Create a POST body using Google Apps Script - post

Question

I'm trying to create a Google Apps Script that adds a new owner to the user's Google calendar. The first code block below works correctly (returns the calendar ACL in JSON format). How can I add a new user to the acl using Google Apps Script? The second code block shows my attempt to insert a new rule into the acl.
function getCalendarACL() {
// Get Calendar ID, script user's email, and the API Key for access to Calendar API
var calId = 'abc123#group.calendar.google.com';
var userEmail = Session.getActiveUser().getEmail();
var API_KEY = '012345abc123';
// Get authorization to access the Google Calendar API
var apiName = 'calendar';
var scope = 'https://www.googleapis.com/auth/calendar';
var fetchArgs = googleOAuth_(apiName, scope);
// Get the authorization information and the given calendar
fetchArgs.method = 'GET';
// Get the requested content (the ACL for the calendar)
var base = 'https://www.googleapis.com/calendar/v3/calendars/';
var url = base + calId + '/acl?key=' + API_KEY;
var content = UrlFetchApp.fetch(url, fetchArgs).getContentText();
Logger.log(content);
}
function googleOAuth_(name,scope) {
var oAuthConfig = UrlFetchApp.addOAuthService(name);
oAuthConfig.setRequestTokenUrl("https://www.google.com/accounts/OAuthGetRequestToken?scope="+scope);
oAuthConfig.setAuthorizationUrl("https://www.google.com/accounts/OAuthAuthorizeToken");
oAuthConfig.setAccessTokenUrl("https://www.google.com/accounts/OAuthGetAccessToken");
oAuthConfig.setConsumerKey("anonymous");
oAuthConfig.setConsumerSecret("anonymous");
return {oAuthServiceName:name, oAuthUseToken:"always"};
}
Here's the second code block that returns server error 400 ("parse error"):
function insertRule() {
// Get Calendar ID, script user's email, and the API Key for access to Calendar API
var calId = 'abc123#group.calendar.google.com';
var userEmail = Session.getActiveUser().getEmail();
var API_KEY = '012345abc123';
var newUserEmail = 'person#gmail.com';
// Get authorization to access the Google Calendar API
var apiName = 'calendar';
var scope = 'https://www.googleapis.com/auth/calendar';
var fetchArgs = googleOAuth_(apiName, scope);
// Get the authorization information and the given calendar
fetchArgs.method = 'GET';
// Create the POST request body
var rawXML = "<entry xmlns='http://www.w3.org/2005/Atom' " +
"xmlns:gAcl='http://schemas.google.com/acl/2007'>" +
"<category scheme='http://schemas.google.com/g/2005#kind'" +
"term='http://schemas.google.com/acl/2007#accessRule'/>" +
"<gAcl:scope type='user' value='"+newUserEmail+"'></gAcl:scope>" +
"<gAcl:role='writer'>" +
"</gAcl:role>" +
"</entry>";
// Get the requested content (the ACL for the calendar)
var base = 'https://www.googleapis.com/calendar/v3/calendars/';
var url = base + calId + '/acl?key=' + API_KEY;
var content = UrlFetchApp.fetch(url, fetchArgs).getContentText();
Logger.log(content);
}

Answer 1

I would encode the newUserEmail variable like this encodeURIComponent(newUserEmail) when making the rawXML string and then retry.

Answer 2

You are using:
fetchArgs.method = 'GET';
but at the Acl:insert page found here says this:
HTTP Request
POST https://www.googleapis.com/calendar/v3/calendars/calendarId/acl
So, it should be,
fetchArgs.method = 'POST';