Buffer is a lightweight Docker project designed to serve as a wrapper for MariaDB databases. It exposes REST APIs allowing users to send SQL queries to a MariaDB database. This project also includes a custom function BUFFER_QUERY which enables the execution of SQL queries directly from Google Spreadsheet.

• Installation
• Usage
• Endpoints
• Custom Function
• Contributing
• License

• Docker
• Ngrok
• Google Spreadsheet
• MariaDB

To run Buffer locally, make sure you have Docker installed on your system. Then follow these steps:

1. Clone this repository:

   git clone https://github.com/javanile/google-spreadsheet-buffer.git
   

2. Navigate to the project directory:

   cd google-spreadsheet-buffer
   

3. Run the Docker container:

   make start
   

Buffer is now running locally on port 6612.

Please note: For testing in a public environment, remember to modify the BUFFER_PASSWORD variable in the docker-compose.yml file to ensure security.

To use Buffer, you can send HTTP requests to the exposed REST endpoints. Additionally, you can leverage the custom function BUFFER_QUERY directly from Google Spreadsheet to execute SQL queries on the database.

Please note that when using Buffer locally, you'll need to install Ngrok to expose the local container to your Google Sheets:

Install Ngrok on your system following the instructions provided on the Ngrok website. Run Ngrok and expose the local port where Buffer is running by executing the following command:

ngrok http 6612

Copy the Ngrok URL provided (e.g., https://randomstring.ngrok.io).

Configure Google Sheets to use the Ngrok URL as the endpoint for BUFFER_QUERY function.

With Ngrok set up, you can now interact with your local Buffer instance directly from your Google Spreadsheet!"

Run as standalone container

docker run -d -e BUFFER_PASSWORD=Secret1234! -p 6612:6612 javanile/buffer

Create table and insert data

export BUFFER_TOKEN=$(echo -n '{"password":"'${BUFFER_PASSWORD}'"}' | base64)

curl -H "Authorization: Bearer ${BUFFER_TOKEN}" localhost:6612 -d '
  CREATE TABLE my_table (
    my_field_1 VARCHAR(100),
    my_field_2 VARCHAR(100)
  );  
  INSERT INTO my_table (my_field_1, my_field_2) VALUES ("Hello", "World");
'

Execute query inside Google Spreadsheet

=BUFFER_QUERY("[email protected]"; "SELECT * FROM my_table")

The connection string for Buffer is as follows:

[protocol]:https://[username]:[password]@[host]:[port]/[database]

For example:

• "[email protected]" (default protocol and port)
• "https://MyBufferPassword@mybufferhost:6612" (custom protocol and port)
• "https://MyBufferUsername:MyBufferPassword@mybufferhost:6612/BufferDatabase" (full string)

Buffer includes a custom function BUFFER_QUERY which allows users to execute SQL queries directly from Google Spreadsheet. Simply include the function in your spreadsheet and provide the SQL query as an argument (Read mode).

function BUFFER_QUERY(url, query, options) {
  const accessToken = {};
  const regex = /^(?:([A-Za-z]+):\/\/)?(?:([A-Za-z0-9_]+):)?([A-Za-z0-9\-._~%!$&'()*+,;=]+)@([A-Za-z0-9.-]+)(?::([0-9]+))?(?:\/([A-Za-z0-9_]+))?$/;
  const match = url.match(regex);
  
  if (!match) {
    throw "Malformed url";
  }
  
  match[1] = String(match[1] || 'https').toLowerCase();
  match[5] = match[5] ? ':' + match[5] : (match[1] != 'https' ? ':6612' : '');

  accessToken.database = match[6] || (match[2] || "buffer");
  accessToken.username = match[2] || "buffer";
  accessToken.password = match[3];
  
  url = match[1] + ':https://' + match[4] + match[5] + '?options=' + options;    
  
  var response = UrlFetchApp.fetch(url, {
    headers: {
      "Authorization": "Bearer " + Utilities.base64Encode(JSON.stringify(accessToken)),
      "ngrok-skip-browser-warning": "69420"
    },
    payload: query
  });

  return JSON.parse(response.getContentText())
}

Contributions are welcome! Feel free to submit pull requests or open issues for any enhancements or bug fixes.

This project is licensed under the MIT License - see the LICENSE file for details.