Netlify Functions

hoge.js

exports.handler = (event, _context, callback) => {

  if ('url' in event.queryStringParameters === false) {
    console.error("parameter 'url' is necessary!!");
    return;
  }

  const url = event.queryStringParameters.url;
  const options = {
    'url': encodeURI(url),
    'timeout': 10000,
    'headers': {
      'user-agent': 'My-Functions',
    },
  }
  const ogs = require("open-graph-scraper");
  ogs(options).then(function(data) {
    const metadata = data.result;

    let ogpData = {};
    ogpData['siteName'] = metadata.ogSiteName;
    ogpData['title'] = metadata.ogTitle;
    ogpData['description'] = metadata.ogDescription;

    if (Array.isArray(metadata.ogImage)) {
      const jpgUrl = metadata.ogImage.find((image) => image.url.endsWith('.jpg') || image.url.endsWith('.jpeg')).url
      ogpData['image'] = jpgUrl
    } else if (typeof metadata.ogImage !== 'undefined'){
      ogpData['image'] = metadata.ogImage.url;
    }
    console.log(ogpData);
    console.log(JSON.stringify(ogpData));
    callback(null, {
      statusCode: 200,
      "headers": { "Content-Type": "application/json; charset=utf-8"},
      body: JSON.stringify(ogpData)
    });
  }).catch(function(error) {
      console.error(error);
      let ogpData = {};
      ogpData['status'] = "404";
      return;
  });

};