问题描述
我已经使用oAuth2从Google api获取用户访问令牌.现在,我想使用此令牌获取用户事件/日历.我已经尝试过以下代码,但无法正常工作.
I already have obtained users access token from google api using oAuth2. Now i want to use this token to get user events/calendars. I have tried following code but it is not working.
这里有人可以帮助我吗?谢谢
Can anyone here help me with this please.Thanks
var urlBuilder = new System.Text.StringBuilder();
urlBuilder.Append("https://");
urlBuilder.Append("www.googleapis.com");
urlBuilder.Append("/calendar/v3/users/me/calendarList");
urlBuilder.Append("?minAccessRole=reader");
var httpWebRequest = HttpWebRequest.Create(urlBuilder.ToString()) as HttpWebRequest;
httpWebRequest.CookieContainer = new CookieContainer();
httpWebRequest.Headers["Authorization"] string.Format("Bearer {0}", data.access_token);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream eventResponseStream = response.GetResponseStream();
StreamReader eventResponseStreamReader = new StreamReader(responseStream);
string eventsStr = eventResponseStreamReader.ReadToEnd();
推荐答案
我找到了使用Google.Apis.Calendar.v3
的解决方案,我将其发布在这里,所以可能会对其他人有所帮助.以下是当您具有用户的刷新令牌时获取事件列表的代码:
I have found solution using Google.Apis.Calendar.v3
, i am posting it here so may help someone else. Following is the code to get the events list when you have refresh token of a user:
首先使用刷新令牌获取新的访问令牌:
First get new access token using the refresh token:
string postString = "client_id=yourclientid";
postString += "&client_secret=youclientsecret&refresh_token=userrefreshtoken";
postString += "&grant_type=refresh_token";
string url = "https://www.googleapis.com/oauth2/v4/token";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url.ToString());
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
UTF8Encoding utfenc = new UTF8Encoding();
byte[] bytes = utfenc.GetBytes(postString);
Stream os = null;
request.ContentLength = bytes.Length;
os = request.GetRequestStream();
os.Write(bytes, 0, bytes.Length);
GoogleToken token = new GoogleToken();
HttpWebResponse webResponse = (HttpWebResponse)request.GetResponse();
Stream responseStream = webResponse.GetResponseStream();
StreamReader responseStreamReader = new StreamReader(responseStream);
string result = responseStreamReader.ReadToEnd();
JavaScriptSerializer serializer = new JavaScriptSerializer();
token = serializer.Deserialize<GoogleToken>(result);
然后使用令牌和刷新令牌创建凭据.
Then use the toke and refresh token to create credentials.
var flow = new GoogleAuthorizationCodeFlow(new GoogleAuthorizationCodeFlow.Initializer
{
ClientSecrets = new ClientSecrets
{
ClientId = yourclientid,
ClientSecret = yourclientsecret
},
Scopes = new[] { CalendarService.Scope.Calendar }
});
var credential = new UserCredential(flow, Environment.UserName, new TokenResponse
{
AccessToken = token.access_token,
RefreshToken = userrefreshtoke
});
CalendarService service = new CalendarService(new BaseClientService.Initializer()
{
HttpClientInitializer = credential,
ApplicationName = "application name",
});
var list = service.CalendarList.List().Execute().Items;
foreach (var c in list)
{
var events = service.Events.List(c.Id).Execute().Items.Where(i => i.Start.DateTime >= DateTime.Now).ToList();
foreach (var e in events)
{
}
}
GoogleToken类:
GoogleToken class:
public class GoogleToken
{
public string access_token { get; set; }
public string token_type { get; set; }
public string expires_in { get; set; }
}
这篇关于如何使用访问令牌和刷新令牌从Google API访问用户日历列表和事件的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!