data receiving and processing in JSON
This preconfiguration can be activated when creating a new object (e.g. by "New object ..."
in the local object menu or after pressing the Insert
key after selecting the object) and is included in the group: " / Communication / XML, JSON, CSV, text"
This preconfiguration can be created in the object: PmaFolder
- The preconfiguration is created including the panel (object of the PmaPanel
type) is functional also a Web panel
The preconfiguration creates an object of the PmaFolder
type containing two subfolders
Commun - allows communication with defined URL address that contains the JSON format data
Test - creates graphic panel for testing URL addresses Commun
Main object configured as communication driver. The PmaFolder
object has the StartReceive
method for initialization of the communication. The method has following parameters:
msgId - user identifier of the communication
msgUrl - data source URL address
msgPar - user parameter of the message
oRcv - the resulting data of the communication will be passed to the onReceive method of this object. In this object must be the "onReceive" method that can process the received data.
These parameters are passed in the Add
method of the PmaSequencer
object is configured in order to have each communication running outside the main working thread of the application PROMOTIC. In the onStep
event, there is an ActiveX object "Microsoft.XMLHTTP"
that gets the corresponding parameters for synchronous mode communication by the "open
" method. The "send"
method follows and receives or sends the data. The received data can be then processed as needed. The transmission is terminated by the abort
subobject with panel and data can be used for communication testing. The "onReceive"
method provides communication error detection and suggestion of received data processing. In panel method GetMsgList
, there are three functional URL addresses with identifiers that can be selected in the panel in order to test the communication. In this panel it is also possible to test any other URL address entered in the PmgString
object Msg Url address:
These configurators can be set before the preconfiguration is created:
|The name of created object||Name of the object created in the tree of Pma objects. The maximum name length is 30 characters. This is a system name, so it must contain only alphanumeric and must not contain any diacritics, empty string, spaces and the first character must not be a number.|