├── LICENSE
├── README.md
├── index.html
├── index.js
└── styles.css
/LICENSE:
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1 | MIT License
2 |
3 | Copyright (c) 2018 Julio J.
4 |
5 | Permission is hereby granted, free of charge, to any person obtaining a copy
6 | of this software and associated documentation files (the "Software"), to deal
7 | in the Software without restriction, including without limitation the rights
8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 |
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 |
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 |
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/README.md:
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1 | # regex-web-scraping
2 | Web Scraping con Expresiones Regulares ... ¡nivel Ninja!
3 |
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/index.html:
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1 |
2 |
3 |
4 |
5 |
6 | Juegos PS4 con descuento
7 |
8 |
9 |
10 |
11 |
12 |
Juegos de PS4 con +40% descuento en ML
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14 |
15 |
16 |
17 |
18 |
19 |
Demostración de Web Scraping con Javascript y Expresiones Regulares.
20 |
by @jjyepez
21 |
22 |
23 |
24 |
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/index.js:
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1 | /*
2 | Demostración de Web Scraping con Javascript y Expresiones Regulares.
3 | Autor: Julio J. - @jjyepez
4 | Fecha: 24/06/2018
5 | */
6 |
7 | // --- si quieres probar con otros criterios de filtrado, remplaza la URL obtenida en ML en la sig linea --- jjy
8 | const urlML = "https://videojuegos.mercadolibre.com.co/juego-ps4_Envio_Gratis_DisplayType_LF_OrderId_PRICE*DESC_Discount_40-100"
9 |
10 | iniciar()
11 |
12 | function iniciar(){
13 | traerHTML( urlML )
14 | actualizarFecha()
15 | }
16 |
17 | function traerHTML( urlML ){
18 | // --- servicio propio para superar restricciones CORS ... by jjyepez
19 | const URL = "https://noesishosting.com/sw/cors/?a=cors&url=" + urlML
20 |
21 | // --- traer el HTML del sitio web
22 | fetch( URL )
23 | .then( rsp => rsp.text() )
24 | .then( rslt => {
25 | const jsonDatosExtraidos = procesarResultados( rslt )
26 | renderDatosExtraidos( jsonDatosExtraidos )
27 | })
28 | .catch( err => { console.log( err ) })
29 | }
30 |
31 | // --- procesar con RegExp
32 | function procesarResultados( html ){
33 | const jsonDatos = []
34 | var matches = null
35 |
36 | // --- RegExp by jjyepez
37 | const expresionRegular = new RegExp(
38 | "(.*?)(?:.*?)fraction\">(.*?)?(?:.*?)discount(?:.*?)>(.*?\%)"
39 | , "g" )
40 |
41 | do {
42 | // --- extrayendo datos
43 | matches = expresionRegular.exec( html )
44 | jsonDatos.push( matches )
45 |
46 | }
47 | while ( matches !== null )
48 | return jsonDatos
49 | }
50 |
51 | function renderDatosExtraidos( datos ){
52 | const $divResultados = document.getElementById('resultados')
53 | $divResultados.innerHTML = ''
54 | datos.forEach( reg => {
55 | if( reg ){
56 | const $card = document.createElement('div')
57 | $card.classList.add('card')
58 | $card.addEventListener('click', ()=>{
59 | window.open(reg[3])
60 | })
61 | $card.innerHTML = `
62 |
64 |