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# File 'app/helpers/pay_fu/alipay_helper.rb', line 5
def redirect_to_alipay_gateway(options={})
query_string = {
:partner => ActiveMerchant::Billing::Integrations::Alipay::ACCOUNT,
:out_trade_no => options[:out_trade_no],
:total_fee => options[:amount],
:seller_email => ActiveMerchant::Billing::Integrations::Alipay::EMAIL,
:notify_url => options[:notify_url],
:body => options[:body],
:"_input_charset" => 'utf-8',
:service => ActiveMerchant::Billing::Integrations::Alipay::Helper::CREATE_DIRECT_PAY_BY_USER,
:payment_type => "1",
:subject => options[:subject]
}.sort.map { |key, value| "#{key}=#{CGI.unescape(value)}" }.join("&")
sign = Digest::MD5.hexdigest(query_string + ActiveMerchant::Billing::Integrations::Alipay::KEY)
query_string += "&sign=#{sign}&sign_type=MD5"
redirect_to "https://www.alipay.com/cooperate/gateway.do?" + query_string
end
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