Turn a URL Pathname into a Regular Expression

R's implementation of the JavaScript library 'path-to-regexp', it aims to provide R web frameworks features such as parameter handling among other URL path utilities.

pater

The goal of pater is to decompose a given pathname into meaningful tokens that will be later used to construct a regular expression useful when matching an HTTP request to a route handler.

Core to this are path parameters which are pieces of text you define in your route definitions and that will be filled when a new request comes in, they are useful because they act as identifiers for a given concept you care about.

Path parameters can appear anywhere you want inside a given path, they may share the same path segment or be next to plain text, given this the following are valid positions for path parameters:

• /text/:parameter
• /text/:parameter1-:parameter2
• /text1/:parameter1/text2{.:parameter2}
• /text1/*parameter

pater borrows its syntax from the original path-to-regexp implementation that you can read, understand and experiment with pater in R as the R implementation tries to be as close as possible to the original.

Installation

You can install the development version of pater like so:

# install.packages("pak")
# pak::pak("JulioCollazos64/pater")