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CMFPaypalHelper (0.2)
by
olena
—
last modified
2008-08-29
Released on 2008-08-27 by Pilot Systems for Plone 2.0, Plone 2.1, Plone 2.5, Plone 3.0, Plone 3.1 under GPL - GNU General Public License available for All platforms.
Software development stage: stable
- CMFPaypalHelper download link: http://plone.org/products/cmfpaypalhelper/releases
- Homepage of CMFPaypalHelper: http://plone.org/products/cmfpaypalhelper/
- CMFPaypalHelper repository: https://svn.plone.org/svn/collective/CMFPaypalHelper
- Description source: https://svn.plone.org/svn/collective/CMFPaypalHelper/README.txt
CMFPaypalHelper is a simple Zope product (for CMF) to ease the use of online payment using Paypal in CMF sites
Introduction
CMFPaypalHelper is a simple Zope product (for CMF) to ease the use of online payment using Paypal in CMF sites. It does not contain a cart system, nor any other online shop features.
How to use
Install the product in Zope as usual. For a Plone site, use the quickinstaller to install the tool. Then, call the 'makePaypalButton' on the tool to generate a button. A script you wrote will be called when the payment is validated, so you can process the order.You can specify two urls where your customer will be redirected, one if the payment is complete, one if the payment fails.
makePaypalButton
The 'makePaypalButton' of the tool does all the job for you. It'll return an HTML fragment which renders as a button doing the payment on Paypal.You need to specify a cart, which is just a list of item_name, price, quantity tuples. Those will be displayed to the customer on Paypal site. The total sum of prices*quantity will be the price charged by Paypal.
You can also sepcify a currency (if not, the default will be used), and two return URLs: one in case of success, one in case of failure.
A special 'custom' parameter will be kept alongside with the transaction, and given to your validation function. You can put a cart id or something similar in it.
validatePaypalPayment
Once a payment is validated, the validatePaypalPayment script is called, using acquisition (so you can put your own). This script should process with the order. Pay attention that's it's a server-server call, with no output.Your script will be called with two parameters: a 'verification_key', and a 'payment_info'. The 'payment_info' is a dictionnary with stuff about your payments, the most important one being the 'custom' you gave to 'makePaypalButton'.
The 'verification_key' is a way to ensure that this script is really called from the Paypal helper tool, and not from the Web (someone trying to validate a payment that was not validated by Paypal). You should call the 'checkVerificationKey' on the tool, giving it your 'custom' value and the 'verification_key'.
The 'verification_key' is in fact a cryptographic hash (md5, but you can change it to sha1 if you really need it) of a private key + the 'custom' value.
