devries / cloud-run-pascal

Example web service in Pascal, deployed via Google Cloud Run

cloud-run-pascal

Example web service in Pascal, deployed via Google Cloud Run

This code demonstrates how to create and deploy a web service written in Pascal, using Google Cloud Run. The Pascal program that provides the service is wrapped in a small Python program that receives the web requests, runs the Pascal program, and then creates a web response containing the output of the Pascal program.

The web service is invoked via an HTTPS GET request with a single path parameter, the number to be converted. It returns the given value, converted to Roman numerals.

The Pascal program is very basic, and was adapted from an example in Kathleen Jensen's and Niklaus Wirth's Pascal User Manual and Report, published in 1974. It does not handle Roman numeral shortcuts, such as IV for 4, instead using the long version in those cases, like IIII.

This is obviously not the way to create a Roman numeral web service today, but there are legacy programs in a variety of languages not supported in today's managed serverless platforms that would be useful to have as web services. This example shows how to make that happen.