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`.
      # body = ::Protocol::HTTP::Body::Buffered.wrap(body)
      body = BodyWrapper.new(body)
    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