Server-Side Data Fusion API Call with Node.js

tristan.hale
tristan.hale LSEG
in Data Fusion

I am able to run this code fine from a client-side app:

    $.ajaxSetup({
        beforeSend: function(xhr, settings) {
            xhr.setRequestHeader('Authorization', "Bearer " + myAccessToken);
        }
    });
    $.ajax(myURL, {
        dataType: 'json',
        type: 'get',
        success: function(data, status) {
            dataReturned1(data);
        },
        error: function(xhr, status, error) {
            console.log(xhr);
        }
    });

The problem comes when I attempt to run this server-side using Node.js, something like this:

var express = require('express');
var app = express();
var fs = require("fs");
var $ = require("jquery");
app.get('/sellsidebuyside', function (req, res) {
    // AJAX REQUEST AS ABOVE HERE
})
var server = app.listen(8081, function () {
   var host = server.address().address
   var port = server.address().port
   console.log("Example app listening at http://%s:%s", host, port)
})

The error message is:

TypeError: $.ajaxSetup is not a function

From online forums I gather that jQuery was perhaps never designed to run server-side, so this could be the root of my issue. It is suggested to use a standard XMLHttpRequest, but I'm not sure how to configure this to make a cross-domain request using the access token.

Please provide example JS code for a Data Fusion API call which will run server-side with Node.js?

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Best Answer

  • tristan.hale
    tristan.hale LSEG
    Answer ✓

    Thanks to a consultation with EPAM and some advice from the Boston lab teams, here it is! Note this is just a demo which dumps the result to the console...

    var express = require('express');
    var app = express();
    var q = require('q');
    var https = require('https');


    app.get('/sellsidebuyside', function (req, res) {
        var defer = q.defer();
        var referenceID = "1-4297777075";
        var myURL = "{instance hostname}";
        var myPath = "/datafusion/api/entity/search?limit=1000&dir=asc&parentUrisDirect=http%3A%2F%2Fpermid.org%2F" + referenceID + "&includePredicates=false&includeRelDir=false&parentPredicateFilters=30%7C%7C%7Chttp%3A%2F%2Frdf.thomsonreuters.com%2Frelationship%2FSellSideBuySideOrganization&filterType=and&includeHiddenFields=false";
        var access_token = "{your_token_here}";
        process.env.NODE_TLS_REJECT_UNAUTHORIZED = "0";
        var options = {
            hostname: myURL,
            path: myPath,
            port: 443,
            method: 'GET',
            headers: {'Authorization': 'Bearer ' + access_token,
                'Content-Type': 'application/json',
                'Accept': 'application/json'}
        };
        var request = https.request(options, function(res) {
            console.log(res);
            res.setEncoding('utf8');
            var body = '';
            res.on('data', (chunk) => {
                body += chunk;
            });
            res.on('end', () => {
                console.log(body);
                defer.resolve(body);
            });
        });
        request.on('error', (e) => {
            console.log(e);
            defer.reject(e);
        });
        request.end();
        defer.promise.then((result) => {
            res.send(result);
        }, (error) => {
            res.send(error);
        });
    });
    var server = app.listen(8081, function () {
       var host = server.address().address;
       var port = server.address().port;
       console.log("Example app listening at http://%s:%s", host, port);
    });

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