using groovy http-builder in preemptive mode

When using groovy's http-builder with basic authentication the default behavior is to send an unauthenticated request first and resend the request with credentials after receiving a 401 i开发者_如何学Cn the first place. Apache's Httpclient offers preemptive authentication to send the credentials directly on the first request. How can I use preemptive auth in Groovy's http-builder? Any code examples are appreciated.

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You can also solve it groovy style with

http = new RESTClient('http://awesomeUrl/')
http.headers['Authorization'] = 'Basic '+"myUsername:myPassword".getBytes('iso-8859-1').encodeBase64()

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Based on a JIRA issue you can do something like that :

def http = new RESTClient('http://awesomeUrl/')

http.client.addRequestInterceptor(new HttpRequestInterceptor() {
    void process(HttpRequest httpRequest, HttpContext httpContext) {
        httpRequest.addHeader('Authorization', 'Basic ' + 'myUsername:myPassword'.bytes.encodeBase64().toString())
    }
})

def response = http.get(path: "aResource")

println response.data.text

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Used following with Jenkins.

def accessToken = "ACCESS_TOKEN".bytes.encodeBase64().toString()
def req = new URL("https://raw.githubusercontent.com/xxxx/something/hosts").openConnection();
req.setRequestProperty("Authorization", "Basic " + accessToken)
def content = req.getInputStream().getText()