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158 lines
4.0 KiB
Ruby
158 lines
4.0 KiB
Ruby
# frozen_string_literal: true
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class FakeS3
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attr_reader :s3_client
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def self.create
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s3 = self.new
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s3.stub_bucket(SiteSetting.s3_upload_bucket) if SiteSetting.s3_upload_bucket.present?
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s3.stub_bucket(File.join(SiteSetting.s3_backup_bucket, RailsMultisite::ConnectionManagement.current_db)) if SiteSetting.s3_backup_bucket.present?
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s3.stub_s3_helper
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s3
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end
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def initialize
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@buckets = {}
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@operations = []
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@s3_client = Aws::S3::Client.new(stub_responses: true, region: SiteSetting.s3_region)
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stub_methods
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end
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def bucket(bucket_name)
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bucket_name, _prefix = bucket_name.split("/", 2)
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@buckets[bucket_name]
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end
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def stub_bucket(full_bucket_name)
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bucket_name, _prefix = full_bucket_name.split("/", 2)
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s3_helper = S3Helper.new(
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full_bucket_name,
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Rails.configuration.multisite ? FileStore::S3Store.new.multisite_tombstone_prefix : FileStore::S3Store::TOMBSTONE_PREFIX,
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client: @s3_client
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)
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@buckets[bucket_name] = FakeS3Bucket.new(full_bucket_name, s3_helper)
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end
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def stub_s3_helper
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@buckets.each do |bucket_name, bucket|
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S3Helper.stubs(:new)
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.with { |b| b == bucket_name || b == bucket.name }
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.returns(bucket.s3_helper)
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end
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end
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def operation_called?(name)
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@operations.any? do |operation|
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operation[:name] == name && (block_given? ? yield(operation) : true)
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end
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end
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private
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def find_bucket(params)
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bucket(params[:bucket])
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end
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def find_object(params)
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bucket = find_bucket(params)
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bucket&.find_object(params[:key])
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end
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def log_operation(context)
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@operations << {
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name: context.operation_name,
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params: context.params.dup
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}
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end
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def calculate_etag(context)
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# simple, reproducible ETag calculation
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Digest::MD5.hexdigest(context.params.to_json)
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end
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def stub_methods
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@s3_client.stub_responses(:head_object, -> (context) do
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log_operation(context)
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if object = find_object(context.params)
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{ content_length: object[:size], last_modified: object[:last_modified], metadata: object[:metadata] }
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else
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{ status_code: 404, headers: {}, body: "" }
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end
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end)
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@s3_client.stub_responses(:get_object, -> (context) do
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log_operation(context)
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if object = find_object(context.params)
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{ content_length: object[:size], body: "" }
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else
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{ status_code: 404, headers: {}, body: "" }
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end
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end)
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@s3_client.stub_responses(:delete_object, -> (context) do
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log_operation(context)
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find_bucket(context.params)&.delete_object(context.params[:key])
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nil
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end)
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@s3_client.stub_responses(:copy_object, -> (context) do
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log_operation(context)
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source_bucket_name, source_key = context.params[:copy_source].split("/", 2)
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copy_source = { bucket: source_bucket_name, key: source_key }
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if context.params[:metadata_directive] == "REPLACE"
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attribute_overrides = context.params.except(:copy_source, :metadata_directive)
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else
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attribute_overrides = context.params.slice(:key, :bucket)
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end
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new_object = find_object(copy_source).dup.merge(attribute_overrides)
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find_bucket(new_object).put_object(new_object)
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{ copy_object_result: { etag: calculate_etag(context) } }
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end)
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@s3_client.stub_responses(:create_multipart_upload, -> (context) do
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log_operation(context)
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find_bucket(context.params).put_object(context.params)
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{ upload_id: SecureRandom.hex }
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end)
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@s3_client.stub_responses(:put_object, -> (context) do
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log_operation(context)
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find_bucket(context.params).put_object(context.params)
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{ etag: calculate_etag(context) }
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end)
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end
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end
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class FakeS3Bucket
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attr_reader :name, :s3_helper
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def initialize(bucket_name, s3_helper)
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@name = bucket_name
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@s3_helper = s3_helper
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@objects = {}
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end
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def put_object(obj)
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@objects[obj[:key]] = obj
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end
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def delete_object(key)
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@objects.delete(key)
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end
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def find_object(key)
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@objects[key]
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end
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end
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