Add Drive v3 API sample.

samples/drive/README.md

@@ -0,0 +1,39 @@
+# Drive v3 API Samples
+
+This samples allows you to download a single file from Google Drive.
+
+## Running the samples
+
+Set the following values in `secret.json` (up one directory):
+
+* `client_id`
+* `project_id`
+* `client_secret`
+
+__Run the `download.js` sample:__
+
+```
+node download.js <fileId>
+```
+
+where `<fileId>` is the id of any file in Google Drive.
+
+Example:
+
+```
+node download.js 0B_Klegupc5gUcXhFZjZVUV9NeE0
+```
+
+__Run the `export.js` sample:__
+
+```
+node export.js <fileId>=
+```
+
+where `<fileId>` is the id of a _Google Doc_ in Google Drive.
+
+Example:
+
+```
+node export.js 0B_Klegupc5gUcXhFZjZVUV9NeE0 ./file.pdf
+```

samples/drive/download.js

@@ -0,0 +1,79 @@
+// Copyright 2016, Google, Inc.
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+var google = require('../../');
+var sampleClient = require('../sampleclient');
+var fs = require('fs');
+
+var auth = sampleClient.oAuth2Client;
+
+var drive = google.drive({
+  version: 'v3',
+  auth: auth
+});
+
+function download (fileId, tokens) {
+  drive.files.get({
+    fileId: fileId
+  }, function (err, metadata) {
+    if (err) {
+      console.error(err);
+      return process.exit();
+    }
+
+    console.log('Downloading %s...', metadata.name);
+
+    auth.setCredentials(tokens);
+
+    var dest = fs.createWriteStream(metadata.name);
+
+    drive.files.get({
+      fileId: fileId,
+      alt: 'media'
+    })
+    .on('error', function (err) {
+      console.log('Error downloading file', err);
+      process.exit();
+    })
+    .pipe(dest);
+
+    dest
+      .on('finish', function () {
+        console.log('Downloaded %s!', metadata.name);
+        process.exit();
+      })
+      .on('error', function (err) {
+        console.log('Error writing file', err);
+        process.exit();
+      });
+  });
+}
+
+var scopes = [
+  'https://www.googleapis.com/auth/drive.metadata.readonly',
+  'https://www.googleapis.com/auth/drive.photos.readonly',
+  'https://www.googleapis.com/auth/drive.readonly'
+];
+
+if (module === require.main) {
+  var args = process.argv.slice(2);
+  if (!args[0]) {
+    throw new Error('fileId required!');
+  } else {
+    sampleClient.execute(scopes, function (tokens) {
+      download(args[0], tokens);
+    });
+  }
+}

samples/drive/export.js

@@ -0,0 +1,79 @@
+// Copyright 2016, Google, Inc.
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+'use strict';
+
+var google = require('../../');
+var sampleClient = require('../sampleclient');
+var fs = require('fs');
+
+var auth = sampleClient.oAuth2Client;
+
+var drive = google.drive({
+  version: 'v3',
+  auth: auth
+});
+
+function download (fileId, tokens) {
+  drive.files.get({
+    fileId: fileId
+  }, function (err, metadata) {
+    if (err) {
+      console.error(err);
+      return process.exit();
+    }
+
+    console.log('Downloading %s...', metadata.name);
+
+    auth.setCredentials(tokens);
+
+    var dest = fs.createWriteStream(metadata.name + '.pdf');
+
+    drive.files.export({
+      fileId: fileId,
+      mimeType: 'application/pdf'
+    })
+    .on('error', function (err) {
+      console.log('Error downloading file', err);
+      process.exit();
+    })
+    .pipe(dest);
+
+    dest
+      .on('finish', function () {
+        console.log('Downloaded %s!', metadata.name);
+        process.exit();
+      })
+      .on('error', function (err) {
+        console.log('Error writing file', err);
+        process.exit();
+      });
+  });
+}
+
+var scopes = [
+  'https://www.googleapis.com/auth/drive.metadata.readonly',
+  'https://www.googleapis.com/auth/drive.photos.readonly',
+  'https://www.googleapis.com/auth/drive.readonly'
+];
+
+if (module === require.main) {
+  var args = process.argv.slice(2);
+  if (!args[0]) {
+    throw new Error('fileId required!');
+  } else {
+    sampleClient.execute(scopes, function (tokens) {
+      download(args[0], tokens);
+    });
+  }
+}

samples/sampleclient.js

@@ -26,6 +26,30 @@ var url = require('url');
 var querystring = require('querystring');
 var secrets = require('./secrets.json');
 
+var called = false;
+
+function callOnce (callback) {
+  if (!called) {
+    called = true;
+    callback();
+  }
+}
+
+function handler (request, response, server, callback) {
+  var self = this;
+  var qs = querystring.parse(url.parse(request.url).query);
+  self.oAuth2Client.getToken(qs.code, function (err, tokens) {
+    if (err) {
+      console.error('Error getting oAuth tokens: ' + err);
+    }
+    self.oAuth2Client.setCredentials(tokens);
+    self.isAuthenticated = true;
+    response.end('Authentication successful! Please return to the console.');
+    callback(tokens);
+    server.close();
+  });
+}
+
 function SampleClient (options) {
   var self = this;
   self.isAuthenticated = false;
@@ -48,16 +72,8 @@ function SampleClient (options) {
       scope: scopes.join(' ')
     });
     var server = http.createServer(function (request, response) {
-      var qs = querystring.parse(url.parse(request.url).query);
-      self.oAuth2Client.getToken(qs.code, function (err, tokens) {
-        if (err) {
-          console.error('Error getting oAuth tokens: ' + err);
-        }
-        self.oAuth2Client.setCredentials(tokens);
-        self.isAuthenticated = true;
-        response.end('Authentication successful! Please return to the console.');
-        callback.apply();
-        server.close();
+      callOnce(function () {
+        handler.call(self, request, response, server, callback);
       });
     }).listen(8080, function () {
       // open the browser to the authorize url to start the workflow