Mercury

A high-performance, monolithic Rust API with a dynamic CRUD engine, query registry cache, JWT bitmask permissions, and a Vue 3 admin frontend.

Quick Start

cp .env.example .env          # set JWT_SECRET
docker compose up --build

API: http://localhost:3000/api
Admin UI: http://localhost:3000
Default credentials: admin / admin

---

API Contract

Authentication

POST /auth/login
Body: { "username": "...", "password": "..." }
Returns: { "token": "<JWT>" }

All admin routes require Authorization: Bearer <token>.

---

CRUD — Dynamic Table Access

Requests are mapped to the named PostgreSQL table. The SQL is generated, cached, and executed automatically.

GET    /api/{table}              List all rows (supports ?col=val filters)
GET    /api/{table}/{id}         Get row by id
POST   /api/{table}              Insert row (JSON body)
PUT    /api/{table}/{id}         Update row by id (JSON body)
DELETE /api/{table}/{id}         Delete row by id

Notes:

• users and permissions tables are blacklisted from public CRUD — use the admin suite.
• Filters are ANDed together: GET /api/orders?status=open&priority=high

---

Admin — Query Registry

Requires JWT with ADMIN_QUERY permission (bit 8).

GET    /admin/queries                          List all registered queries
POST   /admin/queries                          Register a raw SQL template
GET    /admin/queries/{identifier}             Get query by slug
PUT    /admin/queries/{identifier}             Update SQL template or description
DELETE /admin/queries/{identifier}             Remove query (evicts from cache)
GET    /admin/queries/{identifier}/execute     Execute query with ?param=val bindings

SQL templates use :param_name placeholders:

SELECT * FROM orders WHERE user_id = :user_id AND status = :status

---

Admin — Cache

Requires JWT with ADMIN_CACHE permission (bit 16).

GET    /admin/cache/stats    Cache size, hit count, miss count
DELETE /admin/cache          Flush entire cache

---

Admin — Users

Requires JWT with SUPER_ADMIN permission (bit 32).

GET    /admin/users                                   List users
POST   /admin/users                                   Create user
GET    /admin/users/{id}                              Get user
PUT    /admin/users/{id}                              Update user
DELETE /admin/users/{id}                              Delete user
POST   /admin/users/{id}/permissions/grant/{bit}      OR bit into permissions mask
DELETE /admin/users/{id}/permissions/revoke/{bit}     AND NOT bit from permissions mask

---

Admin — Permissions

Requires JWT with SUPER_ADMIN permission (bit 32).

GET    /admin/permissions          List permission definitions
POST   /admin/permissions          Create custom permission (auto-assigns next bit)
PUT    /admin/permissions/{id}     Update name/description
DELETE /admin/permissions/{id}     Remove permission

---

Admin — Route Blacklist

Requires JWT with SUPER_ADMIN permission (bit 32). Changes take effect immediately in memory.

GET    /admin/blacklist          List all entries
POST   /admin/blacklist          Add glob pattern
PUT    /admin/blacklist/{id}     Update entry (set active: false to disable)
DELETE /admin/blacklist/{id}     Remove entry

Pattern syntax: * matches one path segment, ** matches many.
Example: /api/sensitive/** blocks all methods under that path.

---

Permission Bitmask

Name	Bit	Value
READ	0	1
WRITE	1	2
DELETE	2	4
ADMIN_QUERY	3	8
ADMIN_CACHE	4	16
SUPER_ADMIN	5	32

Custom permissions are added via the admin suite and assigned the next available power-of-2 bit. Masks support up to 128 bits (u128).

---

Configuration

Variable	Default	Description
DATABASE_URL	required	PostgreSQL connection string
JWT_SECRET	required	HMAC-HS256 signing secret
JWT_EXPIRY_SECS	3600	Token lifetime in seconds
CACHE_MAX_CAPACITY	10000	Max query templates in memory
CACHE_IDLE_TIMEOUT_SECS	300	Evict after N seconds idle
CACHE_SWEEP_INTERVAL_SECS	60	Sweep interval for eviction task

---

Development

# API only (requires local Postgres)
cargo run

# UI dev server (proxies to local API)
cd ui && npm install && npm run dev

# Full stack
docker compose up --build

Stack

• API: Rust, Axum, SQLx, PostgreSQL, DashMap, jsonwebtoken, bcrypt
• Frontend: Vue 3, Vite, @nychthemeron/library (dark mode default)
• Infra: Docker multi-stage build, docker compose