Chapter 17: Design Considerations for HTMLRFC-Based SAP Interfaces
Overview
Many factors come into play when you are interfacing with an ERP system from an outside source such as ITS, Java (via BAPIs), or even regular RFCs (Remote Function Calls). The system with which you are connecting is an integrated system that must have data integrity throughout. You cannot post one side of an accounting transaction and ignore an error that occurs when you post the other side of the same transaction. You must also consider security of the system as a whole, and ensure that users can view or change only data that they are allowed to change.
Interfacing through a Web browser also has its complications, as you must consider not only the flow of the transaction through SAP, but also the browser's behavior in areas such as data caching. In addition, you must consider issues such as what happens when the user presses the Back button on the browser, which is local to the browser and is not communicated to SAP, and make sure that the transaction works for all brands of browsers to which your users have access. This chapter takes you through these and some other common problems so that your interfaces will be user-friendly and work smoothly and securely.
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