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Http4s is a minimal, idiomatic Scala interface for HTTP services. Http4s is Scala's answer to Ruby's Rack, Python's WSGI, Haskell's WAI, and Java's Servlets. http4s servers and clients share an immutable model of requests and responses. Standard headers are modeled as semantic types, and entity codecs are done by typeclass. The pure functional side of Scala is favored to promote composability and easy reasoning about your code. I/O is managed through cats-effect. http4s is built on FS2, a streaming library that provides for processing and emitting large payloads in constant space and implementing websockets. http4s cross-builds for Scala.js and Scala Native. Share code and deploy to browsers, Node.js, native executable binaries, and the JVM.
Features
- Running the blaze backend requires a modern, supported version of the JVM to build and run
- Relies on server APIs unavailable before JDK8u252
- Any JDK newer than JDK8u252, including 9+ is supported
- Minimal, idiomatic Scala interface for HTTP services
- Http4s is Scala's answer to Ruby's Rack, Python's WSGI, Haskell's WAI, and Java's Servlets
- If you run into any difficulties please enable partial unification in your build.sbt
Project Samples
