Record Everything that Happens in a 'Shiny' Application

Track and record the use of applications and the user's interactions with 'Shiny' inputs. Allows to trace the inputs with which the user interacts, the outputs generated, as well as the errors displayed in the interface.

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 from CRAN with:

install.packages("shinylogs")

And the development version from GitHub with:

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

Usage

Call the main function track_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 the online 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}) in shinyWidgets gallery are the most seen :

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