我正在使用domain-wide delegation进行身份验证。
我正在收回如下所示的google云端硬盘服务：com.google.api.services.drive.Drive@6ebd27b9
这是我正在尝试检索的文件的链接：https://docs.google.com/a/rmi.org/document/d/1JRS8SLzaAD2U4cG-GbDMbVN25Dp6f_uUYyl6ERMPAno/edit
我将此值作为文件ID传递：1JRS8SLzaAD2U4cG-GbDMbVN25Dp6f_uUYyl6ERMPAno。
当代码到达此行时：File file = service.files().get(fileId).execute();
我收到此错误：
An error occured: com.google.api.client.googleapis.json.GoogleJsonResponseException: 404 OK
{
"code" : 404,
"errors" : [ {
"domain" : "global",
"message" : "File not found: 1JRS8SLzaAD2U4cG-GbDMbVN25Dp6f_uUYyl6ERMPAno",
"reason" : "notFound"
} ],
当我尝试使用this page底部的工具找到相关文件时，如果我打开Oauth 2.0，我会收到200响应代码和有关该文件的信息。
我在这里看了很多类似的问题，包括this问题，但我在设置权限的方式上看不出任何错误：
这是我获得驱动器服务的地方：
public static Drive getDriveService() throws GeneralSecurityException,
IOException, URISyntaxException {
HttpTransport httpTransport = new NetHttpTransport();
JacksonFactory jsonFactory = new JacksonFactory();
GoogleCredential credential = new GoogleCredential.Builder()
.setTransport(httpTransport)
.setJsonFactory(jsonFactory)
.setServiceAccountId(SERVICE_ACCOUNT_EMAIL)
//.setServiceAccountScopes(DriveScopes.DRIVE)
.setServiceAccountScopes(SCOPE)
.setServiceAccountPrivateKeyFromP12File(
new java.io.File(SERVICE_ACCOUNT_PKCS12_FILE_PATH))
.build();
Drive service = new Drive.Builder(httpTransport, jsonFactory, null)
.setHttpRequestInitializer(credential).build();
return service;
我将这些变量定义如下：
/** Email of the Service Account */
private static final String SERVICE_ACCOUNT_EMAIL = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxx@developer.gserviceaccount.com";
/** Path to the Service Account's Private Key file */
private static final String SERVICE_ACCOUNT_PKCS12_FILE_PATH = "/actualpathhere/HowToListing/war/resources/actualpd12filename.p12";
private static final List<String> SCOPE = Arrays.asList("https://www.googleapis.com/auth/drive.readonly");
以下是我尝试获取文件元数据的地方：
private static List<File> retrieveAllFiles(Drive service) throws IOException {
List<File> result = null;
try {
String fileId = "1JRS8SLzaAD2U4cG-GbDMbVN25Dp6f_uUYyl6ERMPAno";
File file = service.files().get(fileId).execute();
System.out.println("Title: " + file.getTitle());
System.out.println("Description: " + file.getDescription());
System.out.println("MIME type: " + file.getMimeType());
} catch (IOException e) {
System.out.println("An error occured: " + e);
}
return result;
}
任何人都可以给我任何关于可能发生的事情的提示吗？
答案 0 :(得分：1)
<强> EDITED
事实证明，所有的安全都是红鲱鱼。缺少的关键是有效用户的电子邮件地址。首先，功能代码：import java.io.IOException;
import java.net.URL;
import java.security.GeneralSecurityException;
import java.util.Arrays;
import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.drive.Drive;
import com.google.api.services.drive.DriveScopes;
import com.google.api.services.drive.model.File;
public class DriveCommandLine {
private static String SERVICE_ACCOUNT_EMAIL = "11111-abc123@developer.gserviceaccount.com";
private static final String SERVICE_ACCOUNT_PKCS12_FILE_NAME = "a_file_name.p12";
private static String SERVICE_ACCOUNT_PKCS12_FILE_PATH;
public static void main(String[] args) throws IOException {
try {
//I did this stuff for the p12 file b/c I was having trouble doing this all from command line (first time)
URL location = DriveCommandLine.class.getProtectionDomain().getCodeSource().getLocation();
SERVICE_ACCOUNT_PKCS12_FILE_PATH = location.getFile() + SERVICE_ACCOUNT_PKCS12_FILE_NAME;
Drive drive = DriveCommandLine.getDriveService("valid-user@example.com");
DriveCommandLine.printFile(drive, "THE_ID_OF_THE_FILE");
} catch (GeneralSecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//From https://developers.google.com/drive/web/delegation#instantiate_a_drive_service_object
/**
* Build and returns a Drive service object authorized with the service accounts
* that act on behalf of the given user.
*
* @param userEmail The email of the user.
* @return Drive service object that is ready to make requests.
*/
public static Drive getDriveService(String userEmail) throws GeneralSecurityException, IOException {
HttpTransport httpTransport = new NetHttpTransport();
JacksonFactory jsonFactory = new JacksonFactory();
GoogleCredential credential = new GoogleCredential.Builder().setTransport(httpTransport)
.setJsonFactory(jsonFactory)
.setServiceAccountId(SERVICE_ACCOUNT_EMAIL)
.setServiceAccountScopes(Arrays.asList(new String[] {DriveScopes.DRIVE}))
.setServiceAccountUser(userEmail)
.setServiceAccountPrivateKeyFromP12File(new java.io.File(SERVICE_ACCOUNT_PKCS12_FILE_PATH))
.build();
Drive service = new Drive.Builder(httpTransport, jsonFactory, null).setHttpRequestInitializer(credential).build();
return service;
}
// From the code box at https://developers.google.com/drive/v2/reference/files/get
/**
* Print a file's metadata.
*
* @param service Drive API service instance.
* @param fileId ID of the file to print metadata for.
*/
private static void printFile(Drive service, String fileId) {
try {
File file = service.files().get(fileId).execute();
System.out.println("Title: " + file.getTitle());
System.out.println("Description: " + file.getDescription());
System.out.println("MIME type: " + file.getMimeType());
} catch (IOException e) {
System.out.println("An error occured: " + e);
}
}
}
缺少的行是setServiceAccountUser(userEmail)，适用于有效的系统用户。
对于有效用户，我收到了文件详细信息。
如果用户无效，我就
了An error occured: com.google.api.client.auth.oauth2.TokenResponseException: 400 Bad Request
{
"error" : "invalid_grant",
"error_description" : "Not a valid email."
}
并且，如果用户没有访问权限或者没有设置该行，我得到了
An error occured: com.google.api.client.googleapis.json.GoogleJsonResponseException: 404 Not Found
{
"code" : 404,
"errors" : [ {
"domain" : "global",
"message" : "File not found: THE_FILE_ID",
"reason" : "notFound"
} ],
"message" : "File not found: THE_FILE_ID"
}
注意：请确保您遵循Perform Google Apps Domain-Wide Delegation of Authority的每个小步骤，因为这是我最终获得解决方案和所有正确的密钥（不需要我最初想的那么多！）< / p>