使用java將文件從谷歌應用引擎上傳到谷歌驅動器

Question

我已成功從電子郵件收到 pdf 文件，但我必須將該 Pdf 文件存儲到谷歌驅動器中。這是我的代碼

private static void uploadFile(InputStream is) {

             com.google.api.services.drive.model.File fileMetadata = new com.google.api.services.drive.model.File();
             fileMetadata.setTitle(fileName);
             fileMetadata.setMimeType("application/pdf");

             HttpTransport httpTransport = new NetHttpTransport();
             JsonFactory jsonFactory = new JacksonFactory();
             AppIdentityCredential credential = new AppIdentityCredential.Builder(Arrays.asList(DriveScopes.DRIVE)).build();
             // API_KEY is from the Google Console as a server API key
             GoogleClientRequestInitializer keyInitializer = new CommonGoogleClientRequestInitializer("My API_key here");
             Drive service = new Drive.Builder(httpTransport, jsonFactory, null)

                 .setApplicationName("My app name here")
                 .setHttpRequestInitializer(credential)
                 .setGoogleClientRequestInitializer(keyInitializer)
                 .build();

             try {
                Drive.Files.Insert in= service.files().insert(fileMetadata, new InputStreamContent("application/pdf",is));
                com.google.api.services.drive.model.File retFile =in.execute();
                if(retFile!=null){
                    System.out.println("Drive retFile:"+retFile.getTitle());    
                }
            } catch (IOException e) {
                System.out.println("Drive Error:"+e.toString());
            }
          }

我檢查了關聯帳戶 Google Drive 沒有上傳任何內容。

我在過去 1 周內用谷歌搜索過，我沒有找到任何明確的文檔將文件從 GAE 上傳到谷歌潛水。

提前致謝...

Answer 1

最后我找到了解決方案，首先我們需要了解 GAE 服務帳戶和關聯的 Google 帳戶具有單獨的驅動器存儲。

我上面的代碼將文件存儲到 GAE 服務帳戶驅動器（沒有 UI 的服務帳戶），因此它對我們關聯的 Google 帳戶不可見。

所以我們需要將服務帳戶文件共享到關聯的 Google 帳戶。這是我修改后的代碼

private static void uploadFile(InputStream is) {

            com.google.api.services.drive.model.File fileMetadata = new com.google.api.services.drive.model.File();
            fileMetadata.setTitle(curDateWithFormat()+"-"+fileName);
            fileMetadata.setMimeType("application/pdf");


             HttpTransport httpTransport = new NetHttpTransport();
             JsonFactory jsonFactory = new JacksonFactory();
             AppIdentityCredential credential = new AppIdentityCredential.Builder(Arrays.asList(DriveScopes.DRIVE)).build();
             // API_KEY is from the Google Console as a server API key
             GoogleClientRequestInitializer keyInitializer = new CommonGoogleClientRequestInitializer("AIzaSyCKLTs_D2zYJepjno8OSVy-2CItYayvu0M");
             Drive service = new Drive.Builder(httpTransport, jsonFactory, null)

                 .setApplicationName("TimesheetPDFParser")
                 .setHttpRequestInitializer(credential)
                 .setGoogleClientRequestInitializer(keyInitializer)
                 .build();

             try {
                Drive.Files.Insert in= service.files().insert(fileMetadata, new InputStreamContent("application/pdf",is));
                com.google.api.services.drive.model.File retFile =in.execute();

                if(retFile!=null){
                    Permission newPermission = new Permission();
                    newPermission.setValue("here your email id @gmail.com");
                    newPermission.setType("user");
                    newPermission.setRole("reader");//owner and writer role throws 400 BAD_REQUEST exception    
                    service.permissions().insert(retFile.getId(), newPermission).execute();

                    System.out.println("Drive retFile:"+retFile.getId());   
                }
            } catch (IOException e) {
                System.out.println("Drive Error:"+e.toString());
            }
          }    

現在您可以在與我共享選項的共享帳戶驅動器中看到您的文件。

引用自：

https://developers.google.com/drive/v2/reference/permissions/insert