Bug: XML/CSV detection heuristic is inaccurate

[moltar]

mws-api/lib/client.js

Line 129 in e109961

if (body.slice(0, 5) !== '<?xml') {

FulfillmentInventory.ListInventorySupply call does not return a valid XML prolog, thereby <?xml test fails and the CSV is assumed.

First line of the response is:

<ListInventorySupplyResponse xmlns="http://mws.amazonaws.com/FulfillmentInventory/2010-10-01/">

[donhmorris]

There is a similar problem in request.js when retrieving a browse tree report using Reports.GetReport.

I made a temp fix by altering this code in request.js:

getResult(data) {
    const path = `${this.options.basePath}` + (this.options.data ? `.${this.options.data}` : '');

    const isArray = this.options.isArray;
    return maybeArrayify(isArray, path ? _.get(data, path, **data**) : data);
}