Question

我正在尝试访问Google API v3 Calendarlist，但即使我为用户提供了有效的AccessToken，我仍会收到401/404回复。
（我已完成OAuth2 protocol for Web Server Applications并获得了https://www.googleapis.com/auth/calendar权限）

为此找到好的文档相当困难，谷歌网站本身不是很有帮助，搜索充满了旧的v2信息或使用SDK。通常我可以将python回复转换为c＃，但在这种情况下，即使这对我没有帮助。

所以我把头发拉了出去，但我可能会忘记一些非常简单的东西，比如一个缺失的参数或某些东西，所以如果有人快速查看这段代码并告诉我我的内容，我将不胜感激。我做错了。

var applicationKey = moduleModel.Application.Key;
var userID = moduleModel.User.UserID;
var accessToken = moduleModel.User.AccessToken.Token;

// It doesn't seem to make any difference whether I use the querystring
// parameter or the request header to specify the access_token
var sendAccessTokenAsHeader = 
    !(Request.QueryString["SendAccessTokenAsHeader"] == "0");

// I tried navigating to a specific user but it results in a 404 Not Found
var requestSpecificUserID = 
    Request.QueryString["RequestSpecificUserID"] == "1";

// Including or omitting my API_KEY doesn't seem to make any difference
var sendApplicationKey = 
    !(Request.QueryString["SendApplicationKey"] == "0");

var urlBuilder = new System.Text.StringBuilder();

urlBuilder.Append("https://");
urlBuilder.Append("www.googleapis.com");

if (requestSpecificUserID)
{
    urlBuilder.Append
        (string.Format("/calendar/v3/users/{0}/calendarList", userID));
}
else
{
    urlBuilder.Append
        ("/calendar/v3/users/me/calendarList");
}

var parameterJoiner = "?";

if (sendApplicationKey)
{
    urlBuilder.Append
    (
        string.Format
        (
            "{0}{1}={2}",
            parameterJoiner,
            "key",
            HttpUtility.UrlEncode(applicationKey)
        )
    );
    parameterJoiner = "&";
}

if (!sendAccessTokenAsHeader)
{
    urlBuilder.Append
    (
        string.Format
        (
            "{0}{1}={2}",
            parameterJoiner,
            "access_token",
            HttpUtility.UrlEncode(accessToken)
        )
    );
    parameterJoiner = "&";
}

var httpWebRequest = HttpWebRequest.Create(urlBuilder.ToString()) 
    as HttpWebRequest;
httpWebRequest.CookieContainer = new CookieContainer();

if (sendAccessTokenAsHeader)
{
    httpWebRequest.Headers["Authorization"] = string.Format
    (
        "Bearer {0}",
        accessToken
    );
}

// GetSafeResponse is just an extension method to catch the WebException 
// when the HttpStatusCode != OK

var response = httpWebRequest.GetSafeResponse(); 

// returns 401 (requestSpecificUserID = false)
// or 404 (requestSpecificUserID = true)

var responseText = response.GetResponseText();

return responseText;

提前谢谢！

Answer 1

我通过阅读this问题找到了答案。

显然，即使Google文档未提及，也需要参数 minAccessRole 。

工作示例：

var accessToken = moduleModel.User.AccessToken.Token;

var urlBuilder = new System.Text.StringBuilder();

urlBuilder.Append("https://");
urlBuilder.Append("www.googleapis.com");
urlBuilder.Append("/calendar/v3/users/me/calendarList");
urlBuilder.Append("?minAccessRole=writer");

var httpWebRequest = HttpWebRequest.Create(urlBuilder.ToString()) 
    as HttpWebRequest;

httpWebRequest.CookieContainer = new CookieContainer();
httpWebRequest.Headers["Authorization"] = 
    string.Format("Bearer {0}", accessToken);

var response = httpWebRequest.GetSafeResponse();

var responseText = response.GetResponseText();

return responseText;

Google Calendar API v3：使用AccessToken检索CalendarList

1 个答案: