Refactoring of FreeMED in Golang / Gin.

The backend uses:

• Go: Efficient programming language
• Gin: Web framework for Go
• Gin-JWT: JWT middleware for Gin
• GORP: Db access layer
• Go-MySQL-Driver: MySQL driver
• go-redis: Redis driver
• lumberjack: Rolling logger
• manners: Graceful http/https serving

The frontend uses:

• jQuery: Fast Javascript framework
• Popper: Pop-over management, required by bootstrap
• Bootstrap: Responsive framework
• Bootstrap-Switch: Switches for Bootstrap
• Knockout: MVVM UI toolkit
• Knockout.Mapping: Automatic JS object mapping for Knockout
• Select2: Extensible select widgets
• toastr: Toaster widget

Code in this repository can be run against a valid FreeMED 0.9.x series database with no modifications.

• MySQL's ONLY_FULL_GROUP_BY needs to be disabled -- at least until the queries have been rewritten to no longer require it. This can be temporarily accomplished with SET GLOBAL sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY',''));, but should have the actual MySQL server configuration adjusted for it in production systems.

• Redis Sessions. Sessions are stored in Redis, to decrease load on the MySQL server. (TODO: Move to Redis cluster for full redundancy)
• Authentication. Switched from cookies to renewable Bearer Authorization headers.
• UI Architecture. Switched from GWT pre-generated specific javascript to simple jQuery frontend with Bootstrap using RESTful API.

• Background image : CC BY-SA 2.0