500 error on UrlFetchApp - api

Question

I am trying to pass data of a product list from Magento API to Google Spreadsheet.
No authentication was required for the Magento API as I was retrieving the data as a Guest. The API is working perfectly with RestClient.
However, 500 error occurred when fetching the REST resource from Googe Apps Script.
Exception: Request failed for
http://mymagentohost/api/rest/products?limit=2
returned code 500. Truncated server response: Service temporary
unavailable (use muteHttpExceptions option to examine full response)
This is my Google Apps Script:
function myscript() {
var url = "http://mymagentohost/api/rest/products?limit=2"
var response = UrlFetchApp.fetch(url);
var out = JSON.parse(response.getContentText());
var doc = SpreadsheetApp.create("Product Info");
var cell = doc.getRange('a1');
var index = 0;
for (var i in out) {
var value = out[i];
cell.offset(index, 0).setValue(i);
cell.offset(index, 1).setValue(value);
index++;
}
Any ideas?

Answer 1

Hey the trick is to add the following headers to your request
var url = "http://mymagentohost/api/rest/products?limit=2"
var params = {
headers: { 'Content-Type': "application/json", 'Accept': "application/json"},
muteHttpExceptions: true,
method: "GET",
contentType: "application/json",
validateHttpsCertificates: false,
};
var response = UrlFetchApp.fetch(url, params);
Believe the key params for Magento not to return 500 "Service temporary unavailable" are the Content-Type and Accept headers but all params mentioned in example are useful, YMMV.