The site has some sample code for generating the image files programmatically. Here is an example in Erlang:
To generate an image from a description in a text file such as:
client->server: POST request containing style and message note right of server: server generates PNG file server->client: server returns JSON containing image name client->server: GET request for image server->client: server returns PNG file
Read the file into Erlang and render the description:
inets:start(),
{ok, Bin} = file:read_file("descr.txt"),
wsd:render([{message, binary_to_list(Bin)}]).
The output looks like:
