gof-art

A small web service that take an image from somewhere and create a nice ascii art version of it.

It is used to show some feature of Golang:

• Simple Native http framework
• Simple Native JSON encoding
• go test with -race, -bench and -cover options
• go routine
• channels

Quick test

curl -H "Content-Type: application/json" \
--request POST \
--data '{"url":"http://localhost:9999/Gophers.jpg","width":250}' \
http://localhost:9999/naive > test.txt

Quick tour

Default port is 9999.

Every route /naive, /mutex and /channel does the same stuff:

• POST allow to upload a Ascii-converted image from any image on the net
• GET return the last upload ascii art.

The only differency is the implementation, and the handle of the concurrency on the uploaded art :

• /naive just use a plain variable, with no security. It's a wrong implementation (since it is open to dataraces)
• /mutex use a mutex to secure the variable that contains the last posted art.
• /channel use a monitor with channels to secure the variable that contains the last posted art. It's really go-like.

There is also another route that contains a pretty image : /Gophers.jpg