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Code Issues Releases Wiki Activity

[FEATURE] Proxy redesign, first step

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This commit is contained in:
maximesinclair 2013-11-25 22:35:58 +01:00
parent 76ad7acd21
commit 7c8f361826
6 changed files with 221 additions and 36 deletions
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119
src/main/java/net/sourceforge/plantuml/servlet/OldProxyServlet.java Normal file
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@ -0,0 +1,119 @@
/* ========================================================================
* PlantUML : a free UML diagram generator
* ========================================================================
*
* Project Info: http://plantuml.sourceforge.net
*
* 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.IOException;
import java.net.URL;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import HTTPClient.CookieModule;
import HTTPClient.HTTPConnection;
import HTTPClient.HTTPResponse;
import HTTPClient.ModuleException;
import HTTPClient.ParseException;
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 proxyPattern = Pattern.compile("/\\w+/proxy/((\\d+)/)?((\\w+)/)?(http://.*)");
private String format;
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
final String uri = request.getRequestURI();
Matcher proxyMatcher = proxyPattern.matcher(uri);
if (proxyMatcher.matches()) {
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);
} else {
request.setAttribute("net.sourceforge.plantuml.servlet.decoded", "ERROR Invalid proxy syntax : " + uri);
request.removeAttribute("net.sourceforge.plantuml.servlet.encoded");
// forward to index.jsp
RequestDispatcher dispatcher = request.getRequestDispatcher("/index.jsp");
dispatcher.forward(request, response);
}
}
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);
reader.generateImage(response.getOutputStream(), n, new FileFormatOption(getOutputFormat(), false));
}
private String getSource(String uri) throws IOException {
CookieModule.setCookiePolicyHandler(null);
final Pattern p = Pattern.compile("http://[^/]+(/?.*)");
final Matcher m = p.matcher(uri);
if (m.find() == false) {
throw new IOException(uri);
}
final URL url = new URL(uri);
final HTTPConnection httpConnection = new HTTPConnection(url);
try {
final HTTPResponse resp = httpConnection.Get(m.group(1));
return resp.getText();
} catch (ModuleException e) {
throw new IOException(e.toString());
} catch (ParseException e) {
throw new IOException(e.toString());
}
}
private FileFormat getOutputFormat() {
if (format == null) {
return FileFormat.PNG;
}
if (format.equals("svg")) {
return FileFormat.SVG;
}
if (format.equals("txt")) {
return FileFormat.ATXT;
}
return FileFormat.PNG;
}
}

32
src/main/java/net/sourceforge/plantuml/servlet/ProxyServlet.java
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@ -28,7 +28,6 @@ import java.net.URL;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
@ -52,34 +51,19 @@ import net.sourceforge.plantuml.SourceStringReader;
@SuppressWarnings("serial")
public class ProxyServlet extends HttpServlet {
private static final Pattern proxyPattern = Pattern.compile("/\\w+/proxy/((\\d+)/)?((\\w+)/)?(http://.*)");
private String format;
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
final String uri = request.getRequestURI();
Matcher proxyMatcher = proxyPattern.matcher(uri);
if (proxyMatcher.matches()) {
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);
} else {
request.setAttribute("net.sourceforge.plantuml.servlet.decoded", "ERROR Invalid proxy syntax : " + uri);
request.removeAttribute("net.sourceforge.plantuml.servlet.encoded");
// forward to index.jsp
RequestDispatcher dispatcher = request.getRequestDispatcher("/index.jsp");
dispatcher.forward(request, response);
}
}
private void handleImageProxy(HttpServletResponse response, String num, String source) throws IOException {
final String source = request.getParameter("src");
final String index = request.getParameter("idx");
// TODO Check if the src URL is valid
// generate the response
SourceStringReader reader = new SourceStringReader(getSource(source));
int n = num == null ? 0 : Integer.parseInt(num);
int n = index == null ? 0 : Integer.parseInt(index);
reader.generateImage(response.getOutputStream(), n, new FileFormatOption(getOutputFormat(), false));
}
@ -111,7 +95,7 @@ public class ProxyServlet extends HttpServlet {
return FileFormat.SVG;
}
if (format.equals("txt")) {
return FileFormat.ATXT;
return FileFormat.UTXT;
}
return FileFormat.PNG;
}

10
src/main/webapp/WEB-INF/web.xml
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@ -31,6 +31,10 @@
<servlet-name>proxyservlet</servlet-name>
<servlet-class>net.sourceforge.plantuml.servlet.ProxyServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>oldproxyservlet</servlet-name>
<servlet-class>net.sourceforge.plantuml.servlet.OldProxyServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>mapservlet</servlet-name>
<servlet-class>net.sourceforge.plantuml.servlet.MapServlet</servlet-class>
@ -69,9 +73,13 @@
<url-pattern>/start/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>proxyservlet</servlet-name>
<servlet-name>oldproxyservlet</servlet-name>
<url-pattern>/proxy/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>proxyservlet</servlet-name>
<url-pattern>/proxy</url-pattern>
</servlet-mapping>
<error-page>
<exception-type>java.lang.Throwable</exception-type>
<location>/error.jsp</location>

9
src/main/webapp/resource/test2diagrams.txt Normal file
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@ -0,0 +1,9 @@
This file is used by the TestProxy unit test. It contains 2 diagrams description.
@startuml
Bob -> Alice : hello
@enduml
@startuml
version
@enduml

67
src/test/java/net/sourceforge/plantuml/servlet/TestOldProxy.java Normal file
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@ -0,0 +1,67 @@
package net.sourceforge.plantuml.servlet;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import com.meterware.httpunit.GetMethodWebRequest;
import com.meterware.httpunit.WebConversation;
import com.meterware.httpunit.WebForm;
import com.meterware.httpunit.WebRequest;
import com.meterware.httpunit.WebResponse;
public class TestOldProxy extends WebappTestCase {
/**
* Verifies the proxified reception of the default Bob and Alice diagram
*/
public void testDefaultProxy() throws Exception {
WebConversation conversation = new WebConversation();
WebRequest request = new GetMethodWebRequest(getServerUrl() + "proxy/" + getServerUrl() + "welcome");
WebResponse response = conversation.getResource(request);
// Analyze response
// Verifies the Content-Type header
// assertEquals( "Response content type is not PNG", "image/png", response.getContentType());
// Get the image and verify its size (~2000 bytes)
InputStream responseStream = response.getInputStream();
ByteArrayOutputStream imageStream = new ByteArrayOutputStream();
byte[] buf = new byte[1024];
int n = 0;
while ((n = responseStream.read(buf)) != -1) {
imageStream.write(buf, 0, n);
}
imageStream.close();
responseStream.close();
byte[] inMemoryImage = imageStream.toByteArray();
int diagramLen = inMemoryImage.length;
assertTrue(diagramLen > 1500);
assertTrue(diagramLen < 2500);
}
public void testProxyWithFormat() throws Exception {
WebConversation conversation = new WebConversation();
WebRequest request = new GetMethodWebRequest(getServerUrl() + "proxy/svg/" + getServerUrl() + "welcome");
WebResponse response = conversation.getResource(request);
// Analyze response
// Verifies the Content-Type header
// TODO assertEquals( "Response content type is not SVG", "image/svg+xml", response.getContentType());
// Get the content and verify its size
String diagram = response.getText();
int diagramLen = diagram.length();
assertTrue(diagramLen > 1000);
assertTrue(diagramLen < 3000);
}
/**
* Verifies that the HTTP header of a diagram incites the browser to cache it.
*/
public void testInvalidUrl() throws Exception {
WebConversation conversation = new WebConversation();
// Try to proxify an invalid address
WebRequest request = new GetMethodWebRequest(getServerUrl() + "proxy/invalidURL");
WebResponse response = conversation.getResource(request);
// Analyze response, it must be the empty form
// Verifies the Content-Type header
assertEquals("Response content type is not HTML", "text/html", response.getContentType());
WebForm forms[] = response.getForms();
assertEquals(2, forms.length);
}
}

20
src/test/java/net/sourceforge/plantuml/servlet/TestProxy.java
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@ -5,7 +5,6 @@ import java.io.InputStream;
import com.meterware.httpunit.GetMethodWebRequest;
import com.meterware.httpunit.WebConversation;
import com.meterware.httpunit.WebForm;
import com.meterware.httpunit.WebRequest;
import com.meterware.httpunit.WebResponse;
@ -15,7 +14,8 @@ public class TestProxy extends WebappTestCase {
*/
public void testDefaultProxy() throws Exception {
WebConversation conversation = new WebConversation();
WebRequest request = new GetMethodWebRequest(getServerUrl() + "proxy/" + getServerUrl() + "welcome");
WebRequest request = new GetMethodWebRequest(getServerUrl()
+ "proxy?src=" + getServerUrl() + "resource/test2diagrams.txt");
WebResponse response = conversation.getResource(request);
// Analyze response
// Verifies the Content-Type header
@ -35,14 +35,15 @@ public class TestProxy extends WebappTestCase {
assertTrue(diagramLen > 1500);
assertTrue(diagramLen < 2500);
}
/*
public void testProxyWithFormat() throws Exception {
WebConversation conversation = new WebConversation();
WebRequest request = new GetMethodWebRequest(getServerUrl() + "proxy/svg/" + getServerUrl() + "welcome");
WebRequest request = new GetMethodWebRequest(getServerUrl()
+ "proxy?format=svg&src=" + getServerUrl() + "resource/test2diagrams.txt");
WebResponse response = conversation.getResource(request);
// Analyze response
// Verifies the Content-Type header
// TODO assertEquals( "Response content type is not SVG", "image/svg+xml", response.getContentType());
assertEquals( "Response content type is not SVG", "image/svg+xml", response.getContentType());
// Get the content and verify its size
String diagram = response.getText();
int diagramLen = diagram.length();
@ -56,12 +57,9 @@ public class TestProxy extends WebappTestCase {
public void testInvalidUrl() throws Exception {
WebConversation conversation = new WebConversation();
// Try to proxify an invalid address
WebRequest request = new GetMethodWebRequest(getServerUrl() + "proxy/invalidURL");
WebRequest request = new GetMethodWebRequest(getServerUrl() + "proxy?src=invalidURL");
WebResponse response = conversation.getResource(request);
// Analyze response, it must be the empty form
// Verifies the Content-Type header
assertEquals("Response content type is not HTML", "text/html", response.getContentType());
WebForm forms[] = response.getForms();
assertEquals(2, forms.length);
// Analyze response, it must be HTTP error 500
assertEquals("Response HTTP status is not 500", response.getResponseCode(), 500);
}
}