驗證不記名符記

注意： 根據預設，系統不會傳送授權標頭中的不記名權杖。如需傳送不記名權杖權杖，請在向 Google 註冊時索取該權杖。

Bearer Token 會在每個應用程式內動作 HTTP 要求的 Authorization 標頭中設定。例如：

POST /approve?expenseId=abc123 HTTP/1.1
Host: your-domain.com
Authorization: Bearer AbCdEf123456
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/1.0 (KHTML, like Gecko; Gmail Actions)

confirmed=Approved

上述範例中的字串「AbCdEf123456」是不記名授權權杖。 這是 Google 產生的加密編譯權杖。透過動作傳送的所有不記名權杖都會包含 azp (授權方) 欄位為 [e-mail]，而 audience 欄位則會將寄件者網域指定為 https:// 表單的網址。舉例來說，如果電子郵件來自 [e-mail]，則目標對象為 https://example.com。

如果使用不記名權杖，請確認要求是來自 Google，且適用於寄件者網域。如果權杖未通過驗證，服務應透過 HTTP 回應代碼 401 (Unauthorized) 回應要求。

不記名權杖屬於 OAuth V2 標準的一部分，並由 Google API 廣泛採用。

驗證不記名權杖

我們建議服務使用開放原始碼的 Google API 用戶端程式庫來驗證不記名權杖：

• Java：https://github.com/google/google-api-java-client
• Python：https://github.com/google/google-api-python-client

• .NET：https://github.com/google/google-api-dotnet-client

Java

import java.io.IOException;
import java.security.GeneralSecurityException;
import java.util.Collections;

import com.google.api.client.googleapis.auth.oauth2.GoogleIdToken;
import com.google.api.client.googleapis.auth.oauth2.GoogleIdTokenVerifier;
import com.google.api.client.http.apache.ApacheHttpTransport;
import com.google.api.client.json.jackson2.JacksonFactory;

public class TokenVerifier {
    // Bearer Tokens from Gmail Actions will always be issued to this authorized party.
    private static final String GMAIL_AUTHORIZED_PARTY = "[e-mail]";

    // Intended audience of the token, based on the sender's domain
    private static final String AUDIENCE = "https://example.com";

    public static void main(String[] args) throws GeneralSecurityException, IOException {
        // Get this value from the request's Authorization HTTP header.
        // For example, for "Authorization: Bearer AbCdEf123456" use "AbCdEf123456"
        String bearerToken = "AbCdEf123456";

        GoogleIdTokenVerifier verifier = new GoogleIdTokenVerifier.Builder(new ApacheHttpTransport(), new JacksonFactory())
                .setAudience(Collections.singletonList(AUDIENCE))
                .build();

        GoogleIdToken idToken = verifier.verify(bearerToken);
        if (idToken == null || !idToken.getPayload().getAuthorizedParty().equals(GMAIL_AUTHORIZED_PARTY)) {
            System.out.println("Invalid token");
            System.exit(-1);
        }

        // Token originates from Google and is targeted to a specific client.
        System.out.println("The token is valid");

        System.out.println("Token details:");
        System.out.println(idToken.getPayload().toPrettyString());
    }
}

Python

import sys

from oauth2client import client

# Bearer Tokens from Gmail Actions will always be issued to this authorized party.
GMAIL_AUTHORIZED_PARTY = '[e-mail]'

# Intended audience of the token, based on the sender's domain
AUDIENCE = 'https://example.com'

try:
  # Get this value from the request's Authorization HTTP header.
  # For example, for "Authorization: Bearer AbCdEf123456" use "AbCdEf123456"
  bearer_token = 'AbCdEf123456'

  # Verify valid token, signed by google.com, intended for a third party.
  token = client.verify_id_token(bearer_token, AUDIENCE)
  print('Token details: %s' % token)

  if token['azp'] != GMAIL_AUTHORIZED_PARTY:
    sys.exit('Invalid authorized party')
except:
  sys.exit('Invalid token')

# Token originates from Google and is targeted to a specific client.
print('The token is valid')