The low-level HTTP Client and a higher level implementation with the http package have been tested previously. This time, we will try another high level implementation of an HTTP client in Dart called dio . This client seems way more flexible than the previous clients, and embed great features. Furthermore, based on pub.dev, it looks like it's a popular choice. If you are interested to see some examples, you can look into example_dart/lib directory from their official repository . Anyway the first step to use it is to add it in the dependencies.

dart pub add dio dart pub get

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This time, instead of of using our own quick and dirty HTTP server using netcat or Python http.server module , let use the free HTTP Echo Server service .…