118 lines
4.1 KiB
Java
118 lines
4.1 KiB
Java
/* ========================================================================
|
|
* PlantUML : a free UML diagram generator
|
|
* ========================================================================
|
|
*
|
|
* Project Info: https://plantuml.com
|
|
*
|
|
* This file is part of PlantUML.
|
|
*
|
|
* PlantUML is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* PlantUML distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
|
|
* License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
|
|
* USA.
|
|
*/
|
|
package net.sourceforge.plantuml.servlet;
|
|
|
|
import java.io.BufferedReader;
|
|
import java.io.IOException;
|
|
import java.io.InputStream;
|
|
import java.io.InputStreamReader;
|
|
import java.net.URL;
|
|
import java.util.regex.Matcher;
|
|
import java.util.regex.Pattern;
|
|
|
|
import javax.servlet.ServletException;
|
|
import javax.servlet.http.HttpServlet;
|
|
import javax.servlet.http.HttpServletRequest;
|
|
import javax.servlet.http.HttpServletResponse;
|
|
|
|
import net.sourceforge.plantuml.FileFormat;
|
|
import net.sourceforge.plantuml.FileFormatOption;
|
|
import net.sourceforge.plantuml.SourceStringReader;
|
|
|
|
/**
|
|
* Proxy servlet of the webapp.
|
|
* This servlet retrieves the diagram source of a web resource (web html page)
|
|
* and renders it.
|
|
*/
|
|
@SuppressWarnings("SERIAL")
|
|
public class OldProxyServlet extends HttpServlet {
|
|
|
|
private static final Pattern PROXY_PATTERN = Pattern.compile("/\\w+/proxy/((\\d+)/)?((\\w+)/)?(https?://.*)");
|
|
private String format;
|
|
|
|
@Override
|
|
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
|
|
final String uri = request.getRequestURI();
|
|
|
|
// Check if the src URL is valid
|
|
Matcher proxyMatcher = PROXY_PATTERN.matcher(uri);
|
|
if (!proxyMatcher.matches()) {
|
|
// Bad URI format.
|
|
response.setStatus(400);
|
|
return;
|
|
}
|
|
|
|
String num = proxyMatcher.group(2); // Optional number of the diagram source
|
|
format = proxyMatcher.group(4); // Expected format of the generated diagram
|
|
String sourceURL = proxyMatcher.group(5);
|
|
handleImageProxy(response, num, sourceURL);
|
|
}
|
|
|
|
private void handleImageProxy(HttpServletResponse response, String num, String source) throws IOException {
|
|
SourceStringReader reader = new SourceStringReader(getSource(source));
|
|
int n = num == null ? 0 : Integer.parseInt(num);
|
|
|
|
FileFormat fileFormat = getOutputFormat();
|
|
response.addHeader("Content-Type", fileFormat.getMimeType());
|
|
reader.outputImage(response.getOutputStream(), n, new FileFormatOption(fileFormat, false));
|
|
}
|
|
|
|
private String getSource(final String uri) throws IOException {
|
|
final URL url = new URL(uri);
|
|
try (
|
|
InputStream responseStream = url.openStream();
|
|
InputStreamReader isr = new InputStreamReader(responseStream);
|
|
BufferedReader br = new BufferedReader(isr);
|
|
) {
|
|
String line;
|
|
StringBuffer sb = new StringBuffer();
|
|
while ((line = br.readLine()) != null) {
|
|
sb.append(line);
|
|
sb.append("\n");
|
|
}
|
|
return sb.toString().trim();
|
|
}
|
|
}
|
|
|
|
private FileFormat getOutputFormat() {
|
|
if (format == null) {
|
|
return FileFormat.PNG;
|
|
}
|
|
if (format.equals("svg")) {
|
|
return FileFormat.SVG;
|
|
}
|
|
if (format.equals("eps")) {
|
|
return FileFormat.EPS;
|
|
}
|
|
if (format.equals("epstext")) {
|
|
return FileFormat.EPS_TEXT;
|
|
}
|
|
if (format.equals("txt")) {
|
|
return FileFormat.ATXT;
|
|
}
|
|
return FileFormat.PNG;
|
|
}
|
|
|
|
}
|