Import javascript library

arvand.owji

@phildunlap do we have any sample javascripts that cna be used in node.js that use mangoapi? like retrieving values by XID and setting values? Thanks.

phildunlap

Yeah you might be able to get what you're looking for from the tests we've implemented in node: https://github.com/infiniteautomation/node-mango-client

arvand.owji

@phildunlap Thanks. I get this error when i try to run the example:

$node example.js
(node:24509) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Error: connect ECONNREFUSED 127.0.0.1:8443

phildunlap

You would have to point it at your running Mango instance and port. It's from this section of example.js:

const client = new MangoClient({
    protocol: 'https',
    host: 'localhost',
    port: 8443,
    rejectUnauthorized: false
});

arvand.owji

@phildunlap said in Import javascript library:

You would have to point it at your running Mango instance and port. It's from this section of example.js:
const client = new MangoClient({
    protocol: 'https',
    host: 'localhost',
    port: 8443,
    rejectUnauthorized: false
});

Its running locally on the same box. shouldnt localhost be enough? Thanks

phildunlap

No. It is using the HTTP API which is over TCP/IP and all TCP/IP connections require an address and a port. Edit: yes localhost is the host if its the same machine (usually, localhost means 127.0.0.1 usually)

arvand.owji

@phildunlap said in Import javascript library:

No. It is using the HTTP API which is over TCP/IP and all TCP/IP connections require an address and a port. Edit: yes localhost is the host if its the same machine (usually, localhost means 127.0.0.1 usually)

ok, so im on the same machine and tried the local ip of the machine and still the samething.
Unhandled promise rejection (rejection id: 1): Error: connect ECONNREFUSED 192.168.1.125:8443

ami i missing something?

phildunlap

Mango is not running on port 8443?

arvand.owji

@phildunlap said in Import javascript library:

Mango is not running on port 8443?

mmm, where can i check it?

phildunlap

It's the web.port property in your Mango/overrides/properties/env.properties file or Mango/classes/env.properties files as "web.port". Judging from your earlier port of the HTTP Retriever data source, it's 85, but i have no way of knowing. It's 8080 by default.

arvand.owji

@phildunlap said in Import javascript library:

It's the web.port property in your Mango/overrides/properties/env.properties file or Mango/classes/env.properties files as "web.port". Judging from your earlier port of the HTTP Retriever data source, it's 85, but i have no way of knowing. It's 8080 by default.

ok, web.port=8080 but i still get the same error as before.

$node example.js
(node:7075) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Error: connect ECONNREFUSED 192.168.1.125:8080

phildunlap

Mango is probably not running. Connection refused means the port isn't open.

arvand.owji

@phildunlap said in Import javascript library:

Mango is probably not running. Connection refused means the port isn't open.

I know it does as i can login into the web admin panel.

phildunlap

Is https://192.168.1.125:8080 typed into your address bar?

Edit: In the end HTTP localhost 80 prevailed

arvand.owji

@phildunlap said in Import javascript library:

Is https://192.168.1.125:8080 typed into your address bar?

Edit: In the end HTTP localhost 80 prevailed

ok, i managed to get it working on port 80 and also changing https to http.
Now i see only getValue function in datapoints.js. Is there any sort of setValue function available? Thanks.

phildunlap

No you would have to add it, something like,

        static setValue(xid, valueTime) {
            return client.restRequest({
                method: 'PUT',
                path: '/rest/v1/point-values/' + encodeURIComponent(xid),
                data: {
                  "dataType": "NUMERIC",
                  "value": valueTime.value,
                  "timestamp": valueTime.time,
                  "annotation": "annotation" in valueTime ? valueTime.annotation : null
                }
            }).then(response => {
                return response.data;
            });
        }

        setValue(valueTime) {
            return this.constructor.setValue(this.xid, valueTime);
        }

Which should work for numeric points. You would have to do something more clever to make this fully general purpose as currently the DataPoint object doesn't know its data type.

The node library is definitely not a finished product and anything you create is certainly encouraged to be shared.

phildunlap

Also be sure to check out test/pointValue.spec.js

arvand.owji

@phildunlap said in Import javascript library:

No you would have to add it, something like,
        static setValue(xid, valueTime) {
            return client.restRequest({
                method: 'PUT',
                path: '/rest/v1/point-values/' + encodeURIComponent(xid),
                data: {
                  "dataType": "NUMERIC",
                  "value": valueTime.value,
                  "timestamp": valueTime.time,
                  "annotation": "annotation" in valueTime ? valueTime.annotation : null
                }
            }).then(response => {
                return response.data;
            });
        }

        setValue(valueTime) {
            return this.constructor.setValue(this.xid, valueTime);
        }
Which should work for numeric points. You would have to do something more clever to make this fully general purpose as currently the DataPoint object doesn't know its data type.

The node library is definitely not a finished product and anything you create is certainly encouraged to be shared.

it complains about TypeError: Cannot use 'in' operator to search for 'annotation' in 2118.7704248055056

arvand.owji

this is what i am calling

DataPoint.setValue('DP_540483','2118.7704248055056');

phildunlap

DataPoint.setValue('DP_540483','2118.7704248055056')

should be more like...

DataPoint.setValue('DP_540483', {'value': 2118.7704248055056, 'time': new Date().getTime()});