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Is there a way to add a token to HTTP JSON Retriever DS?

  • Just curious if it's possible to add a token to the ds?

  • Hi psysak, welcome back! So soon! :P

    It is not currently available, but it is a really good idea to allow some static headers to be configured, as the publisher does.

    You could achieve this using the HttpBuilder from a scripting data source, though. Perhaps as in this thread:

  • This post is deleted!

  • OK laaast question :)

    I've created this in a scripting source

    function getRequest(_id, serial) {
        // This portion is the part which actually retreives the data from api
        HttpBuilder.get("https://thisisadomain/api/v2/sensors/" + _id + "/analyses/timeseries?dateRequest=dtd&units=l&resolution=h", headers, parameters).err(function(status, headers, content) {
          throw "Script failed with HTTP status: " + status;
        }).resp(function(status, headers, content) { 
           // Needs to be 200 status or you can set the accepted statuses
           // If all is well then call the parsing function and pass the JSON to it
           match = RegExp(regex).exec(content);

    Ignoring that there is clearly other parts missing which I didn't paste here, my question revolves around the line


    I should have known that doesn't work because serial is not a variable name, but I want to someone use serial to point to the correct variable in the data source. Basically, I am passing a serial and id number to this function which calls an api passing the id to it which in turn returns a value, I regex that value and want to set a variable with the "Variable Name" of serial. I have created these variables in the DS prior to this. How do I get that reference to the point so I can run set on it?

  • My suggestion would be to chain it.
    have it return that value and use that as the context point to fire the next part in the function. return alphanumeric as a json string and parse with new part of your script. take the parsed values to get your datapoint and set accordingly.
    EDIT, you may have to do this with a meta point source...
    Oh I see.... you're losing the value in the callback. I wonder if you can use bind().
    set your callback as a separate function and bind serial to it... I've not got a lot of time to test and help right now,,,
    EDIT 2:

    OK i've gone back and had a tinker. Think I will need more info Psysak,,,

     function httpReq(url,method,callback,headers,params,serial)
    {//Second format, full request
       // callback.bind(serial);
    	.err(function(status, headers, content) { //setErrorCallback for linguistic completion
    	// callback
    	function(status, headers, content) { //setResponseCallback
    	}  ).excp(function(exception) { //setExceptionCallback
    		throw exception.getMessage();
    	.err(function(status, headers, content) { //setErrorCallback for linguistic completion
    		  //setErrorCallback for linguistic completion
                	print(status);	print(content);
    	function(status, headers, content) { //setResponseCallback
    			print(content);//	print(status);
    	}  ).excp(function(exception) { //setExceptionCallback
    		throw exception.getMessage();

    I can't replicate your issue. and am still able to print the serial. however, serial is a context point (different name). that' i've injected as a parameter,. Shouldn't make a difference though.

  • Hey @MattFox thanks for the response.

    Hmm. So what I'm doing is trying to substitute serial with a string from the api call, and that string is supposed to be the same name as the "Variable Name" of a point I created in that scripting DS. I noticed that if I hard code a value of serial so for example

    serial = 123456789;

    Where 123456789 is an existing data point with that Variable Name, if I print serial it is an object. So I assume the issue is that I get a string back from the API and then I'm trying to substitute that for serial and call .set() on it. This is not a reference to the data point right?

  • So I dug around in the forum a bit and for now I think I'm going to do a pointquery for the xid and then set from there :)

  • It's not clear to me what serial was because it's only an argument in a function in the code you presented, which could be anything. If it was a variable storing a string that was the variable name of something in context, you could do


    to access the context point.

  • Sorry @phildunlap you're right I missed details. Yes it was just a string which stores the variable name of a context object.
    So can you set on a this[serial]? I'll try it later

  • You should be able to. this[serial] would be a reference to a context point wrapper, so it would function like the context point (AbstractPointWrapper object) when referred to directly. CONTEXT_POINTS[serial] would then be the DataPointRT object.

  • Works like a charm.