/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.texera.amber.operator.source.fetcher

import java.io.InputStream
import java.net.URL

object URLFetchUtil {
  def getInputStreamFromURL(urlObj: URL, retries: Int = 5): Option[InputStream] = {
    for (_ <- 0 until retries) {
      val result =
        try {
          val request = urlObj.openConnection()
          request.setRequestProperty("User-Agent", RandomUserAgent.getRandomUserAgent)
          Some(request.getInputStream)
        } catch {
          case t: Throwable => //re-try
            None
        }
      if (result.isDefined) {
        return result
      }
    }
    None
  }
}
