/**
* 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.jooby.internal;
import java.util.Iterator;
import java.util.function.BiFunction;
import org.jooby.Err;
import org.jooby.Status;
import com.google.common.base.Splitter;
import javaslang.Tuple;
import javaslang.Tuple2;
public class ByteRange {
private static final String BYTES_EQ = "bytes=";
public static Tuple2<Long, Long> parse(final String value) {
if (!value.startsWith(BYTES_EQ)) {
throw new Err(Status.REQUESTED_RANGE_NOT_SATISFIABLE, value);
}
BiFunction<String, Integer, Long> number = (it, offset) -> {
try {
return Long.parseLong(it.substring(offset));
} catch (NumberFormatException | IndexOutOfBoundsException x) {
throw new Err(Status.REQUESTED_RANGE_NOT_SATISFIABLE, value);
}
};
Iterator<String> ranges = Splitter.on(',')
.trimResults()
.omitEmptyStrings()
.split(value.substring(BYTES_EQ.length()))
.iterator();
if (ranges.hasNext()) {
String range = ranges.next();
int dash = range.indexOf('-');
if (dash == 0) {
return Tuple.of(-1L, number.apply(range, 1));
} else if (dash > 0) {
Long start = number.apply(range.substring(0, dash), 0);
int endidx = dash + 1;
Long end = endidx < range.length() ? number.apply(range, endidx) : -1L;
return Tuple.of(start, end);
}
}
throw new Err(Status.REQUESTED_RANGE_NOT_SATISFIABLE, value);
}
}