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# frozen_string_literal: true
module Aws
module RpcV2
class ErrorHandler < Aws::ErrorHandler
def call(context)
# Malformed responses should throw an http based error, so we check
# 200 range for error handling only for this case.
@handler.call(context).on(200..599) do |response|
if !valid_response?(context)
code, message, data = http_status_error(context)
response.error = build_error(context, code, message, data)
elsif (300..599).cover?(context.http_response.status_code)
response.error = error(context)
end
response.data = nil
end
end
private
def valid_response?(context)
req_header = context.http_request.headers['smithy-protocol']
resp_header = context.http_response.headers['smithy-protocol']
req_header == resp_header
end
def extract_error(body, context)
data = RpcV2.decode(body)
code = error_code(data, context)
message = data['message']
data = parse_error_data(context, body, code)
[code, message, data]
rescue Cbor::Error
[http_status_error_code(context), '', EmptyStructure.new]
end
def error_code(data, context)
code =
if aws_query_error?(context)
query_header = context.http_response.headers['x-amzn-query-error']
error, _type = query_header.split(';') # type not supported
remove_prefix(error, context)
else
data['__type']
end
if code
code.split('#').last
else
http_status_error_code(context)
end
end
def parse_error_data(context, body, code)
data = EmptyStructure.new
if (error_rules = context.operation.errors)
error_rules.each do |rule|
# match modeled shape name with the type(code) only
# some type(code) might contains invalid characters
# such as ':' (efs) etc
match = rule.shape.name == code.gsub(/[^^a-zA-Z0-9]/, '')
next unless match && rule.shape.members.any?
data = Parser.new(rule).parse(body)
end
end
data
end
def aws_query_error?(context)
context.config.api.metadata['awsQueryCompatible'] &&
context.http_response.headers['x-amzn-query-error']
end
def remove_prefix(error_code, context)
if (prefix = context.config.api.metadata['errorPrefix'])
error_code.sub(/^#{prefix}/, '')
else
error_code
end
end
end
end
end
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