harbor rest api 转graphql api

原理

实际上就是使用graphql 中的binding，首先基于swagger api 进行schema 生成，后边就是
使用binding 进行graphql 请求api 转换为rest api 请求，目前测试过两个开源的方案：
prisma 的graphql-openapi-binding 以及swagger-graphql 类库

步骤

• swagger 模型生成graphql schema

使用cli 工具 swagger-to-graphql

npm install -g swagger-to-graphql 
harbor swagger 文件
https://raw.githubusercontent.com/goharbor/harbor/master/docs/swagger.yaml
可以使用swagger editor 转换为json格式，同时我们暂时需要先删除带有文件操作的api
swagger-to-graphql --swagger=/path/to/swaggerjson > ./swagger.graphql

• swagger-to-graphql 使用

  比较简单，基于swagger 2 graphql npm 包

package.json:
{
"name": "swagger-graphql",
"version": "1.0.0",
"main": "index.js",
"license": "MIT",
"dependencies": {
"babel-polyfill": "^6.26.0",
"express": "^4.16.3",
"express-graphql": "^0.6.12",
"graphql": "^0.13.2",
"swagger-to-graphql": "^1.4.0"
},
"scripts": {
"start": "node app"
}
}

app.js:
require('babel-polyfill');
const express = require('express');
const app = express();
const graphqlHTTP = require('express-graphql');
const graphQLSchema = require('swagger-to-graphql');

const proxyUrl = 'https://harborserver/api';
const pathToSwaggerSchema = `${__dirname}/api/swagger.json`;
const customHeaders = {
Authorization: 'Basic YWRkOmJhc2ljQXV0aA=='
};

graphQLSchema(pathToSwaggerSchema, proxyUrl, customHeaders).then(schema => {
app.use('/graphql', graphqlHTTP(() => {
return {
schema,
graphiql: true
};
}));

app.listen(3009, '0.0.0.0', () => {
console.info('http://localhost:3009/graphql');
});
}).catch(e => {
console.log(e);
});

• graphql-binding-openapi

  类似,只是步骤多了几步

app.js

const { OpenApi } = require('graphql-binding-openapi')
const { GraphQLServer } = require('graphql-yoga')
const {importSchema} = require("graphql-import")

const typeDefs = importSchema("./schema.graphql")
const resolvers = {
Query: {
get_search: async (parent, args, context, info) => {
return context.harbor.query.get_search({ status: "available" }, context, info)
}
}
}

const server = new GraphQLServer({
resolvers,
typeDefs,
context: async req => ({
...req,
harbor: await OpenApi.init('./harbor.json', 'https://harborapiserver')
})
});

server.start(() => console.log('Server running on http://localhost:4000'))

package.json:

{
"name": "open-api",
"version": "1.0.0",
"main": "index.js",
"license": "MIT",
"dependencies": {
"graphql-binding-openapi": "^1.0.5",
"graphql-import": "^0.6.0",
"graphql-yoga": "^1.16.0"
},
"scripts": {
"start":"node app"
}
}

几个问题

• file schema type

因为字段类型file 暂时转换不支持，但是可以手工调整
转换的时候会提示file 类型未定义，解决方法，暂时删除了关于文件的部分
实际上可以集成prisma 后者apollo 自带file type 的resolver

• 访问api 登录的问题

当前测试的开放的api，大部分api是需要进行认证的，可以还有待测试
实际上当前支持basic 认证可以使用 https://username:password@harborserver/api
或者使用 Authorization: "Basic 用户名和密码的base64加密字符串" 的请求

效果

测试

• query

query {
  get_repositories_top(count:3){
    name
    description
    pull_count
  } 
}

• 结果

{
  "data": {
    "get_repositories_top": [
      {
        "name": "library/kubedns-amd64",
        "description": null,
        "pull_count": null
      },
      {
        "name": "coredns/coredns",
        "description": null,
        "pull_count": null
      },
      {
        "name": "marketing/mk-platform-order-test",
        "description": null,
        "pull_count": null
      }
    ]
  }
}

• 界面
  

参考资料

https://github.com/graphql-binding/graphql-binding-openapi
https://github.com/yarax/swagger-to-graphql#readme
https://github.com/rongfengliang/swagger-to-graphql-docker/tree/harborgraphql