Implementing a Disk Cache Plugin for Elixir's Req HTTP Client

2023/08/20

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The article discusses how to implement a disk cache plugin for Elixir's Req HTTP client. The author starts by highlighting the usefulness of Mix.install/2 for writing self-contained programs in Elixir. They then introduce the problem of slow data processing due to repetitive HTTP queries and the limitations of Req's built-in cache. To overcome this, the author demonstrates how to create a disk cache plugin for Req using the extensibility of the framework. They provide code snippets and explanations to guide developers through the implementation process. The plugin allows for automatic caching of HTTP responses, regardless of whether the remote server supports caching. By integrating the plugin into the Req pipeline, developers can take advantage of features like retries and decoding while improving the speed of local data experiments. Overall, this article provides valuable insights for developers looking to optimize HTTP caching in Elixir applications.