io.joshworks.snappy.parser.ParserUtil Maven / Gradle / Ivy
/*
* Copyright 2017 Josue Gontijo
*
* Licensed 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 io.joshworks.snappy.parser;
import io.undertow.util.HeaderValues;
import io.undertow.util.Headers;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class ParserUtil {
private static final Pattern charsetPattern = Pattern.compile("(?i)\\bcharset=\\s*\"?([^\\s;\"]*)");
public static String getCharsetFromContentType(String contentType) {
if (contentType == null)
return null;
Matcher m = charsetPattern.matcher(contentType);
if (m.find()) {
return m.group(1).trim().toUpperCase();
}
return null;
}
public static byte[] getBytes(InputStream is) throws IOException {
int len;
int size = 1024;
byte[] buf;
if (is instanceof ByteArrayInputStream) {
size = is.available();
buf = new byte[size];
len = is.read(buf, 0, size);
} else {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
buf = new byte[size];
while ((len = is.read(buf, 0, size)) != -1)
bos.write(buf, 0, len);
buf = bos.toByteArray();
}
return buf;
}
public static boolean isGzipped(HeaderValues contentEncoding) {
if (contentEncoding == null) {
return false;
}
return contentEncoding.stream().anyMatch(hv -> Headers.GZIP.toString().equals(hv.toLowerCase().trim()));
}
}