Membership Application Uploader

This Go application handles the upload of CorrelAid membership applications to a Nextcloud instance.

Description of Functionality

When the application starts, it initializes configurations and environment variables, and establishes a connection to an in-memory database. The application creates a Gin router and applies middleware for rate limiting per IP and CORS. When a POST request is made to the server, the application's route handler is invoked. In the route handler, it

• first validates a token and client IP address using the Turnstile verify endpoint.
• Next, the application validates and processes the form data, including checking the file size and syntax checking the email. It performs a database lookup to check if the email already exists.
• Afterwards, the application uploads the file to a Nextcloud server using WebDAV. It inserts the email in the database to be able to check for duplicate emails in the future.

Development

1. Clone the repository.
2. Install the required packages using go get.
3. Set the necessary environment variables. Create a .env file that looks like this:

NEXTCLOUD_PW=pw
NEXTCLOUD_USER=user
WEBDAV_URL=https://nextloud_instance/remote.php/dav/files/user/applications
TURNSTILE_SECRET_KEY=secret
TEST_TOKEN=tst
MAX_FILE_SIZE=3145728 #3mb
MAX_REQUESTS_PER_MINUTE=5

4. Run the application using go run main.go.

Test

1. Existing email without token

curl -X POST http://localhost:8080 \
  -F "file=@foo.pdf" \
  -H "Content-Type: multipart/form-data" -F "name=Test Name" -F "email=test@example.com" -F "token=<your_test_token>"

2. New email without token

curl -X POST http://localhost:8080 \
  -F "file=@foo.pdf" \
  -H "Content-Type: multipart/form-data" -F "name=Test Name" -F "email=test2@example.com" -F "token=<your_test_token>"