9.5 Downloading reports

Diagram of report download functionality

We can allow the user to download a report based on their exploration of an application.

• parameterized R Markdown is a good way to do this
• potential parameters - filters, simulation parameters
• specify parameters in YAML header of R Markdown document
• key idea - call rmarkdown::render() from content argument of downloadHandler()

9.5.1 Observe this in action

• Check out the app-download-report.R example

9.5.2 Some tips & tricks when including report download functionality:

• .Rmd renders in working directory so copy file temporary directory before rendering.
• .Rmd renders in current R process so consider running in separate session with e.g. callr package.