ccavenue rails

ccavenue_with_rails

Integrating CCAvenue with Ruby on Rails site
Jul 30 · 2013

At www.dealbuddie.com, we recently had the need to integrate CCAvenue payment gateway to expand our delivery network across India. While CCAvenue provides sample files for php, jsp and C#, it had nothing to offer for rails. Since DealBuddie.com is developed using RoR, I had to build the required solution myself. 

Following are quick steps for anybody who wants to do the same - 

1) Create the functions required to create and verify your checksum, and add it to application_helper.rb

  def verifyChecksum( merchantID,  orderID,  amount,  authDesc,  workingKey,  checksum) 

    String str = merchantID+”|”+orderID+”|”+amount+”|”+authDesc+”|”+workingKey

    String newChecksum = Zlib::adler32(str).to_s

    return (newChecksum.eql?(checksum)) ? true : false

  end

  def getChecksum( merchantID,  orderID,  amount,  redirectUrl,  workingKey) 

    String str = merchantID + “|” + orderID + “|” + amount + “|” + redirectUrl + “|” + workingKey;

    return Zlib::adler32(str)

  end

2) Build the string needed to be passed to CCAvenue in Ruby. Example code below - 

    orderID = @transaction.id.to_s

    amount = @transaction.total_amount.to_s

    redirectURL = “http://www.dealbuddie.com/transactions/”[email protected]_s+”/ccavenue_redirect”

    checksum = getChecksum(CCAVENUE_MERCHANT_ID, orderID, amount, redirectURL, CCAVENUE_WORKING_KEY)

    @ccaRequest = 

      “Merchant_Id=”+CCAVENUE_MERCHANT_ID+”&”+

      “Amount=”+amount+”&”+

      “Order_Id=”+orderID+”&”+

      “Redirect_Url=”+redirectURL+”&”+

      “billing_cust_name=”+current_user.name+”&”+

      “billing_cust_address=”[email protected]_address+”&”+

      “billing_cust_country=”[email protected]+”&”+

      “billing_cust_tel=”[email protected]_phone+”&”+

      “billing_cust_email=”+current_user.email+”&”+

      “billing_cust_state=”[email protected]+”&”+

      “delivery_cust_name=”+current_user.name+”&”+

      “delivery_cust_address=”[email protected]_address+”&”+

      “delivery_cust_country=”[email protected]+”&”+

      “delivery_cust_state=”[email protected]+”&”+

      “delivery_cust_tel=”[email protected]_phone+”&”+

      “delivery_cust_notes=”+”Note”+”&”+

      “billing_cust_city=”[email protected]+”&”+

      “billing_zip_code=”[email protected]_s+”&”+

      “delivery_cust_city=”[email protected]+”&”+

      “delivery_zip_code=”[email protected]_s+”&”+

      “Checksum=”+checksum.to_s

3) Create the encrypted string to be sent to CCAvenue. You will need java to be installed on your server for this to work.       

    Dir.chdir(“#{RAILS_ROOT}/public/jars/”) do

      @encRequest = %x[java -jar ccavutil.jar #{CCAVENUE_WORKING_KEY} "#{@ccaRequest}" enc]

    end

4) Pass the encrypted request and merchant ID to a form, that auto-submits upon loading - 

<script type="text/javascript">

$(function() {

  $('#redirect').submit();

});

</script>

<form id="redirect" method="post" name="redirect" action="http://www.ccavenue.com/shopzone/cc_details.jsp">

<input type=hidden name=encRequest value=<%=@encRequest%>”>

<input type=hidden name=Merchant_Id value=<%=CCAVENUE_MERCHANT_ID%>>

</form>

5) Create an action in a controller that accepts the CCAvenue returned data, decrypt the data in that action, and give user the message about whether or not the transaction succeeded. 

  def ccavenue_redirect

    @encResponse = params[:encResponse]

    @checksum = false

    @authDesc = false

    @p = nil

    @ccaResponse = nil

    if (params[:encResponse])

            if @encResponse

        Dir.chdir(”#{RAILS_ROOT}/public/jars/”) do

               @ccaResponse = %x[java -jar ravi-ccavutil.jar #{CCAVENUE_WORKING_KEY} "#{@encResponse}" dec]

        end

        @p = Rack::Utils.parse_nested_query @ccaResponse

        if ([email protected]? && @p[“Merchant_Id”] && @p[“Order_Id”] && @p[“Amount”] && @p[“AuthDesc”] && @p[“Checksum”])

          @checksum = verifyChecksum(@p["Merchant_Id"], @p["Order_Id"], @p["Amount"], @p["AuthDesc"], CCAVENUE_WORKING_KEY, @p["Checksum"])

          @authDesc = @p["AuthDesc"].eql?("Y") ? true : false

        end

      end

      if @checksum && @authDesc 

        transaction = Transaction.find(@p["Order_Id"])

        transaction.payment_confirmed = true

        transaction.save!

        message = current_buyer.user.name + ”! Thank you for your order! It will soon be at your doorsteps!” 

        redirect_to root_path, :flash => {:success => message}

      else

        if !@authDesc

          message = current_buyer.user.name + ”! Your bank did not authorize the transaction. Please go to Settings > My Orders page, and click on "Pay Now" button to finish your transaction” 

          redirect_to root_path, :flash => {:error => message}

        else

          message = current_buyer.user.name + ”! Oops! There was some error in retrieving your transaction confirmation. Please drop us an email at [email protected] for order confirmation.” 

          redirect_to root_path, :flash => {:error => message}

        end

      end

    else

      message = current_buyer.user.name + ”! Oops! Something went wrong while processing your request. Please go to Settings > My Orders page, and click on "Pay Now" button to finish your transaction.” 

      redirect_to root_path, :flash => {:success => message}

    end

  end

http://world.ccavenue.com/downloads/CCAVenueWorldIntegrationManual.pdf