Created
November 2, 2018 06:26
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Scraping data from IMDB and saving it in a JSON
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const puppeteer = require('puppeteer'); | |
const fs = require('fs'); | |
const moment = require('moment'); | |
let urlPre = 'http://www.imdb.com/title/'; | |
let urlPost = '/ratings'; | |
const titles = []; | |
process.argv.forEach((val, index) => { | |
index!==0 && index !== 1 ? titles.push(val): null; | |
}); | |
const getCurrentUrl = (pageNum) => { | |
return urlPre + pageNum + urlPost; | |
}; | |
const getWritingMoment = ()=>{ | |
let c = moment().format("MMM D H-mm"); | |
return c.toString(); | |
} | |
let getAllData = async () => { | |
const titleData = []; | |
const browser = await puppeteer.launch({ | |
headless: true, | |
timeout: 40000 | |
}); | |
const page = await browser.newPage(); | |
const getRatings = async (cTitle) => { | |
await page.goto(getCurrentUrl(cTitle)); | |
return await page.evaluate(() => { | |
const rTableData = {}; | |
const ratingNum = {}; | |
let tVotes =0; | |
const objTitleName = document.querySelector('#main > section > div > div.subpage_title_block > div.parent > h3').innerText; | |
const objRAvg = parseFloat(document.querySelector('#main > section > div > div.subpage_title_block > div.ipl-ratings-bar > div > span').innerText); | |
for(let j = 2; j< 5; j++){ | |
let rDemographic = {}; | |
for (let i = 2; i< 7; i++){ | |
let objRall = document.querySelector('#main > section > div > table:nth-child(14) > tbody > tr:nth-child('+j+') > td:nth-child('+i+')').innerText.split('\n').slice(0, 2).map((v)=>{ | |
return parseFloat(v.replace(',', '')); | |
});; | |
switch (i) { | |
case 2: | |
rDemographic.all = objRall; | |
break; | |
case 3: | |
rDemographic.kids = objRall; | |
break; | |
case 4: | |
rDemographic.youth = objRall; | |
break; | |
case 5: | |
rDemographic.middle = objRall; | |
break; | |
case 6: | |
rDemographic.old = objRall; | |
break; | |
} | |
} | |
switch (j) { | |
case 2: | |
rTableData.rAll = rDemographic; | |
break; | |
case 3: | |
rTableData.rMale= rDemographic; | |
break; | |
case 4: | |
rTableData.rFemale= rDemographic; | |
} | |
} | |
for (let i = 2; i< 12; i++){ | |
const objRNumValue = parseFloat(document.querySelector('#main > section > div > table:nth-child(7) > tbody > tr:nth-child('+i+') > td:nth-child(3)').innerText.replace(',', '')); | |
ratingNum[(12-i).toString()] = objRNumValue; | |
tVotes = tVotes + objRNumValue; | |
}; | |
for( let i = 3; i< 5; i++){ | |
const obj = document.querySelector('#main > section > div > table:nth-child(16) > tbody > tr:nth-child(2) > td:nth-child('+i+')').innerText.split('\n').slice(0, 2).map((v)=>{ | |
return parseFloat(v.replace(',', '')); | |
}); | |
i ===3 ? rTableData.rUS = obj: rTableData.rNonUs = obj; | |
} | |
rTableData.title = objTitleName; | |
rTableData.rNum = ratingNum; | |
rTableData.totalVotes = tVotes; | |
rTableData.rAvg = objRAvg; | |
return rTableData; | |
}); | |
}; | |
for (let cTitle of titles) { | |
let result = await getRatings(cTitle); | |
result.id = cTitle; | |
result.timeStamp = getWritingMoment(); | |
titleData.push(result); | |
} | |
browser.close(); | |
return titleData; // Return the data | |
}; | |
getAllData().then((value) => { | |
// console.log(value); // Success! | |
for( let i = 0; i< value.length; i++){ | |
try { | |
const myFile = './imdbData/'+value[i].title+getWritingMoment()+'.json'; | |
console.log('my file is ', myFile); | |
fs.writeFile(myFile, JSON.stringify(value[i], null, 2), (e) => { | |
if (e) throw e; | |
console.log('The file has been saved!'); | |
}) | |
} catch(e){ | |
console.log('erroor is ', e) | |
} | |
} | |
}); |
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