PayPal Gateway - 2013 Guia do Utilizador descarregar pdf (Página 51)

Gateway Developer Guide and Reference 07 February 2013 51

Sending a Simple Transaction to

the Server

When using the Payflow SDK, you send transactions to the Gateway server in name-value pair

format. Typically, a simple transaction includes connection parameters, user parameters, and

transaction data parameters.

 “About Name-Value Pairs” on page 51

 “Payflow Connection Parameters” on page 52

 “User Parameter Data” on page 53

 “Sale Transaction Example” on page 54

 “Formatting Payflow Gateway Transactions” on page 54

About Name-Value Pairs

Name-value pair (NVP) is the format you use to specify the parameter information you send in

a transaction request to the Payflow server. A name-value pair consists of the parameter name

and its value. The equal sign (=) is a special character that associates the name and its value:

PARAMNAME=value

Typically, you send several name-value pairs as a parameter string to the server. The

ampersand (&) is a special character that separates each name-value pair in the parameter

string:

PARAM1NAME=value&PARAM2NAME=value&PARAM3NAME=value

Follow the special character and syntax guidelines when creating name-value pairs.

Using Special Characters In Values

Because the ampersand (&) and equal sign (=) characters have special meanings, they are

invalid in a name-value pair value.

The following are invalid:

COMPANYNAME=Ruff & Johnson

COMMENT1=Level=5

To include special characters in the value portion of a name-value pair, use a length tag. The

length tag specifies the exact number of characters and spaces that appear in the value. The

following are valid.

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 255 256

Sem comentários

PayPal Gateway - 2013 Guia do Utilizador Página 51