# Rift
**High-performance Mountebank-compatible HTTP/HTTPS mock server written in Rust**
[](https://github.com/EtaCassiopeia/rift)
[](LICENSE)
[](https://www.rust-lang.org/)
Rift is a high-performance, [Mountebank](http://www.mbtest.org/)-compatible mock server that delivers **2-250x better performance**. Use your existing Mountebank configurations and enjoy faster test execution.
---
## Why Rift?
### Mountebank Compatible
- **Same REST API** - Works with existing Mountebank clients and tooling
- **Same Configuration** - Load your `imposters.json` without changes
- **Same Behavior** - Predicates, responses, behaviors all work identically
### Blazing Fast Performance
| Simple stubs | 1,900 RPS | 39,000 RPS | **20x faster** |
| JSONPath predicates | 107 RPS | 26,500 RPS | **247x faster** |
| XPath predicates | 169 RPS | 28,700 RPS | **170x faster** |
| Complex predicates | 900 RPS | 29,300 RPS | **32x faster** |
### Full Feature Support
- **Imposters** - HTTP/HTTPS mock servers
- **Predicates** - equals, contains, matches, exists, jsonpath, xpath, and, or, not
- **Responses** - Static, proxy, injection
- **Behaviors** - wait, decorate, copy, lookup
- **Proxy Mode** - Record and replay
---
## Quick Start
### Run with Docker
```bash
# Pull and run (from GitHub Container Registry)
docker pull ghcr.io/etacassiopeia/rift-proxy:latest
docker run -p 2525:2525 ghcr.io/etacassiopeia/rift-proxy:latest
# Or from Docker Hub
docker pull etacassiopeia/rift-proxy:latest
# Create your first imposter
curl -X POST http://localhost:2525/imposters \
-H "Content-Type: application/json" \
-d '{
"port": 4545,
"protocol": "http",
"stubs": [{
"predicates": [{ "equals": { "path": "/hello" } }],
"responses": [{ "is": { "statusCode": 200, "body": "Hello, World!" } }]
}]
}'
# Test it
curl http://localhost:4545/hello
```
### Use Existing Mountebank Config
```bash
# Load your existing imposters.json
docker run -p 2525:2525 -v $(pwd)/imposters.json:/imposters.json \
ghcr.io/etacassiopeia/rift-proxy:latest --configfile /imposters.json
```
---
## Installation
### Docker (Recommended)
```bash
# GitHub Container Registry (recommended)
docker pull ghcr.io/etacassiopeia/rift-proxy:latest
# Or Docker Hub
docker pull etacassiopeia/rift-proxy:latest
```
### Homebrew (macOS/Linux)
```bash
brew tap etacassiopeia/rift
brew install rift
```
### Cargo (crates.io)
```bash
cargo install rift-http-proxy
```
### Download Binary
Download pre-built binaries from [GitHub Releases](https://github.com/EtaCassiopeia/rift/releases):
```bash
# Example for Linux x86_64
curl -LO https://github.com/EtaCassiopeia/rift/releases/latest/download/rift-vX.X.X-x86_64-unknown-linux-gnu.tar.gz
tar -xzf rift-vX.X.X-x86_64-unknown-linux-gnu.tar.gz
sudo mv rift-vX.X.X-x86_64-unknown-linux-gnu/bin/* /usr/local/bin/
```
Available platforms:
- Linux: `x86_64-unknown-linux-gnu`, `aarch64-unknown-linux-gnu`, `x86_64-unknown-linux-musl`, `aarch64-unknown-linux-musl`
- macOS: `x86_64-apple-darwin`, `aarch64-apple-darwin`
- Windows: `x86_64-pc-windows-msvc`
### Build from Source
```bash
git clone https://github.com/EtaCassiopeia/rift.git
cd rift
cargo build --release
./target/release/rift-http-proxy
```
### Node.js / npm
For Node.js projects, use the official npm package:
```bash
npm install @rift-vs/rift
```
```javascript
import rift from '@rift-vs/rift';
const server = await rift.create({ port: 2525 });
// Create imposters, run tests...
await server.close();
```
---
## Documentation
### Getting Started
- [Installation](https://etacassiopeia.github.io/rift/getting-started/) - Docker, binary, build from source
- [Quick Start](https://etacassiopeia.github.io/rift/getting-started/quickstart/) - Create your first imposter
- [Node.js Integration](https://etacassiopeia.github.io/rift/getting-started/nodejs/) - npm package for Node.js
- [Migration Guide](https://etacassiopeia.github.io/rift/getting-started/migration/) - Using Rift with Mountebank configs
### Mountebank Compatibility
- [Imposters](https://etacassiopeia.github.io/rift/mountebank/imposters/) - Mock server configuration
- [Predicates](https://etacassiopeia.github.io/rift/mountebank/predicates/) - Request matching
- [Responses](https://etacassiopeia.github.io/rift/mountebank/responses/) - Response configuration
- [Behaviors](https://etacassiopeia.github.io/rift/mountebank/behaviors/) - wait, decorate, copy
- [Proxy Mode](https://etacassiopeia.github.io/rift/mountebank/proxy/) - Record and replay
### Configuration
- [Mountebank Format](https://etacassiopeia.github.io/rift/configuration/mountebank/) - JSON configuration
- [Native Rift Format](https://etacassiopeia.github.io/rift/configuration/native/) - YAML for advanced features
- [CLI Reference](https://etacassiopeia.github.io/rift/configuration/cli/) - Command-line options
### Features
- [Fault Injection](https://etacassiopeia.github.io/rift/features/fault-injection/) - Chaos engineering
- [Scripting](https://etacassiopeia.github.io/rift/features/scripting/) - Rhai, Lua, JavaScript
- [TLS/HTTPS](https://etacassiopeia.github.io/rift/features/tls/) - Secure connections
- [Metrics](https://etacassiopeia.github.io/rift/features/metrics/) - Prometheus integration
- [TUI](https://etacassiopeia.github.io/rift/features/tui/) - Interactive terminal interface
### Deployment
- [Docker](https://etacassiopeia.github.io/rift/deployment/docker/) - Container deployment
- [Kubernetes](https://etacassiopeia.github.io/rift/deployment/kubernetes/) - K8s patterns
### Reference
- [REST API](https://etacassiopeia.github.io/rift/api/) - Admin API reference
- [Performance](https://etacassiopeia.github.io/rift/performance/) - Benchmarks
---
## Example
```json
{
"port": 4545,
"protocol": "http",
"name": "User Service",
"stubs": [
{
"predicates": [{ "equals": { "method": "GET", "path": "/users" } }],
"responses": [{
"is": {
"statusCode": 200,
"headers": { "Content-Type": "application/json" },
"body": [{ "id": 1, "name": "Alice" }]
}
}]
},
{
"predicates": [{
"and": [
{ "equals": { "method": "GET" } },
{ "matches": { "path": "/users/\\d+" } }
]
}],
"responses": [{
"is": { "statusCode": 200, "body": { "id": 1, "name": "Alice" } }
}]
}
]
}
```
More examples in [`examples/`](examples/).
---
## Metrics
Prometheus metrics on `:9090/metrics`:
```bash
curl http://localhost:9090/metrics
```
Metrics include request counts, latency histograms, fault injection stats, and more.
---
## CLI Tools
Rift includes additional command-line tools. All tools are included when you install via Homebrew or download release binaries.
### rift-tui - Interactive Terminal UI
Manage imposters and stubs through an interactive terminal interface:
```bash
# If installed via Homebrew or release binary
rift-tui
# Connect to a different admin URL
rift-tui --admin-url http://localhost:2525
```
Features:
- View and manage imposters with vim-style navigation (j/k)
- Create, edit, and delete stubs with JSON editor
- Generate curl commands for testing stubs
- Import/export imposter configurations
- Search and filter imposters and stubs
- Real-time metrics dashboard
### rift-verify - Stub Verification
Automatically test your imposters by generating requests from predicates:
```bash
rift-verify --show-curl
```
### rift-lint - Configuration Linter
Validate imposter configuration files before loading:
```bash
# If installed via Homebrew or release binary
rift-lint ./imposters/
# Via Docker (for CI/CD)
docker run --rm -v $(pwd):/imposters ghcr.io/etacassiopeia/rift-lint .
# Via cargo
cargo install rift-lint
rift-lint ./imposters/
```
---
## Development
```bash
# Build
cargo build --release
# Run tests
cargo test --all
# Run with debug logging
RUST_LOG=debug ./target/release/rift-http-proxy
# Run benchmarks
cd tests/benchmark && ./scripts/run-benchmark.sh
```
---
## Contributing
Contributions welcome! Please read our contributing guidelines and submit PRs.
---
## License
Apache License 2.0 - see [LICENSE](LICENSE) for details.
---
## Acknowledgments
- [Mountebank](http://www.mbtest.org/) - The original service virtualization tool that inspired Rift's API and configuration format