尝试发送推送通知时出现 Firebase 403 禁止错误

Question

我有一个完全可用的旧版 HTTP 请求：

HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create("https://fcm.googleapis.com/fcm/send");
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = "POST";
httpWebRequest.PreAuthenticate = true;
httpWebRequest.Headers.Add("Authorization", "key=" + key);
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
    string message = "{\"to\":\"" + token.ToString() + 
        "\",\"notification\":{\"body\":\"" + body.ToString() +
        "\",\"title\":\"" + title.ToString() + "\"}," + 
        "\"data\":{\"key\":\"" + dataKey.ToString() + 
        "\",\"value\":\"" + dataValue.ToString() + "\"}}";

    streamWriter.Write(message);
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
    name = streamReader.ReadToEnd();
}

我正在尝试迁移到最新版本：

string uri = String.Format("https://fcm.googleapis.com/v1/projects/{0}/messages:send?access_token={1}&key={2}&alt=json", project, AccessToken, key);
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(uri);
httpWebRequest.Accept = "application/json";
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = "POST";
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
    string message = "{\"validateOnly\":true," +
        "\"message\":{" +
            "\"token\":\"" + token.ToString() + "\"," +
            "\"notification\":{" +
                "\"body\":\"" + body.ToString() + "\"," +
                "\"image\":\"" + image.ToString() + "\"," +
                "\"title\":\"" + title.ToString() + "\"" +
                "},\"data\":{" +
                "\"key\":\"" + dataKey.ToString() + "\"," +
                "\"value\":\"" + dataValue.ToString() + "\"" +
                "}" +
            "}" +
        "}";
    streamWriter.Write(message);
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
    name = streamReader.ReadToEnd();
}

但是在 GetResponse 我收到 The remote server returned an error: (403) Forbidden. 我之前收到 401 错误（未授权）但那是因为我没有使用正确的访问密钥，我现在已经获得授权使用这个：

var scopes = new[] { "https://www.googleapis.com/auth/userinfo.email", "https://www.googleapis.com/auth/firebase.database" };

GoogleCredential credential;
using (var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read))
{
    credential = GoogleCredential.FromStream(stream).CreateScoped(scopes);
}
AccessToken = await credential.UnderlyingCredential.GetAccessTokenForRequestAsync();
return AccessToken;
}

我真的不确定我错过了什么，我已经为这个项目启用了所有必要的 Google 云 API。

Answer 1

(403) Forbidden 表示您已通过身份验证（您的令牌有效），但您无权访问 URL.

中的资源

Answer 2

向 oauth 方法添加另一个范围。 "https://www.googleapis.com/auth/firebase.messaging" 现在看起来很简单，但是这个 c# post 没有完整的位置。希望这可以帮助其他人使用这种方法。

var scopes = new[] { "https://www.googleapis.com/auth/firebase.messaging", "https://www.googleapis.com/auth/userinfo.email", "https://www.googleapis.com/auth/firebase.database" };

GoogleCredential credential;
using (var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read))
{
    credential = GoogleCredential.FromStream(stream).CreateScoped(scopes);
}
AccessToken = await credential.UnderlyingCredential.GetAccessTokenForRequestAsync();

尝试发送推送通知时出现 Firebase 403 禁止错误

Firebase 403 Forbidden Error on attempting to send Push Notification

c#

firebase

firebase-authentication

firebase-cloud-messaging

httpwebrequest