Why can't i see my ${token} in my jsp?
Question
I have been having a problem while trying to pass a variable to a JSP. This is my servlet code:
public class TwilioServlet extends HttpServlet {
private static final long serialVersionUID = 3645708904327108592L;
public static final String ACCOUNT_SID = "account_sid";
public static final String AUTH_TOKEN = "auth_token";
public static final String APP_SID = "app_sid";
public void service(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
TwilioCapability capability = new TwilioCapability(ACCOUNT_SID, AUTH_TOKEN);
capability.allowClientOutgoing(APP_SID);
String token = null;
try {
token = capability.generateToken();
} catch (DomainException e) {
e.printStackTrace();
}
// Forward the token information to a JSP view
response.setContentType("text/html");
request.setAttribute("token", token);
System.out.println("Capability toke is " + token);
RequestDispatcher view = request.getRequestDispatcher("client.jsp");
view.forward(request, response);
}
}
And, this is my client.jsp file:
<!DOCTYPE html>
<html>
<head>
<title>Hello Client Monkey 1</title>
<script type="text/javascript"
src="//media.twiliocdn.com/sdk/js/client/v1.3/twilio.min.js"></script>
<script type="text/javascript"
src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js">
</script>
<link href="//static0.twilio.com/resources/quickstart/client.css"
type="text/css" rel="stylesheet" />
<script type="text/javascript">
/* Create the Client with a Capability Token */
Twilio.Device.setup("${token}", {debug: true});
/* Let us know when the client is ready. */
Twilio.Device.ready(function (device) {
$("#log").text("Ready");
});
/* Report any errors on the screen */
Twilio.Device.error(function (error) {
$("#log").text("Error: " + error.message);
});
Twilio.Device.connect(function (conn) {
$("#log").text("Successfully established call");
});
/* Connect to Twilio when we call this function. */
function call() {
Twilio.Device.connect();
}
</script>
</head>
<body>
<button class="call" onclick="call();">Call</button>
<div id="log">Loading pigeons...</div>
</body>
</html>
This is from this tutorial .
I am accessing my page through the following URL:
http://localhost:8080/TwillioTest1/TwilioServlet
Why isn't ${token} being replaced?
2 answers
solution1
1 2016-08-04 13:06:12
Possible answer to your problem - click . Don't be afraid to use the power of Google.
Update
As suggested by @dur I include part of answer from link here:
Remove that DOCTYPE from web.xml and all should be well. A valid Servlet 3.0 (Tomcat 7, JBoss AS 6/7, GlassFish 3, etc) compatible web.xml look like below in its entirety, without any DOCTYPE:
<?xml version="1.0" encoding="UTF-8"?>
<web-app
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
</web-app>
solution2
0 2016-08-04 13:24:41
EL expressions may be disabled; you may have to activate them in your web.xml. Can you try this?
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