Table of Contents
PowerBuilder DataWindow/DataStore/DataWindowChild (except for Composite, Crosstab, OLE 2.0, and RichText styles) can exchange JSON data with RESTFul Web services.
The JSONGenerator object constructs the JSON objects by adding values, objects, or arrays. JSONParser object loads the JSON data from a string or from a TXT file into a JSON object. JSONPackage merges data in a JSON object and extracts data from the JSON object. The data to be merged can be from DataWindow/DataStore/DataWindowChild, or from an existing JSON. The resulted JSON can be posted from the client to the server via HTTPClient, or retrieved from the server to the client via RESTClient. And to import JSON to or export JSON from the DataWindow control, DataStore object, or DataWindowChild object, you can use the DataWindow ImportJson/ImportJsonByKey/ExportJson functions.
The HTTPClient object sends HTTP requests and receives HTTP responses from a resource identified by a URI. Compared to the Inet object, HTTPClient is easier to use and supports more methods (Get/Post/Put/Delete) and more SSL protocols (TLS 1.0, TLS 1.1, TLS 1.2, SSL 2.0, and SSL 3.0). RESTClient object accesses the RESTful Web APIs and loads the JSON string returned from the RESTful Web APIs into the DataWindow object. The JSON string returned from the RESTFul Web Service APIs must have no more than 2 levels, and the top-level must be arrays, the second-level must be objects.
For more information about these objects and their functions/events/properties, see
the section called “JSONPackage object” in Objects and Controls
the section called “JSONGenerator object” in Objects and Controls
the section called “JSONParser object” in Objects and Controls
the section called “HTTPClient object” in Objects and Controls
the section called “RESTClient object” in Objects and Controls
the section called “ImportJson” in DataWindow Reference
the section called “ImportJsonByKey” in DataWindow Reference
the section called “ExportJson” in DataWindow Reference
the section called “CompressorObject object” in Objects and Controls
the section called “ExtractorObject object” in Objects and Controls.
