76 lines
2.7 KiB
Java
76 lines
2.7 KiB
Java
/* ========================================================================
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* PlantUML : a free UML diagram generator
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* ========================================================================
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*
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* Project Info: http://plantuml.sourceforge.net
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*
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* This file is part of PlantUML.
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*
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* PlantUML is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* PlantUML distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*/
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package net.sourceforge.plantuml.servlet;
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import java.io.IOException;
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import javax.imageio.IIOException;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import net.sourceforge.plantuml.FileFormat;
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import net.sourceforge.plantuml.servlet.utility.UmlExtractor;
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/**
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* Common service servlet to produce diagram from compressed UML source contained in the end part of the requested URI.
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*/
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@SuppressWarnings("serial")
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public abstract class UmlDiagramService extends HttpServlet {
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@Override
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public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
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// build the UML source from the compressed request parameter
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String uml = UmlExtractor.getUmlSource(getSource(request.getRequestURI()));
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// generate the response
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DiagramResponse dr = new DiagramResponse(response, getOutputFormat());
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try {
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dr.sendDiagram(uml);
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} catch (IIOException iioe) {
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// Browser has closed the connection, so the HTTP OutputStream is closed
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// Silently catch the exception to avoid annoying log
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}
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dr = null;
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}
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/**
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* Extracts the compressed UML source from the HTTP URI.
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*
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* @param uri
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* the complete URI as returned by request.getRequestURI()
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* @return the compressed UML source
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*/
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abstract public String getSource(String uri);
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/**
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* Gives the wished output format of the diagram. This value is used by the DiagramResponse class.
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*
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* @return the format
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*/
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abstract public FileFormat getOutputFormat();
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}
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