Node-RedからGoogle Driveに画像ファイルをアップロードする

1. Google Developer Consoleで APIの有効化・サービスアカウント作成し、JSONファイルをダウンロード

※参考記事

1-1. Google Developer Consoleにアクセスする

1-2. 上部メニューのプロジェクトを選択を選ぶ

1-3. 新しいプロジェクトをクリック

1-4. プロジェクト名を入力して作成ボタンを押す

1-5. 作成したプロジェクトを選択し、Google Drive APIを有効にする

1-6. サービスアカウントを作成

1-7. サービスアカウントの編集画面から鍵を作成しJSONファイルをダウンロードする

2. Google Driveでフォルダを作成し、フォルダを先ほど作成したサービスアカウントに共有する

3.作成したフォルダのURLからフォルダIDを取得

4. Node-Redのパレットから「node-red-contrib-google」ノードをインストール

5. フローを読み込み、各ノードブロックのプロパティを設定する

[{"id":"37fe8973.9b3846","type":"change","z":"d7300f51.c03af","name":"set parameters","rules":[{"t":"set","p":"folderid","pt":"msg","to":"","tot":"str"},{"t":"set","p":"filename","pt":"msg","to":"test.jpg","tot":"str"},{"t":"set","p":"mimeType","pt":"msg","to":"image/jpg","tot":"str"},{"t":"set","p":"payload","pt":"msg","to":"{\t    \"resource\": {\t        \"name\": filename,\t        \"parents\": [\t            folderid\t        ]\t    },\t    \"media\": {\t        \"mimeType\": mimeType,\t        \"body\": payload\t    },\t    \"fields\": \"id\"\t}","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":320,"y":140,"wires":[["d862bfac.a32a7"]]},{"id":"39a1f760.f13da8","type":"debug","z":"d7300f51.c03af","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","x":630,"y":140,"wires":[]},{"id":"d862bfac.a32a7","type":"google","z":"d7300f51.c03af","name":"","google":"be4a5517.9547d8","api":"drive:v3","operation":"files.create","x":470,"y":140,"wires":[["39a1f760.f13da8"]]},{"id":"caf7c056.9ef8d","type":"file in","z":"d7300f51.c03af","name":"","filename":"","format":"","chunk":false,"sendError":false,"encoding":"none","x":470,"y":80,"wires":[["37fe8973.9b3846"]]},{"id":"7d1550df.83376","type":"change","z":"d7300f51.c03af","name":"","rules":[{"t":"set","p":"filename","pt":"msg","to":"/home/pi/Pictures/test/test.jpg","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":310,"y":80,"wires":[["caf7c056.9ef8d"]]},{"id":"e8c966be.6e9248","type":"inject","z":"d7300f51.c03af","name":"","repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":120,"y":80,"wires":[["7d1550df.83376"]]},{"id":"be4a5517.9547d8","type":"google-conn","z":"","name":"Google","key":"{}\n","scopes":"https://www.googleapis.com/auth/drive\nhttps://www.googleapis.com/auth/drive.appdata\nhttps://www.googleapis.com/auth/drive.file\nhttps://www.googleapis.com/auth/drive.metadata\nhttps://www.googleapis.com/auth/drive.metadata.readonly\nhttps://www.googleapis.com/auth/drive.photos.readonly\nhttps://www.googleapis.com/auth/drive.readonly\nhttps://www.googleapis.com/auth/drive.scripts"}]

googleノードブロック：JSON Keyを手順1-7で取得したJSONファイルの内容で設定

「set parameters」ブロック：「folderid」に手順3で取得したフォルダIDを設定

「set msg.filename」ブロック：送信対象の画像ファイルのパスを設定

6. injectノードを実行してGoogle Driveにファイルがアップロードされていることを確認