http://hc.apache.org/httpcomponents-core-ga: Apache HttpComponents Core (blocking I/O) (The Apache Software Foundation)
  • Julius Davies
  • Andrea Selva
  • Steffen Pingel
  • Quintin Beukes
  • Marc Beyerle
  • James Abley
  • Michajlo Matijkiw 
/*
 * ====================================================================
 * 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.impl.entity;

import java.io.IOException;

import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpException;
import org.apache.http.HttpMessage;
import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.annotation.Contract;
import org.apache.http.entity.BasicHttpEntity;
import org.apache.http.entity.ContentLengthStrategy;
import org.apache.http.impl.io.ChunkedInputStream;
import org.apache.http.impl.io.ContentLengthInputStream;
import org.apache.http.impl.io.IdentityInputStream;
import org.apache.http.io.SessionInputBuffer;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.Args;


HTTP entity deserializer.


This entity deserializer supports "chunked" and "identitiy" transfer-coding
and content length delimited content.

 This class relies on a specific implementation of ContentLengthStrategy to determine the content length or transfer encoding of the entity. 
 This class generates an instance of HttpEntity based on properties of the message. The content of the entity will be decoded transparently for the consumer. 
Since:4.0
Deprecated:(4.3) use BHttpConnectionBase
/**
 * HTTP entity deserializer.
 * <p>
 * This entity deserializer supports "chunked" and "identitiy" transfer-coding
 * and content length delimited content.
 * <p>
 * This class relies on a specific implementation of
 * {@link ContentLengthStrategy} to determine the content length or transfer
 * encoding of the entity.
 * <p>
 * This class generates an instance of {@link HttpEntity} based on
 * properties of the message. The content of the entity will be decoded
 * transparently for the consumer.
 *
 * @since 4.0
 *
 * @deprecated (4.3) use {@link org.apache.http.impl.BHttpConnectionBase}
 */
@Contract(threading = ThreadingBehavior.IMMUTABLE_CONDITIONAL)
@Deprecated
public class EntityDeserializer {

    private final ContentLengthStrategy lenStrategy;

    public EntityDeserializer(final ContentLengthStrategy lenStrategy) {
        super();
        this.lenStrategy = Args.notNull(lenStrategy, "Content length strategy");
    }

    
Creates a BasicHttpEntity based on properties of the given message. The content of the entity is created by wrapping SessionInputBuffer with a content decoder depending on the transfer mechanism used by the message. 
 This method is called by the public deserialize(SessionInputBuffer, HttpMessage). 
Params:
  • inBuffer – the session input buffer.
  • message – the message.
Throws:
Returns:HTTP entity.
/**
     * Creates a {@link BasicHttpEntity} based on properties of the given
     * message. The content of the entity is created by wrapping
     * {@link SessionInputBuffer} with a content decoder depending on the
     * transfer mechanism used by the message.
     * <p>
     * This method is called by the public
     * {@link #deserialize(SessionInputBuffer, HttpMessage)}.
     *
     * @param inBuffer the session input buffer.
     * @param message the message.
     * @return HTTP entity.
     * @throws HttpException in case of HTTP protocol violation.
     * @throws IOException in case of an I/O error.
     */
    protected BasicHttpEntity doDeserialize(
            final SessionInputBuffer inBuffer,
            final HttpMessage message) throws HttpException, IOException {
        final BasicHttpEntity entity = new BasicHttpEntity();

        final long len = this.lenStrategy.determineLength(message);
        if (len == ContentLengthStrategy.CHUNKED) {
            entity.setChunked(true);
            entity.setContentLength(-1);
            entity.setContent(new ChunkedInputStream(inBuffer));
        } else if (len == ContentLengthStrategy.IDENTITY) {
            entity.setChunked(false);
            entity.setContentLength(-1);
            entity.setContent(new IdentityInputStream(inBuffer));
        } else {
            entity.setChunked(false);
            entity.setContentLength(len);
            entity.setContent(new ContentLengthInputStream(inBuffer, len));
        }

        final Header contentTypeHeader = message.getFirstHeader(HTTP.CONTENT_TYPE);
        if (contentTypeHeader != null) {
            entity.setContentType(contentTypeHeader);
        }
        final Header contentEncodingHeader = message.getFirstHeader(HTTP.CONTENT_ENCODING);
        if (contentEncodingHeader != null) {
            entity.setContentEncoding(contentEncodingHeader);
        }
        return entity;
    }

    
Creates an HttpEntity based on properties of the given message. The content of the entity is created by wrapping SessionInputBuffer with a content decoder depending on the transfer mechanism used by the message. 

The content of the entity is NOT retrieved by this method.

Params:
  • inBuffer – the session input buffer.
  • message – the message.
Throws:
Returns:HTTP entity.
/**
     * Creates an {@link HttpEntity} based on properties of the given message.
     * The content of the entity is created by wrapping
     * {@link SessionInputBuffer} with a content decoder depending on the
     * transfer mechanism used by the message.
     * <p>
     * The content of the entity is NOT retrieved by this method.
     *
     * @param inBuffer the session input buffer.
     * @param message the message.
     * @return HTTP entity.
     * @throws HttpException in case of HTTP protocol violation.
     * @throws IOException in case of an I/O error.
     */
    public HttpEntity deserialize(
            final SessionInputBuffer inBuffer,
            final HttpMessage message) throws HttpException, IOException {
        Args.notNull(inBuffer, "Session input buffer");
        Args.notNull(message, "HTTP message");
        return doDeserialize(inBuffer, message);
    }

}