CN109343906B

CN109343906B - Method for loading ActiveX control by browser

Info

Publication number: CN109343906B
Application number: CN201811198627.7A
Authority: CN
Inventors: 不公告发明人
Original assignee: Jiangxi Kinggrid Technology Co ltd
Current assignee: Jiangxi Jinge Technology Co ltd
Priority date: 2018-10-15
Filing date: 2018-10-15
Publication date: 2021-06-25
Anticipated expiration: 2038-10-15
Also published as: CN109343906A

Abstract

The invention discloses a method for loading an ActiveX control by a Chrome browser, which is characterized by judging whether an ActiveX object is created or not when position information of an interface object is changed due to the change of webpage position information; determining according to the attribute of the ActiveX object and the method return value, if the return value is IDispatch type, creating a script object of script object, and returning to the browser; when the browser executes the JavaScript about the attributes and the methods of the ActiveX object, the attributes or the method calls which the ActiveX object should execute are searched according to the script object interface parameters on the script object instance, and then the corresponding attributes and method calls are executed. The interface is simple and easy to integrate to the application system.

Description

Method for loading ActiveX control by browser

Technical Field

The invention relates to a browser control technology, in particular to a method for loading an ActiveX control by a browser.

Background

Interpretation of terms:

ActiveX controls: microsoft corporation refers to a family of strategic object-oriented programming techniques and tools, the primary technique being the Component Object Model (COM), which is synonymous with the terms ActiveX, control, etc. herein.

Chrome browser: a web browser developed by Google corporation that is based on other open source software writing, including WebKit, aims to promote stability, speed, and security, and creates simple and efficient user interface software.

An ActiveX control can be viewed as a very small server application that cannot run independently and must be embedded in a container program to run with the container. This container includes a WEB page. The IE browser that we commonly use is a typical ActiveX container, which can browse and use ActiveX controls embedded in WEB pages.

The Chrome browser is not an ActiveX container per se, and cannot directly browse ActiveX controls in a WEB page. Therefore, Chrome uses netscape plug-in Application Programming interface (npapi) as a browser plug-in to load ActiveX.

Because of the security concern, the plug-in of the NPAPI can steal the system bottom authority and launch malicious attack. Therefore, in 2010, Chrome develops a new PPAPI (Peerplug-in API) on the basis of the original netscape NPAPI, all plug-ins are put into a sandbox to operate, and the support of the PPAPI interface is stopped at Chrome45 and subsequent versions. But this also seals all ActiveX control load interface in Chrome, some trusted ActiveX control is rejected by Chrome. The Chrome browser stops supporting the NPAPI interface, which means that a large number of legacy trusted middleware products will no longer be supported by the new version of the Chrome browser.

Disclosure of Invention

The invention provides a universal solution for loading ActiveX in Chrome45 and subsequent versions, which enables a PPAPI plug-in program to set up a bridge between a Chrome browser and a trusted ActiveX, so that the Chrome browser can create and use ActvieX through JavaScript as if an IE browser uses ActiveX.

The invention adopts the following technical scheme to achieve the purpose. A method for loading an ActiveX control by a Chrome browser comprises the following steps: the PPAPI plug-in program, the instantiated InstancePrivate interface object, the creation, display state and position information of an ActiveX object controlled by the interface object, and the script object to the proxy of the ActiveX object, and the proxy of the ActiveX object provides the method and attribute access of the ActvieX; when the position information of the webpage changes and the interface object changes the position information, judging whether an ActiveX object is created, if not, creating the ActiveX object; if created, ignore; an InstancePrivate instance corresponds to only one ActiveX object; according to the InstancePravate interface parameters, the display and the hiding of the ActiveX object and the position of the ActiveX object are transformed; determining according to the attribute of the ActiveX object and the method return value, if the return value is IDispatch type, creating a script object of script object, and returning to the browser; and searching the attribute or method call which should be executed by the ActiveX object according to the script object interface parameter on the script object instance, and then executing the corresponding attribute and method call.

In the invention, ActiveX is loaded by the Chrome PPAPI plugin, and three parts of creating a control, calling attributes and methods on an interface and responding to an event are mainly realized. ActiveX is created based on CLSID, so it is a universal creation mode applicable to all ActiveX. After the ActiveX is created, the Chrome PPAPPI plug-in is provided with an interface proxy module, and an IDispath automation interface of the ActiveX is used for calling the attribute and the method of the ActiveX for the script program of the WEB page to provide proxy service. If ActiveX throws an event while in use, the Chrome PPAPPI plug-in will look up and call a script response program on the WEB page for this event.

The invention realizes that the Chrome uses JavaScript codes to call the attribute and the method of the ActiveX by creating the PPAPI plug-in the Chrome browser, creating the ActiveX control by the PPAPI plug-in and acting through the PPAPI plug-in; through the PPAPI plugin proxy, Chrome responds to ActiveX's events using JavaScript code. Can support the creation of all activexs; the attribute and method of ActiveX can be called by supporting WEB page script; the event that WEB page scripts respond to ActiveX can be supported; the interface is simple and easy to integrate to the application system. Loading and using an ActiveX mode in a Chrome browser; compared with the NPAPI plug-in, the plug-in is only used for the version below the Chrome browser 45 and is suitable for all the Chrome browser versions; the property and method calling of ActiveX are kept consistent with those in IE browser in syntax; the CLSID is only needed to be transformed to be applicable to all activexs.

Drawings

FIG. 1 is a block diagram of the system architecture of the present invention.

FIG. 2 is a Chrome browser and InstantPrimate relationship diagram;

FIG. 3 is a Chrome browser and script object relationship diagram;

FIG. 4 is a script object proxy ActiveX object flow diagram;

FIG. 5 is a diagram of the event response relationship of the Chrome browser to ActiveX.

Detailed Description

The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and examples. The scheme adopted by the invention is as follows: the Chrome browser informs the PPAPI plugin of the intent to use ActiveX through JavaScript, the PPAPI plugin acts as a proxy, creates ActiveX, calls ActiveX properties and methods, and responds to ActiveX events.

See fig. 1 for a block diagram of the system architecture. The Chrome browser encapsulates the creation, calling and event response of ActiveX in a PPAPPI plug-in by loading ActiveX. The PPAPI plug-in acts as a proxy between the Chrome browser and ActiveX.

The PPAPI plug-in provides an instancePravate instance to the Chrome browser, the Chrome browser controls information such as the position and the display state of the PPAPI plug-in through the instance, and the Chrome browser manages the life cycle of an instancePravate instance object. A scripted object (script object) is created in the life cycle of the InstancePrivate instance object, the scripted object creates an ActiveX object, and finally the PPAPI plug-in returns the scripted object to the Chrome browser. Thereafter, the JavsScript engine of the Chrome browser can manipulate this scripted object through WEB scripting, and in fact, the Chrome browser manipulates an ActiveX object through a proxy for this scripted object, such as calling property methods, responding to events, and the like.

See fig. 2 and 3. The script object instance acts as a proxy between the Chrome browser and the ActiveX object, and converts the browser's operations on the script object's properties and methods into operations on the ActiveX's properties and methods.

See fig. 4. The ScriptObject is the core of the invention as a Chrome browser access agent to ActiveX objects. The script object acts as a proxy of an ActiveX object, and is viewed by the Chrome browser, namely the script object is ActiveX, and the JavaScript statement call for the attributes and the method of the ActiveX is the JavaScript statement call for the script object. For example, an ActiveX object has an attribute named prop, then according to the JavaScript object access syntax, the statement that assigns prop should be "activexObject. prop = 1", "activexObject is an instance of an ActiveX object", and a script object as a proxy should also support the same syntax, "activexObject. prop = 1", but this time activexObject is an instance of a script object. Then the conversion from script object to ActiveX object is one of the core of the present invention.

See fig. 5. The event of the ActiveX control enables the control to send an event notification to a container containing the ActiveX control, namely a webpage in a Chrome browser, the webpage calls an event processing function in a webpage script after receiving the event notification, and the webpage application program can realize that the event processing function makes a specific response to a specific event. The relation between the webpage script and the ActiveX event is established through an instancePrimate object, one side of the instancePrimate object receives the ActiveX event, the other side of the instancePrimate object is provided with an Window object of the webpage script, and the event response function in the webpage script can be called through the Window of the webpage script.

Chrome browser ActiveX plug-in system. Although the Chrome browser, especially after version 45, has been completely prohibited from using ActiveX for security reasons, there are still many ActiveX that can be trusted that should be supported on the Chrome browser for historical reasons. The Chrome browser ActiveX plug-in system allows ActiveX to be used in Chrome browser pages and maintains the same usage style as before in IE.

Claims

1. A method for loading an ActiveX control by a Chrome browser comprises the following steps: the PPAPI plug-in program, the instantiated InstancePrivate interface object, the creation, display state and position information of an ActiveX object controlled by the interface object, and the script object to the proxy of the ActiveX object, and the proxy of the ActiveX object provides the method and attribute access of the ActvieX; when the position information of the webpage changes and the interface object changes the position information, judging whether an ActiveX object is created, if not, creating the ActiveX object; if created, ignore; an InstancePrivate instance corresponds to only one ActiveX object; according to the InstancePravate interface parameters, the display and the hiding of the ActiveX object and the position of the ActiveX object are transformed; determining according to the attribute of the ActiveX object and the method return value, if the return value is IDispatch type, creating a script object of script object, and returning to the browser; and searching the attribute or method call which should be executed by the ActiveX object according to the script object interface parameter on the script object instance, and then executing the corresponding attribute and method call.