Changeset 4 for src/main/webapp/newsession.xhtml

Timestamp:

09/24/19 14:13:26 (5 years ago)

Author:

bart

Message:

Fixed performance issue with some computers

File:

• src/main/webapp/newsession.xhtml (modified) (6 diffs)

src/main/webapp/newsession.xhtml

@@ -40 +40 @@
         <div id="box" class="box">
                 <br /> <b>Participants</b> <br /> Parties Server: <input type="url"
-                        name="url" id="partiesserverurl" value="localhost:8080/partiesserver-1.0.0"
+                        name="url" id="partiesserverurl"
+                        value="localhost:8080/partiesserver-1.0.0"
                         pattern=".*:[0-9]+/partiesserver" size="30"
-                        onchange="connectParties()"> </input> <br />
-                <br /> <b>Edit next party</b> <br /> Party: <select id="partyselection">
+                        onchange="connectParties()"> </input> <br /> <br /> <b>Edit
+                        next party</b> <br /> Party: <select id="partyselection">
                 </select> <br /> Profile: <select id="profileselection">
                 </select> <br />
@@ -71 +72 @@
 
         <div id="started" style="visibility: hidden">
+                Your session started. Waiting for the results. <br />
+        </div>
+        <div id="results" style="visibility: hidden">
                 Your session started.<br /> <a href="" id="logref">view the log
                         file</a> <br /> <a href="" id="plotref">render a utilities plot</a>.
@@ -78 +82 @@
 
 <script type="application/javascript">
+        
         
         
@@ -310 +315 @@
                 if (this.readyState == 4) {
                         if (this.status == 200) {
+                                var logurl="log/"+this.responseText+".json";
                                 document.getElementById("startbutton").disabled=true;
-                                document.getElementById("logref").href="log/"+this.responseText+".json";
+                                document.getElementById("logref").href=logurl;
                                 document.getElementById("plotref").href="plotlog.xhtml?id="+this.responseText;
+                                document.getElementById("started").setAttribute("style","");
                                 
-                                sometimeWhen(function() { x=x+1; return x==3 },
-                                                function() { document.getElementById("started").setAttribute("style",""); });
+                                sometimeWhen(function() { return urlExists(logurl) },
+                                                function() { document.getElementById("results").setAttribute("style",""); });
 
                         }
@@ -327 +334 @@
         }
 
+
+        /**
+        @return true iff the URL exists.
+        */
+        function urlExists(urlToFile) {
+                // Warning. Synchronous XMLHttpRequest on the main thread is 
+                // deprecated because of its detrimental effects to the end user’s
+                // experience. For more help http://xhr.spec.whatwg.org/
+            var xhr = new XMLHttpRequest();
+            xhr.open('HEAD', urlToFile, false);
+            xhr.send();
+             
+                return (xhr.status == "200") 
+        }
         
         /**
@@ -361 +382 @@
 
 
+
 </script>