protagonist

Protagonist

API Blueprint Parser for Node.js

Protagonist is a Node.js wrapper for the Snow Crash library.

API Blueprint is Web API documentation language. You can find API Blueprint documentation on the API Blueprint site.

Install

The best way to install Protagonist is by using its NPM package.

$ npm install protagonist

Works smoothly with node.js ~0.8.15, 0.10.x, 0.12.x and iojs v1.x.x

Getting started

var protagonist = require('protagonist');

protagonist.parse('# My API', function(error, result) {
    if (error) {
        console.log(error);
        return;
    }

    console.log(result.ast);
});

Synchronous usage

If you for some reason need to use the api synchronous, that is also possible. Please note that the recommended way is to use the asynchronous api as to not block the event loop.

var result = protagonist.parseSync('# My API');

Parsing Result

Parsing this blueprint:

# GET /1
+ response

will produce the following object (result variable):

{
  "ast": {
    "_version": "3.0",
    "metadata": [],
    "name": "",
    "description": "",
    "resourceGroups": [
      {
        "name": "",
        "description": "",
        "resources": [
          {
            "name": "",
            "description": "",
            "uriTemplate": "/1",
            "model": {},
            "parameters": [],
            "actions": [
              {
                "name": "",
                "description": "",
                "method": "GET",
                "parameters": [],
                "examples": [
                  {
                    "name": "",
                    "description": "",
                    "requests": [],
                    "responses": [
                      {
                        "name": "200",
                        "description": "",
                        "headers": [],
                        "body": "",
                        "schema": ""
                      }
                    ]
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "warnings": [
    {
      "code": 6,
      "message": "missing response HTTP status code, assuming 'Response 200'",
      "location": [
        {
          "index": 12,
          "length": 9
        }
      ]
    }
  ]
}

Keys Description

• ast ... This is the abstract syntax tree (AST) of the parsed blueprint.

  The structure under this key is 1:1 with the AST Blueprint serialization JSON media type v3.0 – vnd.apiblueprint.ast.raw+json; version=3.0.

• warnings ... Array of the parser warnings as occurred during the parsing

  • code ... Warning group code
  • message ... Warning message
  • location ... Array of (possibly non-continuous) locations in the source blueprint
    • index ... Zero-based index of the character where the warning occurs
    • length ... Number of the characters from index where the warning occurs

Hacking Protagonist

You are welcome to contribute. Use following steps to build & test Protagonist.

Build

Protagonist uses node-gyp build tool.

1. If needed, install node-gyp:

   $ npm install -g node-gyp
   

2. Clone the repo + fetch the submodules:

   $ git clone git://github.com/apiaryio/protagonist.git
   $ cd protagonist
   $ git submodule update --init --recursive
   $ npm install
   

3. Build:

   $ node-gyp configure
   $ node-gyp build
   

Test

Inside the protagonist repository run:

$ npm test

Contribute

Fork & Pull Request.

License

MIT License. See the LICENSE file.