https://github.com/nealrichardson/httpcache

HTTP query cache for R
https://github.com/nealrichardson/httpcache

caching http-client logging rstats

Last synced: 6 months ago
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HTTP query cache for R

• Host: GitHub
• URL: https://github.com/nealrichardson/httpcache
• Owner: nealrichardson
• License: other
• Created: 2016-02-21T02:17:09.000Z (over 9 years ago)
• Default Branch: main
• Last Pushed: 2023-04-12T09:38:32.000Z (over 2 years ago)
• Last Synced: 2025-03-31T05:26:58.673Z (7 months ago)
• Topics: caching, http-client, logging, rstats
• Language: R
• Homepage: https://enpiar.com/r/httpcache/
• Size: 126 KB
• Stars: 12
• Watchers: 2
• Forks: 3
• Open Issues: 5
• Metadata Files:
  • Readme: README.md
  • Changelog: NEWS.md
  • License: LICENSE

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README

          
# httpcache: Query Cache for HTTP Clients

[![codecov.io](https://codecov.io/github/nealrichardson/httpcache/coverage.svg?branch=master)](https://codecov.io/github/nealrichardson/httpcache?branch=master) [![Build status](https://ci.appveyor.com/api/projects/status/twvekbpe3x2tk2g5?svg=true)](https://ci.appveyor.com/project/nealrichardson/httpcache) [![cran](https://www.r-pkg.org/badges/version-last-release/httpcache)](https://cran.r-project.org/package=httpcache)

In order to improve performance for HTTP API clients, `httpcache`

provides simple tools for caching and invalidating cache. It includes the

HTTP verb functions `GET`, `PUT`, `PATCH`, `POST`, and `DELETE`, which are drop-in

replacements for those in the [httr](https://httr.r-lib.org) package.

These functions are cache-aware and provide default settings

for cache invalidation suitable for RESTful APIs; the package also

enables custom cache-management strategies. Finally, `httpcache` includes

a basic logging framework to facilitate the measurement of HTTP request

time and cache performance.

## Installing

`httpcache` can be installed from CRAN with

    install.packages("httpcache")

The pre-release version of the package can be pulled from GitHub using the [remotes](https://github.com/r-lib/remotes) package:

    # install.packages("remotes")

    remotes::install_github("nealrichardson/httpcache")

## Getting started

Working with `httpcache` is as simple as loading the package in your interactive session or script instead of `httr`, or, in package development, importing the HTTP verb functions from `httpcache`. `GET()` responses are added to the local query cache; `PUT()`, `PATCH()`, `POST()`, and `DELETE()` requests trigger cache invalidation on the associated resources. You can override that default cache invalidation, and you can command the invalidation explicitly, with the invalidation functions `dropCache()`, `dropPattern()`, and `dropOnly()`. `clearCache()` wipes the cache completely.

See `vignette("httpcache")` for examples of the HTTP cache in practice.

## For developers

The repository includes a Makefile to facilitate some common tasks.

### Running tests

`$ make test`. Requires the [httptest](https://enpiar.com/r/httptest/) package. You can also specify a specific test file or files to run by adding a "file=" argument, like `$ make test file=logging`. `test_package` will do a regular-expression pattern match within the file names. See its documentation in the [testthat](https://testthat.r-lib.org) package.

### Updating documentation

`$ make doc`. Requires the [roxygen2](https://github.com/klutometis/roxygen) package.