SCC 212 - Advanced Programming

Requirements

• Java
• JavaScript
• Chromium Compatible

0. Demo

Two websites with different styles:

• http://covid19.wuhanstudio.team
• Johns Hopkins

1. Database (SQL)

Query from your own database

• MySQL
• MongoDB (nonSQL)

Reference:

• http://3g.dxy.cn/newh5/view/pneumonia
• https://github.com/CSSEGISandData/COVID-19

2. API Server (Java)

Recommended framework and package manager:

• Spring Boot
• Maven

Reference

• https://spring.io/quickstart
• https://github.com/BlankerL/DXY-COVID-19-Crawler

3. Online Monitor (JavaScript)

You may choose your favorite, but the final demo should be compatible with Chrome，Firefox

• NodeJS
• React / Vue / Angular
• Chromium Compatible

Reference

• https://github.com/shfshanyue/2019-ncov
• https://cli.vuejs.org/
• https://cli.vuejs.org/guide/deployment.html

4. Docker

It’s much better if you can publish your work as a docker image。

• Dockerfile
• docker-compose.yml

Reference:

• https://kubeless.io/docs/quick-start/

Serverless (function)

FaaS (Function as a Service) is taking on the trend recently. If you are interested, you may try AWS Lambda or knative.

• AWS Lambda

Here’s an example serverless function deployed on Tecent Cloud with Nodejs8.9 triggered by API Gateway：

const request = require('request')

async function getDxyData() {
  try {
    const body = await new Promise(
      (resolve, reject) => {
        request({
          method: 'GET',
          uri: 'https://ncov.dxy.cn/ncovh5/view/pneumonia'
        }, (error, response, body) => {
          if (error) return reject(error)
          resolve(body)
        })
      }
    )
    
    const statistics = JSON.parse(/getStatisticsService\s*=\s*(.*?)}catch/.exec(body)[1])

    const timeline = JSON.parse(/getTimelineService\S*\s*=\s*(.*?)}catch/.exec(body)[1])

    const areaStatistics = JSON.parse(/getAreaStat\s*=\s*(.*?)}catch/.exec(body)[1])
    let listByArea = areaStatistics.map((x) => {
      return {
        provinceName: x.provinceName,
        provinceShortName: x.provinceShortName,
        tags: x.tags,
        confirmed: x.confirmedCount,
        suspected: x.suspectedCount,
        cured: x.curedCount,
        dead: x.deadCount,
        comment: x.comment,
        cities: x.cities.map((x) => {
          return {
            cityName: x.cityName,
            confirmed: x.confirmedCount,
            suspected: x.suspectedCount,
            cured: x.curedCount,
            dead: x.deadCount
          }
        })
      }
    })

    let listByOther = JSON.parse(/getListByCountryTypeService\S*\s=\s*(.*?)}catch/.exec(body)[1])
    listByOther = listByOther.map((x) => {
      return {
        provinceId: x.provinceId,
        provinceName: x.provinceName,
        provinceShortName: x.provinceShortName,
        tags: x.tags,
        confirmed: x.confirmedCount,
        suspected: x.suspectedCount,
        cured: x.curedCount,
        dead: x.deadCount,
        comment: x.comment,
        createTime: x.createTime,
        modifyTime: x.modifyTime,
      }
    })

    return {
      readme: {
        source: 'https://ncov.dxy.cn/ncovh5/view/pneumonia',
        statistics: 'Summary',
        listByArea: 'Domestic',
        listByOther: 'Overseas',
        timeline: 'News'
      },
      statistics,
      listByArea,
      listByOther,
      timeline
    }
  } catch (err) {
    console.log(err)
    return null
  }
}

exports.main_handler = async (event, context, callback) => {
  const data = await getDxyData()
  if (!data) return { error: 1, message: 'Load Failed' }
  return { error: 0, message: '', data }
}

API Address：

https://service-j6saayzy-1252843818.gz.apigw.tencentcs.com/release/covid19

Reference

• https://kubeless.io/docs/quick-start/

Version Control (Git)

Use git to manage your project.

• Github / Gitee / Gitea