Databases
StackOverflow2013
Postsdbo
POHTML5 Server Sent Events using Java Servlet 3 and tomcat
Body
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHTML5 Server Sent Events using Java Servlet 3 and tomcat
    text
    copied!<p>I tried to run this code in Eclipse with Tomcat but I don't get any output by the server in the client side. Should I include some libriries (jar files, js files ... ) to the project ? Thank you. </p> <p><strong>Here the two files:</strong> </p> <pre><code>&lt;html&gt; &lt;body onload ="registerSSE()" &gt; &lt;script&gt; function registerSSE() { alert('test 1'); var source = new EventSource('http://localhost:8080/hello/sse'); alert('Test2'); source.onmessage=function(event) { document.getElementById("result").innerHTML+=event.data + "&lt;br /&gt;"; }; /*source.addEventListener('server-time',function (e){ alert('ea'); },true);*/ } &lt;/script&gt; &lt;output id ="result"&gt;&lt;/output&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>the servlet :</p> <pre><code>import java.io.*; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class sse extends HttpServlet { public void doPost(HttpServletRequest request, HttpServletResponse response) { try { System.out.println("SSE Demo"); response.setContentType("text/event-stream"); PrintWriter pw = response.getWriter(); int i=0; while(true) { i++; pw.write("event: server-time\n\n"); //take note of the 2 \n 's, also on the next line. pw.write("data: "+ i + "\n\n"); System.out.println("Data Sent!!!"+i); if(i&gt;10) break; } pw.close(); } catch(Exception e) { e.printStackTrace(); } } public void doGet(HttpServletRequest request,HttpServletResponse response) { doPost(request,response); } } </code></pre> <p>Which version of tomcat should I need ? and also which connector type should i require?</p> <p><em><strong></em>_ WEB.XML <em>_</em></strong></p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"&gt; &lt;display-name&gt;demo&lt;/display-name&gt; &lt;welcome-file-list&gt; &lt;welcome-file&gt;index.html&lt;/welcome-file&gt; &lt;welcome-file&gt;index.htm&lt;/welcome-file&gt; &lt;welcome-file&gt;index.jsp&lt;/welcome-file&gt; &lt;welcome-file&gt;default.html&lt;/welcome-file&gt; &lt;welcome-file&gt;default.htm&lt;/welcome-file&gt; &lt;welcome-file&gt;default.jsp&lt;/welcome-file&gt; &lt;/welcome-file-list&gt; &lt;servlet&gt; &lt;servlet-name&gt;sse&lt;/servlet-name&gt; &lt;servlet-class&gt;sse&lt;/servlet-class&gt; &lt;load-on-startup&gt;1&lt;/load-on-startup&gt; &lt;/servlet&gt; &lt;servlet-mapping&gt; &lt;servlet-name&gt;sse&lt;/servlet-name&gt; &lt;url-pattern&gt;*.html&lt;/url-pattern&gt; &lt;/servlet-mapping&gt; &lt;/web-app&gt; </code></pre>
 

Querying!

 
Guidance
An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload