kill-circular

这个包在官方的基础上解除了循环引用。

why?

swagger-parser 官方使用的是 json-schema-parser 来解析的协议。在 json-schema-parser 的 lib/dereference.js 中有如下内容

line 58

if ($Ref.isAllowed$Ref(value, options)) {
  dereferenced = dereference$Ref(value, keyPath, keyPathFromRoot, parents, $refs, options);
  circular = dereferenced.circular;
  obj[key] = dereferenced.value;
}

修改后

if ($Ref.isAllowed$Ref(value, options)) {
  dereferenced = dereference$Ref(value, keyPath, keyPathFromRoot, parents, $refs, options);
  circular = dereferenced.circular;
  obj[key] = circular ? _.cloneDeep(dereferenced.value) : dereferenced.value;
}

注意观察最后一行，官方的写法是如果是循环引用，是自己引用自己，obj[key] === dereferenced.value.items 恒成立。

我的修改，是拷贝了一份副本，避免了重复引用。这个是为了方便后续的 mock 和 api 在 html 中的渲染，大家酌情使用

#############

以下是官方说明

##############

Swagger 2.0 and OpenAPI 3.0 parser/validator

Features

• Parses Swagger specs in JSON or YAML format
• Validates against the Swagger 2.0 schema or OpenAPI 3.0 Schema
• Resolves all $ref pointers, including external files and URLs
• Can bundle all your Swagger files into a single file that only has internal $ref pointers
• Can dereference all $ref pointers, giving you a normal JavaScript object that's easy to work with
• Tested in Node.js and all modern web browsers on Mac, Windows, and Linux
• Tested on over 1,000 real-world APIs from Google, Instagram, Spotify, etc.
• Supports circular references, nested references, back-references, and cross-references
• Maintains object reference equality — $ref pointers to the same value always resolve to the same object instance

Related Projects

• Swagger CLI
• Swagger Express Middleware

Example

SwaggerParser.validate(myAPI, function(err, api) {
  if (err) {
    console.error(err);
  }
  else {
    console.log("API name: %s, Version: %s", api.info.title, api.info.version);
  }
});

Or use Promises syntax instead. The following example is the same as above:

SwaggerParser.validate(myAPI)
  .then(function(api) {
    console.log("API name: %s, Version: %s", api.info.title, api.info.version);
  })
  .catch(function(err) {
    console.error(err);
  });

For more detailed examples, please see the API Documentation

Installation

Node

Install using npm:

npm install swagger-parser

Then require it in your code:

var SwaggerParser = require('swagger-parser');

Web Browsers

Reference swagger-parser.js or swagger-parser.min.js in your HTML:

<script src="https://cdn.rawgit.com/JS-DevTools/swagger-parser/dist/swagger-parser.js"></script>
<script>
  SwaggerParser.validate(myAPI, function(err, api) {
    if (err) {
      console.error(err);
    }
    else {
      console.log("API name: %s, Version: %s", api.info.title, api.info.version);
    }
  });
</script>

API Documentation

Full API documentation is available right here

Contributing

I welcome any contributions, enhancements, and bug-fixes. File an issue on GitHub and submit a pull request.

Building/Testing

To build/test the project locally on your computer:

1. Clone this repo
   git clone https://github.com/APIDevTools/swagger-parser.git

2. Install dependencies
   npm install

3. Run the build script
   npm run build

4. Run the tests
   npm test

5. Start the local web server
   npm start (then browse to http://localhost:8080/test/)

License

Swagger Parser is 100% free and open-source, under the MIT license. Use it however you want.

Big Thanks To

Thanks to these awesome companies for their support of Open Source developers ❤