Created
May 18, 2017 10:08
-
-
Save 7flash/2d72beb62ca650ccf9ed26cf64970ecd to your computer and use it in GitHub Desktop.
Request + cheerio + corotines
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
var request = require('request'); | |
var cheerio = require('cheerio'); | |
var co = require('co'); | |
function parse(url) { | |
// Make promise from calback | |
return new Promise((resolve, reject) => { | |
request({url}, function(error, response, body) { | |
if(error) return reject(error); | |
let $ = cheerio.load(body); | |
// Make cheerio iterable | |
$.fn[Symbol.iterator] = function* () { | |
let keys = Object.keys(this).filter((key) => Number.isInteger(+key)); | |
for (let key in keys) { | |
yield this[key]; | |
} | |
}; | |
resolve($); | |
}); | |
}); | |
} | |
// Example | |
co(function* () { | |
let page = yield parse('http://www.bing.com/search?q=generator'); | |
for(let link of page('#b_results > .b_algo > h2 > a')) console.log(page(link).attr('href')); | |
}); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment