com.mashape.unirest.http.utils.ResponseUtils Maven / Gradle / Ivy

Go to download
package com.mashape.unirest.http.utils;

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;

import org.apache.http.Header;

public class ResponseUtils {

	 private static final Pattern charsetPattern = Pattern.compile("(?i)\\bcharset=\\s*\"?([^\\s;\"]*)");

	  /**
	   * Parse out a charset from a content type header.
	   * 
	   * @param contentType
	   *            e.g. "text/html; charset=EUC-JP"
	   * @return "EUC-JP", or null if not found. Charset is trimmed and
	   *         uppercased.
	   */
	  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(Header contentEncoding) {
			if (contentEncoding != null) {
				String value = contentEncoding.getValue();
				if (value != null && "gzip".equals(value.toLowerCase().trim())) {
					return true;
				}
			}
			return false;
		}

}