| /* |
| * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/util/EntityUtils.java $ |
| * $Revision: 569637 $ |
| * $Date: 2007-08-25 00:36:59 -0700 (Sat, 25 Aug 2007) $ |
| * |
| * ==================================================================== |
| * 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| |
| package org.apache.http.util; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.Reader; |
| |
| import org.apache.http.HeaderElement; |
| import org.apache.http.HttpEntity; |
| import org.apache.http.NameValuePair; |
| import org.apache.http.ParseException; |
| import org.apache.http.protocol.HTTP; |
| |
| /** |
| * Static helpers for dealing with {@link HttpEntity entities}. |
| * |
| * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> |
| * |
| * @version $Revision: 569637 $ |
| * |
| * @since 4.0 |
| */ |
| public final class EntityUtils { |
| |
| /** Disabled default constructor. */ |
| private EntityUtils() { |
| } |
| |
| public static byte[] toByteArray(final HttpEntity entity) throws IOException { |
| if (entity == null) { |
| throw new IllegalArgumentException("HTTP entity may not be null"); |
| } |
| InputStream instream = entity.getContent(); |
| if (instream == null) { |
| return new byte[] {}; |
| } |
| if (entity.getContentLength() > Integer.MAX_VALUE) { |
| throw new IllegalArgumentException("HTTP entity too large to be buffered in memory"); |
| } |
| int i = (int)entity.getContentLength(); |
| if (i < 0) { |
| i = 4096; |
| } |
| ByteArrayBuffer buffer = new ByteArrayBuffer(i); |
| try { |
| byte[] tmp = new byte[4096]; |
| int l; |
| while((l = instream.read(tmp)) != -1) { |
| buffer.append(tmp, 0, l); |
| } |
| } finally { |
| instream.close(); |
| } |
| return buffer.toByteArray(); |
| } |
| |
| public static String getContentCharSet(final HttpEntity entity) |
| throws ParseException { |
| |
| if (entity == null) { |
| throw new IllegalArgumentException("HTTP entity may not be null"); |
| } |
| String charset = null; |
| if (entity.getContentType() != null) { |
| HeaderElement values[] = entity.getContentType().getElements(); |
| if (values.length > 0) { |
| NameValuePair param = values[0].getParameterByName("charset"); |
| if (param != null) { |
| charset = param.getValue(); |
| } |
| } |
| } |
| return charset; |
| } |
| |
| public static String toString( |
| final HttpEntity entity, final String defaultCharset) throws IOException, ParseException { |
| if (entity == null) { |
| throw new IllegalArgumentException("HTTP entity may not be null"); |
| } |
| InputStream instream = entity.getContent(); |
| if (instream == null) { |
| return ""; |
| } |
| if (entity.getContentLength() > Integer.MAX_VALUE) { |
| throw new IllegalArgumentException("HTTP entity too large to be buffered in memory"); |
| } |
| int i = (int)entity.getContentLength(); |
| if (i < 0) { |
| i = 4096; |
| } |
| String charset = getContentCharSet(entity); |
| if (charset == null) { |
| charset = defaultCharset; |
| } |
| if (charset == null) { |
| charset = HTTP.DEFAULT_CONTENT_CHARSET; |
| } |
| Reader reader = new InputStreamReader(instream, charset); |
| CharArrayBuffer buffer = new CharArrayBuffer(i); |
| try { |
| char[] tmp = new char[1024]; |
| int l; |
| while((l = reader.read(tmp)) != -1) { |
| buffer.append(tmp, 0, l); |
| } |
| } finally { |
| reader.close(); |
| } |
| return buffer.toString(); |
| } |
| |
| public static String toString(final HttpEntity entity) |
| throws IOException, ParseException { |
| return toString(entity, null); |
| } |
| |
| } |