CICS web support

To use CICS in a web context, you must plan and configure your system. Then you can write application programs and utility programs for CICS® web support.

Configuring CICS web support components
These components of CICS web support are needed for all CICS web support tasks. Configure them before starting to work with CICS web support.
Enabling CICS web support for CICS as an HTTP server
The CICS web support architecture for CICS as an HTTP server varies depending on the tasks that you want it to perform. Some configurable components of CICS web support are required for all tasks, such as the TCPIPSERVICE definitions for the ports that receive inbound requests. Other configurable components are required for specific tasks only.
Developing HTTP applications
In CICS, web-aware application programs use EXEC CICS WEB commands to interact with a web client or a server through CICS. For CICS as an HTTP server, these programs can receive and analyze HTTP requests and provide application-generated responses to the web client.
Defining resources for CICS as an HTTP server
You create some additional resource definitions for each CICS web support task that you want to perform.
Administering web support
When you have configured CICS to perform a variety of CICS web support tasks, and you have started to respond to requests from web clients, you might have to administer your CICS web support structure and to provide appropriate handling for requests if a resource is unavailable.
HTTP client requests from a CICS application
CICS can act as an HTTP client and communicate with an HTTP server on the Internet. A user-written application program sends requests through CICS to the HTTP server and receives the responses from it.
Security for CICS web support
When CICS is connected to the Internet, apply security measures to prevent unauthorized access to CICS applications and data and also to prevent third parties obtaining private information.
CICS web support and non-HTTP requests
You can use CICS web support to process inbound TCP/IP client requests that are not in the HTTP format, primarily to support requests from user-written clients that use nonstandard request formats. You define the processing and the response. No specific support is provided for any formally defined protocols for client-server communication.
CICS web support and 3270 display applications
When a 3270 transaction is accessed by a web client, CICS can display the output as an HTML form. Use the variants of the Web Terminal Translation Application (DFHWBTTA, DFHWBTTB, or DFHWBTTC) to provide web clients with access to applications that were originally designed to use the 3270 display system. CICS web support for 3270 applications supports the SEND, CONVERSE, and RECEIVE terminal control commands.
Creating HTML templates from BMS definitions
To create an HTML template from an existing BMS map set for which you do not have the source code, you might be able to reconstruct the source from the corresponding load module.
CICS web support in a CICSPlex
You can distribute applications that use CICS web support in a CICSPlex® using various methods individually or in combination.
Performance and tuning of CICS web support
You can tune several aspects of your system to improve the performance of CICS web support.

Last updated: Friday, 18 December 2020 08:52