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126 lines
3.7 KiB
Java
126 lines
3.7 KiB
Java
/*
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* ====================================================================
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*
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*/
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package ch.boye.httpclientandroidlib.entity;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import ch.boye.httpclientandroidlib.annotation.NotThreadSafe;
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import ch.boye.httpclientandroidlib.util.Args;
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import ch.boye.httpclientandroidlib.util.Asserts;
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/**
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* A generic streamed, non-repeatable entity that obtains its content
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* from an {@link InputStream}.
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*
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* @since 4.0
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*/
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@NotThreadSafe
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public class BasicHttpEntity extends AbstractHttpEntity {
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private InputStream content;
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private long length;
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/**
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* Creates a new basic entity.
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* The content is initially missing, the content length
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* is set to a negative number.
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*/
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public BasicHttpEntity() {
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super();
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this.length = -1;
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}
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public long getContentLength() {
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return this.length;
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}
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/**
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* Obtains the content, once only.
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*
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* @return the content, if this is the first call to this method
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* since {@link #setContent setContent} has been called
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*
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* @throws IllegalStateException
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* if the content has not been provided
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*/
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public InputStream getContent() throws IllegalStateException {
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Asserts.check(this.content != null, "Content has not been provided");
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return this.content;
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}
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/**
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* Tells that this entity is not repeatable.
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*
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* @return <code>false</code>
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*/
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public boolean isRepeatable() {
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return false;
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}
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/**
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* Specifies the length of the content.
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*
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* @param len the number of bytes in the content, or
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* a negative number to indicate an unknown length
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*/
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public void setContentLength(final long len) {
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this.length = len;
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}
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/**
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* Specifies the content.
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*
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* @param instream the stream to return with the next call to
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* {@link #getContent getContent}
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*/
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public void setContent(final InputStream instream) {
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this.content = instream;
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}
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public void writeTo(final OutputStream outstream) throws IOException {
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Args.notNull(outstream, "Output stream");
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final InputStream instream = getContent();
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try {
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int l;
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final byte[] tmp = new byte[OUTPUT_BUFFER_SIZE];
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while ((l = instream.read(tmp)) != -1) {
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outstream.write(tmp, 0, l);
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}
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} finally {
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instream.close();
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}
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}
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public boolean isStreaming() {
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return this.content != null;
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}
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}
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