# frozen_string_literal: true
require_relative 'constants'
require_relative 'request'
require_relative 'utils'
module Rack
class MethodOverride
HTTP_METHODS = %w[GET HEAD PUT POST DELETE OPTIONS PATCH LINK UNLINK]
METHOD_OVERRIDE_PARAM_KEY = "_method"
HTTP_METHOD_OVERRIDE_HEADER = "HTTP_X_HTTP_METHOD_OVERRIDE"
ALLOWED_METHODS = %w[POST]
def initialize(app)
@app = app
end
def call(env)
if allowed_methods.include?(env[REQUEST_METHOD])
method = method_override(env)
if HTTP_METHODS.include?(method)
env[RACK_METHODOVERRIDE_ORIGINAL_METHOD] = env[REQUEST_METHOD]
env[REQUEST_METHOD] = method
end
end
@app.call(env)
end
def method_override(env)
req = Request.new(env)
method = method_override_param(req) ||
env[HTTP_METHOD_OVERRIDE_HEADER]
begin
method.to_s.upcase
rescue ArgumentError
env[RACK_ERRORS].puts "Invalid string for method"
end
end
private
def allowed_methods
ALLOWED_METHODS
end
def method_override_param(req)
req.POST[METHOD_OVERRIDE_PARAM_KEY] if req.form_data? || req.parseable_data?
rescue Utils::InvalidParameterError, Utils::ParameterTypeError, QueryParser::ParamsTooDeepError
req.get_header(RACK_ERRORS).puts "Invalid or incomplete POST params"
rescue EOFError
req.get_header(RACK_ERRORS).puts "Bad request content body"
end
end
end
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