HTML to PDF Converter

jancurn/url-to-pdf

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Loads a web page in headless Chrome using Puppeteer and prints it to PDF. The input is a JSON object and output is a PDF file.

Dockerfile

# 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-puppeteer

# 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 --chown=node:node . ./

# 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" ]

package.json

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

main.js

const Apify = require('apify');

Apify.main(async () => {
    console.log('Fetching input...');
    const input = await Apify.getValue('INPUT');
    if (!input || typeof(input.url) !== 'string') {
        throw new Error('Input must be an object with the "url" property');
    }
    
    console.log('Launching headless Chrome...');
    const browser = await Apify.launchPuppeteer();
    const page = await browser.newPage();
    
    console.log(`Loading page (url: ${input.url})...`);
    await page.goto(input.url);
    
    if (input.sleepMillis > 0) {
        console.log(`Sleeping ${input.sleepMillis} millis...`);
        await new Promise((resolve) => setTimeout(resolve, input.sleepMillis));
    }
    
    const opts = input.pdfOptions || {};
    delete opts.path; // Don't store to file
    console.log(`Printing to PDF (options: ${JSON.stringify(opts)})...`);
    const pdfBuffer = await page.pdf(opts);
    
    console.log(`Saving PDF (size: ${pdfBuffer.length} bytes) to output...`);
    await Apify.setValue('OUTPUT', pdfBuffer, { contentType: 'application/pdf' });
    
    const storeId = process.env.APIFY_DEFAULT_KEY_VALUE_STORE_ID;
    
    // NOTE: Adding disableRedirect=1 param, because for some reason Chrome doesn't allow pasting URLs to PDF
    // that redirect into the browser address bar (yeah, wtf...)
    console.log('PDF file has been stored to:');
    console.log(`https://api.apify.com/v2/key-value-stores/${storeId}/records/OUTPUT?disableRedirect=1`);
});