How to generate PDF invoice from HTML template (node for HTML to PDF API in JavaScript and PDF.co Web API

PDF.co Web API is the Rest API that provides set of data extraction functions, tools for documents manipulation, splitting and merging of pdf files. Includes built-in OCR, images recognition, can generate and read barcodes from images, scans and pdf.

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app.js

      
var https = require("https");
var path = require("path");
var fs = require("fs");


// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co/documentation/api
const API_KEY = "***********************************";


// HTML template
const template = "./invoice_template.html";
// Data to fill the template
const templateData = "./invoice_data.json";
// Destination PDF file name
const DestinationFile = "./result.pdf";


// Prepare request to `HTML To PDF` API endpoint
var queryPath = `/v1/pdf/convert/from/html?name=${path.basename(DestinationFile)}`;
var reqOptions = {
    host: "api.pdf.co",
    path: encodeURI(queryPath),
    method: "POST",
    headers: {
        "x-api-key": API_KEY,
        "Content-Type": "application/json"
    }
};
var requestBody = JSON.stringify({
    "html": fs.readFileSync(template, "utf8"),
    "templateData": fs.readFileSync(templateData, "utf8")
});
// Send request
var postRequest = https.request(reqOptions, (response) => {
    response.on("data", (d) => {
        // Parse JSON response
        var data = JSON.parse(d);        
        if (data.error == false) {
            // Download PDF file
            var file = fs.createWriteStream(DestinationFile);
            https.get(data.url, (response2) => {
                response2.pipe(file)
                .on("close", () => {
                    console.log(`Generated PDF file saved as "${DestinationFile}" file.`);
                });
            });
        }
        else {
            // Service reported error
            console.log(data.message);
        }
    });
}).on("error", (e) => {
    // Request error
    console.log(e);
});
// Write request data
postRequest.write(requestBody);
postRequest.end();

invoice_data.json

      
{
    "number": "1234567",
    "date": "April 30, 2016",
    "from": "Acme Inc., City, Street 3rd , +1 888 123-456, support@example.com",
    "to": "Food Delivery Inc., New York, Some Street, 42",
    "lines": [{
        "title": "Setting up new web-site",
        "quantity": 3,
        "price": 50
    }, {
        "title": "Configuring mail server and mailboxes",
        "quantity": 5,
        "price": 50
    }]
}

package.json

      
{
  "name": "test",
  "version": "1.0.0",
  "description": "PDF.co",
  "main": "app.js",
  "scripts": {
  },
  "keywords": [
    "pdf.co",
    "web",
    "api",
    "bytescout",
    "api"
  ],
  "author": "ByteScout & PDF.co",
  "license": "ISC",
  "dependencies": {
    "request": "^2.88.2"
  }
}

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