github.com/slspeek/camlistore_namedsearch@v0.0.0-20140519202248-ed6f70f7721a/pkg/blobserver/google/drive/drive.go (about)

     1  /*
     2  Copyright 2013 Google Inc.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8       http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  /*
    18  Package drive registers the "googledrive" blobserver storage
    19  type, storing blobs in a Google Drive folder.
    20  
    21  Example low-level config:
    22  
    23      "/storage-googledrive/": {
    24        "handler": "storage-googledrive",
    25        "handlerArgs": map[string]interface{}{
    26          "parent_id": parentId,
    27          "auth": map[string]interface{}{
    28            "client_id":     clientId,
    29            "client_secret": clientSecret,
    30            "refresh_token": refreshToken,
    31          },
    32        },
    33      },
    34  */
    35  package drive
    36  
    37  import (
    38  	"net/http"
    39  	"time"
    40  
    41  	"camlistore.org/pkg/blobserver"
    42  	"camlistore.org/pkg/blobserver/google/drive/service"
    43  	"camlistore.org/pkg/jsonconfig"
    44  	"camlistore.org/third_party/code.google.com/p/goauth2/oauth"
    45  )
    46  
    47  const (
    48  	GoogleOAuth2AuthURL  = "https://accounts.google.com/o/oauth2/auth"
    49  	GoogleOAuth2TokenURL = "https://accounts.google.com/o/oauth2/token"
    50  )
    51  
    52  type driveStorage struct {
    53  	service *service.DriveService
    54  }
    55  
    56  func newFromConfig(_ blobserver.Loader, config jsonconfig.Obj) (blobserver.Storage, error) {
    57  	auth := config.RequiredObject("auth")
    58  	oauthConf := &oauth.Config{
    59  		ClientId:     auth.RequiredString("client_id"),
    60  		ClientSecret: auth.RequiredString("client_secret"),
    61  		AuthURL:      GoogleOAuth2AuthURL,
    62  		TokenURL:     GoogleOAuth2TokenURL,
    63  	}
    64  
    65  	// force refreshes the access token on start, make sure
    66  	// refresh request in parallel are being started
    67  	transport := &oauth.Transport{
    68  		Token: &oauth.Token{
    69  			AccessToken:  "",
    70  			RefreshToken: auth.RequiredString("refresh_token"),
    71  			Expiry:       time.Now(),
    72  		},
    73  		Config:    oauthConf,
    74  		Transport: http.DefaultTransport,
    75  	}
    76  	parent := config.RequiredString("parent_id")
    77  	if err := config.Validate(); err != nil {
    78  		return nil, err
    79  	}
    80  	service, err := service.New(transport, parent)
    81  	sto := &driveStorage{
    82  		service: service,
    83  	}
    84  	return sto, err
    85  }
    86  
    87  func init() {
    88  	blobserver.RegisterStorageConstructor("googledrive", blobserver.StorageConstructor(newFromConfig))
    89  }