/**
* Prepare a script for execution in an iframe environment
*
* @param script The script to modify
* @return The modified script
*/
public static String remoteEval(String script) {
// We need to define the "r" redirector variable inside the eval as well
// as it can't access the global "r" defined in the response closure.
return "r._eval(\"var r=dwr._[dwr.engine._instanceId]; "
+ JavascriptUtil.escapeJavaScript(script)
+ "\");";
}
/**
* Evade the 2 connection limit by sending scripts to the wrong window and having that use
* window.name to push it to the right window
*
* @param original The script that we wish to be proxied
* @param windowName The window to which we wish the window to be proxied
* @return A script to send to a different window to cause proxying
*/
public static ScriptBuffer createForeignWindowProxy(String windowName, ScriptBuffer original) {
String proxy = JavascriptUtil.escapeJavaScript(original.toString());
ScriptBuffer reply = new ScriptBuffer();
reply.appendCall("r.handleForeign", windowName, proxy);
reply.appendData(proxy);
return reply;
}
/**
* Call dwr.engine.remote.handleServerException() in the browser
*
* @param batchId The identifier of the batch that we are handling a response for
* @param ex The exception from which we make a reply
* @return The script to send to the browser
*/
public static String getRemoteHandleBatchExceptionScript(String batchId, Exception ex) {
StringBuffer reply = new StringBuffer();
String output = JavascriptUtil.escapeJavaScript(ex.getMessage());
String params = "{ name:'" + ex.getClass().getName() + "', message:'" + output + "' }";
if (batchId != null) {
params += ", '" + batchId + "'";
}
reply.append(ProtocolConstants.SCRIPT_CALL_REPLY).append("\r\n");
reply.append("r.handleBatchException(").append(params).append(");\r\n");
return reply.toString();
}
/**
* Convert a map of strings to objects to json
*
* @param map object to convert
* @param sb StringBuffer to append to
*/
private void toJSONString(Map<String, Object> map, StringBuffer sb) {
boolean first = true;
sb.append('{');
for (Map.Entry<String, Object> entry : map.entrySet()) {
if (first) first = false;
else sb.append(',');
sb.append('"');
if (entry.getKey() == null) sb.append("null");
else sb.append(JavascriptUtil.escapeJavaScript(entry.getKey()));
sb.append('"').append(':');
sb.append(toJSONString(entry.getValue()));
}
sb.append('}');
}
/**
* Convert all other objects to json
*
* @param object object to convert
* @param sb StringBuffer to append to
*/
private void toJSONString(Object object, StringBuffer sb) {
if (object == null) sb.append("null");
else sb.append('"').append(JavascriptUtil.escapeJavaScript(object.toString())).append('"');
}
/**
* Take an XML string, and convert it into some Javascript that when executed will return a DOM
* object that represents the same XML object
*
* @param xml The XML string to convert
* @return The Javascript
*/
public static String xmlStringToJavascriptDomDocument(String xml) {
String xmlout = JavascriptUtil.escapeJavaScript(xml);
return "r.toDomDocument(\"" + xmlout + "\")";
}
/* (non-Javadoc)
* @see org.directwebremoting.Converter#convertOutbound(java.lang.Object, org.directwebremoting.OutboundContext)
*/
public OutboundVariable convertOutbound(Object data, OutboundContext outctx)
throws ConversionException {
URI uri = (URI) data;
String escaped = JavascriptUtil.escapeJavaScript(uri.toString());
return new NonNestedOutboundVariable('\"' + escaped + '\"');
}
