parse-xml.main.kts

#!/usr/bin/env kotlin

@file:Repository("https://repo.maven.apache.org/maven2/")
@file:DependsOn("com.squareup.okhttp3:okhttp:4.12.0")

import okhttp3.OkHttpClient
import okhttp3.Request
import org.w3c.dom.Document
import org.xml.sax.InputSource
import java.io.StringReader
import javax.xml.parsers.DocumentBuilderFactory
import javax.xml.xpath.XPathFactory

// Extension function to parse XML string into a Document
fun String.parseXml(): Document {
    return DocumentBuilderFactory
        .newInstance()
        .newDocumentBuilder()
        .parse(InputSource(StringReader(this)))
}

// Extension function to evaluate XPath expression
fun Document.evaluateXPath(expression: String): String? {
    return XPathFactory
        .newInstance()
        .newXPath()
        .evaluate(expression, this)
}

val client = OkHttpClient()
val request = Request.Builder().url("https://www.w3schools.com/xml/note.xml").build();
val response = client.newCall(request).execute()
val responseBody = response.body?.string()
println("Response body: $responseBody")

// Evaluate XPath expression
val xpathExpression = ".//to"
val result = responseBody?.parseXml()?.evaluateXPath(xpathExpression)
println("XPath result: $result")