Metadata Extractor

# This is a template for a Dockerfile used to run acts in Actor system.
# The base image name below is set during the act build, based on user settings.
# IMPORTANT: The base image must set a correct working directory, such as /usr/src/app or /home/user
FROM apify/actor-node-basic:v0.21.10

# Second, copy just package.json and package-lock.json since it should be
# the only file that affects "npm install" in the next step, to speed up the build
COPY package*.json ./

# Install NPM packages, skip optional and development dependencies to
# keep the image small. Avoid logging too much and print the dependency
# tree for debugging
RUN npm --quiet set progress=false \
 && npm install --only=prod --no-optional \
 && echo "Installed NPM packages:" \
 && (npm list --all || true) \
 && echo "Node.js version:" \
 && node --version \
 && echo "NPM version:" \
 && npm --version

# Copy source code to container
# Do this in the last step, to have fast build if only the source code changed
COPY  . ./

# NOTE: The CMD is already defined by the base image.
# Uncomment this for local node inspector debugging:
# CMD [ "node", "--inspect=0.0.0.0:9229", "main.js" ]

{
    "name": "apify-project",
    "version": "0.0.1",
    "description": "",
    "author": "It's not you it's me",
    "license": "ISC",
    "dependencies": {
        "apify": "0.21.10",
        "request-promise": "latest",
        "cheerio": "latest"
    },
    "scripts": {
        "start": "node main.js"
    }
}

1const Apify = require('apify');
2const request = require('request-promise');
3const cheerio = require('cheerio');
4
5
6Apify.main(async () => {
7    // Get input of the act
8    const input = await Apify.getValue('INPUT');
9    if (!input || typeof(input.url) !== 'string') {
10        throw new Error("Invalid input, it needs to contain 'url' field.");
11    }
12    
13    // Load the web page and extract meta-data
14    console.log(`Opening ${input.url}`);
15    const html = await request(input.url);
16    
17    const $ = cheerio.load(html);
18    
19    const meta = {};
20    $('head meta').each(function () {
21        const name = $(this).attr('name');
22        const content = $(this).attr('content');
23        if (name) meta[name] = content ? content.trim() : null;
24    });
25    
26    const result = {
27        url: input.url,
28        title: ($('head title').text() || '').trim(),
29        meta,
30    }
31
32    // Show and save result
33    console.log('Result:');
34    console.dir(result);
35    await Apify.setValue('OUTPUT', result);
36});