Permintaan Google Kalender API V3 FreeBusy menerima Kesalahan Permintaan Buruk

Saya mencoba mengambil data FreeBusy dari kalender Google saya menggunakan klien .NET API V3.

Kode berikut memungkinkan saya untuk login menggunakan otentikasi layanan dan mengambil daftar kalender dan pengaturan kalender. Saya juga dapat mengambil acara seperti yang ditunjukkan.

Untuk membuat ini berfungsi, saya telah membagikan kalender saya dengan Id pengembangan saya:

‹id-saya›@developer.gserviceaccount.com

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Google.Apis.Calendar;
using Google.Apis.Calendar.v3;
using Google.Apis.Authentication;
using Google.Apis.Authentication.OAuth2;
using Google.Apis.Authentication.OAuth2.DotNetOpenAuth;
using DotNetOpenAuth.OAuth2;
using System.Diagnostics;
using Google.Apis.Calendar.v3.Data;
using System.Security.Cryptography.X509Certificates;
using Google.Apis.Discovery;
using Google.Apis.Drive.v2;
using Google.Apis.Util;

namespace consoleGoogleResearch
{
    class Program
    {
        private const string SERVICE_ACCOUNT_EMAIL = "<your-value>@developer.gserviceaccount.com";
        private const string SERVICE_ACCOUNT_PKCS12_FILE_PATH = @"<path-to\<your-value>-privatekey.p12";

        /// <summary>
        /// Build a Calendar service object authorized with the service account.
        /// </summary>
        /// <returns>Drive service object.</returns>
        static CalendarService BuildCalendarService()
        {
            AssertionFlowClient client = new AssertionFlowClient(
                GoogleAuthenticationServer.Description, new X509Certificate2(SERVICE_ACCOUNT_PKCS12_FILE_PATH, "notasecret", X509KeyStorageFlags.Exportable))
            {
                Scope = CalendarService.Scopes.Calendar.GetStringValue(),
                ServiceAccountId = SERVICE_ACCOUNT_EMAIL,
            };
            OAuth2Authenticator<AssertionFlowClient> authenticator = new OAuth2Authenticator<AssertionFlowClient>(client, AssertionFlowClient.GetState);
            return new CalendarService(authenticator);
        }

        public static void Main(string[] args)
        {
            var service = BuildCalendarService();

            // Get the calendar service
            Google.Apis.Calendar.v3.CalendarListResource.ListRequest clrq = service.CalendarList.List();
            var result = clrq.Fetch();

            // Prove we can get the settings.
            SettingsResource.ListRequest slr = service.Settings.List();
            var sr = slr.Fetch();

            try
            {
                Console.WriteLine("Calendars: ");
                foreach (CalendarListEntry calendar in result.Items)
                {
                    Console.WriteLine("{0}", calendar.Id);
                    Console.WriteLine("\tAppointments:");
                    Google.Apis.Calendar.v3.EventsResource.ListRequest elr = service.Events.List(calendar.Id);
                    var events = elr.Fetch();
                    if (events.Items != null)
                    {
                        foreach (Event e in events.Items)
                        {
                            Console.WriteLine("\tSummary: {0}, Location: {1}", e.Summary, e.Location);
                            if (e.IsAllDayEvent())
                            {
                                Console.WriteLine("\t\tAll Day: {0}", e.Start.GetDateTime().ToLongDateString());
                            }
                            else
                            {
                                Console.WriteLine("\t\tFrom: {0}", e.Start.GetDateTime());
                                Console.WriteLine("\t\tTo: {0}", e.End.GetDateTime());
                            }
                            if (e.Attendees != null)
                            {
                                foreach (var att in e.Attendees)
                                {
                                    Console.WriteLine("Attendee:\t\t\t{0}<{1}>", att.DisplayName, att.Email);
                                }
                            }
                            Console.WriteLine();
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                log.DebugFormat("Error: {0}", ex.Message);
            }

            // Attempt to get free busy data.
            FreebusyResource.QueryRequest fbq = service.Freebusy.Query(new FreeBusyRequest());

            FreeBusyRequestItem c = new FreeBusyRequestItem();
            c.Id = "<your calendar id>";
            fbq.Body.Items = new List<FreeBusyRequestItem>();
            fbq.Body.Items.Add(c);
            fbq.Body.TimeZone = "Europe/London";
            fbq.Body.TimeMin = "2013-01-101T00:00:00.000Z";
            fbq.Body.TimeMax = "2013-01-301T00:00:00.000Z";

            // This call fails with global bad request
            var fbres = fbq.Fetch();

            Console.ReadKey();
        }
    }

    static internal class Extensions
    {
        static internal DateTime GetDateTime(this EventDateTime edt)
        {
            if (String.IsNullOrEmpty(edt.DateTime))
            {
                if (String.IsNullOrEmpty(edt.Date))
                {
                    return DateTime.MinValue;
                }
                else
                {
                    return DateTime.Parse(edt.Date);
                }
            }
            else
            {
                return DateTime.Parse(edt.DateTime);
            }
        }

        static internal Boolean IsAllDayEvent(this Event e)
        {
            return (e.Start.DateTime == null && e.Start.Date != null);
        }
    }
}

Namun kode yang mencoba mengambil informasi sibuk senggang selalu menerima kesalahan "permintaan buruk".

Saya telah memeriksa permintaan yang dikirim menggunakan fiddler dan sejauh yang saya lihat itu benar.

POST https://www.googleapis.com/calendar/v3/freeBusy?alt=json&prettyPrint=true HTTP/1.1
Authorization: Bearer <removed>
Content-Type: application/json; charset=utf-8
User-Agent: ConsoleApplication1 google-api-dotnet-client/ Win32NT/6.1.7601.65536 (gzip)
Host: www.googleapis.com
Content-Length: 144
Accept-Encoding: gzip, deflate

{"items":[{"id":"[email protected]"}],"timeMax":"2013-01-301T00:00:00.000Z","timeMin":"2013-01-101T00:00:00.000Z","timeZone":"Europe/London"}

Adakah yang bisa memberi tahu saya mengapa saya menerima kesalahan permintaan buruk dan yang lebih penting bagaimana cara memperbaikinya?

Terimakasih banyak

Kris.