How to send umlauts with HTTPBuilder

Question

How can I make REST requests with HTTPBuilder that contain a german umlaut? If I try to do the same request using Postman it works. As soon as I try to do it with groovy HTTPBuilder using Scriptrunner for Jira, I always get "Bad Request"

Is there a way to be able to send the umlaut?

The code I am trying to use:

def http = new HTTPBuilder(<Endpoint>)
def token = ""
def zulieferer = Assets.search("objectSchemaId = 5 AND objectType = Lieferant")
zulieferer.each { asset ->
    try {
        def name = asset.getName()
        def kundennummer = asset.getString("Kundennummer")
        def kreditorNummer = asset.getString("Kreditor-Nummer")
        def strasse = asset.getString("Straße")
        def plz = asset.getString("PLZ")
        def ort = asset.getString("Ort")
        def fon = asset.getString("Telefon")
        def hotlineFon = asset.getString("Hotline Telefon")
        def hotlineMail = asset.getString("Hotline Mail")
        def homepage = asset.getString("Homepage")
        def consultant = asset.getString("Consultant")
        def sales = asset.getString("Sales")

        if (name != null) {
            name.replace("–", "-")
        }
        if (kundennummer != null) {
            kundennummer.replace("–", "-")
        }
        if (kreditorNummer != null) {
            kreditorNummer.replace("–", "-")
        }
        if (strasse != null) {
            strasse.replace("–", "-")
        }
        if (plz != null) {
            plz.replace("–", "-")
        }
        if (ort != null) {
            ort.replace("–", "-")
        }
        if (fon != null) {
            fon.replace("–", "-")
        }
        if (hotlineFon != null) {
            hotlineFon.replace("–", "-")
        }
        if (hotlineMail != null) {
            hotlineMail.replace("–", "-")
        }
        if (homepage != null) {
            homepage.replace("–", "-")
        }
        if (consultant != null) {
            consultant.replace("–", "-")
        }
        if (sales != null) {
            sales.replace("–", "-")
        }

        def contactString = "<p>Kundennummer: ${kundennummer}</p>\n" +
                        "<p>Kreditor-Nummer: ${kreditorNummer}</p>\n" +
                        "<p>Strasse: ${strasse}</p>\n" +
                        "<p>PLZ: ${plz}</p>\n" +
                        "<p>Ort: ${ort}</p>\n" +
                        "<p>Telefon: ${fon}</p>\n" +
                        "<p>Hotline Telefon: ${hotlineFon}</p>\n" +
                        "<p>Hotline Mail: ${hotlineMail}</p>\n" +
                        "<p>Homepage: ${homepage}</p>\n" +
                        "<p>Consultant: ${consultant}</p>\n" +
                        "<p>Sales: ${sales}</p>"

         try {
            def jsonBody = [tenant: 1, name: name, contact: contactString, resourcetype: "ThirdParty"]
            http.request(POST, JSON) { req ->
                headers.'Content-Type' = 'application/json'
                headers.'Authorization' = "Bearer ${token}"
                body = jsonBody
                response.success = { resp, json ->
                    // log.warn(json)
                }
            }
        } catch (Exception ex) {
            log.warn("Asset: ${name} konnte nicht angelegt werden | " + ex)
        }

Answer 1

just add http.encoders.charset = java.nio.charset.StandardCharsets.UTF_8 to force UTF-8 encoding

the following code sends data to a test server and receives back body:

@Grab(group='org.codehaus.groovy.modules.http-builder', module='http-builder', version='0.7.1')
import groovyx.net.http.HTTPBuilder
import groovyx.net.http.Method
import groovyx.net.http.ContentType


def http = new HTTPBuilder("http://httpbin.org/post")
http.encoders.charset = java.nio.charset.StandardCharsets.UTF_8
def contactString = "<p>Wörter werden großgeschrieben</p>"
def name = 'hält'
def jsonBody = [name: name, contact: contactString]
http.request(Method.POST, ContentType.JSON) { req ->
    headers.'Content-Type' = 'application/json'
    body = jsonBody
    response.success = { resp, json ->
        println json.data
        //println "json=${new groovy.json.JsonBuilder(json).toPrettyString()}"
    }
}

the code above prints:

{"name":"hält","contact":"<p>Wörter werden großgeschrieben<\/p>"}

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if you have java.lang.NoClassDefFoundError: groovy/util/slurpersupport/GPathResult consider this: https://stackoverflow.com/a/71923258/1276664