mikkelhegn / sqlite-proxy

sqlite-proxy

This repo is an example of how to compose a proxy component to intercept sqlite executions in the Spin World.

Repo structure

The sqlite-proxy/ directory contains a proxy to intercept executions against a sqlite database.

The example/ directory contains a Spin application which consists of one http handler which returns data from a sqlite database in the body. In the spin.toml file, the component build instructions point to a build.sh script which builds the example component and composes it with the sqlite-middleware component.

Demo instructions

Pre-requisites

• Install cargo component:

cargo install --git https://github.com/bytecodealliance/cargo-component cargo-component

• Install latest Spin

Build the components and run the demo

# Build the Spin application and sqlite-proxy. Spin build runs the `example/build.sh` script.
spin build

# Build and run the example
spin up --sqlite @db.sql

# Curl http://127.0.0.1:3000/login in a browser
curl -i http://localhost:3000

Try changing the Spin app to run without the sqlite-proxy, by changing the wasm file used in the spin.toml file:

1. Uncomment source = "target/wasm32-wasi/release/example.wasm"
2. Comment out #source = "service.wasm"

[component.example]
#source = "service.wasm"
source = "target/wasm32-wasi/release/example.wasm"

Now deploy your application.

$ spin deploy
Uploading example version 0.1.0 to Fermyon Cloud...
Deploying...
Waiting for application to become ready............. ready
Available Routes:
  example: https://example-12345.fermyon.app (wildcard)

In the example deploy output above, the app now exists at endpoint https://example-12345.fermyon.app.