • Supported Options to add
    • Adding Links to the Sitemap Index
    • Accessing the LinkSet instance
    • Speeding Things Up
  • Customizing your Sitemaps
    • Sitemap Options
  • Sitemap Groups
    • A Groups Example
    • Using group without a block
  • Sitemap Extensions
    • News Sitemaps
      • Example
      • Supported options
    • Image Sitemaps
      • Example
      • Supported options
    • Video Sitemaps
      • Example
      • Supported options
    • PageMap Sitemaps
      • Supported options
      • Example:
    • Alternate Links
      • Example
      • Supported options
      • Alternates Example
    • Mobile Sitemaps
      • Example
      • Supported options
  • Compatibility
  • Licence

Does your website use SitemapGenerator to generate Sitemaps? Where would you be without Sitemaps? Probably still knocking rocks together. Consider donating to the project to keep it up-to-date and open source.

Adam Salter first created SitemapGenerator while we were working together in Sydney, Australia. Unfortunately, he passed away in 2009. Since then I have taken over development of SitemapGenerator.

Those who knew him know what an amazing guy he was, and what an excellent Rails programmer he was. His passing is a great loss to the Rails community.

The canonical repository is: http://github.com/kjvarga/sitemap_generator

gem install 'sitemap_generator'

To use the rake tasks add the following to your Rakefile:

require 'sitemap_generator/tasks'

The Rake tasks expect your sitemap to be at config/sitemap.rb but if you need to change that call like so: rake sitemap:refresh CONFIG_FILE="path/to/sitemap.rb"

SitemapGenerator works with all versions of Rails and has been tested in Rails 2, 3 and 4.

Add the gem to your Gemfile:

gem 'sitemap_generator'

Alternatively, if you are not using a Gemfile add the gem to your config/application.rb file config block:

config.gem 'sitemap_generator'

Note: SitemapGenerator automatically loads its Rake tasks when used with Rails. You do not need to require the sitemap_generator/tasks file.

To disable all non-essential output you can pass the -s option to Rake, for example rake -s sitemap:refresh, or set the environment variable VERBOSE=false when calling as a Ruby script.

To disable output in-code use the following:

SitemapGenerator.verbose = false

• rake sitemap:install will create a config/sitemap.rb file which is your sitemap configuration and contains everything needed to build your sitemap. See Sitemap Configuration below for more information about how to define your sitemap.

• rake sitemap:refresh will create or rebuild your sitemap files as needed. Sitemaps are generated into the public/ folder and by default are named sitemap.xml.gz, sitemap1.xml.gz, sitemap2.xml.gz, etc. As you can see, they are automatically GZip compressed for you. In this case, sitemap.xml.gz is your sitemap "index" file.

  rake sitemap:refresh will output information about each sitemap that is written including its location, how many links it contains, and the size of the file.

Using rake sitemap:refresh will notify configured search engines to let them know that a new sitemap is available. To generate new sitemaps without notifying search engines, use rake sitemap:refresh:no_ping.

By default no search engines are configured. If you want to customize the hash of search engines you can access it at:

SitemapGenerator::Sitemap.search_engines

Usually you would be adding a new search engine to ping. In this case you can modify the search_engines hash directly. This ensures that when SitemapGenerator::Sitemap.ping_search_engines is called, your new search engine will be included.

If you are calling ping_search_engines manually, then you can pass your new search engine directly in the call, as in the following example:

SitemapGenerator::Sitemap.ping_search_engines(newengine: 'http://newengine.com/ping?url=%s')

The key gives the name of the search engine, as a string or symbol, and the value is the full URL to ping, with a string interpolation that will be replaced by the CGI escaped sitemap index URL. If you have any literal percent characters in your URL you need to escape them with %%.

If you are calling SitemapGenerator::Sitemap.ping_search_engines from outside of your sitemap config file, then you will need to set SitemapGenerator::Sitemap.default_host and any other options that you set in your sitemap config which affect the location of the sitemap index file. For example:

SitemapGenerator::Sitemap.default_host = 'http://example.com'
SitemapGenerator::Sitemap.ping_search_engines

Alternatively, you can pass in the full URL to your sitemap index, in which case we would have just the following:

SitemapGenerator::Sitemap.ping_search_engines('http://example.com/sitemap.xml.gz')

To keep your sitemaps up-to-date, setup a cron job. Make sure to pass the -s option to silence rake. That way you will only get email if the sitemap build fails.

If you're using Whenever, your schedule would look something like this:

# config/schedule.rb
every 1.day, :at => '5:00 am' do
  rake "-s sitemap:refresh"
end

You should add the URL of the sitemap index file to public/robots.txt to help search engines find your sitemaps. The URL should be the complete URL to the sitemap index. For example:

Sitemap: http://www.example.com/sitemap.xml.gz

If you need to include a module (e.g. a rails helper), you must include it in the sitemap interpreter class. The part of your sitemap configuration that defines your sitemaps is run within an instance of the SitemapGenerator::Interpreter:

SitemapGenerator::Interpreter.send :include, RoutingHelper

To include the capistrano tasks just add the following to your Capfile:

require 'capistrano/sitemap_generator'

Configurable options:

set :sitemap_roles, :web # default

Available capistrano tasks:

sitemap:create   #Create sitemaps without pinging search engines
sitemap:refresh  #Create sitemaps and ping search engines
sitemap:clean    #Clean up sitemaps in the sitemap path

Generate sitemaps into a directory which is shared by all deployments.

You can set your sitemaps path to your shared directory using the sitemaps_path option. For example if we have a directory public/shared/ that is shared by all deployments we can have our sitemaps generated into that directory by setting:

SitemapGenerator::Sitemap.sitemaps_path = 'shared/'

The sitemap index file is created for you on-demand, meaning that if you have a large site with more than one sitemap file, you will have a sitemap index file to reference those sitemap files. If however you have a small site with only one sitemap file, you don't require an index and so no index will be created. In both cases the index and sitemap file's name, respectively, is sitemap.xml.gz.

You may want to always create an index, even if you only have a small site. Or you may never want to create an index. For these cases, you can use the create_index option to control index creation. You can read about this option in the Sitemap Options section below.

To always create an index:

SitemapGenerator::Sitemap.create_index = true

To never create an index:

SitemapGenerator::Sitemap.create_index = false

Your sitemaps will still be called sitemap.xml.gz, sitemap1.xml.gz, sitemap2.xml.gz, etc.

And the default "intelligent" behaviour:

SitemapGenerator::Sitemap.create_index = :auto

This section needs better documentation. Please consider contributing.

Sometimes it is desirable to host your sitemap files on a remote server, and point robots and search engines to the remote files. For example, if you are using a host like Heroku, which doesn't allow writing to the local filesystem. You still require some write access, because the sitemap files need to be written out before uploading. So generally a host will give you write access to a temporary directory. On Heroku this is tmp/ within your application directory.

Standard adapter, writes out to a file.

Uses Fog::Storage to upload to any service supported by Fog.

You must require 'fog' in your sitemap config before using this adapter, or require another library that defines Fog::Storage.

Uses Fog::Storage to upload to Amazon S3 storage.

You must require 'fog-aws' in your sitemap config before using this adapter.

An example of using this adapter in your sitemap configuration:

SitemapGenerator::Sitemap.adapter = SitemapGenerator::S3Adapter.new(options)

Where options is a Hash with any of the following keys:

• aws_access_key_id [String] Your AWS access key id
• aws_secret_access_key [String] Your AWS secret access key
• fog_provider [String]
• fog_directory [String]
• fog_region [String]
• fog_path_style [String]
• fog_storage_options [Hash] Other options to pass to Fog::Storage
• fog_public [Boolean] Whether the file is publicly accessible

Alternatively you can use an environment variable to configure each option (except fog_storage_options). The environment variables have the same name but capitalized, e.g. FOG_PATH_STYLE.

Uses Aws::S3::Resource to upload to Amazon S3 storage. Includes automatic detection of your AWS credentials and region.

You must require 'aws-sdk-s3' in your sitemap config before using this adapter, or require another library that defines Aws::S3::Resource and Aws::Credentials.

An example of using this adapter in your sitemap configuration:

SitemapGenerator::Sitemap.adapter = SitemapGenerator::AwsSdkAdapter.new('s3_bucket',
  acl: 'public-read', # Optional. This is the default.
  cache_control: 'private, max-age=0, no-cache', # Optional. This is the default.
  access_key_id: 'AKIAI3SW5CRAZBL4WSTA',
  secret_access_key: 'asdfadsfdsafsadf',
  region: 'us-east-1',
  endpoint: 'https://sfo2.digitaloceanspaces.com'
)

Where the first argument is the S3 bucket name, and the rest are keyword argument options. Options :acl and :cache_control configure access and caching of the uploaded files; all other options are passed directly to the AWS client.

See the SitemapGenerator::AwsSdkAdapter docs, and https://docs.aws.amazon.com/sdk-for-ruby/v2/api/Aws/S3/Client.html#initialize-instance_method for the full list of supported options.

Uses CarrierWave::Uploader::Base to upload to any service supported by CarrierWave, for example, Amazon S3, Rackspace Cloud Files, and MongoDB's GridF.

You must require 'carrierwave' in your sitemap config before using this adapter, or require another library that defines CarrierWave::Uploader::Base.

Some documentation exists on the wiki page.

Uses Google::Cloud::Storage to upload to Google Cloud storage.

You must require 'google/cloud/storage' in your sitemap config before using this adapter.

An example of using this adapter in your sitemap configuration with options:

SitemapGenerator::Sitemap.adapter = SitemapGenerator::GoogleStorageAdapter.new(
  acl: 'public', # Optional.  This is the default value.
  bucket: 'name_of_bucket'
  credentials: 'path/to/keyfile.json',
  project_id: 'google_account_project_id',
)

Also, inline with Google Authentication options, it can also pick credentials from environment variables. All supported environment variables can be used, for example: GOOGLE_CLOUD_PROJECT and GOOGLE_CLOUD_CREDENTIALS. An example of using this adapter with the environment variables is:

SitemapGenerator::Sitemap.adapter = SitemapGenerator::GoogleStorageAdapter.new(
  bucket: 'name_of_bucket'
)

All options other than the :bucket and :acl options are passed to the Google::Cloud::Storage.new initializer giving you maximum configurability. See the Google Cloud Storage initializer for supported options.

1. Please see this wiki page for more information about setting up SitemapGenerator to upload to a remote host.

2. This example uses the CarrierWave adapter. It shows some common settings that are used when the hostname hosting the sitemaps differs from the hostname of the sitemap links.

   # Your website's host name
   SitemapGenerator::Sitemap.default_host = "http://www.example.com"
   
   # The remote host where your sitemaps will be hosted
   SitemapGenerator::Sitemap.sitemaps_host = "http://s3.amazonaws.com/sitemap-generator/"
   
   # The directory to write sitemaps to locally
   SitemapGenerator::Sitemap.public_path = 'tmp/'
   
   # Set this to a directory/path if you don't want to upload to the root of your `sitemaps_host`
   SitemapGenerator::Sitemap.sitemaps_path = 'sitemaps/'
   
   # The adapter to perform the upload of sitemap files.
   SitemapGenerator::Sitemap.adapter = SitemapGenerator::WaveAdapter.new

3. Update your robots.txt file to point robots to the remote sitemap index file, e.g:

   Sitemap: http://s3.amazonaws.com/sitemap-generator/sitemaps/sitemap.xml.gz
   

   You generate your sitemaps as usual using rake sitemap:refresh.

   Note that SitemapGenerator will automatically turn off include_index in this case because the sitemaps_host does not match the default_host. The link to the sitemap index file that would otherwise be included would point to a different host than the rest of the links in the sitemap, something that the sitemap rules forbid.

4. Verify to Google that you own the S3 url

   In order for Google to use your sitemap, you need to prove you own the S3 bucket through google webmaster tools. In the example above, you would add the site http://s3.amazonaws.com/sitemap-generator/sitemaps. Once you have verified you own the directory, then add your sitemap index to the list of sitemaps for the site.

Each call to create creates a new sitemap index and associated sitemaps. You can call create as many times as you want within your sitemap configuration.

You must remember to use a different filename or location for each set of sitemaps, otherwise they will overwrite each other. You can use the filename, namer and sitemaps_path options for this.

In the following example we generate three sitemaps each in its own subdirectory:

%w(google bing apple).each do |subdomain|
  SitemapGenerator::Sitemap.default_host = "https://#{subdomain}.mysite.com"
  SitemapGenerator::Sitemap.sitemaps_path = "sitemaps/#{subdomain}"
  SitemapGenerator::Sitemap.create do
    add '/home'
  end
end

Outputs:

+ sitemaps/google/sitemap1.xml.gz             2 links /  822 Bytes /  328 Bytes gzipped
+ sitemaps/google/sitemap.xml.gz           1 sitemaps /  389 Bytes /  217 Bytes gzipped
Sitemap stats: 2 links / 1 sitemaps / 0m00s
+ sitemaps/bing/sitemap1.xml.gz               2 links /  820 Bytes /  330 Bytes gzipped
+ sitemaps/bing/sitemap.xml.gz             1 sitemaps /  388 Bytes /  217 Bytes gzipped
Sitemap stats: 2 links / 1 sitemaps / 0m00s
+ sitemaps/apple/sitemap1.xml.gz              2 links /  820 Bytes /  330 Bytes gzipped
+ sitemaps/apple/sitemap.xml.gz            1 sitemaps /  388 Bytes /  214 Bytes gzipped
Sitemap stats: 2 links / 1 sitemaps / 0m00s

If you don't want to have to generate all the sitemaps at once, or you want to refresh some more often than others, you can split them up into their own configuration files. Using the above example we would have:

# config/google_sitemap.rb
SitemapGenerator::Sitemap.default_host = "https://google.mysite.com"
SitemapGenerator::Sitemap.sitemaps_path = "sitemaps/google"
SitemapGenerator::Sitemap.create do
  add '/home'
end

# config/apple_sitemap.rb
SitemapGenerator::Sitemap.default_host = "https://apple.mysite.com"
SitemapGenerator::Sitemap.sitemaps_path = "sitemaps/apple"
SitemapGenerator::Sitemap.create do
  add '/home'
end

# config/bing_sitemap.rb
SitemapGenerator::Sitemap.default_host = "https://bing.mysite.com"
SitemapGenerator::Sitemap.sitemaps_path = "sitemaps/bing"
SitemapGenerator::Sitemap.create do
  add '/home'
end

To generate each one specify the configuration file to run by passing the CONFIG_FILE option to rake sitemap:refresh, e.g.:

rake sitemap:refresh CONFIG_FILE="config/google_sitemap.rb"
rake sitemap:refresh CONFIG_FILE="config/apple_sitemap.rb"
rake sitemap:refresh CONFIG_FILE="config/bing_sitemap.rb"

A sitemap configuration file contains all the information needed to generate your sitemaps. By default SitemapGenerator looks for a configuration file in config/sitemap.rb - relative to your application root or the current working directory. (Run rake sitemap:install to have this file generated for you if you have not done so already.)

If you want to use a non-standard configuration file, or have multiple configuration files, you can specify which one to run by passing the CONFIG_FILE option like so:

rake sitemap:refresh CONFIG_FILE="config/geo_sitemap.rb"

So what does a sitemap configuration look like? Let's take a look at a simple example:

SitemapGenerator::Sitemap.default_host = "http://www.example.com"
SitemapGenerator::Sitemap.create do
  add '/welcome'
end

A few things to note:

• SitemapGenerator::Sitemap is a lazy-initialized sitemap object provided for your convenience.
• Every sitemap must set default_host. This is the hostname that is used when building links to add to the sitemap (and all links in a sitemap must belong to the same host).
• The create method takes a block with calls to add to add links to the sitemap.
• The sitemaps are written to the public/ directory in the directory from which the script is run. You can specify a custom location using the public_path or sitemaps_path option.

Now let's see what is output when we run this configuration with rake sitemap:refresh:no_ping:

In /Users/karl/projects/sitemap_generator-test/public/
+ sitemap.xml.gz                                           2 links /  347 Bytes
Sitemap stats: 2 links / 1 sitemaps / 0m00s

Weird! The sitemap has two links, even though we only added one! This is because SitemapGenerator adds the root URL / for you by default. You can change the default behaviour by setting the include_root or include_index option.

Now let's take a look at the file that was created. After uncompressing and XML-tidying the contents we have:

• public/sitemap.xml.gz

<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:image="http://www.google.com/schemas/sitemap-image/1.1" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:video="http://www.google.com/schemas/sitemap-video/1.1" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">
  <url>
    <loc>http://www.example.com/</loc>
    <lastmod>2011-05-21T00:03:38+00:00</lastmod>
    <changefreq>weekly</changefreq>
    <priority>1.0</priority>
  </url>
  <url>
    <loc>http://www.example.com/welcome</loc>
    <lastmod>2011-05-21T00:03:38+00:00</lastmod>
    <changefreq>weekly</changefreq>
    <priority>0.5</priority>
  </url>
</urlset>

The sitemaps conform to the Sitemap 0.9 protocol. Notice the value for priority and changefreq on the root link, the one that was added for us? The values tell us that this link is the highest priority and should be checked regularly because it are constantly changing. You can specify your own values for these options in your call to add.

In this example no sitemap index was created because we have so few links, so none was needed. If we run the same example above and set create_index = true we can take a look at what an index file looks like:

SitemapGenerator::Sitemap.default_host = "http://www.example.com"
SitemapGenerator::Sitemap.create_index = true
SitemapGenerator::Sitemap.create do
  add '/welcome'
end

And the output:

In /Users/karl/projects/sitemap_generator-test/public/
+ sitemap1.xml.gz                                          2 links /  347 Bytes
+ sitemap.xml.gz                                        1 sitemaps /  228 Bytes
Sitemap stats: 2 links / 1 sitemaps / 0m00s

Now if we look at the uncompressed and formatted contents of sitemap.xml.gz we can see that it is a sitemap index and sitemap1.xml.gz is a sitemap:

• public/sitemap.xml.gz

<?xml version="1.0" encoding="UTF-8"?>
<sitemapindex xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/siteindex.xsd">
  <sitemap>
    <loc>http://www.example.com/sitemap1.xml.gz</loc>
    <lastmod>2013-05-01T18:10:26-07:00</lastmod>
  </sitemap>
</sitemapindex>

You call add in the block passed to create to add a path to your sitemap. add takes a string path and optional hash of options, generates the URL and adds it to the sitemap. You only need to pass a path because the URL will be built for us using the default_host we specified. However, if we want to use a different host for a particular link, we can pass the :host option to add.

Let's see another example:

SitemapGenerator::Sitemap.default_host = "http://www.example.com"
SitemapGenerator::Sitemap.create do
  add '/contact_us'
  Content.find_each do |content|
    add content_path(content), :lastmod => content.updated_at
  end
end

In this example first we add the /contact_us page to the sitemap and then we iterate through the Content model's records adding each one to the sitemap using the content_path helper method to generate the path for each record.

The Rails URL/path helper methods are automatically made available to us in the create block. This keeps the logic for building our paths out of the sitemap config and in the Rails application where it should be. You use those methods just like you would in your application's view files.

In the example about we pass a lastmod (last modified) option with the value of the record's updated_at attribute so that search engines know to only re-index the page when the record changes.

Looking at the output from running this sitemap, we see that we have a few more links than before:

+ sitemap.xml.gz                   12 links /     2.3 KB /  365 Bytes gzipped
Sitemap stats: 12 links / 1 sitemaps / 0m00s

From this example we can see that:

• The create block can contain Ruby code
• The Rails URL/path helper methods are made available to us, and
• The basic syntax for adding paths to the sitemap using add

You can read more about add in the XML Specification.

For other options be sure to check out the Sitemap Extensions section below.

• changefreq - Default: 'weekly' (String).

  Indicates how often the content of the page changes. One of 'always', 'hourly', 'daily', 'weekly', 'monthly', 'yearly' or 'never'. Example:

add '/contact_us', :changefreq => 'monthly'

• lastmod - Default: Time.now (Integer, Time, Date, DateTime, String).

  The date and time of last modification. Example:

add content_path(content), :lastmod => content.updated_at

• host - Default: default_host (String).

  Host to use when building the URL. It's not technically valid to specify a different host for a link in a sitemap according to the spec, but this facility exists in case you have a need. Example:

add '/login', :host => 'https://securehost.com'

• priority - Default: 0.5 (Float).

  The priority of the URL relative to other URLs on a scale from 0 to 1. Example:

add '/about', :priority => 0.75

• expires - Optional (Integer, Time, Date, DateTime, String)

  Request removal of this URL from search engines' indexes. Example (uses ActiveSupport):

add '/about', :expires => Time.now + 2.weeks

Sometimes you may need to manually add some links to the sitemap index file. For example if you are generating your sitemaps incrementally you may want to create a sitemap index which includes the files which have already been generated. To achieve this you can use the add_to_index method which works exactly the same as the add method described above.

It supports the same options as add, namely:

• changefreq

• lastmod

• host

  The value for host defaults to whatever you have set as your sitemaps_host. Remember that the sitemaps_host is the host where your sitemaps reside. If your sitemaps are on the same host as your default_host, then the value for default_host is used. Example:

add_to_index '/mysitemap1.xml.gz', :host => 'http://sitemaphostingserver.com'

• priority

An example:

SitemapGenerator::Sitemap.default_host = "http://www.example.com"
SitemapGenerator::Sitemap.create do
  add_to_index '/mysitemap1.xml.gz'
  add_to_index '/mysitemap2.xml.gz'
  # ...
end

When you add links in this way, an index is always created, unless you've explicitly set create_index to false.

Sometimes you need to mess with the internals to do custom stuff. If you need access to the LinkSet instance from within create() you can use the sitemap method to do so.

In this example, say we have already pre-generated three sitemap files: sitemap1.xml.gz, sitemap2.xml.gz, sitemap3.xml.gz. Now we want to start the sitemap generation at sitemap4.xml.gz and create a bunch of new sitemaps. There are a few ways we can do this, but this is an easy way:

SitemapGenerator::Sitemap.default_host = "http://www.example.com"
SitemapGenerator::Sitemap.namer = SitemapGenerator::SimpleNamer.new(:sitemap, :start => 4)
SitemapGenerator::Sitemap.create do
  (1..3).each do |i|
    add_to_index "sitemap#{i}.xml.gz"
  end
  add '/home'
  add '/another'
end

The output looks something like this:

In /Users/karl/projects/sitemap_generator-test/public/
+ sitemap4.xml.gz                                          3 links /  355 Bytes
+ sitemap.xml.gz                                        4 sitemaps /  242 Bytes
Sitemap stats: 3 links / 4 sitemaps / 0m00s

For large ActiveRecord collections with thousands of records it is advisable to iterate through them in batches to avoid loading all records into memory at once. For this reason in the example above we use Content.find_each which is a batched iterator available since Rails 2.3.2, rather than Content.all.

SitemapGenerator supports a number of options which allow you to control every aspect of your sitemap generation. How they are named, where they are stored, the contents of the links and the location that the sitemaps will be hosted from can all be set.

The options can be set in the following ways.

On SitemapGenerator::Sitemap:

SitemapGenerator::Sitemap.default_host = 'http://example.com'
SitemapGenerator::Sitemap.sitemaps_path = 'sitemaps/'

These options will apply to all sitemaps. This is how you set most options.

Passed as options in the call to create:

SitemapGenerator::Sitemap.create(
    :default_host => 'http://example.com',
    :sitemaps_path => 'sitemaps/') do
  add '/home'
end

This is useful if you are setting a lot of options.

Finally, passed as options in a call to group:

SitemapGenerator::Sitemap.create(:default_host => 'http://example.com') do
  group(:filename => :somegroup, :sitemaps_path => 'sitemaps/') do
    add '/home'
  end
end

The options passed to group only apply to the links and sitemaps generated in the group. Sitemap Groups are useful to group links into specific sitemaps, or to set options that you only want to apply to the links in that group.

The following options are supported.

• :create_index - Supported values: true, false, :auto. Default: :auto. Whether to create a sitemap index file. If true an index file is always created regardless of how many sitemap files are generated. If false an index file is never created. If :auto an index file is created only when you have more than one sitemap file (i.e. you have added more than 50,000 - SitemapGenerator::MAX_SITEMAP_LINKS - links).

• :default_host - String. Required. Host including protocol to use when building a link to add to your sitemap. For example http://example.com. Calling add '/home' would then generate the URL http://example.com/home and add that to the sitemap. You can pass a :host option in your call to add to override this value on a per-link basis. For example calling add '/home', :host => 'https://example.com' would generate the URL https://example.com/home, for that link only.

• :filename - Symbol. The base name for the files that will be generated. The default value is :sitemap. This yields files with names like sitemap.xml.gz, sitemap1.xml.gz, sitemap2.xml.gz, sitemap3.xml.gz etc. If we now set the value to :geo the files would be named geo.xml.gz, geo1.xml.gz, geo2.xml.gz, geo3.xml.gz etc.

• :include_index - Boolean. Whether to add a link pointing to the sitemap index to the current sitemap. This points search engines to your Sitemap Index to include it in the indexing of your site. 2012-07: This is now turned off by default because Google may complain about there being 'Nested Sitemap indexes'. Default is false. Turned off when sitemaps_host is set or within a group() block.

• :include_root - Boolean. Whether to add the root url i.e. '/' to the current sitemap. Default is true. Turned off within a group() block.

• :public_path - String. A full or relative path to the public directory or the directory you want to write sitemaps into. Defaults to public/ under your application root or relative to the current working directory.

• :sitemaps_host - String. Host including protocol to use when generating a link to a sitemap file i.e. the hostname of the server where the sitemaps are hosted. The value will differ from the hostname in your sitemap links. For example: 'http://amazon.aws.com/'. Note that include_index is automatically turned off when the sitemaps_host does not match default_host. Because the link to the sitemap index file that would otherwise be added would point to a different host than the rest of the links in the sitemap. Something that the sitemap rules forbid.

• :namer - A SitemapGenerator::SimpleNamer instance for generating sitemap names. You can read about Sitemap Namers by reading the API docs. Allows you to set the name, extension and number sequence for sitemap files, as well as modify the name of the first file in the sequence, which is often the index file. A simple example if we want to generate files like 'newname.xml.gz', 'newname1.xml.gz', etc is SitemapGenerator::SimpleNamer.new(:newname).

• :sitemaps_path - String. A relative path giving a directory under your public_path at which to write sitemaps. The difference between the two options is that the sitemaps_path is used when generating a link to a sitemap file. For example, if we set SitemapGenerator::Sitemap.sitemaps_path = 'en/' and use the default public_path sitemaps will be written to public/en/. The URL to the sitemap index would then be http://example.com/en/sitemap.xml.gz.

• :verbose - Boolean. Whether to output a sitemap summary describing the sitemap files and giving statistics about your sitemap. Default is false. When using the Rake tasks verbose will be true unless you pass the -s option.

• :adapter - Instance. The default adapter is a SitemapGenerator::FileAdapter which simply writes files to the filesystem. You can use a SitemapGenerator::WaveAdapter for uploading sitemaps to remote servers - useful for read-only hosts such as Heroku. Or you can provide an instance of your own class to provide custom behavior. Your class must define a write method which takes a SitemapGenerator::Location and raw XML data.

• :compress - Specifies which files to compress with gzip. Default is true. Accepted values:

  • true - Boolean; compress all files.
  • false - Boolean; Do not compress any files.
  • :all_but_first - Symbol; leave the first file uncompressed but compress all remaining files.

  The compression setting applies to groups too. So :all_but_first will have the same effect (the first file in the group will not be compressed, the rest will). So if you require different behaviour for your groups, pass in a :compress option e.g. group(:compress => false) { add('/link') }

• :max_sitemap_links - Integer. The maximum number of links to put in each sitemap. Default is SitemapGenerator::MAX_SITEMAPS_LINKS, or 50,000.

Sitemap Groups is a powerful feature that is also very simple to use.

• All options are supported except for public_path. You cannot change the public path.
• Groups inherit the options set on the default sitemap.
• include_index and include_root are false by default in a group.
• The sitemap index file is shared by all groups.
• Groups can handle any number of links.
• Group sitemaps are finalized (written out) as they get full and at the end of each group.
• It's a good idea to name your groups

When you create a new group you pass options which will apply only to that group. You pass a block to group. Inside your block you call add to add links to the group.

Let's see an example that demonstrates a few interesting things about groups:

SitemapGenerator::Sitemap.default_host = "http://www.example.com"
SitemapGenerator::Sitemap.create do
  add '/rss'

  group(:sitemaps_path => 'en/', :filename => :english) do
    add '/home'
  end

  group(:sitemaps_path => 'fr/', :filename => :french) do
    add '/maison'
  end
end

And the output from running the above:

In /Users/karl/projects/sitemap_generator-test/public/
+ en/english.xml.gz                                        1 links /  328 Bytes
+ fr/french.xml.gz                                         1 links /  329 Bytes
+ sitemap1.xml.gz                                          2 links /  346 Bytes
+ sitemap.xml.gz                                        3 sitemaps /  252 Bytes
Sitemap stats: 4 links / 3 sitemaps / 0m00s

So we have two sitemaps with one link each and one sitemap with two links. The sitemaps from the groups are easy to spot by their filenames. They are english.xml.gz and french.xml.gz. They contain only one link each because include_index and include_root are set to false by default in a group.

On the other hand, the default sitemap which we added /rss to has two links. The root url was added to it when we added /rss. If we hadn't added that link sitemap1.xml.gz would not have been created. So when we are using groups, the default sitemap will only be created if we add links to it.

The sitemap index file is shared by all groups. You can change its filename by setting SitemapGenerator::Sitemap.filename or by passing the :filename option to create.

The options you use when creating your groups will determine which and how many sitemaps are created. Groups will inherit the default sitemap when possible, and will continue the normal series. However a group will often specify an option which requires the links in that group to be in their own files. In this case, if the default sitemap were being used it would be finalized before starting the next sitemap in the series.

If you have changed your sitemaps physical location in a group, then the default sitemap will not be used and it will be unaffected by the group. Group sitemaps are finalized as they get full and at the end of each group.

In some circumstances you may need to conditionally add records to a group or perform some other more complicated logic. In these cases you can instantiate a group instance, add links to it and finalize it manually.

When called with a block, any partial sitemaps are automatically written out for you when the block terminates. Because this does not happen when instantiating manually, you must call finalize! on your group to ensure that it is written out and gets included in the sitemap index file. Note that group sitemaps will still automatically be finalized (written out) as they become full; calling finalize! is to handle the case when a sitemap is not full.

An example:

SitemapGenerator::Sitemap.verbose = true
SitemapGenerator::Sitemap.default_host = "http://www.example.com"
SitemapGenerator::Sitemap.create do
  odds = group(:filename => :odds)
  evens = group(:filename => :evens)

  (1..20).each do |i|
    if (i % 2) == 0
      evens.add i.to_s
    else
      odds.add i.to_s
    end
  end

  odds.finalize!
  evens.finalize!
end

And the output from running the above:

In '/Users/kvarga/Projects/sitemap_generator-test/public/':
+ odds.xml.gz                                             10 links /  371 Bytes
+ evens.xml.gz                                            10 links /  371 Bytes
+ sitemap.xml.gz                                        2 sitemaps /  240 Bytes
Sitemap stats: 20 links / 2 sitemaps / 0m00s

A news item can be added to a sitemap URL by passing a :news hash to add. The hash must contain tags defined by the News Sitemap specification.

SitemapGenerator::Sitemap.default_host = "http://www.example.com"
SitemapGenerator::Sitemap.create do
  add('/index.html', :news => {
      :publication_name => "Example",
      :publication_language => "en",
      :title => "My Article",
      :keywords => "my article, articles about myself",
      :stock_tickers => "SAO:PETR3",
      :publication_date => "2011-08-22",
      :access => "Subscription",
      :genres => "PressRelease"
  })
end

• :news - Hash
  • :publication_name
  • :publication_language
  • :publication_date
  • :genres
  • :access
  • :title
  • :keywords
  • :stock_tickers

Images can be added to a sitemap URL by passing an :images array to add. Each item in the array must be a Hash containing tags defined by the Image Sitemap specification.

SitemapGenerator::Sitemap.default_host = "http://www.example.com"
SitemapGenerator::Sitemap.create do
  add('/index.html', :images => [{
    :loc => 'http://www.example.com/image.png',
    :title => 'Image' }])
end

• :images - Array of hashes
  • :loc Required, location of the image
  • :caption
  • :geo_location
  • :title
  • :license

A video can be added to a sitemap URL by passing a :video Hash to add(). The Hash can contain tags defined by the Video Sitemap specification.

To add more than one video to a url, pass an array of video hashes using the :videos option.

SitemapGenerator::Sitemap.default_host = "http://www.example.com"
SitemapGenerator::Sitemap.create do
  add('/index.html', :video => {
    :thumbnail_loc => 'http://www.example.com/video1_thumbnail.png',
    :title => 'Title',
    :description => 'Description',
    :content_loc => 'http://www.example.com/cool_video.mpg',
    :tags => %w[one two three],
    :category => 'Category'
  })
end

• :video or :videos - Hash or array of hashes, respectively
  • :thumbnail_loc - Required. String, URL of the thumbnail image.
  • :title - Required. String, title of the video.
  • :description - Required. String, description of the video.
  • :content_loc - Depends. String, URL. One of content_loc or player_loc must be present.
  • :player_loc - Depends. String, URL. One of content_loc or player_loc must be present.
  • :allow_embed - Boolean, attribute of player_loc.
  • :autoplay - Boolean, default true. Attribute of player_loc.
  • :duration - Recommended. Integer or string. Duration in seconds.
  • :expiration_date - Recommended when applicable. The date after which the video will no longer be available.
  • :rating - Optional
  • :view_count - Optional. Integer or string.
  • :publication_date - Optional
  • :tags - Optional. Array of string tags.
  • :tag - Optional. String, single tag.
  • :category - Optional
  • :family_friendly- Optional. Boolean
  • :gallery_loc - Optional. String, URL.
  • :gallery_title - Optional. Title attribute of the gallery location element
  • :uploader - Optional.
  • :uploader_info - Optional. Info attribute of uploader element
  • :price - Optional. Only one price supported at this time
    • :price_currency - Required. In ISO_4217 format.
    • :price_type - Optional. rent or own
    • :price_resolution - Optional. HD or SD
  • :live - Optional. Boolean.
  • :requires_subscription - Optional. Boolean.

Pagemaps can be added by passing a :pagemap hash to add. The hash must contain a :dataobjects key with an array of dataobject hashes. Each dataobject hash contains a :type and :id, and an optional array of :attributes. Each attribute hash can contain two keys: :name and :value, with string values. For more information consult the official documentation on PageMaps.

• :pagemap - Hash
  • :dataobjects - Required, array of hashes
    • :type - Required, string, type of the object
    • :id - String, ID of the object
    • :attributes - Array of hashes
      • :name - Required, string, name of the attribute.
      • :value - String, value of the attribute.

SitemapGenerator::Sitemap.default_host = "http://www.example.com"
SitemapGenerator::Sitemap.create do
  add('/blog/post', :pagemap => {
    :dataobjects => [{
      :type => 'document',
      :id   => 'hibachi',
      :attributes => [
        { :name => 'name',   :value => 'Dragon' },
        { :name => 'review', :value => '3.5' },
      ]
    }]
  })
end

A useful feature for internationalization is to specify alternate links for a url.

Alternate links can be added by passing an :alternate Hash to add. You can pass more than one alternate link by passing an array of hashes using the :alternates option.

Check out the Google specification here.

SitemapGenerator::Sitemap.default_host = "http://www.example.com"
SitemapGenerator::Sitemap.create do
  add('/index.html', :alternate => {
    :href => 'http://www.example.de/index.html',
    :lang => 'de',
    :nofollow => true
  })
end

• :alternate/:alternates - Hash or array of hashes, respectively
  • :href - Required, string.
  • :lang - Optional, string.
  • :nofollow - Optional, boolean. Used to mark link as "nofollow".
  • :media - Optional, string. Specify media targets for responsive design pages.

SitemapGenerator::Sitemap.default_host = "http://www.example.com"
SitemapGenerator::Sitemap.create do
 add('/index.html', :alternates => [
        {
            :href => 'http://www.example.de/index.html',
            :lang => 'de',
            :nofollow => true
        },
        {
            :href => 'http://www.example.es/index.html',
            :lang => 'es',
            :nofollow => true
        }
    ])
end

Mobile sitemaps include a specific <mobile:mobile/> tag.

Check out the Google specification here.

SitemapGenerator::Sitemap.default_host = "http://www.example.com"
SitemapGenerator::Sitemap.create do
  add('/index.html', :mobile => true)
end

• :mobile - Presence of this option will turn on the mobile flag regardless of value.

Compatible with all versions of Rails and Ruby. Tested up to Ruby 3.1 and Rails 7.0. Ruby 1.9.3 support was dropped in Version 6.0.0.

Released under the MIT License. See the (MIT-LICENSE)[MIT-LICENSE] file.

MIT. See the LICENSE.md file.

Copyright (c) Karl Varga released under the MIT license