Querystring not found in Custom API get method

Question

I'm trying to read some parameters in the GET method from my custom API, although Azure Mobile Services is always returning this error:

Error in script '/api/customapi.js'. TypeError: Cannot read property 'lat' of undefined at C:\DWASFiles\Sites\XXXXXXXXX-android\VirtualDirectory0\site\wwwroot\App_Data\config\scripts\api\customapi.js:17:49 [external code]

The requested URL is like this: https://XXXXXXXXXX-android.azure-mobile.net/api/customapi?lat=-19&lng=-43

exports.post = function(request, response) {
    // Use "request.service" to access features of your mobile service, e.g.:
    //   var tables = request.service.tables;
    //   var push = request.service.push;

    response.send(statusCodes.OK, { message : 'Hello World!' });
};

exports.get = function(request, response) {
    if (request.parameters !== null) {

        var req = require("request");
        console.log("lat: " + request.parameters.lat);
        console.log("lng: " + request.parameters.lng);

    }
};

Answer 1

In custom APIs, the request parameter passed has the same properties as the request object used in express.js. To access the query string, you'd use request.query:

exports.get = function(request, response) {
    var httpReq = require("request");
    var lat = request.query.lat; // the type of the variable is a string; use something like parseFloat if you want it as a number
    var lng = request.query.lng;
    response.send(200, { lat: lat, lng: lng });
};