shinylogs

Logging tool for Shiny applications: record inputs or outputs changes, and infos about user’s session. All recording is done client-side to not slow down the application and occupy the server.

Installation

You can install the released version of shinylogs fromCRAN with:

install.packages("shinylogs")

And the development version fromGitHub with:

# install.packages("remotes")remotes::install_github("dreamRs/shinylogs")

Usage

Call the main functiontrack_usage in server part of application, and specify where to write logs:

library(shinylogs)track_usage(storage_mode=store_json(path="logs/"))

The function will record :

inputs : each time an input change, name, timestamp and value will be saved
errors : errors propagated through outputs
outputs : each time an output is re-generated
session : informations about user’s browser and the application

See the vignette for more details (?vignette("shinylogs")) or theonline version.

Examples

Some example of what is recorded with logs from applications available on our Shiny-Server:http://shinyapps.dreamrs.fr/

Number of connections per applications:

Number of connections over time :

Which tabs (from sidebar in {shinydashboard}) inshinyWidgets gallery are the most seen :

User-agent is recorded per connection and can be parsed withuaparserjs : (unique users are not registered as we use the open source version of shiny-server)