sml-server-demo

Demonstration of sml-server in concert with a few MLKit extensions and libraries:

• Quotations for writing HTML and SQL queries.

• Database connectivity using a Postgresql client API.

• Fetching of HTTPS pages using OpenSSL.

Assumptions

A working MLKit installation. Use brew install mlkit on macOS or download a binary release from the MLKit github site.

The package manager smlpkg. Use brew install smlpkg on macOS or download a binary release from the smlpkg site.

A Postgresql database installation.

Testing

To test the library, first do as follows:

$ cd src
$ make prepare
$ make
...
$ ./demo.exe
HTTP/1.1 server started on port 8000
Use C-c to exit the server loop...

Notice that, dependent on the architecture, you may need first to set the environment variable MLKIT_INCLUDEDIR to something different than the default value /usr/share/mlkit/include/.

You may also need to set the environment variables SSL_INCLUDEDIR and SSL_LIBDIR to something different from the default values /usr/include/ssl and /usr/lib/ssl. You may also need to adjust the environment variables POSTGRESQL_INCLUDEDIR, which by default is set to /usr/include/postgresql.

For instance, if you use brew under macOS, you should do as follows:

$ cd src
$ make prepare
$ export MLKIT_INCLUDEDIR=/usr/local/share/mlkit/include
$ export SSL_INCLUDEDIR=/usr/local/opt/openssl/include
$ export SSL_LIBDIR=/usr/local/opt/openssl/lib
$ export POSTGRESQL_INCLUDEDIR=/usr/local/include/postgresql
$ make
...
$ ./demo.exe
HTTP/1.1 server started on port 8000
Use C-c to exit the server loop...

It may be necessary to tweak the file lib/github.com/melsman/sml-server-demo/Makefile to specify the location of the MLKit compiler binary, the MLKit include files, and the MLKit basis library.

Authors

Copyright (c) 2022 Martin Elsman, University of Copenhagen.

License

See LICENSE (MIT License).