PayPal Express Checkout - 2012 Guide de l'utilisateur télécharger pdf (Page 27)

Express Checkout Integration Guide August 7, 2012 27

Getting Started With Express Checkout

Express Checkout Features

Logging API Operations

You should log basic information from the request and response messages of each PayPal API

operation you execute. You must log the Correlation ID from the response message, which

identifies the API operation to PayPal and which must be provided to Merchant Technical

Support if you need their assistance with a specific transaction.

All responses to PayPal API operations contain information that may be useful for debugging

purposes. In addition to logging the Correlation ID from the response message, you can log

other information, such as the transaction ID and timestamp, to enable you to review a

transaction on the PayPal website or through the API. You could implement a scheme that logs

the entire request and response in a “verbose” mode; however, you should never log the

password from a request.

Encoding and Decoding Values

You must encode and decode all values sent in API operations. Only encode the value and not

the name in NVP and not the tags in SOAP.

You must encode all request field values in a request to PayPal and decode all field values in

the response. You must encode and decode individual values; do not encode or decode the

entire message. Browsers often attempt to encode and decode messages that are redirected to

or from them; however, you must verify that encoding and decoding is done correctly and only

to field values.

Express Checkout Features

Express Checkout features include ways to configure Express Checkout API reqeusts, ways to

customize the PayPal checkout pages, and additional settings you can specify.

Customizing the Express Checkout User Interface

You can customize the appearance of the PayPal Express Checkout pages. Some changes alter

the checkout flow.

Express Checkout includes options for presenting the checkout pages that appear when the

buyer logs into PayPal during checkout. Some of them make the PayPal pages look like your

own pages, giving the customer a consistent visual presentation:

 Logo to display

 Colors for the background and border

 Language in which PayPal content is displayed

 Your customer service number

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PayPal Express Checkout - 2012 Guide de l'utilisateur Page 27