<%@ page import="java.io.*,java.util.*,javax.script.*" %>
<%
// A script console jsp for Java
// Last modified: Zemian Deng <saltnlight5@gmail.com> 05/15/2014
ScriptEngineManager factory = new ScriptEngineManager();
// Get all the script engine names available by inspecting the classpath
List<String> scriptEngineNames = new ArrayList<String>();
for (ScriptEngineFactory fac : factory.getEngineFactories()) {
String name = fac.getLanguageName();
if (name.toLowerCase().equals("ecmascript")) {
name = "JavaScript";
}
scriptEngineNames.add(name);
}
// Process Form
String scriptText = request.getParameter("scriptText");
String scriptEngineName = request.getParameter("scriptEngineName");
if (scriptEngineName == null)
scriptEngineName = "JavaScript";
request.setAttribute("scriptText", scriptText);
request.setAttribute("scriptEngineName", scriptEngineName);
if (scriptText != null) {
ScriptEngine scriptEngine = factory.getEngineByName(scriptEngineName);
if (scriptEngine == null)
throw new RuntimeException("Failed to find ScriptEngine " + scriptEngineName);
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
PrintWriter webOut = new PrintWriter(outStream);
// Script engine binding variables.
Bindings bindings = scriptEngine.createBindings();
bindings.put("page", page);
bindings.put("config", config);
bindings.put("pageContext", pageContext);
bindings.put("request", request);
bindings.put("response", response);
bindings.put("out", out);
bindings.put("session", session);
bindings.put("application", application);
bindings.put("scriptEngine", scriptEngine);
bindings.put("webout", webOut);
// Run the scriptText
try {
Object scriptingOutput = scriptEngine.eval(scriptText, bindings);
if (scriptingOutput == null)
scriptingOutput = "";
request.setAttribute("scriptingOutput", scriptingOutput);
} catch (Exception e) {
throw new RuntimeException("Failed execute scriptText.", e);
} finally {
webOut.close();
String webOutResult = outStream.toString();
if (webOutResult == null)
webOutResult = "";
request.setAttribute("webOutResult", webOutResult);
}
} else {
request.setAttribute("scriptText", "");
request.setAttribute("scriptingOutput", "");
request.setAttribute("webOutResult", "");
}
%>
<html>
<head>
<!--
Use a nice and simple JavaScript editor from http://codemirror.net
-->
<script src="//raw.githubusercontent.com/marijnh/CodeMirror/4.1.0/lib/codemirror.js"></script>
<script src="//raw.githubusercontent.com/marijnh/CodeMirror/4.1.0/mode/javascript/javascript.js"></script>
<script src="//raw.githubusercontent.com/marijnh/CodeMirror/4.1.0/mode/groovy/groovy.js"></script>
<link rel="stylesheet" href="//raw.githubusercontent.com/marijnh/CodeMirror/4.1.0/lib/codemirror.css">
</head>
<body>
<h4>Script Console for Java</h4>
<form method="post">
<textarea id="code" name="scriptText" rows="20" cols="80"><%= request.getAttribute("scriptText") %></textarea>
<br/>
<select name="scriptEngineName">
<%
for (String engineName : scriptEngineNames) {
if (scriptEngineName.equals(engineName))
out.println("<option selected='true'>" + engineName + "</option>");
else
out.println("<option>" + engineName + "</option>");
}
%>
</select>
<input name="Run" type="submit" value="run"/>
<hr/>
<pre>
<%= request.getAttribute("scriptingOutput") %>
<%= request.getAttribute("webOutResult") %>
</pre>
</form>
<script>
var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
lineNumbers: true
});
</script>
</body></html>