CODEWITHSUNDEEP
javascriptnode.jsxml
Alex99
Alex99

Reputation: 67

How to get data from XML parser in nodeJS

I try to use nodeJS to get access to all data from an XML stored as a string in my code for now. Actually, I succeeded only getting access to the main node but not all children when i wanted to get deeper.

Here is my code, and I try to get all data in ms:IDENT node.

var http = require('http');
var xml2js = require('xml2js');

var extractedData = "";
var parser = new xml2js.Parser();

var xml = "<wfs:FeatureCollection><gml:boundedBy><gml:Box srsName='EPSG:3945'><gml:coordinates>1399644.376399,4179041.966594 1426575.406024,4209057.424111</gml:coordinates></gml:Box></gml:boundedBy><gml:featureMember><ms:SV_ARRET_P fid='SV_ARRET_P.1484'><gml:boundedBy><gml:Box srsName='EPSG:3945'><gml:coordinates>1418152.331881,4208150.797551 1418152.331881,4208150.797551</gml:coordinates></gml:Box></gml:boundedBy><ms:msGeometry><gml:Point srsName='EPSG:3945'><gml:coordinates>1418152.331881,4208150.797551</gml:coordinates></gml:Point></ms:msGeometry><ms:GID>1484</ms:GID><ms:GEOM_O>196</ms:GEOM_O><ms:IDENT>FLA92A</ms:IDENT><ms:GROUPE>FLA92</ms:GROUPE><ms:LIBELLE>Fort Lajard</ms:LIBELLE><ms:TYPE>BUS</ms:TYPE><ms:CDATE>2017-01-06T14:15:10</ms:CDATE><ms:MDATE>2017-01-06T14:15:10</ms:MDATE></ms:SV_ARRET_P></gml:featureMember></wfs:FeatureCollection>"

parser.parseString(xml, function(err,result){
  //Extract the value from the data element
  xml = result['wfs:FeatureCollection'];
  parser.parseString(xml, function(err,result){
    extractedData = result['wfs:FeatureCollection']['gml:featureMember']['ms:SV_ARRET_P']['ms:IDENT'];
    console.log(extractedData);
  });
});

Thank you for any help in advance

Upvotes: 1

Views: 1727

Answers (1)

cartant
cartant

Reputation: 58400

With xml2js, the explicitArray option defaults to true, so all child nodes will be in an array.

You can access the value you are interested in like this (note that the second call to parseString is not required):

var parser = new xml2js.Parser();
parser.parseString(xml, function (error, result) {

    var value = result['wfs:FeatureCollection']['gml:featureMember'][0]['ms:SV_ARRET_P'][0]['ms:IDENT'][0];
    console.log(value);
});

If you specify explicitArray as false, arrays will be used only if there are multiple child nodes:

var parser = new xml2js.Parser({ explicitArray: false });
parser.parseString(xml, function (error, result) {

    var value = result['wfs:FeatureCollection']['gml:featureMember']['ms:SV_ARRET_P']['ms:IDENT'];
    console.log(value);
});

Upvotes: 1

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