Hey guys/gals,

I am trying to integrate the Outlook API from MS into a calendar app I'm building in Lightning. I have tried the code below, which I wrote today, but keep getting an error back saying: Malformed JSON. If I don't use JSON and send the request directly as a POST string, I get an error back saying the grant_type parameter is missing...although clearly not.

Any thoughts?

Thanks,
Paul
 

public Map<String, String> getAccessToken(String code) {
        HttpRequest req = new HttpRequest();
        Http http = new Http();
        HTTPResponse res;
        
        Map<String, String> access_data = new Map<String, String>();
        access_data.put('grant_type', 'authorization_code');
        access_data.put('client_id', APP_ID);
        access_data.put('client_secret', APP_PW);
        access_data.put('code', code);
        access_data.put('redirect_uri', APP_REDIRECT_URI);
        
        String request_body = (String)JSON.serialize(access_data);
        system.debug(request_body);
        
        req.setHeader('Content-Type', 'application/json');
        req.setEndpoint(APP_TOKEN_URL);
        req.setMethod('POST');
        req.setBody(request_body);
        req.setCompressed(true);

        try {
            res = http.send(req);
            system.debug(res.getBody());
            if (res.getStatusCode() == 400) {
                throw new NoDataFoundException('Bad Server Request'); 
            }
        } catch (Exception e) {
            Map<String, String> failure_response = new Map<String, String>();
            failure_response.put('Response', res.getBody());
            failure_response.put('Request', request_body);
            system.debug(e.getMessage());
            return failure_response;
        }
        
        Map<String, String> json_data = (Map<String, String>)JSON.deserialize(res.getBody(), Map<String, String>.class);
        this.setSessionToken(json_data.get('access_token'));
        
        return json_data;
    }