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kantan.xpath is an XPath expression evaluation library for the Scala programming language.

Getting started

kantan.xpath is currently available for Scala 2.10, 2.11 and 2.12.

The current version is 0.1.10, which can be added to your project with one or more of the following line(s) in your SBT build file:

// Core library, included automatically if any other module is imported.
libraryDependencies += "com.nrinaudo" %% "kantan.xpath" % "0.1.10"

// Java 8 date and time instances.
libraryDependencies += "com.nrinaudo" %% "kantan.xpath-java8" % "0.1.10"

// Provides scalaz type class instances.
libraryDependencies += "com.nrinaudo" %% "kantan.xpath-scalaz" % "0.1.10"

// Provides cats type class instances.
libraryDependencies += "com.nrinaudo" %% "kantan.xpath-cats" % "0.1.10"

// Provides "dirty" HTML parsing through NekoHTML.
libraryDependencies += "com.nrinaudo" %% "kantan.xpath-nekohtml" % "0.1.10"

// Provides joda-time decoders.
libraryDependencies += "com.nrinaudo" %% "kantan.xpath-joda-time" % "0.1.10"

Motivation

Web scrapping is something that I have to do with some regularity, and the standard Scala XML library is not well suited for that task - not as well, at least, as a proper XPath implementation.

The standard Java library, on the other hand, has an acceptably efficient XPath API, but one that is hobbled, from a Scala perspective, by terrible types and safety issues. Everything throws and everything is a node.

kantan.xpath, then, is a thin layer over that Java API that attempts to provide much needed safety, useful types and as little boilerplate as possible.

Tutorials

The following tutorials are available: