How to call CREATE / DELETE GRAPH in Fuseki

[Arthur Keen]

For executing CREATE or DELETE GRAPH in Fuseki
I tried to use them the same way as SPARQL INSERT/DELETE by posting to 
../ds/update, but this did not work
 
Which Endpoint URL pattern I should use:
http://localhost:8080/ds/update, 
http://localhost:8080/ds/graph

For Creating a graph do you use an http put or post request?
For deleting a graph do you use an http delete request

And the name of the variable to bind the query to.  Using query, update, etc as 
variable names, see commented out lines of code below
Thanks very much,

Any guidance would be much appreciated

Arthur


For context, here is the node.js code that I am using to call fuseki, with 
commented out variations of httpreq that I have tried

//http://localhost:3000/graph/create?graphName=http://testGraph
 app.get('/api/graph/create', function(req, res){
   var update = "CREATE SILENT GRAPH <?:graphName>";
   var graphName = req.param("graphName");
   update = update.replaceAll("?:"+"graphName", graphName);
           //httpreq.post(endpoint.getUpdateURL(), {parameters: {update: 
update}}, function (geterr, getres){
           //httpreq.post(endpoint.getGraphURL(), {parameters: {update: 
update}}, function (geterr, getres){
       httpreq.put(endpoint.getGraphURL(), {parameters: {query: update}}, 
function (geterr, getres){
           if (geterr) return console.log(geterr);
         res.send(endpoint.getGraphURL()+"   "+ update+"   "+ graphName);
       });
   });

//http://localhost:3000/graph/delete?graphName=http://testGraph

app.get('/graph/delete', function(req, res) {
    var update = "DELETE SILENT GRAPH <?:graphName>";
    var graphName = req.param("graphName");
    update = update.replaceAll("?:" + "graphName", graphName);
    //httpreq.post(endpoint.getUpdateURL(), {parameters: {update: update}}, 
function(geterr, getres) {
    httpreq.delete(endpoint.getGraphURL(), {parameters: {graph: update}}, 
function(geterr, getres) {
        if (geterr)
            return console.log(geterr);
        console.log(update);
        res.send(endpoint.getGraphURL());
    });
});