"This XML file does not appear..." How to see sitemap?

Question

How can I see what my sitemap looks like when I go to https://anthony-galli.s3.amazonaws.com/sitemaps/sitemap.xml.gz? I'm confronted with instead:

This XML file does not appear to have any style information associated with it. The document tree is shown below.
<Error>
<Code>AccessDenied</Code>
<Message>Access Denied</Message>
<RequestId>25B779FB11146233</RequestId>
<HostId>
94TdmdgzvdGCMVfKFZYL7Z3JASDFSa18N1YdUoMCtNa3qx6UHajPfMQSeFqfDmgYFHf
</HostId>
</Error>

It looks like the sitemap correctly built when I ran:

Anthony-Gallis-MacBook-Pro:blog galli01anthony$ heroku run rake sitemap:refresh --trace
WARNING: Toolbelt is currently updating
Running rake sitemap:refresh --trace on ⬢ anthony-galli... up, run.5920
** Invoke sitemap:refresh (first_time)
** Invoke sitemap:create (first_time)
** Invoke sitemap:require_environment (first_time)
** Execute sitemap:require_environment
** Invoke environment (first_time)
** Execute environment
** Execute sitemap:create
In '/app/public/sitemaps/':
+ sitemap.xml.gz                                          24 links /  982 Bytes
Sitemap stats: 24 links / 1 sitemaps / 0m00s

Pinging with URL 'http://www.anthonygalli.com/sitemap.xml.gz':
  Successful ping of Google
  Successful ping of Bing
** Execute sitemap:refresh

Pinging with URL 'http://www.anthonygalli.com/sitemap.xml.gz':
  Successful ping of Google
  Successful ping of Bing

routes.rb

get '/sitemap.xml.gz', to: redirect("https://#{ENV['AWS_BUCKET']}.s3.amazonaws.com/sitemaps/sitemap.xml.gz"), as: :sitemap

production.rb

  config.paperclip_defaults = {
    :storage => :s3,
    :s3_credentials => {
      :region => ENV['AWS_REGION'],
      :bucket => ENV['AWS_BUCKET'],
      :access_key_id => ENV['AWS_ACCESS_KEY_ID'],
      :secret_access_key => ENV['AWS_SECRET_ACCESS_KEY']
    }
  }

config/sitemap.rb

SitemapGenerator::Sitemap.default_host = 'http://www.anthonygalli.com/'
SitemapGenerator::Sitemap.public_path = 'public/sitemaps/'

SitemapGenerator::Sitemap.create do
  add posts_path, changefreq: 'daily'
  Post.find_each do |post|
    add post_path(post.slug), lastmod: post.updated_at
  end
end

SitemapGenerator::Sitemap.ping_search_engines

lib/tasks/sitemap.rake

require 'aws'

desc 'Upload the sitemap files to S3'
task upload_to_s3: :environment do
  puts 'Starting sitemap upload to S3...'
  s3 = Aws::S3::Resource.new
  bucket = s3.bucket(ENV['S3_BUCKET'])
  Dir.entries(File.join(Rails.root, 'tmp', 'sitemaps')).each do |file_name|
    next if %w(. .. .DS_Store).include? file_name
    path = "sitemaps/#{file_name}"
    file = File.join(Rails.root, 'tmp', 'sitemaps', file_name)
    object = bucket.object(path)
    object.upload_file(file)
    puts "Saved #{file_name} to S3"
  end
end

namespace :sitemap do
  # ...
  desc 'Create the sitemap, then upload it to S3 and ping the search engines'
  task create_upload_and_ping: :environment do
    Rake::Task["sitemap:create"].invoke

    Rake::Task["sitemap:upload_to_s3"].invoke

    SitemapGenerator::Sitemap.ping_search_engines('http://www.anthonygalli.com/sitemap.xml.gz')
  end
end

I followed along this tutorial: http://cookieshq.co.uk/posts/creating-a-sitemap-with-ruby-on-rails-and-upload-it-to-amazon-s3/

Answer 1

If you don't have GetPolicy permissions, Amazon S3 returns a 403 Access Denied error. —http://docs.aws.amazon.com/AmazonS3/latest/API/RESTBucketGETpolicy.html

Add this policy (created with https://awspolicygen.s3.amazonaws.com/policygen.html) to your s3 bucket to allow public access to the specific folder /sitemaps:

{
  "Id": "Policy1467935016977",
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "Stmt1467935004623",
      "Action": [
        "s3:GetObject"
      ],
      "Effect": "Allow",
      "Resource": "arn:aws:s3:::anthony-galli/sitemaps/*",
      "Principal": "*"
    }
  ]
}

---

UPDATE

In order to diagnose the issue, please update the question with the AWS provided URL of the object.