Class: Sinatra::JsonRpc::Handler

Inherits:
Object
  • Object
show all
Defined in:
lib/json_rpc/handler.rb

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Handler

Returns a new instance of Handler.



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# File 'lib/json_rpc/handler.rb', line 6

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/json_rpc/handler.rb', line 10

def call(env)
  @env = env
  unless valid_rpc_method?
    status, headers, body = @app.call(env)
    return [status, headers, body]
  end

  begin
    request_object
    @env["rack.logger"].info(request_object)
    @app.send request_method, request_params, request_id
  rescue NoMethodError
    raise if @app.available_methods.include?(request_method.to_sym)
    error request_id, -32_601, "Method not found"
  rescue JsonRpc::InvalidParametersError
    error request_id, -32_700, "Invalid params"
  rescue JSON::ParserError
    error nil, -32_700, "Parse error"
  end
end

#error(id, code, message) ⇒ Object 



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# File 'lib/json_rpc/handler.rb', line 44

def error(id, code, message)
  respond_with_error request_id: id, code: code, message: message
end

#parse_request_object ⇒ Object 



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# File 'lib/json_rpc/handler.rb', line 70

def parse_request_object
  @env["rack.input"].rewind
  JSON[@env["rack.input"].read]
end

#request_id ⇒ Object 



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# File 'lib/json_rpc/handler.rb', line 66

def request_id
  request_object.fetch("id")
end

#request_method ⇒ Object 



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# File 'lib/json_rpc/handler.rb', line 56

def request_method
  request_object["method"]
end

#request_object ⇒ Object 



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# File 'lib/json_rpc/handler.rb', line 48

def request_object
  parse_request_object
end

#request_params ⇒ Object 



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# File 'lib/json_rpc/handler.rb', line 60

def request_params
  request_object.fetch("params") do
    {}
  end
end

#respond_with_error(request_id:, code:, message:) ⇒ Object 



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# File 'lib/json_rpc/handler.rb', line 31

def respond_with_error(request_id:, code:, message:)
  error = {
    id:      request_id,
    jsonrpc: "2.0",
    error:   {
      code:    code,
      message: message
    }
  }

  [200, { "Content-type" => "application/json" }, error.to_json]
end

#valid_rpc_method? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/json_rpc/handler.rb', line 52

def valid_rpc_method?
  @env["REQUEST_METHOD"] == "POST" && @env["PATH_INFO"] == "/api"
end