Object PmaWeb (Web server)
Description:
The object creates a Web server from the PROMOTIC application, i.e. it allows the application to provide for example HTML or XML pages.
In the
PmaWeb object it is possible to create the
PmaWebFolder,
PmaWebLang,
PmaWebDir and
PmaWebInfo objects.
This object can be created in objects:
PmaRoot,
PmaFolder,
PmaPrototype. Multiple objects of this type can be created in such objects.
This object inherits properties, methods and events of the
PmaObject object.
Properties and methods of this object:
| Port | Number of the TCP/IP port |
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Properties and methods inherited from the PmaObject object:
| AddEvent | Registers a function into selected event |
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| GetInfo | Returns the Info object with the specified name |
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| GetOwnedByIndex | Returns the subobject defined by its index |
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| GetOwnedByName | Returns reference to the subobject defined by its name |
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| GetOwnedByType | Array of references to the subobjects |
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| GetOwnedNum | Returns number of subobjects in the object |
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| GetPar | Reading the value of the Pma object parameter (or its parents) |
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| GetPathName | Object name with the path to this object |
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| GetPermission | Returns permission of corresponding operation from object |
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| Methods | Access to designer's methods of this object |
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| Name | Object name (without the path) |
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| Parent | Returns reference to the parent Pma object |
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| Pm | Returns reference to the Pma object or to its implementation subobject |
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| RemoveEvent | Un-registers the function in the specified event |
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| Root | Returns reference to the root application object PmaRoot |
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Events of this object:
| onNewRequest | (obsolete) Is triggered on the request for each new Web page |
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Events inherited from the PmaObject object:
| onStart | Is triggered for each object in the runtime only once at the beginning |
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| onStop | Is triggered for each Pma object in the runtime mode only once at the stop of the application |
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Configuration tabs:
| Object | General information about the object |
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| Events | Definition of object events algorithms |
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| Web | Setting TCP/IP parameters of the PROMOTIC Web |
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| Permissions | Object permissions |
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Note:
The object creates a Web server from the PROMOTIC application, i.e. it allows the application to provide for example HTML or XML pages. See
Overview of the Web technology in the PROMOTIC system and
HTTPS - secured HTTP protocol.
Except the objects inserted directly, also another objects (Web components) located elsewhere in the tree of
Pma objects can be registered into this object (e.g.
PmaPanel,
PmaWorkspace,
PmaTrendGroup,
PmaAlarmGroup,
PmaData objects, etc.). These objects are registered into this object using the "
Web server" tab in the "
PmaWeb object" configurator. All these objects will become Web subcomponent of this object, i.e. URL address of these subcomponents will begin with the URL address of this object.
The runtime information regarding the status of the PROMOTIC Web server communication with its clients (the statistics of HTTP transmissions, the contents of the last transmissions, etc.) can be observed in the "
/COMM/WebServer" item of the INFO system.
History:
Pm9.00.00: Object name changed:
PmWeb ->
PmaWeb
Pm8.02.16:
Fixed bug: Under high load the Web server stopped working (especially with setting of the
http service type).
Pm8.02.00:
"Web server type=http internal" now supports
persistent connection according to HTTP/1.1. It means that after each transmission, the connection is NOT terminated and therefore the communication is faster.
Pm8.01.09: The Web server has been improved - now supports the persistent connection type (standard for
HTTP/1.1), i.e. the connection with the Web browser is not closed after each transmission. This way the transfer rate is increased and the communication load is decreased.
Pm8.01.00: The new "
Web server type" configurator can be used in order to implement new Web server type
"HTTP(S) service". This server type allows to use more secure
HTTPS protocol.
Pm8.00.13: Other minor bugfixes are related to object.