QWC Permalink Service

Stores and resolves compact permalinks for the Web Client.

Permalinks are stored in a database table.

Configuration

The static config files are stored as JSON files in $CONFIG_PATH with subdirectories for each tenant, e.g. $CONFIG_PATH/default/*.json. The default tenant name is default.

JSON config

• JSON schema
• File location: $CONFIG_PATH/<tenant>/permalinkConfig.json

Example:

{
  "$schema": "https://raw.githubusercontent.com/qwc-services/qwc-permalink-service/master/schemas/qwc-permalink-service.json",
  "service": "permalink",
  "config": {
    "db_url": "postgresql:///?service=qwc_configdb",
    "permalinks_table": "qwc_config.permalinks",
    "user_permalink_table": "qwc_config.user_permalinks"
  }
}

Environment variables

Config options in the config file can be overridden by equivalent uppercase environment variables.

Variable	Default value	Description
DB_URL	postgresql:///?service=qwc_configdb	DB connection URL [1]
PERMALINKS_TABLE	qwc_config.permalinks	Permalink table
USER_PERMALINK_TABLE	qwc_config.user_permalinks	User permalink table

[1] https://docs.sqlalchemy.org/en/13/core/engines.html#postgresql

If you don't use qwc-config-db you have to create the tables for storing permalinks first. Example:

CREATE TABLE permalinks
(
  key character(10) NOT NULL PRIMARY KEY,
  data text,
  date date,
  expires date
);

Usage

Base URL:

http://localhost:5018/

API documentation:

http://localhost:5018/api/

Docker usage

See sample docker-compose.yml of qwc-docker.

Development

Set the CONFIG_PATH environment variable to the path containing the service config and permission files when starting this service (default: config).

export CONFIG_PATH=../qwc-docker/volumes/config

Configure environment:

echo FLASK_ENV=development >.flaskenv

Install dependencies and run service:

uv run src/server.py