Scala - HTTPComponents client example

http-client-example.scala

package com.semperos.example


import org.apache.http.impl.client.{BasicResponseHandler, DefaultHttpClient}
import org.apache.http.{HttpRequest, HttpRequestInterceptor}
import org.apache.http.client.methods.HttpGet
import org.apache.http.protocol.HttpContext
import org.apache.log4j.Logger

/**
 * HTTP request handling
 */

object Http {
  val logger = Logger.getRootLogger

  def simpleRequest(url: String): String = {
    val client = new DefaultHttpClient

    simpleRequest(client, url)
  }

  def simpleRequest(client: DefaultHttpClient, url: String): String = {
    try {
      val get = new HttpGet(url)

      logger.info("executing request " + get.getURI);

      val responseHandler = new BasicResponseHandler
      client.execute(get, responseHandler)
    } finally {
      client.getConnectionManager.shutdown()
    }
  }

  def requestWithHeaders(url: String, headers: Map[String,String]): String = {
    val client = new DefaultHttpClient

    try {
      client.addRequestInterceptor(new HttpRequestInterceptor {
        def process(request: HttpRequest, context: HttpContext) {
          for ((k,v) <- headers) {
            request.addHeader(k, v)
          }
        }
      })
      simpleRequest(client, url)
    }
  }

  def main(args: Array[String]) {
    val response = requestWithHeaders("http://tools.ietf.org/rfc/rfc3629.txt", Map("SUBJECT_DN" -> "TEST_DN"))
    println(response)
  }
}