A simple HTTP server in R
A simple HTTP server to serve files under a given directory based on the httpuv package.
You can install this package from CRAN (stable version) via
install.packages('servr')or r-universe.dev (development version).
This package is licensed under GPL.
To some degree, this package is like
python -m SimpleHTTPServeror
python -m http.server. It may be used to serve:
You can either run
servr::httd()in an interactive R session, or run from command line:
# default: port 4321, do not launch browser Rscript -e "servr::httd()"
open a web browser
Rscript -e "servr::httd()" -b
listen on port 4000
Rscript -e "servr::httd()" -p4000
pass arguments to the httd() function
Rscript -e "servr::httd(,4000,TRUE)"
There is also a shell script under
system.file('bin', package = 'servr'); if it is added to
PATH, you can simply run
servr # serve the current directory servr -b # launch the browser servr -b -p4000 # change port to 4000
httd(), the function
httw()can both serve and watch a directory. If you are viewing an HTML file in the browser, it will be automatically refreshed whenever there are any changes in the directory (e.g. you added, deleted, or modified certain files in the directory).
httd(), there are functions
rmdv2()in this package to serve HTML files generated from R Markdown documents (via knitr or rmarkdown). R Markdown documents can be automatically re-compiled when their HTML output files are older than the corresponding source files, and HTML pages in the web browser can be automatically refreshed accordingly, so you can focus on writing R Markdown documents, and results will be updated on the fly in the web browser. This is even more useful when you write R Markdown documents in the RStudio IDE, because the HTML files are displayed in the RStudio viewer pane, and you can put the source document and its output side by side.
vign()can be used to serve R Markdown/HTML package vignettes. The HTML output files are generated and displayed in the web browser so you can preview the vignettes, and they will be cleaned up after they are loaded in the web browser to make sure your source package is clean.
All server functions can be used in the daemonized mode, i.e., they can be non-blocking in the R session, which allows you to continue working in the R console after the server is launched. This mode can be set via the argument
daemon = TRUEin most server functions. See
?server_configfor more information.