Class: ScaleRb::HttpClient

Inherits:
Object
  • Object
show all
Includes:
ClientShare
Defined in:
lib/scale_rb/client/http_client.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from ClientShare

#get_metadata, #get_storage

Constructor Details

#initialize(url) ⇒ HttpClient 



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# File 'lib/scale_rb/client/http_client.rb', line 14

def initialize(url)
  # check if the url is started with http or https
  url_regex = %r{^https?://}
  raise 'url format is not correct' unless url.match?(url_regex)

  @uri = URI.parse(url)
  @supported_methods = request('rpc_methods', [])[:methods]
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args) ⇒ Object 



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# File 'lib/scale_rb/client/http_client.rb', line 52

def method_missing(method, *args)
  request(method.to_s, args)
end

Instance Attribute Details

#supported_methods ⇒ Object

Returns the value of attribute supported_methods.



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# File 'lib/scale_rb/client/http_client.rb', line 12

def supported_methods
  @supported_methods
end

Instance Method Details

#request(method, params = []) ⇒ Object 



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# File 'lib/scale_rb/client/http_client.rb', line 23

def request(method, params = [])
  # don't check for rpc_methods, because there is no @supported_methods when initializing
  if method != 'rpc_methods' && !@supported_methods.include?(method)
    raise "Method `#{method}` is not supported. It should be in [#{@supported_methods.join(', ')}]."
  end

  http = Net::HTTP.new(@uri.host, @uri.port)
  http.use_ssl = @uri.scheme == 'https'

  request = Net::HTTP::Post.new(@uri, 'Content-Type' => 'application/json')
  request.body = { jsonrpc: '2.0', method:, params:, id: Time.now.to_i }.to_json
  ScaleRb.logger.debug "—→ #{request.body}"

  # https://docs.ruby-lang.org/en/master/Net/HTTPResponse.html
  response = http.request(request)
  raise response unless response.is_a?(Net::HTTPOK)

  # parse response, make key symbol
  body = JSON.parse(response.body, symbolize_names: true)
  ScaleRb.logger.debug "←— #{body}"
  raise body[:error] if body[:error]

  body[:result]
end

#respond_to_missing?(*_args) ⇒ Boolean 



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# File 'lib/scale_rb/client/http_client.rb', line 48

def respond_to_missing?(*_args)
  true
end