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127 lines
4.1 KiB
127 lines
4.1 KiB
// HttpResponse.java
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// (C) 2008 by Daniel Raap; danielr@users.berlios.de
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// first published 2.4.2008 on http://yacy.net
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//
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// This is a part of YaCy, a peer-to-peer based web search engine
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//
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// $LastChangedDate: 2008-03-14 01:16:04 +0100 (Fr, 14 Mrz 2008) $
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// $LastChangedRevision: 4558 $
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// $LastChangedBy: orbiter $
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//
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// LICENSE
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package de.anomic.http;
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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 java.io.OutputStreamWriter;
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import java.io.UnsupportedEncodingException;
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import java.io.Writer;
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import de.anomic.tools.StreamTools;
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/**
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* @author daniel
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*
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*/
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public interface HttpResponse {
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/**
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* returns the header as {@link de.anomic.http.httpHeader}
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* @return
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*/
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public abstract httpHeader getResponseHeader();
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/**
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* get the body of the response
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* @return the data
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* @throws IOException
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*/
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public abstract byte[] getData() throws IOException;
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/**
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* returns a stream to read the body of the response
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*
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* <strong>Important: When done call <code>closeStream()</code>!</strong>
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* @return
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* @throws IOException
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*/
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public abstract InputStream getDataAsStream() throws IOException;
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/**
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* closes the input stream
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*/
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public abstract void closeStream();
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/**
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* "Statuscode SPACE Statusmessage"
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* @return the statusLine
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*/
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public abstract String getStatusLine();
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/**
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* the status code of this response
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* @return
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* @ensure result >= 100 && result <= 999 (is a 3-digit integer)
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*/
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public abstract int getStatusCode();
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/**
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* HTTP version of the response
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* @return
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*/
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public abstract String getHttpVer();
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/**
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* save a response to some storage
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* @author daniel
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*
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*/
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public static class Saver {
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/**
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* copies the body of the response accordingly to hfos to the destination
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* @param res
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* @param hfos OutputStream (raw bytes) or Writer (decode to characters)
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* @param byteStream additional OutputStream where data is stored
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* @throws IOException
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* @throws UnsupportedEncodingException
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*/
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public static void writeContent(HttpResponse res, Object hfos, OutputStream byteStream) throws IOException,
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UnsupportedEncodingException {
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try {
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InputStream data = res.getDataAsStream();
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if (hfos instanceof OutputStream) {
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OutputStream[] streams = (byteStream == null ? new OutputStream[] { (OutputStream) hfos }
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: new OutputStream[] { (OutputStream) hfos, byteStream });
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StreamTools.copyToStreams(data, streams);
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} else if (hfos instanceof Saver) {
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String charSet = httpHeader.getCharSet(res.getResponseHeader());
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Writer[] writers = (byteStream == null ? new Writer[] { (Writer) hfos } : new Writer[] { (Writer) hfos,
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new OutputStreamWriter(byteStream, charSet) });
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StreamTools.copyToWriters(data, writers, charSet);
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} else {
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throw new IOException("cannot save data: hfos-type ("+ hfos.getClass().toString() +") not supported!");
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}
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} finally {
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res.closeStream();
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}
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}
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}
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} |