PayPal Express Checkout - 2010 Guide de l'utilisateur télécharger pdf (Page 36)

PayPal Name-Value Pair API Basics

Responding to an NVP Response

36 May 2010 Express Checkout Integration Guide

URL Decoding

All responses to HTTP POST operations used by the PayPal NVP API must be decoded.

The PayPal NVP API uses the HTTP protocol to send requests and receive responses from a

PayPal API server. You must decode all data returned using the HTTP protocol so that it can

be displayed properly. Most programming languages provide a way to decode strings.

NOTE: Most browsers decode responses to HTTP requests automatically.

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Express Checkout 1
Integration Guide 1
Contents 3
Intended Audience 9
Revision History 9
ABLE 1.1 Revision history 10
Introducing Express Checkout 11
Express Checkout Flow 14
Payment Option Entry Point 15
Express Checkout Buttons 16
Express Checkout Command 17
Express Checkout Token Usage 18
Express Checkout Button and 19
Logo Image Integration 19
Dynamic Images 20
Configuring the Dynamic Image 20
Set Up the Default Image 21
Set Up Image for Dynamic Use 21
Change the Locale 22
Choose the Image 22
Dynamic Image Parameters 23
Locale Codes 23
PayPal Name-Value Pair API 27
Multiple API Operations 28
API operations 29
Obtaining API Credentials 30
Creating an NVP Request 31
Specifying an API Credential 32
URL Encoding 33
Executing NVP API Operations 34
Responding to an NVP Response 35
URL Decoding 36
Implementing the Simplest 37
Express Checkout Integration 37
Testing an Express Checkout 43
Integration 43
Customizing Express Checkout 49
Providing Gift Options 58
Adding a Survey Question 61
PayPal Page Style 62
Changing the Locale 66
Handling Shipping Addresses 68
Shipping Address Override 72
Buyer Pays on PayPal 75
About the Instant Update API 77
Setting Up the Callback 82
Other Considerations 83
Using the Callback 85
Response Parameters 87
Callback Request 88
Callback Response 88
Immediate Payment 91
About Parallel Payments 97
Post-Integration Experience 98
Request Parameters: 102
[successResponseFields] 103
Handling Errors 108
Handling Payment Settlements 109
Handling Recurring Payments 113
Recurring Payments Terms 114
Specifying an Initial Payment 116
Updating Addresses 124
Updating the Billing Amount 124
Using Other PayPal API 127
Operations 127
Handling Payment Review 128
Checkout 131
Redirect the Buyer to PayPal 133
Complete the Transaction 134

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PayPal Express Checkout - 2010 Guide de l'utilisateur Page 36

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