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Contents
module Goliath
module Rack
module Validator
module_function
# @param status_code [Integer] HTTP status code for this error.
# @param msg [String] message to inject into the response body.
# @param headers [Hash] Response headers to preserve in an error response;
# (the Content-Length header, if any, is removed)
def validation_error(status_code, msg, headers={})
headers.delete('Content-Length')
[status_code, headers, {:error => msg}]
end
# Execute a block of code safely.
#
# If the block raises any exception that derives from
# Goliath::Validation::Error (see specifically those in
# goliath/validation/standard_http_errors.rb), it will be turned into the
# corresponding 4xx response with a corresponding message.
#
# If the block raises any other kind of error, we log it and return a
# less-communicative 500 response.
#
# @example
# # will convert the ForbiddenError exception into a 403 response
# # and an uncaught error in do_something_risky! into a 500 response
# safely(env, headers) do
# raise ForbiddenError unless account_info['valid'] == true
# do_something_risky!
# [status, headers, body]
# end
#
#
# @param env [Goliath::Env] The current request env
# @param headers [Hash] Response headers to preserve in an error response
#
def safely(env, headers={})
begin
yield
rescue Goliath::Validation::Error => e
validation_error(e.status_code, e.message, headers)
rescue Exception => e
env.logger.error(e.message)
env.logger.error(e.backtrace.join("\n"))
validation_error(500, e.message, headers)
end
end
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems