Implement Container Registry API client

7 files changed, 240 insertions, 38 deletions

diff --git a/lib/image_registry/blob.rb b/lib/image_registry/blob.rb
new file mode 100644
index 00000000000..1aeeba7a686
--- /dev/null
+++ b/lib/image_registry/blob.rb
@@ -0,0 +1,47 @@
+module ImageRegistry
+  class Blob
+    attr_reader :repository, :config
+
+    def initialize(repository, config)
+      @repository = repository
+      @config = config || {}
+    end
+
+    def valid?
+      digest.present?
+    end
+
+    def digest
+      config['digest']
+    end
+
+    def type
+      config['mediaType']
+    end
+
+    def size
+      config['size']
+    end
+
+    def revision
+      digest.split(':')[1]
+    end
+
+    def short_revision
+      revision[0..8]
+    end
+
+    def client
+      @client ||= repository.client
+    end
+
+    def delete
+      client.delete_blob(repository.name, digest)
+    end
+
+    def data
+      return @data if defined?(@data)
+      @data ||= client.blob(repository.name, digest, type)
+    end
+  end
+end
diff --git a/lib/image_registry/client.rb b/lib/image_registry/client.rb
new file mode 100644
index 00000000000..b2e43ce4aeb
--- /dev/null
+++ b/lib/image_registry/client.rb
@@ -0,0 +1,64 @@
+require 'faraday'
+require 'faraday_middleware'
+
+module ImageRegistry
+  class Client
+    attr_accessor :uri
+
+    MANIFEST_VERSION = 'application/vnd.docker.distribution.manifest.v2+json'
+
+    def initialize(base_uri, options = {})
+      @base_uri = base_uri
+      @faraday = Faraday.new(@base_uri) do |builder|
+        builder.request :json
+        builder.headers['Accept'] = MANIFEST_VERSION
+
+        builder.response :json, :content_type => /\bjson$/
+        builder.response :json, :content_type => 'application/vnd.docker.distribution.manifest.v1+prettyjws'
+
+        if options[:user] && options[:password]
+          builder.request(:basic_auth, options[:user].to_s, options[:password].to_s)
+        elsif options[:token]
+          builder.request(:authentication, :Bearer, options[:token].to_s)
+        end
+
+        builder.adapter :net_http
+      end
+    end
+
+    def repository_tags(name)
+      @faraday.get("/v2/#{name}/tags/list").body
+    end
+
+    def repository_manifest(name, reference)
+      @faraday.get("/v2/#{name}/manifests/#{reference}").body
+    end
+
+    def put_repository_manifest(name, reference, manifest)
+      @faraday.put("/v2/#{name}/manifests/#{reference}", manifest, { "Content-Type" => MANIFEST_VERSION }).success?
+    end
+
+    def repository_mount_blob(name, digest, from)
+      @faraday.post("/v2/#{name}/blobls/uploads/?mount=#{digest}&from=#{from}").status == 201
+    end
+
+    def repository_tag_digest(name, reference)
+      response = @faraday.head("/v2/#{name}/manifests/#{reference}")
+      response.headers['docker-content-digest'] if response.success?
+    end
+
+    def delete_repository_tag(name, reference)
+      @faraday.delete("/v2/#{name}/manifests/#{reference}").success?
+    end
+
+    def blob(name, digest, type = nil)
+      headers = {}
+      headers['Accept'] = type if type
+      @faraday.get("/v2/#{name}/blobs/#{digest}", nil, headers).body
+    end
+
+    def delete_blob(name, digest)
+      @faraday.delete("/v2/#{name}/blobs/#{digest}").success?
+    end
+  end
+end
diff --git a/lib/image_registry/config.rb b/lib/image_registry/config.rb
new file mode 100644
index 00000000000..1c2abec1bfa
--- /dev/null
+++ b/lib/image_registry/config.rb
@@ -0,0 +1,15 @@
+module ImageRegistry
+  class Config
+    attr_reader :tag, :blob, :data
+
+    def initialize(tag, blob)
+      @tag, @blob = tag, blob
+      @data = JSON.parse(blob.data)
+    end
+
+    def [](key)
+      return unless data
+      data[key]
+    end
+  end
+end
diff --git a/lib/image_registry/registry.rb b/lib/image_registry/registry.rb
new file mode 100644
index 00000000000..d8de8e392e9
--- /dev/null
+++ b/lib/image_registry/registry.rb
@@ -0,0 +1,14 @@
+module ImageRegistry
+  class Registry
+    attr_reader :uri, :client
+
+    def initialize(uri, options = {})
+      @uri = URI.parse(uri)
+      @client = ImageRegistry::Client.new(uri, options)
+    end
+
+    def [](name)
+      ImageRegistry::Repository.new(self, name)
+    end
+  end
+end
diff --git a/lib/image_registry/repository.rb b/lib/image_registry/repository.rb
new file mode 100644
index 00000000000..f4f4ba65afc
--- /dev/null
+++ b/lib/image_registry/repository.rb
@@ -0,0 +1,38 @@
+module ImageRegistry
+  class Repository
+    attr_reader :registry, :name
+
+    def initialize(registry, name)
+      @registry, @name = registry, name
+    end
+
+    def client
+      @client ||= registry.client
+    end
+
+    def [](tag)
+      ImageRegistry::Tag.new(self, tag)
+    end
+
+    def manifest
+      return @manifest if defined?(@manifest)
+      @manifest = client.repository_tags(name)
+    end
+
+    def valid?
+      manifest.present?
+    end
+
+    def tags
+      return @tags if defined?(@tags)
+      return unless manifest && manifest['tags']
+      @tags = manifest['tags'].map do |tag|
+        ImageRegistry::Tag.new(self, tag)
+      end
+    end
+
+    def delete
+      tags.each(:delete)
+    end
+  end
+end
diff --git a/lib/image_registry/tag.rb b/lib/image_registry/tag.rb
new file mode 100644
index 00000000000..2bf0b8e345f
--- /dev/null
+++ b/lib/image_registry/tag.rb
@@ -0,0 +1,62 @@
+module ImageRegistry
+  class Tag
+    attr_reader :repository, :name
+
+    def initialize(repository, name)
+      @repository, @name = repository, name
+    end
+
+    def valid?
+      manifest.present?
+    end
+
+    def manifest
+      return @manifest if defined?(@manifest)
+      @manifest = client.repository_manifest(repository.name, name)
+    end
+
+    def [](key)
+      return unless manifest
+      manifest[key]
+    end
+
+    def digest
+      return @digest if defined?(@digest)
+      @digest = client.repository_tag_digest(repository.name, name)
+    end
+
+    def config
+      return @config if defined?(@config)
+      return unless manifest && manifest['config']
+      blob = ImageRegistry::Blob.new(repository, manifest['config'])
+      @config = ImageRegistry::Config.new(self, blob)
+    end
+
+    def created_at
+      return unless config
+      @created_at ||= DateTime.rfc3339(config['created'])
+    end
+
+    def layers
+      return @layers if defined?(@layers)
+      return unless manifest
+      @layers = manifest['layers'].map do |layer|
+        ImageRegistry::Blob.new(repository, layer)
+      end
+    end
+
+    def total_size
+      return unless layers
+      layers.map(&:size).sum
+    end
+
+    def delete
+      return unless digest
+      client.delete_repository_tag(repository.name, digest)
+    end
+
+    def client
+      @client ||= repository.client
+    end
+  end
+end
diff --git a/lib/registry_client.rb b/lib/registry_client.rb
deleted file mode 100644
index 87518a7b39c..00000000000
--- a/lib/registry_client.rb
+++ /dev/null
@@ -1,38 +0,0 @@
-require 'HTTParty'
-
-class RegistryClient
-  attr_accessor :uri
-
-  def initialize(uri)
-    @uri = uri
-  end
-
-  def tags(name)
-    response = HTTParty.get("#{uri}/v2/#{name}/tags/list")
-    response.parsed_response['tags']
-  end
-
-  def tag(name, reference)
-    response = HTTParty.get("#{uri}/v2/#{name}/manifests/#{reference}")
-    JSON.parse(response)
-  end
-
-  def tag_digest(name, reference)
-    response = HTTParty.head("#{uri}/v2/#{name}/manifests/#{reference}")
-    response.headers['docker-content-digest'].split(':')
-  end
-
-  def delete_tag(name, reference)
-    response = HTTParty.delete("#{uri}/v2/#{name}/manifests/#{reference}")
-    response.parsed_response
-  end
-
-  def blob_size(name, digest)
-    response = HTTParty.head("#{uri}/v2/#{name}/blobs/#{digest}")
-    response.headers.content_length
-  end
-
-  def delete_blob(name, digest)
-    HTTParty.delete("#{uri}/v2/#{name}/blobs/#{digest}")
-  end
-end