protobuf2swagger
Work in progress project for saving some life, update not garrenteed. Welcome for pull request :).
Main purpose is to convert protobuf v2 file to openapi v3 JSON schema with NodeJS, and merge with some custom open api configurations.
Then you may render it easily with SwaggerUI.
What is supported
- customSchema in OAS v2 or v3 formats
- convert service to paths
- convert enum, enum to schemas in components/definitions, paths will reference to them
- basic types mapping to JS type number, string, boolean ( long types will be mapped to string)
- nested, repeated types
Install
npm i -g protobuf2swagger
Cli Usage
protobuf2swagger [config_file]
| Argument | Description |
|---|---|
| config_file | Customize configuration file. Default to protobuf2swagger.config.js under current folder. |
For options may check protobuf2swagger --help. (Nothing there yet, seriously.)
Config File
Example:
module.exports = {
// ERQU
files: ['test1.proto', 'test2.proto'],
// Optional
dist: 'apischema.json',
// Optional
formatServicePath: (path) => path.replace(/\./g, '/'),
// Optional, will convert long to string by default
long: 'number',
// Optional
// This will merge and overwrite the result parsed from protobuffer file.
// `paths` will merge by path
// `components` will merge by component except shcemas
customSchema: {
swagger: '2.0',
paths: {
'/api/test': {
get: {
responses: {
200: {
schema: {
$ref: 'GetDataResponse', // Tell me the protobuf message name
},
},
},
params: [],
},
},
},
components: {
securitySchemes: {
cookieAuth: {
type: 'apiKey',
in: 'cookie',
name: 'token',
},
},
},
security: [
{
cookieAuth: [],
},
],
},
// Optional, you may use this hook to overwrite the original transform result.
transform(type, result, args) {
switch (type) {
case 'field': {
const [field, options] = args;
console.log('message field:', field);
console.log('options:', options);
break;
}
case 'message': {
const [message, options] = args;
console.log('message:', messsage);
console.log('options:', options);
break;
}
case 'enum': {
const [enum] = args;
console.log('enum:', enum);
break;
}
case 'service': {
const [service, root, options] = args;
console.log('service:', service);
console.log('proto root:', root);
console.log('options:', options);
}
}
return result;
},
};Display with SwaggerUI
index.html (modified from swagger-ui-dist)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>API Document</title>
<link
rel="stylesheet"
type="text/css"
href="https://cdnjs.cloudflare.com/ajax/libs/swagger-ui/3.22.2/swagger-ui.css"
/>
<style>
html {
box-sizing: border-box;
overflow: -moz-scrollbars-vertical;
overflow-y: scroll;
}
*,
*:before,
*:after {
box-sizing: inherit;
}
body {
margin: 0;
background: #fafafa;
}
</style>
</head>
<body>
<div id="swagger-ui"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/swagger-ui/3.22.2/swagger-ui-bundle.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/swagger-ui/3.22.2/swagger-ui-standalone-preset.js"></script>
<script>
window.onload = function () {
// Begin Swagger UI call region
const ui = SwaggerUIBundle({
url: './apischema.json', // Path to the generated schema JSON file
dom_id: '#swagger-ui',
deepLinking: true,
presets: [SwaggerUIBundle.presets.apis, SwaggerUIStandalonePreset],
plugins: [SwaggerUIBundle.plugins.DownloadUrl],
layout: 'StandaloneLayout',
});
// End Swagger UI call region
window.ui = ui;
};
</script>
</body>
</html>Serve with simple express server:
const express = require('express');
const app = express();
app.use(express.static(__dirname /* path to index.html */));
app.listen(3000);
console.info('Served at port 3000');