Server and web browser terminal emulator for persistent connection to a legacy host system and method of operation

A server for providing a persistent connection between a client system and a legacy host system, comprising:

• a client thread operable to communicate with a legacy host system across a first persistent connection;
• and
• applet code operable to create an applet process executing under a web browser on a client system, the applet process operable to communicate with the client thread across a second persistent connection and to provide a terminal session to a user of the client system;
• the server operable to download the applet code to a client system in response to receiving a uniform resource locator associated with the legacy host system;
• wherein the client thread is operable to communicate using a TN5250 data flow and the applet process is operable to provide a 5250 type terminal session.

A server for providing a persistent connection between a client system and a legacy host system, comprising:

• a client thread operable to communicate with a legacy host system across a first persistent connection;
• and
• applet code operable to create an applet process executing under a web browser on a client system, the applet process operable to communicate with the client thread across a second persistent connection and to provide a terminal session to a user of the client system;
• the server operable to download the applet code to a client system in response to receiving a uniform resource locator associated with the legacy host system;
• wherein the client thread is operable to communicate using a NVT data flow and the applet process is operable to provide a NVT type terminal session.

A server for providing a persistent connection between a client system and a legacy host system, comprising:

• a client thread operable to communicate with a legacy host system across a first persistent connection;
• and
• applet code operable to create an applet process executing under a web browser on a client system, the applet process operable to communicate with the client thread across a second persistent connection and to provide a terminal session to a user of the client system;
• the server operable to download the applet code to a client system in response to receiving a uniform resource locator associated with the legacy host system;
• wherein the client thread is operable to communicate using an VT220 data flow and the applet process is operable to provide a VT220 type terminal session.

A web browser terminal emulator for connecting a client system to a legacy host system, comprising:

• a client thread executing under a server on a server system, the client thread operable to communicate with a legacy host system across a first persistent connection;
• and
• an applet process executing under a web browser on a client system, the applet process operable to communicate with the client thread across a second persistent connection, and the applet process further operable to provide a terminal session to a user of the client system;
• such that the terminal session is supported by a persistent connection allowing real-time bidirectional communication with the legacy host system;
• wherein the client thread is operable to communicate using a TN3270 data flow and the applet process is operable to provide a 3270 type terminal session.

A computer network environment allowing connection of a client system to a legacy host system using a server, the computer network environment comprising:

• a legacy host system having TCP/IP connectivity, the legacy host system operable to support a terminal session for access to the legacy host system,
• a server system executing a client thread under a server, the client thread operable to communicate with the legacy host system across a first persistent connection;
• and
• a client system executing an applet process under a web browser, the applet process operable to communicate with the client thread across a second persistent connection and operable to provide a terminal session to a user of the client system;
• such that the terminal session is supported by a persistent connection allowing real-time bidirectional communication with the legacy host system;
• wherein the client thread is operable to communicate using a TN3270 data flow and the applet process is operable to provide a 3270 type terminal session.

A computer network environment allowing connection of a client system to a legacy host system using a server, the computer network environment comprising:

• a legacy host system having TCP/IP connectivity, the legacy host system operable to support a terminal session for access to the legacy host system;
• a server system executing a client thread under a server, the client thread operable to communicate with the legacy host system across a first persistent connection;
• and
• a client system executing an applet process under a web browser, the applet process operable to communicate with the client thread across a second persistent connection and operable to provide a terminal session to a user of the client system;
• such that the terminal session is supported by a persistent connection allowing real-time bidirectional communication with the legacy host system;
• wherein the client thread is operable to communicate using a TN5250 data flow and the applet process is operable to provide a 5250 type terminal session.

A computer network environment allowing connection of a client system to a legacy host system using a server, the computer network environment comprising:

• a legacy host system having TCP/IP connectivity, the legacy host system operable to support a terminal session for access to the legacy host system;
• a server system executing a client thread under a server, the client thread operable to communicate with the legacy host system across a first persistent connection;
• and
• a client system executing an applet process under a web browser, the applet process operable to communicate with the client thread across a second persistent connection and operable to provide a terminal session to a user of the client system;
• such that the terminal session is supported by a persistent connection allowing real-time bidirectional communication with the legacy host system;
• wherein the client thread is operable to communicate using an NVT data flow and the applet process is operable to provide an NVT type terminal session.

A computer network environment allowing connection of a client system to a legacy host system using a server, the computer network environment comprising:

• a legacy host system having TCP/IP connectivity, the legacy host system operable to support a terminal session for access to the legacy host system;
• a server system executing a client thread under a server, the client thread operable to communicate with the legacy host system across a first persistent connection;
• and
• a client system executing an applet process under a web browser, the applet process operable to communicate with the client thread across a second persistent connection and operable to provide a terminal session to a user of the client system;
• such that the terminal session is supported by a persistent connection allowing real-time bidirectional communication with the legacy host system;
• wherein the client thread is operable to communicate using a VT220 data flow and the applet process is operable to provide a VT220 type terminal session.

A method for connecting a client system to a legacy host system using a server, comprising:

• receiving a uniform resource locator by a server executing on a server system, the uniform resource locator associated with a legacy host system and selected from a web browser executing on a client system;
• downloading executable code for an applet process to the client system:
• executing the applet process under the web browser on the client system;
• connecting the applet process to a client thread executing under the server via a first persistent connection;
• connecting the client thread to a legacy host system associated with the uniform resource locator via a second persistent connection;
• communicating between the client thread and the legacy host system across the first persistent connection;
• communicating between the client thread and the applet process across the second persistent connection;
• and
• providing a terminal session to a user of the client system by the applet process, the terminal session allowing real-time bidirectional communication with the legacy host system across a persistent connection to the legacy host system;
• wherein providing a terminal session comprises providing a 3270 type terminal session.

A method for connecting a client system to a legacy host system using a server, comprising:

• receiving a uniform resource locator by a server executing on a server system, the uniform resource locator associated with a legacy host system and selected from a web browser executing on a client system;
• downloading executable code for an applet process to the client system;
• executing the applet process under the web browser on the client system;
• connecting the applet process to a client thread executing under the server via a first persistent connection;
• connecting the client thread to a legacy host system associated with the uniform resource locator via a second persistent connection;
• communicating between the client thread and the legacy host system across the first persistent connection;
• communicating between the client thread and the applet process across the second persistent connection;
• and
• providing a terminal session to a user of the client system by the applet process, the terminal session allowing real-time bidirectional communication with the legacy host system across a persistent connection to the legacy host system;
• wherein providing a terminal session comprises providing a 5250 type terminal session.

A method for connecting a client system to a legacy host system using a server, comprising:

• receiving a uniform resource locator by a server executing on a server system, the uniform resource locator associated with a legacy host system and selected from a web browser executing on a client system;
• downloading executable code for an applet process to the client system;
• executing the applet process under the web browser on the client system;
• connecting the applet process to a client thread executing under the server via a first persistent connection;
• connecting the client thread to a legacy host system associated with the uniform resource locator via a second persistent connection;
• communicating between the client thread and the legacy host system across the first persistent connection;
• communicating between the client thread and the applet process across the second persistent connection;
• and
• providing a terminal session to a user of the client system by the applet process, the terminal session allowing real-time bidirectional communication with the legacy host system across a persistent connection to the legacy host system;
• wherein providing a terminal session comprises providing an NVT type terminal session.

A method for connecting a client system to a legacy host system using a server, comprising:

• receiving a uniform resource locator by a server executing on a server system, the uniform resource locator associated with a legacy host system and selected from a web browser executing on a client system;
• downloading executable code for an applet process to the client system;
• executing the applet process under the web browser on the client system;
• connecting the applet process to a client thread executing under the server via a first persistent connection;
• connecting the client thread to a legacy host system associated with the uniform resource locator via a second persistent connection;
• communicating between the client thread and the legacy host system across the first persistent connection;
• communicating between the client thread and the applet process across the second persistent connection;
• and
• providing a terminal session to a user of the client system by the applet process, the terminal session allowing real-time bidirectional communication with the legacy host system across a persistent connection to the legacy host system;
• wherein providing a terminal session comprises providing a VT220 type terminal session.

A web browser terminal emulator for connecting a client system to a legacy host system, comprising:

• a client thread executing under a server on a server system, the client thread operable to communicate with a legacy host system across a first persistent connection;
• and
• an applet process executing under a web browser on a client system, the applet process operable to communicate with the client thread across a second persistent connection, and the applet process further operable to provide a terminal session to a user of the client system;
• such that the terminal session is supported by a persistent connection allowing real-time bidirectional communication with the legacy host system;
• wherein the client thread is operable to communicate using a TN5250 data flow and the applet process is operable to provide a 5250 type terminal session.

A web browser terminal emulator for connecting a client system to a legacy host system, comprising:

• a client thread executing under a server on a server system, the client thread operable to communicate with a legacy host system across a first persistent connection;
• and
• an applet process executing under a web browser on a client system, the applet process operable to communicate with the client thread across a second persistent connection, and the applet process further operable to provide a terminal session to a user of the client system;
• such that the terminal session is supported by a persistent connection allowing real-time bidirectional communication with the legacy host system;
• wherein the client thread is operable to communicate using an NVT data flow and the applet process is operable to provide an NVT type terminal session.

A web browser terminal emulator for connecting a client system to a legacy host system, comprising:

• a client thread executing under a server on a server system, the client thread operable to communicate with a legacy host system across a first persistent connection;
• and
• an applet process executing under a web browser on a client system, the applet process operable to communicate with the client thread across a second persistent connection, and the applet process further operable to provide a terminal session to a user of the client system;
• such that the terminal session is supported by a persistent connection allowing real-time bidirectional communication with the legacy host system;
• wherein the client thread is operable to communicate using a VT220 data flow and the applet process is operable to provide a VT220 type terminal session.