US 20060122955 A1
The invention provides a system and method for a client connected to a server in a computer network to access a resource, such as an application, database (either local, server, or web-based), service and/or a file, stored in the network. The system comprises: the client in the network; the server in the network; an instance of the resource stored in at least one of the server and the client; a file associated with the application stored in at least one of the server and the client; and an access module operating to provide the client with access to the server. In the system at the client, a first icon associated with a said resource is provided and if the instance of the resource is stored at the server, the application is automatically accessed when the icon at the client is activated.
1. An access system for a client connected to a server in a computer network to a resource stored in said network, said system comprising:
said client in said network;
said server in said network;
an instance of said resource stored in at least one of said server and said client; and
an access module operating to provide said client with access to said server, wherein at said client, a first icon associated with said resource is provided; and
if said instance of said resource is stored at said server, said resource is automatically accessed when said first icon at said client is activated.
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said mapping is utilized to present icons on said client indicating where said resource resides.
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12. A method for presenting information to a client in a network where resources are stored in at least said client or a server in said network, said method comprising:
asking a user at said client to select whether a resource accessible by said client are to be searched first from a location comprising said client and a server in said network; and
if a response from said asking indicates that said resource is to be associated first with said server, providing an icon associated with said resource to indicate that said resource is associated with said server.
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The invention relates to a system and method for launching or accessing a resource in a computer network, in particular, a system and method of extending network resources for in and out of the workplace access.
Advantages of the Internet as an economical communications medium are driving companies to use it to deliver business critical applications and network data resources, enabling customers, partners, remote offices and mobile employees to work together and collaborate more efficiently.
However, a fundamental challenge facing organizations today is managing the increasing rate of required changes while maintaining business continuity. The process of building, deploying, integrating applications and melding with packaged applications and third-party data streams is becoming increasingly difficult. Today many enterprises approach migration with a growing series of uncoordinated tools to repeatedly build, rebuild, and update operating systems and several other tools for ongoing management. Web-based applications and data provide a key company resource in today's business environment. Legacy applications are a mix of mainframe and pure client/server applications.
In order to consider application redevelopments for the Web, this typically entails a long-term effort, requires significant capital expenditure and frequently results in losing the rich client functionality necessary in business-critical applications to enhance productivity.
Terminal-based or centralized hosting environments in which multiple terminals connect to a host computer (i.e. server based computing), applications and data are typically deployed, managed and supported on the server with solutions offering delivery and management over the Internet. The principle advantages of this form of deployment are reduced maintenance and support for client terminals, a standardized corporate client terminal and centralized resource management. However, for organizations with multiple locations and numerous users, the costs associated with traditional emulation software can be excessive due to costly individual licensing costs, maintenance, support and updates. Further web-based computing protocols within a server based computing model could be very sensitive to network delay, consuming a constant amount of unnecessary bandwidth, in addition to utilizing significant server resources for each user session. Another system is virtual private networks (VPN), which allow enterprises to carve secure and reliable “networks” out of the public Internet infrastructure. However, the very nature of a remote access VPN, being to provide secure access to distributed users at numerous remote locations, introduces deployment and maintenance concerns. VPNs are unable to deliver instant and continuous connectivity and are processor-intensive and bandwidth-heavy in use. Another drawback of VPNs is that a VPN client must be installed and maintained on every PC that requires access and each individual PC user must be trained to operate the VPN application. This configuration leads to source data, which often resides on laptop PCs or other devices, being left vulnerable to loss or theft. Once connected via a VPN the remote PC is granted full rights and privileges to roam the corporate network, which may be exploited by hackers using a remote VPN connection to gain access to corporate network resources.
There is a need for a system and method for providing access within the corporate environment, remote or mobile access to applications and data, which addresses deficiencies in the prior art.
In a first aspect, an access system controlling access of a client to resource, such as an application, database (either local, server, or web-based), service and/or a file, located within a network having a server and the client is provided. The system comprises: a client data interface defining data interfaces, data transmission rule sets, methods, and scripts associated with the client; a user profile associated with the client storing then data interfaces, then data transmission rule sets, then methods and then scripts; a server communicator controlling distribution of then user profile within then network; and an access module providing a bi-directional view of the application and the file between the server and the client. In the system, the client can selectively choose to search for the application from one of first searching for the application on the server and first searching for the application on the client. In the system, client interfaces may include and are not limited to: a desktop launcher, server desktop, or client desktop, and/or combination thereof.
In the system, the administrative interface may comprise a configuration management user interface on the client to define logical data interfaces, data transmission rule sets, methods, and scripts.
In the system, the logical export and import data interface may comprise export and import data connections, import and export data views and the import and export data bags.
In the system, the logical import data interface may import data from an import data source into the system.
In the system, the import data may be used during execution of then server communicator to load data from then import data source into then import data bags.
In the system, the logical export data interface may be used to export data from an export data source into an export data target client of the user profile delivery system.
In the system, an export data view of the export data bag may be used during execution of the server communicator to load data from then export data bag out to then export data target.
In the system, the server communicator may execute defined scripts stored in then user profile data.
In the system, the rule processor may be invoked by the server communicator to execute the user's requests and responses using either or both the import and export data bags based on data transmission rules.
In the system, the server communicator language may comprise a set of server communicator commands and a server communicator processor to process and execute each server communicator command lines.
In the system, the communicator commands may comprise: a load command; a display command for displaying data from a data bag into the export data target; a format command for formatting a data bag into a user display using a defined rule set; a execute command for executing a data bag from a user's request; and a save command for saving data from a client to an import data connection at the server.
In a second aspect, an access system for a client connected to a server in a computer network to resource, such as an application, database (either local, server, or web-based), service and/or a file, stored in the network is provided. The system comprises: the client in the network; the server in the network; an instance of the application stored in at least one of the server and the client; a file associated with the application stored in at least one of the server and the client; and an access module operating to provide the client with access to the server. In the system at the client, a first icon of the file is provided and if the instance of the application is stored at the server, the application is automatically accessed when the icon at the client is activated.
In the system, when the application is not stored on the client, the icon may have attributes associated a location of the application.
In the system, the client may be provided with an option of searching for the instance of the application on either the client first or the server first.
In the system, user profile data relating to a user at the client may be provided in the network. The user profile data may define rights and access privileges to resources relating to the application assigned to the client.
In the system, a configuration management interface may be provided defining logical data interfaces to resources relating to the application assigned to the client utilizing the user profile data.
In the system, a virtual drive map of files relating to the application may be built on the client. Therein, the drive map may utilize information from the user profile data and provides access of the files from the server to the client and from the client to the server.
In the system, a mapping of icon files and application files resident on the server may be provided to the client. Also, the mapping may be utilized to present icons on the client indicating where applications reside which may be implemented by the client.
In the system for server applications residing on the server, icons relating to files using the server applications may be presented to the client with a unique server indication when files associated with the applications are presented to the user.
In the system, when the resource resides on the client, an icon indicating that the resource resides on the client may be presented to the client. In the system, when the resource resides on the server, an icon indicating that the resource resides on the server may be presented to the client. In the system, the mapping may be used to overlay (e.g. ignore) icons that do not indicate correctly where the resource resides.
In the system, when said resource resides on said server, at said client a menu bar is presented in a GUI resources are reconfigured on said client via the access system, presenting said resource to said user as a server-based resource through said client.
In a third aspect, a method for presenting information to a client in a network where a resource, such as an application, database (either local, server, or web-based), service and/or a file, is stored in at least the client or a server in the network is provided. The method comprises: asking a user at the client to select whether applications for files accessible by the client are to be searched first from a location comprising the client and a server in the network; and utilizing information from a response to associate an icon associated with the file if the response indicates that the file is to be associated first with a remote application.
In the method, a user profile data relating to a user at the client may be provided in the network. Therein the user profile data defines rights and access privileges to resources relating to the application assigned to the client.
In the method, a configuration management interface may be provided defining logical data interfaces to resources relating to the application assigned to the client utilizing user profile data.
In the method a virtual drive map of files relating to the application may be built on the client, utilizing information from the user profile data and providing access of the files from the server to the client and from the client to the server.
In the method, for applications residing on the server, at the client a menu bar is presented in a GUI presenting the application to the user as a server-based application.
In other aspects various combinations of sets and subsets of the above aspects are provided.
The foregoing and other aspects of the invention will become more apparent from the following description of specific embodiments thereof and the accompanying drawings which illustrate, by way of example only, the principles of the invention. In the drawings, where like elements feature like reference numerals (and wherein individual elements bear unique alphabetical suffixes):
The description which follows, and the embodiments described therein, are provided by way of illustration of an example, or examples, of particular embodiments of the principles of the present invention. These examples are provided for the purposes of explanation, and not limitation, of those principles and of the invention. In the description, which follows, like parts are marked throughout the specification and the drawings with the same respective reference numerals.
An embodiment generally comprises a system and method of sharing files, applications and resources amongst elements in a network, such as a client and a server. In particular, a user at the client has local files and applications stored thereon and the server also has files and applications stored thereon. Frequently, an instance of an application may be installed on both the client and the server, e.g. Microsoft Word (trade-mark) or Microsoft Excel (trade-mark). The embodiment provides the client with access to both applications and allows the client to specify from which source (e.g. client or server) to first seek activation of the application. In providing such access, the embodiment provides bi-directional views of resources for both the client and the server. As an additional function, the embodiment indicates to the user at the client through an icon on his desktop GUI of whether a file associated with an application will be using either a local (client-side) instance of the application or a remote (server-side) instance. In order to facilitate these functions and operations, data relating to a client, its local applications, local files and access privileges are stored and selectively accessed by the server. Although the description provided herein focuses on sharing and accessing files and applications, the embodiment can also be used to share any resource which may be accessed in a network. Such resources may include: files and applications (as noted earlier), databases and services. Further detail on these features are provided below.
Server 6 comprises back end interface 10B of user profile delivery system 10, operating system 16, network layer 18, and various individual computing components 20, including network server 20A, webserver 20B, computer 20C, database 20D and server application 20E. Back end interface 10B is embodied as software and provides an interface for server 6 to client 4 through its front end interface 10A and comprises communication server 106, an interface with import data interface 108, an interface with export data interface 110, generic format databags 112, rule processor 114, user profile data 116 and configuration management user interface 118. Databags 112 provide transport for an remote procedure call (RPC) interface and may contain string or serializable java objects, which get serialized and deserialized on each end of the connection with the communication server 106. Rule processor 114 defines and implements rules of operation for server 6. User profile data 116 provides data for export data target 104. Configuration management user interface 118 provides a module for controlling and assigning the user profile data 116.
The embodiment provides visual information to identify a location in the network of an associated application for a file. Icons 2112A and 2112B have a subscript “K” displayed therein. This notation indicates that the location of the associated application does not reside on client 4, but on actually on server 6. It will be appreciated that in other embodiments, any other visual notation may be used.
In the top portion of window 2100, pull down menu 2116 provides a list of additional services and applications available to the user. Hosted application selection 2118 provides a listing of server-based applications 2114 which may be activated by the user. From the pull-down menu, service based applications are visually differentiated from local applications by providing an altered icon for the server-based application. In this particular implementation, the known icon for a Word application is augmented with a “K”, as shown. Other visual keys may be implemented.
In step 504 a license manager is invoked once communications between client 4 and server 6 are established. The license manager monitors the number of users accessing server 6 to ensure that there are enough valid user licenses available for the software, before authenticating a user to his user specific user profile. In step 504 b secure gateway can be turned on or off to access server 6.
In step 506 once a user is successfully authenticated, back end interface 10B exports user's profile data 116 via the server communicator 106 to export data target 104. User profile data 116 that is loaded into client 4 is used to interpret the user profile data interface, specific to each user and contains all the user rights and access privileges to network resources assigned to that user via the configuration management user interface 118. User profile data 116 contains attributes allowing the user to the following data: home folder, session ID, server desktop files and folders, shared folders, web drive, icons, logic, data, terminal services published applications, web based applications and services, and local PC access and local PC integration of server resources.
In step 508 user profile data contains attributes that dynamically map the local client 4, thereby making single or multiple server-network folders, files, and shared folders available to the user via client 4. During configuration, back end interface 10B stores the data of all published servers and PC's available to all users in the Users profile delivery database 116 d. At runtime, the system retrieves which servers and shares are permitted access to the individual client user, and builds a hierarchy of shares in IIS, complete with access permissions, mapping each individual share to a WebDAV folder in that user's unique virtual directory. WebDAV is the Web Distributed Authoring and Versioning extensions supported by IIS to allow bidirectional file access via HTTP/HTTPS, and virtual directory refers to an IIS virtual directory.
In step 510, server based hosted applications are published and distributed to specific users via the configuration management user interface 118. User profile data 116 dynamically checks for both local and server published and distributed applications and their associated icons. User profile data 116 uses icon logic to accurately populate the user profile data interface on client 4. Files on client 4 using server based application may be tagged with a unique smaller second image icon object that may be integrated into client 4 s standard desktop icon image object to differentiate files that are utilizing a server-based application versus a local application. Back end interface 10B may publish and distribute server-based applications to multiple servers to improve performance to multi-user environments. Server 6 may allow listing of several servers IPs in the server registry and then allow a distribution load balancing method of accessing hosted applications to be selected respective to the amount of users requesting this service. Distribution methods such as CPU load monitoring, round-robin methods, per-user per server count and random distributions.
In step 512, server 6 publishes web services and applications for distribution to specific users via configuration management user interface 118. The user profile data will accurately populate the user profile data interface on client 4.
In step 514, a logout process is provided wherein server 6 closes the user profile data interface on client 4. As a GUI, the user will click on the “x” in the top right hand corner of the active window or from the pull down tab selecting logout. Selecting yes will logout the user and disconnect his user profile session.
Referring now to
Referring now to
At step 702, the license keys for the application deployment are generated by a system administrator using a license manager application. Upon a successful logon to license manager application, at step 704 the license manager application generates a license key which encodes the number of users able to concurrently logon to the server and contains a digital key pair that preferably will only work with a specific version release of application installed on client 4. The digital key pair generated is made up of both a public digital key and a private digital key. The public key is integrated into back end interface 10B. At step 706 the private digital key is encoded in the license key for the specific version release is delivered to the customer via email or CD format and is installed on server 6 via configuration management user interface 118. At step 708, when there is a match between the private key and the public key the user is provided access to the system. At step 710, server 6 checks whether there is a valid license available for the user attempting to logon to server 6 to access his user profile data. At step 712, if a license is not available, the user will be prompted by an error message 714 informing him the situation. If there is a valid user license available, the user will successfully complete the logon process. Subsequently, at step 716, the user profile data interface interprets the user profile data on client 4.
Referring now to
The secure gateway may require a one-time install of a plug-in such as an active x plug-in on client 4 to run the hosted server based application. Client 4 can scan and detect if the plug-in is installed, and if not, a user will be prompted to install the plug-in. Once installed, each user from their user profile data interface may access user specific hosted server based applications that have assigned to them as defined by the configuration management user interface. At step 802 the user profile data is used to interpret the user profile data interface on client 4. At step 804 from the user data interface (which could be one or more, or a multitude of interfaces such as a desktop launcher, server desktop, or client 4), the user can invoke secure gateway tunneling by requesting a server-based hosted application, using for example a Remote Desktop Protocol (RDP) based connection. The user request is sent from client 4 to server 6 via an import data interface. Server 6 then establishes a TcpTunnel ISAPI plug-in, which reads the configuration information from server registry 116 c. The TcpTunnel plug-in is directed to several Terminal services, of which one can be client 4 that the plug-in is running on. At step 806 client 4 opens the TcpTunnel before the RDP window needs it. The RDP window then attaches to the Virtual Terminal Services Port (VTSP) as if it were a real terminal services server at step 808. The client, when ready to connect to the Terminal Server behind the firewall, starts its tunnel, creating a Virtual Terminal Services Port (VTSP). When the Client requests a connection to VTSP, it then begins to send connection information across the wire.
At step 810 a connection is made. A client 4 can issue five commands for a connection:
(1) open-This command opens a connection. The command indicates to server 6 that a tcp connection is imminent. It initiates buffers to be allocated and opens the port at server 6 to the destination server.
(2) close-This command closes a connection. A connection is also closed when a connection is broken.
(3) write-This command sends data to an open connection. This command requires no response. It leaves the HTTP/1.1 connection alive, which lowers lag time.
(4) read-This command starts a response thread, which is kept alive, and delivers data back to the client as the destination server has data to send.
(5) readwrite-This command performs one complete read and write of the data. Typically, this command is only used when client 4 cannot communicate with the separate requests.
In one embodiment, port knocking for an available port may be used to identify an available port at the server side. To initiate port knocking, the system can call an appropriate routine, such as TcpKnock.startKnockServer(int portLow, int portHigh), where the portLow and portHigh identify a start and end of the port range opened on the firewall for the knock service. It will be appreciated that port knocking does not require a specific port to be mapped to a specific server. Instead, a specific port sequence knock within a range of available ports is provided to identify an appropriate port to be dynamically mapped to a specific server.
One of those ports may be randomly used for the load balancing connection to server 6. When client 4 is connecting to server 6, at server 6, it calls String combo=TcpKnock.GetCombination(). The return value is provided to client 4 and identifies the int port=TcpKnockClient.StartConnection(combo) on which to perform porting knocking to identify an appropriate port to open. Once the value is returned, client 4 uses the port number to dynamically map available port to connect to server 6. When client 4 connects to that port (on the WAN interface) with the RDP client, the traffic is routed directly to the target server 6. Without knowing the specific sequence knock within a specified port range, all request trying to scan or access these ports may be rejected. For example, if the port knocking range is from 1600 to 1610, the port knocking sequence will open one of those ports by using a sequence knock established by the server to client for that specific application session. Each application session that is established will have its own knock sequence. When the port is open it will be dynamically mapped to a specific target server port 3389. When the session client 4 is complete, it does not need to do anything further to close the connection, as the RDP connection is closed automatically when the window is closed.
On the server side, at step 812 load balancing is performed. The TcpTunnel plug-in is aware of multiple targets, for when the server wants to use a specific method of load balancing terminal services server. Different methods of load balancing may include CPU load monitoring, round robin method, per user per server count and random. Further detail on load balancing is provided later. At step 814, data on the client 4 then flows through the virtual connection to the terminal services.
To provide bidirectional views, a virtual drive-mapping component dynamically sets up a client 4 with a bi-directional virtual drive that contains a user's data, files, and folders from server 6, including LAN PC shares on client 4. To the user, the virtual drive is accessed as if it were a local drive on client 4. It is mounted as a drive letter using any free letter the machine may have. Virtual drive-mapping component 900 also monitors for changes in data, files and folders to synchronize information between client 4 and server 6 after a user has successfully logged onto his user profile data interface from server 6. Using virtual drive-mapping component 900, data, files, and folders are transparently moved between client 4 and server 6 via communication link 8. To facilitate the virtual drive mapping, client 4 has an Installable File System (IFS) 902 that communicates at the operating system level to provide a bi-directional view for the user using the local client 4 and client applications (both local and server based applications). The server 6 dynamically builds a virtual directory at the server directory level. Then, the IFS from client 4, reads this virtual mapping directory. Depending on the client's selected preference in searching applications (i.e. to search for either local or server applications first), the user profile obtains and stores an inventory of both local and server based application, their extensions and their associated icons. The user profile also reconfigures the local client 4 to utilize this application to file association. The client bi-directional view means that a user can use either a local or server based application to save file back to the server using the virtual drive mapping. For example the bi-direction view allow using a local client application to save a file to the server. Therein, when a local word application is used on client 4, the user is able to: open the word application; edit document; and select “save as” and identify a server folder located by the dynamically virtual mapped drive on the client 4. As another example, the bi-directional views allow using a server hosted application to save a file to the server. Therein, when a server word application is activated on the client 4, the user is able to: open the word application; edit a document; and select “save as” and identify a server folder located by the dynamically virtual mapped drive on the client 4. In operation for the user, the virtual drive is assigned a drive letter that appears to be just like any other locally mapped drive. IFS 902 may be integrated into delivery system 10 and is loaded transparently for the user. The virtual drive-mapping component on client 4 dynamically selects the first available drive letter not used on client 4. The system may, once granted security access via a signed certificate that accompanies the download, dynamically install new drivers allowing IFS 902 to map in new drives if needed. The IFS allow multiple paths 904 on the network-server 906 and PCs 908 within a LAN or WAN to be mapped into a single drive letter on client 4, building a complete virtual drive which may include the user's home profile and multiple shared data, drives, folders, and files on one or more network-server and personal PCs.
The virtual drive-mapping component dynamically maps client 4 using rule processor 114 (with rule sets defined in the user's profile data), which utilizes an authentication protocols, such as Microsoft's Active directory (AD), to determine what access rights and privileges a user has to the server and personal PCs within a LAN or WAN. Using the windows API and these access rights and privileges, the WebDav server 910 is created to dynamically map the user's shared data, drives, folders, and files into a specially configured web server that provides access to these server 6 and PCs share within a LAN or WAN. These access rights and privileges are then extended and utilized by the virtual drive-mapping component on client 4 to dynamically map client 4. The virtual drive-mapping component communicates with back end interface 10B of server 4 via any of one of several types of connections, including: an Internet/Intranet/Extranet connection; dial-up connection; VPN connection; wireless connection; LAN; WAN; DSL/High speed connection or any other network connection. This allows a standard security measure to be installed, without the need to build additional modules. The WebDav component is installed in server 6 and may be hosted from a variety of WebServers including IIS from Microsoft, Apache and Tomcat. WebDAV is the Web Distributed Authoring and Versioning extensions supported by IIS to allow bidirectional file access via HTTP/HTTPS. Extensions exist to support WebDAV on other HTTP/HTTPS servers as well. This, coupled with the use of WebDrive as the IFS (Installable file system) on client 4, a drive letter is mapped into a virtual directory on the server, which contains the hierarchy of shares created in step 508.
At step 1114 the user profile interface evaluates the code that is sent to it to determine available paths. If the available paths have changed, the user profile interface will notify the system at step 1116 to refresh the user profile data interface on client 4 to accurately reflect and synchronize with server 6 in real time. This loop will continue to be performed until the user profile data interface is destroyed or closed.
The ability to publish and distribute hosted server based applications can be configured using the configuration management user interface 118 of the system. To publish server based hosted application, GUI 1200 is produced and the user selects “add”, application name from one of the many views available from the configuration management user interface. Then in GUI 1202 the user would type in any user-defined name for the hosted server based application, and its program path. For example, to launch a Microsoft Office word application, the application name could be “MS Word” or “Word”, and the application path could be “C:\Program Files\Microsoft Office\Office\WINWORD.exe”. Once the application name and path have been defined, the management console may then use a Microsoft server API to retrieve the associated extensions relative to the published application by selecting the assign extensions. Once extensions are retrieved, the server based hosted application being published may require that a default extension is assigned from the retrieved extension list to complete the publishing of that application. The published application is then written to database 1166 d. Once published, the server based hosted application can now be distributed by the configuration management user interface to multi profile users using selections shown in GUI 1204. The system may distribute applications using Microsoft's Active Directory (AD) users and user groups. From the management console, published applications may dynamically be distributed to existing Active Directory (AD) users or user groups. Each user or user group may have access to different published applications as defined by the configuration management user interface of the system. Once the published server based hosted applications have been distributed, the setting are then saved back to the database 116 d of the user profile data within the system.
Referring now to
File synchronization occurs at a connection instance and at the start or completion of an server based application. At connection and disconnection to the back end interface 10B, a user pulls files from a profile server or other profile sources and allows other users to interact with server files from their client 4 via the user profile data interface. Again, an interface may comprise of one or more interfaces such as a desktop launcher, server desktop, or client 4. When the system AppRunner process starts, its properties file can optionally contain information where to pull/restore files from primary profile file server source directory and the destination directory and copying files to the target before and after the Terminal Services server application runs. The AppRunner is a server-side program, which launches the server based application that the user selected, along with ensuring the user is logged out at the end of the session.
Referring now to
In particular, process flow 1500 for retrieving and displaying server and local client 4 icons on the user's profile data interface is shown. From a user profile data interface, the file-to-application association on client 4 is seamlessly and dynamically configured as per user's request. Icons are shared from server 6, as opposed to locally installed and configured applications. Icons for applications which client 4 does not have installed are derived from the server 6 application icons. These icons are encoded into java ImageIcon objects for transport, and then saved as “.ico” files for the client use. Java ImageIcons are Java library objects that are used to hold images, which are specifically used as icons inside of a Java application. Java does not allow these ImageIcons to be created from Windows ICO or .DLL resources. Instead a library for accessing icons from native sources and translated into Java ImageIcons is used, e.g. IconLib.dll. ImageIcons are transported from the server 6 to client 4 over link 8.
At step 1502 when the user profile data interface is launched, the server Iconlib.dll is invoked to retrieve all published hosted server based applications and their associated extensions using the system. The IconLib library handles all the native platform to Java translations for retrieving the icons from the system. These retrieved icons and their extensions are used to build a hash table on the server at step 1504. The hash table contains the relationships between the file extension (i.e. “.txt”) and the actual image. This hash table is then downloaded to the local client's 4 internal memory at step 1506. The user at login can select to use local or server applications first. If the user selects local applications first, client 4 Iconlib.dll is invoked to retrieve local applications and their associated extensions and then compare to server icons in client 4 internal memory to accurately populate the user profile data interface based on user's request. If the user selects server applications first, the server icons in client 4 memory are compared to the local client 4 Iconlib.dll retrieved applications and their associated extensions and are then used to accurately populate the user profile data interface based on user's request. The user profile contains the graphics for the icons and the path to run the application with. Both server 6 and local client 4 applications and their associated icons are then utilized by the system shell extension, which is activated when the user is logging in. The shell extension is used to add functionality (Icon Overlays, document activation, and Context Menu activation) to the Microsoft Windows Shell (Explorer).
The shell extension is comprised of two sides: a user profile data interface side (example: Java Side); and a client side (example: C++ Side). The user profile data interface side handles activation and deactivation of a C++ shell extension and registration of icons for un-handled extensions. On activation at step 1508, the shell extension first adjusts the extensions to fit the “.ext” pattern. At step 1510 the shell extension uses icons passed from server 6 to give icons to file patterns which have no local icons and override icons for applications that have local icon, when a client selects a “server first” for application execution. See for example, icon 2012 (
The C++ shell extensions are then enabled in step 1512 by storing the activation state in the Microsoft Windows Registry. Client 4 then starts listening and polling at step 1514 for any changes or updates to files and their associated extensions on client 4. Upon a deactivation process, at step 1516 when the user logs out of his user profile data interface on client 4, all changes to local icons are restored. The listener stops listening and polling at step 1518 and the C++ shell extension is then deactivated at step 1520.
The C++ side handles integration with the user profile data interface on client 4. It does this by implementing interfaces provided by 3 Comm, e.g. IShellExecuteHook which is used to capture document activation events; IContextMenu3 which is used to add entries to the document's context menu; and ShelllconOverlayldentifier, which is used to overlay icons on top of Icons defined by the system and pass control to a common object. At 1520, common object handles activation and deactivation, icon display logic, identifying existence of a handler for an application when an object is in client first mode and communicating via a message key to the Java side.
It is useful to note the Shell Extension is a set of stateless objects, as they store all of the current activation information in the Microsoft Windows Registry. This allows multiple Windows Shell processes to start, and share the activation information, even though that specific instance of the Windows Shell was not activated.
Referring now to
In other embodiments on a Solaris, Unix or Linux client, the client side of the application runs may be implemented in a similar fashion. However, provisions may need to be made for drive shares and implementions of Terminal Services. In particular, the drive shares may not be not mapped via WebDAV to the client. Instead the drive shares may use a NFS. Also, the client may not use a Microsoft implementation of the Terminal Services Remote Desktop Client. Instead it may use a RDesktop client as a library.
Turning now to aspects of activation of application and files, a description is provided first on a process for activating a local application for client 4 for a file stored on server 6.
As such, referring now to
Now, further detail is provided on selected interface and administrative functions of the embodiment.
In particular, publication and distribution of web applications and services are configured using the configuration management user interface 118 of the system. In GUI 1800 to publish web applications and services, a user selects “add” to add a web application or service name from one of the many views available from the configuration management user interface. Next in GUI 1802, the user enters any user defined name of the web application or services, and its URL location path. For example, if you are launching a Yahoo, the web application name could be “Yahoo”, and the application path could be “http://www.yahoo.com”. Once the web application or services name and path have been defined, selecting “save” in GUI 1804 writes the data to the database 116 d. Once published, the web application or service can now be distributed by the configuration management user interface to multi profile users. GUI 1806 provides the user with the interface to control this distribution. The system may distribute web applications or services using Microsoft's Active Directory (AD) users and user groups. From the management console, published web applications or services may dynamically be distributed to existing Active Directory (AD) users or user groups. Each user or user group may have access to different published web application or services as defined by the configuration management user interface of the system. Once the published server based hosted applications have been distributed, the setting are then saved back to the database 116 d of the user profile data within the system. To delete a web application or service, the user would select “delete” from the GUI 1804 to confirm action.
During login process 290 (
Turning back to load balancing and
Back end interface 10B performs several steps to connect the Windows Terminal Services client (RDPWindow) to the Window Terminal Services Server. When the client requires a connection, the system opens a tunneled HTTP/HTTPS connection to the server, which communicates to the ISAPI (Information Server API) plugin over HTTP (or HTTPS). This creates the Virtual Terminal Services Port (VTSP) on the client machine. Next, the RDPWindow attaches to the VTSP which, in turn begins communicating across the HTTP(or HTTPS) connection to the ISAPI plugin. When the first actual data reaches the ISAPI plugin, it selects a Windows Terminal Services server to connect to, and associates the VTSP with that actual Terminal Server. The selection process is a simple, round-robin selection.
Although the invention has been described with reference to certain specific embodiments, various modifications thereof will be apparent to those skilled in the art without departing from the scope of the invention as outlined in the claims appended hereto.