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/*
@VaadinApache2LicenseForJavaFiles@
*/
package com.vaadin.terminal.gwt.server;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import com.vaadin.Application;
import com.vaadin.terminal.Paintable;
import com.vaadin.terminal.StreamVariable;
import com.vaadin.terminal.VariableOwner;
import com.vaadin.terminal.WrappedRequest;
import com.vaadin.terminal.WrappedResponse;
import com.vaadin.ui.Component;
/**
* Application manager processes changes and paints for single application
* instance.
*
* This class handles applications running as servlets.
*
* @see AbstractCommunicationManager
*
* @author Vaadin Ltd.
* @version
* @VERSION@
* @since 5.0
*/
@SuppressWarnings("serial")
public class CommunicationManager extends AbstractCommunicationManager {
/**
* @deprecated use {@link #CommunicationManager(Application)} instead
* @param application
* @param applicationServlet
*/
@Deprecated
public CommunicationManager(Application application,
AbstractApplicationServlet applicationServlet) {
super(application);
}
/**
* TODO New constructor - document me!
*
* @param application
*/
public CommunicationManager(Application application) {
super(application);
}
/**
* Handles file upload request submitted via Upload component.
*
* @see #getStreamVariableTargetUrl(ReceiverOwner, String, StreamVariable)
*
* @param request
* @param response
* @throws IOException
* @throws InvalidUIDLSecurityKeyException
*/
public void handleFileUpload(WrappedRequest request,
WrappedResponse response) throws IOException,
InvalidUIDLSecurityKeyException {
/*
* URI pattern: APP/UPLOAD/[PID]/[NAME]/[SECKEY] See #createReceiverUrl
*/
String pathInfo = request.getRequestPathInfo();
// strip away part until the data we are interested starts
int startOfData = pathInfo
.indexOf(AbstractApplicationServlet.UPLOAD_URL_PREFIX)
+ AbstractApplicationServlet.UPLOAD_URL_PREFIX.length();
String uppUri = pathInfo.substring(startOfData);
String[] parts = uppUri.split("/", 3); // 0 = pid, 1= name, 2 = sec key
String variableName = parts[1];
String paintableId = parts[0];
StreamVariable streamVariable = pidToNameToStreamVariable.get(
paintableId).get(variableName);
String secKey = streamVariableToSeckey.get(streamVariable);
if (secKey.equals(parts[2])) {
VariableOwner source = getVariableOwner(paintableId);
String contentType = request.getContentType();
if (contentType.contains("boundary")) {
// Multipart requests contain boundary string
doHandleSimpleMultipartFileUpload(request, response,
streamVariable, variableName, source,
contentType.split("boundary=")[1]);
} else {
// if boundary string does not exist, the posted file is from
// XHR2.post(File)
doHandleXhrFilePost(request, response, streamVariable,
variableName, source, request.getContentLength());
}
} else {
throw new InvalidUIDLSecurityKeyException(
"Security key in upload post did not match!");
}
}
@Override
protected void unregisterPaintable(Component p) {
/* Cleanup possible receivers */
if (pidToNameToStreamVariable != null) {
Map<String, StreamVariable> removed = pidToNameToStreamVariable
.remove(getPaintableId(p));
if (removed != null) {
for (String key : removed.keySet()) {
streamVariableToSeckey.remove(removed.get(key));
}
}
}
super.unregisterPaintable(p);
}
private Map<String, Map<String, StreamVariable>> pidToNameToStreamVariable;
private Map<StreamVariable, String> streamVariableToSeckey;
@Override
String getStreamVariableTargetUrl(VariableOwner owner, String name,
StreamVariable value) {
/*
* We will use the same APP/* URI space as ApplicationResources but
* prefix url with UPLOAD
*
* eg. APP/UPLOAD/[PID]/[NAME]/[SECKEY]
*
* SECKEY is created on each paint to make URL's unpredictable (to
* prevent CSRF attacks).
*
* NAME and PID from URI forms a key to fetch StreamVariable when
* handling post
*/
String paintableId = getPaintableId((Paintable) owner);
String key = paintableId + "/" + name;
if (pidToNameToStreamVariable == null) {
pidToNameToStreamVariable = new HashMap<String, Map<String, StreamVariable>>();
}
Map<String, StreamVariable> nameToStreamVariable = pidToNameToStreamVariable
.get(paintableId);
if (nameToStreamVariable == null) {
nameToStreamVariable = new HashMap<String, StreamVariable>();
pidToNameToStreamVariable.put(paintableId, nameToStreamVariable);
}
nameToStreamVariable.put(name, value);
if (streamVariableToSeckey == null) {
streamVariableToSeckey = new HashMap<StreamVariable, String>();
}
String seckey = streamVariableToSeckey.get(value);
if (seckey == null) {
seckey = UUID.randomUUID().toString();
streamVariableToSeckey.put(value, seckey);
}
return "app://" + AbstractApplicationServlet.UPLOAD_URL_PREFIX + key
+ "/" + seckey;
}
@Override
protected void cleanStreamVariable(VariableOwner owner, String name) {
Map<String, StreamVariable> nameToStreamVar = pidToNameToStreamVariable
.get(getPaintableId((Paintable) owner));
nameToStreamVar.remove("name");
if (nameToStreamVar.isEmpty()) {
pidToNameToStreamVariable.remove(getPaintableId((Paintable) owner));
}
}
}
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