Class: Async::HTTP::Faraday::Adapter

Inherits:
Faraday::Adapter
  • Object
show all
Defined in:
lib/async/http/faraday/adapter.rb

Constant Summary collapse

CONNECTION_EXCEPTIONS = 
[
	Errno::EADDRNOTAVAIL,
	Errno::ECONNABORTED,
	Errno::ECONNREFUSED,
	Errno::ECONNRESET,
	Errno::EHOSTUNREACH,
	Errno::EINVAL,
	Errno::ENETUNREACH,
	Errno::EPIPE,
	IOError,
	SocketError
].freeze

Instance Method Summary collapse

Constructor Details

#initialize(*arguments, timeout: nil, **options, &block) ⇒ Adapter

Returns a new instance of Adapter.



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# File 'lib/async/http/faraday/adapter.rb', line 52

def initialize(*arguments, timeout: nil, **options, &block)
	super(*arguments, **options)
	
	@timeout = timeout
	
	@clients = {}
	
	@options = options
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/async/http/faraday/adapter.rb', line 102

def call(env)
	super
	
	# for compatibility with the default adapter
	env.url.path = '/' if env.url.path.empty?
	
	Sync do
		endpoint = Endpoint.new(env.url)
		
		if proxy = env.request.proxy
			proxy_endpoint = Endpoint.new(proxy.uri)
			client = self.proxy_client_for(proxy_endpoint, endpoint)
		else
			client = self.client_for(endpoint)
		end
		
		if body = env.body
			# We need to wrap the body in a Readable object so that it can be read in chunks:
			# Faraday's body only responds to `#read`.
			if body.respond_to?(:read)
				body = BodyReadWrapper.new(body)
			else
				body = ::Protocol::HTTP::Body::Buffered.wrap(body)
			end
		end
		
		if headers = env.request_headers
			headers = ::Protocol::HTTP::Headers[headers]
		end
		
		method = env.method.to_s.upcase
		
		request = ::Protocol::HTTP::Request.new(endpoint.scheme, endpoint.authority, method, endpoint.path, nil, headers, body)
		
		with_timeout do
			response = client.call(request)
			
			save_response(env, response.status, encoded_body(response), response.headers)
		end
	end
	
	return @app.call(env)
rescue Errno::ETIMEDOUT, Async::TimeoutError => e
	raise ::Faraday::TimeoutError, e
rescue OpenSSL::SSL::SSLError => e
	raise ::Faraday::SSLError, e
rescue *CONNECTION_EXCEPTIONS => e
	raise ::Faraday::ConnectionFailed, e
end

#client_for(endpoint) ⇒ Object 



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# File 'lib/async/http/faraday/adapter.rb', line 76

def client_for(endpoint)
	key = host_key(endpoint)
	
	@clients.fetch(key) do
		@clients[key] = make_client(endpoint)
	end
end

#close ⇒ Object 



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# File 'lib/async/http/faraday/adapter.rb', line 93

def close
	# The order of operations here is to avoid a race condition between iterating over clients (#close may yield) and creating new clients.
	clients = @clients.values
	
	@clients.clear
	
	clients.each(&:close)
end

#host_key(endpoint) ⇒ Object 



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# File 'lib/async/http/faraday/adapter.rb', line 66

def host_key(endpoint)
	url = endpoint.url.dup
	
	url.path = ""
	url.fragment = nil
	url.query = nil
	
	return url
end

#make_client(endpoint) ⇒ Object 



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# File 'lib/async/http/faraday/adapter.rb', line 62

def make_client(endpoint)
	Client.new(endpoint, **@connection_options)
end

#proxy_client_for(proxy_endpoint, endpoint) ⇒ Object 



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# File 'lib/async/http/faraday/adapter.rb', line 84

def proxy_client_for(proxy_endpoint, endpoint)
	key = [host_key(proxy_endpoint), host_key(endpoint)]
	
	@clients.fetch(key) do
		client = client_for(proxy_endpoint)
		@clients[key] = client.proxied_client(endpoint)
	end
end