402 lines
15 KiB
Ruby
402 lines
15 KiB
Ruby
# Copyright 2015 Google Inc.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
require 'addressable/uri'
|
|
require 'addressable/template'
|
|
require 'google/apis/version'
|
|
require 'google/apis/core/api_command'
|
|
require 'google/apis/core/batch'
|
|
require 'google/apis/core/upload'
|
|
require 'google/apis/core/download'
|
|
require 'google/apis/core/http_client_adapter'
|
|
require 'google/apis/options'
|
|
require 'googleauth'
|
|
require 'hurley'
|
|
require 'hurley/addressable'
|
|
|
|
module Google
|
|
module Apis
|
|
module Core
|
|
# Helper class for enumerating over a result set requiring multiple fetches
|
|
class PagedResults
|
|
include Enumerable
|
|
|
|
attr_reader :last_result
|
|
|
|
# @param [BaseService] service
|
|
# Current service instance
|
|
# @param [Fixnum] max
|
|
# Maximum number of items to iterate over. Nil if no limit
|
|
# @param [Boolean] cache
|
|
# True (default) if results should be cached so multiple iterations can be used.
|
|
# @param [Symbol] items
|
|
# Name of the field in the result containing the items. Defaults to :items
|
|
def initialize(service, max: nil, items: :items, cache: true, &block)
|
|
@service = service
|
|
@block = block
|
|
@max = max
|
|
@items_field = items
|
|
if cache
|
|
@result_cache = Hash.new do |h, k|
|
|
h[k] = @block.call(k, @service)
|
|
end
|
|
@fetch_proc = Proc.new { |token| @result_cache[token] }
|
|
else
|
|
@fetch_proc = Proc.new { |token| @block.call(token, @service) }
|
|
end
|
|
end
|
|
|
|
# Iterates over result set, fetching additional pages as needed
|
|
def each
|
|
page_token = nil
|
|
item_count = 0
|
|
loop do
|
|
@last_result = @fetch_proc.call(page_token)
|
|
items = @last_result.send(@items_field)
|
|
if items.kind_of?(Array)
|
|
for item in items
|
|
item_count = item_count + 1
|
|
break if @max && item_count > @max
|
|
yield item
|
|
end
|
|
elsif items
|
|
# yield singular non-nil items (for genomics API)
|
|
yield items
|
|
end
|
|
break if @max && item_count >= @max
|
|
break if @last_result.next_page_token.nil? || @last_result.next_page_token == page_token
|
|
page_token = @last_result.next_page_token
|
|
end
|
|
end
|
|
end
|
|
|
|
# Base service for all APIs. Not to be used directly.
|
|
#
|
|
class BaseService
|
|
# Root URL (host/port) for the API
|
|
# @return [Addressable::URI]
|
|
attr_accessor :root_url
|
|
|
|
# Additional path prefix for all API methods
|
|
# @return [Addressable::URI]
|
|
attr_accessor :base_path
|
|
|
|
# Alternate path prefix for media uploads
|
|
# @return [Addressable::URI]
|
|
attr_accessor :upload_path
|
|
|
|
# Alternate path prefix for all batch methods
|
|
# @return [Addressable::URI]
|
|
attr_accessor :batch_path
|
|
|
|
# HTTP client
|
|
# @return [Hurley::Client]
|
|
attr_accessor :client
|
|
|
|
# General settings
|
|
# @return [Google::Apis::ClientOptions]
|
|
attr_accessor :client_options
|
|
|
|
# Default options for all requests
|
|
# @return [Google::Apis::RequestOptions]
|
|
attr_accessor :request_options
|
|
|
|
# @param [String,Addressable::URI] root_url
|
|
# Root URL for the API
|
|
# @param [String,Addressable::URI] base_path
|
|
# Additional path prefix for all API methods
|
|
# @api private
|
|
def initialize(root_url, base_path)
|
|
self.root_url = root_url
|
|
self.base_path = base_path
|
|
self.upload_path = "upload/#{base_path}"
|
|
self.batch_path = 'batch'
|
|
self.client_options = Google::Apis::ClientOptions.default.dup
|
|
self.request_options = Google::Apis::RequestOptions.default.dup
|
|
end
|
|
|
|
# @!attribute [rw] authorization
|
|
# @return [Signet::OAuth2::Client]
|
|
# OAuth2 credentials
|
|
def authorization=(authorization)
|
|
request_options.authorization = authorization
|
|
end
|
|
|
|
def authorization
|
|
request_options.authorization
|
|
end
|
|
|
|
# TODO: with(options) method
|
|
|
|
# Perform a batch request. Calls made within the block are sent in a single network
|
|
# request to the server.
|
|
#
|
|
# @example
|
|
# service.batch do |s|
|
|
# s.get_item(id1) do |res, err|
|
|
# # process response for 1st call
|
|
# end
|
|
# # ...
|
|
# s.get_item(idN) do |res, err|
|
|
# # process response for Nth call
|
|
# end
|
|
# end
|
|
#
|
|
# @param [Hash, Google::Apis::RequestOptions] options
|
|
# Request-specific options
|
|
# @yield [self]
|
|
# @return [void]
|
|
def batch(options = nil)
|
|
batch_command = BatchCommand.new(:post, Addressable::URI.parse(root_url + batch_path))
|
|
batch_command.options = request_options.merge(options)
|
|
apply_command_defaults(batch_command)
|
|
begin
|
|
Thread.current[:google_api_batch] = batch_command
|
|
yield self
|
|
ensure
|
|
Thread.current[:google_api_batch] = nil
|
|
end
|
|
batch_command.execute(client)
|
|
end
|
|
|
|
# Perform a batch upload request. Calls made within the block are sent in a single network
|
|
# request to the server. Batch uploads are useful for uploading multiple small files. For larger
|
|
# files, use single requests which use a resumable upload protocol.
|
|
#
|
|
# @example
|
|
# service.batch do |s|
|
|
# s.insert_item(upload_source: 'file1.txt') do |res, err|
|
|
# # process response for 1st call
|
|
# end
|
|
# # ...
|
|
# s.insert_item(upload_source: 'fileN.txt') do |res, err|
|
|
# # process response for Nth call
|
|
# end
|
|
# end
|
|
#
|
|
# @param [Hash, Google::Apis::RequestOptions] options
|
|
# Request-specific options
|
|
# @yield [self]
|
|
# @return [void]
|
|
def batch_upload(options = nil)
|
|
batch_command = BatchUploadCommand.new(:put, Addressable::URI.parse(root_url + upload_path))
|
|
batch_command.options = request_options.merge(options)
|
|
apply_command_defaults(batch_command)
|
|
begin
|
|
Thread.current[:google_api_batch] = batch_command
|
|
yield self
|
|
ensure
|
|
Thread.current[:google_api_batch] = nil
|
|
end
|
|
batch_command.execute(client)
|
|
end
|
|
|
|
# Get the current HTTP client
|
|
# @return [Hurley::Client]
|
|
def client
|
|
@client ||= new_client
|
|
end
|
|
|
|
|
|
# Simple escape hatch for making API requests directly to a given
|
|
# URL. This is not intended to be used as a generic HTTP client
|
|
# and should be used only in cases where no service method exists
|
|
# (e.g. fetching an export link for a Google Drive file.)
|
|
#
|
|
# @param [Symbol] method
|
|
# HTTP method as symbol (e.g. :get, :post, :put, ...)
|
|
# @param [String] url
|
|
# URL to call
|
|
# @param [Hash<String,String>] params
|
|
# Optional hash of query parameters
|
|
# @param [#read] body
|
|
# Optional body for POST/PUT
|
|
# @param [IO, String] download_dest
|
|
# IO stream or filename to receive content download
|
|
# @param [Google::Apis::RequestOptions] options
|
|
# Request-specific options
|
|
#
|
|
# @yield [result, err] Result & error if block supplied
|
|
# @yieldparam result [String] HTTP response body
|
|
# @yieldparam err [StandardError] error object if request failed
|
|
#
|
|
# @return [String] HTTP response body
|
|
def http(method, url, params: nil, body: nil, download_dest: nil, options: nil, &block)
|
|
if download_dest
|
|
command = DownloadCommand.new(method, url, body: body)
|
|
else
|
|
command = HttpCommand.new(method, url, body: body)
|
|
end
|
|
command.options = request_options.merge(options)
|
|
apply_command_defaults(command)
|
|
command.query.merge(Hash(params))
|
|
execute_or_queue_command(command, &block)
|
|
end
|
|
|
|
# Executes a given query with paging, automatically retrieving
|
|
# additional pages as necessary. Requires a block that returns the
|
|
# result set of a page. The current page token is supplied as an argument
|
|
# to the block.
|
|
#
|
|
# Note: The returned enumerable also contains a `last_result` field
|
|
# containing the full result of the last query executed.
|
|
#
|
|
# @param [Fixnum] max
|
|
# Maximum number of items to iterate over. Defaults to nil -- no upper bound.
|
|
# @param [Symbol] items
|
|
# Name of the field in the result containing the items. Defaults to :items
|
|
# @param [Boolean] cache
|
|
# True (default) if results should be cached so multiple iterations can be used.
|
|
# @return [Enumerble]
|
|
# @yield [token, service]
|
|
# Current page token & service instance
|
|
# @yieldparam [String] token
|
|
# Current page token to be used in the query
|
|
# @yieldparm [service]
|
|
# Current service instance
|
|
# @since 0.9.4
|
|
#
|
|
# @example Retrieve all files,
|
|
# file_list = service.fetch_all { |token, s| s.list_files(page_token: token) }
|
|
# file_list.each { |f| ... }
|
|
def fetch_all(max: nil, items: :items, cache: true, &block)
|
|
fail "fetch_all may not be used inside a batch" if batch?
|
|
return PagedResults.new(self, max: max, items: items, cache: cache, &block)
|
|
end
|
|
|
|
protected
|
|
|
|
# Create a new upload command.
|
|
#
|
|
# @param [symbol] method
|
|
# HTTP method for uploading (typically :put or :post)
|
|
# @param [String] path
|
|
# Additional path to upload endpoint, appended to API base path
|
|
# @param [Hash, Google::Apis::RequestOptions] options
|
|
# Request-specific options
|
|
# @return [Google::Apis::Core::UploadCommand]
|
|
def make_upload_command(method, path, options)
|
|
template = Addressable::Template.new(root_url + upload_path + path)
|
|
if batch?
|
|
command = MultipartUploadCommand.new(method, template)
|
|
else
|
|
command = ResumableUploadCommand.new(method, template)
|
|
end
|
|
command.options = request_options.merge(options)
|
|
apply_command_defaults(command)
|
|
command
|
|
end
|
|
|
|
# Create a new download command.
|
|
#
|
|
# @param [symbol] method
|
|
# HTTP method for uploading (typically :get)
|
|
# @param [String] path
|
|
# Additional path to download endpoint, appended to API base path
|
|
# @param [Hash, Google::Apis::RequestOptions] options
|
|
# Request-specific options
|
|
# @return [Google::Apis::Core::DownloadCommand]
|
|
def make_download_command(method, path, options)
|
|
template = Addressable::Template.new(root_url + base_path + path)
|
|
command = DownloadCommand.new(method, template)
|
|
command.options = request_options.merge(options)
|
|
command.query['alt'] = 'media'
|
|
apply_command_defaults(command)
|
|
command
|
|
end
|
|
|
|
# Create a new command.
|
|
#
|
|
# @param [symbol] method
|
|
# HTTP method (:get, :post, :delete, etc...)
|
|
# @param [String] path
|
|
# Additional path, appended to API base path
|
|
# @param [Hash, Google::Apis::RequestOptions] options
|
|
# Request-specific options
|
|
# @return [Google::Apis::Core::DownloadCommand]
|
|
def make_simple_command(method, path, options)
|
|
template = Addressable::Template.new(root_url + base_path + path)
|
|
command = ApiCommand.new(method, template)
|
|
command.options = request_options.merge(options)
|
|
apply_command_defaults(command)
|
|
command
|
|
end
|
|
|
|
# Execute the request. If a batch is in progress, the request is added to the batch instead.
|
|
#
|
|
# @param [Google::Apis::Core::HttpCommand] command
|
|
# Command to execute
|
|
# @return [Object] response object if command executed and no callback supplied
|
|
# @yield [result, err] Result & error if block supplied
|
|
# @raise [Google::Apis::ServerError] An error occurred on the server and the request can be retried
|
|
# @raise [Google::Apis::ClientError] The request is invalid and should not be retried without modification
|
|
# @raise [Google::Apis::AuthorizationError] Authorization is required
|
|
def execute_or_queue_command(command, &callback)
|
|
batch_command = current_batch
|
|
if batch_command
|
|
batch_command.add(command, &callback)
|
|
nil
|
|
else
|
|
command.execute(client, &callback)
|
|
end
|
|
end
|
|
|
|
# Update commands with service-specific options. To be implemented by subclasses
|
|
# @param [Google::Apis::Core::HttpCommand] _command
|
|
def apply_command_defaults(_command)
|
|
end
|
|
|
|
private
|
|
|
|
# Get the current batch context
|
|
#
|
|
# @return [Google:Apis::Core::BatchRequest]
|
|
def current_batch
|
|
Thread.current[:google_api_batch]
|
|
end
|
|
|
|
# Check if a batch is in progress
|
|
# @return [Boolean]
|
|
def batch?
|
|
!current_batch.nil?
|
|
end
|
|
|
|
# Create a new HTTP client
|
|
# @return [Hurley::Client]
|
|
def new_client
|
|
client = Hurley::Client.new
|
|
client.connection = Google::Apis::Core::HttpClientAdapter.new unless client_options.use_net_http
|
|
client.request_options.timeout = request_options.timeout_sec
|
|
client.request_options.open_timeout = request_options.open_timeout_sec
|
|
client.request_options.proxy = client_options.proxy_url
|
|
client.request_options.query_class = Hurley::Query::Flat
|
|
client.ssl_options.ca_file = File.join(Google::Apis::ROOT, 'lib', 'cacerts.pem')
|
|
client.header[:user_agent] = user_agent
|
|
client
|
|
end
|
|
|
|
# Build the user agent header
|
|
# @return [String]
|
|
def user_agent
|
|
sprintf('%s/%s google-api-ruby-client/%s %s (gzip)',
|
|
client_options.application_name,
|
|
client_options.application_version,
|
|
Google::Apis::VERSION,
|
|
Google::Apis::OS_VERSION)
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|