我可以将日历事件与 Microsoft Graph API 同步吗？

我正在使用 Microsoft Graph api 尝试从 Outlook 同步日历事件。我在看本文 https://msdn.microsoft.com/en-us/office/office365/api/calendar-rest-operations#SyncCalendarView关于 Outlook api，建议我添加标头odata.track-changes根据我的要求，我会收到deltaToken，我可以在稍后的请求中使用它来仅获取自上次同步以来已更新或创建的事件。

我已成功获取事件，但我没有取回 deltaToken :/

仅 Outlook api 支持此功能吗？图的响应有Preference-Applied: odata.track-changes，所以它确认了我的标题。这是我的示例请求：

GET /v1.0/me/calendar/calendarView
    ?startDateTime=2016-09-01T00:00:00.0000000
    &endDateTime=2099-01-01T00:00:00.0000000
    HTTP/1.1
Host: graph.microsoft.com
Authorization: Bearer XXX
Prefer: odata.track-changes
Prefer: odata.maxpagesize=3  //for testing
Cache-Control: no-cache

我的回复样本：

{
  "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#users('')/calendar/calendarView",
  "value": [
    {
      "@odata.etag": "",
      "id": "",
      "createdDateTime": "2016-08-04T14:00:25.8552351Z",
      "lastModifiedDateTime": "2016-08-25T14:43:54.9950828Z",
      "changeKey": "",
      "categories": [
        "Orange category"
      ],
      "originalStartTimeZone": "Eastern Standard Time",
      "originalEndTimeZone": "Eastern Standard Time",
      "responseStatus": {
        "response": "organizer",
        "time": "0001-01-01T00:00:00Z"
      },
      "iCalUId": "",
      "reminderMinutesBeforeStart": 15,
      "isReminderOn": true,
      "hasAttachments": false,
      "subject": "Closing on House",
      "body": {
        "contentType": "html",
        "content": ""
      },
      "bodyPreview": "",
      "importance": "normal",
      "sensitivity": "normal",
      "start": {
        "dateTime": "2016-09-08T19:30:00.0000000",
        "timeZone": "UTC"
      },
      "end": {
        "dateTime": "2016-09-08T21:30:00.0000000",
        "timeZone": "UTC"
      },
      "location": {
        "displayName": "245 E Main St",
        "address": {
          "street": "245 E Main St",
          "city": "Somewhere",
          "state": "NY",
          "countryOrRegion": "United States",
          "postalCode": ""
        }
      },
      "isAllDay": false,
      "isCancelled": false,
      "isOrganizer": true,
      "recurrence": null,
      "responseRequested": true,
      "seriesMasterId": null,
      "showAs": "busy",
      "type": "singleInstance",
      "attendees": [],
      "organizer": {
        "emailAddress": {
          "name": "",
          "address": ""
        }
      },
      "webLink": "https://outlook.office365.com/owa/?ItemID="
    },
    {
      "@odata.etag": "",
      "id": "",
      "createdDateTime": "2016-08-19T18:02:39.0607411Z",
      "lastModifiedDateTime": "2016-08-19T18:04:10.548447Z",
      "changeKey": "",
      "categories": [
        "Green category"
      ],
      "originalStartTimeZone": "UTC",
      "originalEndTimeZone": "UTC",
      "responseStatus": {
        "response": "organizer",
        "time": "0001-01-01T00:00:00Z"
      },
      "iCalUId": "",
      "reminderMinutesBeforeStart": 15,
      "isReminderOn": true,
      "hasAttachments": false,
      "subject": "Moving (off work)",
      "body": {
        "contentType": "html",
        "content": ""
      },
      "bodyPreview": "",
      "importance": "normal",
      "sensitivity": "normal",
      "start": {
        "dateTime": "2016-09-10T00:00:00.0000000",
        "timeZone": "UTC"
      },
      "end": {
        "dateTime": "2016-09-13T00:00:00.0000000",
        "timeZone": "UTC"
      },
      "location": {
        "displayName": "",
        "address": {}
      },
      "isAllDay": true,
      "isCancelled": false,
      "isOrganizer": true,
      "recurrence": null,
      "responseRequested": true,
      "seriesMasterId": null,
      "showAs": "oof",
      "type": "singleInstance",
      "attendees": [],
      "organizer": {
        "emailAddress": {
          "name": "",
          "address": ""
        }
      },
      "webLink": "https://outlook.office365.com/owa/?ItemID="
    },
    {
      "@odata.etag": "",
      "id": "",
      "createdDateTime": "2016-09-13T19:05:20.8438647Z",
      "lastModifiedDateTime": "2016-09-13T19:05:22.1899702Z",
      "changeKey": "",
      "categories": [],
      "originalStartTimeZone": "America/New_York",
      "originalEndTimeZone": "America/New_York",
      "responseStatus": {
        "response": "organizer",
        "time": "0001-01-01T00:00:00Z"
      },
      "iCalUId": "",
      "reminderMinutesBeforeStart": 15,
      "isReminderOn": true,
      "hasAttachments": false,
      "subject": "Coffee Break",
      "body": {
        "contentType": "html",
        "content": ""
      },
      "bodyPreview": "",
      "importance": "normal",
      "sensitivity": "normal",
      "start": {
        "dateTime": "2016-09-15T20:15:00.0000000",
        "timeZone": "UTC"
      },
      "end": {
        "dateTime": "2016-09-15T21:15:00.0000000",
        "timeZone": "UTC"
      },
      "location": {
        "displayName": "",
        "address": {}
      },
      "isAllDay": false,
      "isCancelled": false,
      "isOrganizer": true,
      "recurrence": null,
      "responseRequested": true,
      "seriesMasterId": null,
      "showAs": "busy",
      "type": "singleInstance",
      "attendees": [],
      "organizer": {
        "emailAddress": {
          "name": "",
          "address": ""
        }
      },
      "webLink": "https://outlook.office365.com/owa/?ItemID="
    }
  ]
}

我删除了所有我认为可能稍微敏感的内容。最终，我的 Laravel 应用程序尝试同步 4 个月前开始的事件，并永远持续到未来。

如果有更有效/更好的方法来做到这一点，我愿意接受建议。如果重要的话，这些结果是由 Postman 生成的。对此的任何帮助或澄清表示赞赏。

我最终使用了官方数据过滤器 http://www.odata.org/getting-started/basic-tutorial/像这样：

https://graph.microsoft.com/beta/me/calendar/calendarView?startDateTime=2016-05-01T00:00:00Z&endDateTime=2099-01-01T00:00:00Z&$filter=type eq 'singleInstance' and lastModifiedDateTime eq '2016-09-20T07:30:00+00:00'

这将获取之间安排的所有日历事件2016-05-01T00:00:00Z (May 1st, 2016, midnight, UTC and 2099-01-01T00:00:00Z (January 1st, 2099, midnight, UTC)其中事件类型是singleInstance（不是重复发生的事件）和lastModifiedDateTime是在上次同步之后（在本例中，2016-09-20T07:30:00+00:00).

这样做有一些陷阱：

1. 显然，这不是 url 编码的。你需要这样做。
2. 确保lastModifiedDateTime 示例中的 + 已正确编码为%2B，否则 Graph API 会将其视为空格并拒绝它。
3. 如果不过滤掉重复事件，您将获得从现在到 2099 年的每个重复事件。这就是获取列表的本质calendarViews相对于events.

如果我能再次这样做，我可能会返回并进行完整的日历同步，这是 Graph 支持的（我相信）。我只是不想同步整个日历，只想同步一个日期范围，但这似乎是注定要失败的努力。

但尽管没有重复发生的事件，它仍然有效。

UPDATE

我最终放弃了这个实现，主要是因为我在维护数据同步完整性、缺乏重复事件等方面遇到了持续的陷阱。相反，我提取了日历事件实时，并维护缓存。只是一些建议，以防其他人遇到我的情况。