谷歌App Engine应用程序无法访问谷歌云存储桶

Question

...
GcsService gcsService = GcsServiceFactory.createGcsService();
GcsFilename file = new GcsFilename(getGcsDefaultBucketName(), fileName);
GcsFileOptions.Builder builder = new GcsFileOptions.Builder();
GcsFileOptions options = builder.mimeType(mimeType).build();     
GcsOutputChannel channel = gcsService.createOrReplace(file, options); //erroring in this line
...

: com.google.appengine.tools.cloudstorage.NonRetriableException: java.lang.RuntimeException: Server replied with 403, verify ACLs are set correctly on the object and bucket: Request: POST https://storage.googleapis.com/1-ebilly.appspot.com/SERVICESTAGEREPORT-DEVICENAME-LYF2-CREATEDDATE-01012017-CREATEDDATE-19022017-.ZIP
: User-Agent: AppEngine-Java-GCS
: Content-Length: 0
: x-goog-resumable: start
: Content-Type: application/zip
: 
: no content: Response: 403 with 212 bytes of content
: X-GUploader-UploadID: AEnB2Upq0Lhtfy5pbt06pVib8J0-L0XiGqW4JpB0G9PL87keY3WV7RCMVLCPeclD-D4UATEddvvwpAG2qeeIxUJx--brKxdQFw
: Content-Type: application/xml; charset=UTF-8
: Content-Length: 212
: Vary: Origin
: <?xml version='1.0' encoding='UTF-8'?><Error><Code>AccessDenied</Code><Message>Access denied.</Message><Details>Caller does not have storage.objects.create access to bucket myprojectID.appspot.com.</Details></Error>
: 
:   at com.google.appengine.tools.cloudstorage.RetryHelper.doRetry(RetryHelper.java:120)
:   at com.google.appengine.tools.cloudstorage.RetryHelper.runWithRetries(RetryHelper.java:166)
:   at com.google.appengine.tools.cloudstorage.RetryHelper.runWithRetries(RetryHelper.java:156)
:   at com.google.appengine.tools.cloudstorage.GcsServiceImpl.createOrReplace(GcsServiceImpl.java:70)

Answer 1

通过为appengine项目添加IAM permissin解决了该问题。在阅读了IAM“项目级别的访问控制”文档并比较了旧的项目和新的项目权限后，我们知道在旧的项目中找不到Appengine项目级别权限。添加权限后，相同的代码开始访问默认bucket。

修复前的IAM权限截图

修复后的IAM权限截图