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File size: 4,865 Bytes
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const express = require("express")
const app = express();
const puppeteer = require("puppeteer");
const bodyParser = require("body-parser");
const mutler = require("multer");
// parse application/json
app.use(bodyParser.json());
// parse application/x-www-form-urlencoded
app.use(bodyParser.urlencoded({ extended: false }));
// app.use(express.urlencoded());
app.use(mutler().array(""));
const initBrowser = puppeteer.launch({
executablePath: process.env.CHROME_BIN || null,
defaultViewport: null,
headless: true,
});
async function addRequestFilter(page) {
const resourcetypes = ['document'];
await page.setRequestInterception(true);
// page.
page.on("request", (request) => {
// return request.continue();
if (resourcetypes.includes(request.resourceType())) {
request.continue();
}
else {
request.abort();
}
});
return page;
}
const getData = async (url) => {
// Open a new page
const browser = await initBrowser;
var page = await browser.newPage();
page = await addRequestFilter(page);
await page.goto(url, {
// waitUntil: "domcontentloaded",
});
// trigger
const title = await page.evaluate(() => {
const elem = document.querySelector("span.B_NuCI");
if (elem)
return elem.textContent;
});
const price = await page.evaluate(() => {
const elem = document.querySelector("div._30jeq3._16Jk6d");
if (elem)
return elem.textContent;
});
const image = await page.evaluate(() => {
const elem = document.querySelector("div.CXW8mj._3nMexc>img");
if (elem)
return elem.src;
});
page.close();
return {
title: title,
price: price,
image: image,
};
};
const getHTML = async (url, headers = null) => {
const browser = await initBrowser;
var page = await browser.newPage();
page = await addRequestFilter(page);
if (headers) {
// console.log("headers",headers);
await page.setExtraHTTPHeaders(headers);
}
await page.goto(url, {
// waitUntil: "domcontentloaded",
});
return await page.content();
}
const getScreenshot = async (url, headers = null) => {
const browser = await initBrowser;
var page = await browser.newPage();
page = await addRequestFilter(page);
if (headers) {
// console.log("headers",headers);
await page.setExtraHTTPHeaders(headers);
}
await page.goto(url, {
waitUntil: "domcontentloaded",
});
const image = await page.screenshot({
type: "png",
});
const html = await page.content();
page.close();
return { image, html };
}
app.get("/", async (req, res) => {
res.send('go to /test');
})
url = "https://www.flipkart.com/apple-iphone-15-blue-128-gb/p/itmbf14ef54f645d";
app.get("/test", async (req, res) => {
const data = await getData(url);
res.type("json");
res.send(JSON.stringify(data));
})
app.get("/testhtml", async (req, res) => {
const html = await getHTML(url);
res.type("json");
res.send(JSON.stringify({
html: html
}));
})
app.get("/testscreenshot", async (req, res) => {
const {html,image} = await getScreenshot(url);
// convert buffer to base64 string
const base64Image = await image.toString('base64');
res.type("json");
return res.send(JSON.stringify({
// "html":html,
"screenshot": base64Image
}));
})
app.post("/html", async (req, res) => {
const data = req.body;
if (!("url" in data)) {
res.type("json");
return res.send(JSON.stringify({
"error": "no url parameter in request",
}));
}
const { url, headers } = data;
try {
const html = await getHTML(url, headers);
res.type("json").send(JSON.stringify({
html: html
}));
}
catch (e) {
return res.type("json").send(JSON.stringify({
"error": "can't open page",
}));
}
})
app.post("/screenshot", async (req, res) => {
const data = req.body;
if (!("url" in data)) {
return res.type("json").send(JSON.stringify({
"error": "no url parameter in request",
}));
}
const url = data['url'];
try {
const { image, html } = await getScreenshot(url);
// convert buffer to base64 string
const base64Image = await image.toString('base64');
return res.type("json").send(JSON.stringify({
"base64": base64Image,
"html":html,
}));
}
catch (e) {
return res.type("json").send(JSON.stringify({
"error": "can't open page",
}));
}
})
app.listen(8080, () => console.log("Server running at port 8080")); |