PDF.co Web API – HTML To PDF API – JavaScript – Generate PDF From Large HTML File

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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 Input
const inputHtml = "./sample.html";
// Destination PDF file name
const DestinationFile = "./result.pdf";

// Prepare requests params as JSON
// See documentation: https://apidocs.pdf.co/?#1-json-pdfconvertfromhtml
var parameters = {};

// Input HTML code to be converted. Required.
parameters["html"] = fs.readFileSync(inputHtml, "utf8");

// Name of resulting file
parameters["name"] = path.basename(DestinationFile);

// Set to css style margins like 10 px or 5px 5px 5px 5px.
parameters["margins"] = "5px 5px 5px 5px";

// Can be Letter, A4, A5, A6 or custom size like 200x200
parameters["paperSize"] = "Letter";

// Set to Portrait or Landscape. Portrait by default.
parameters["orientation"] = "Portrait";

// true by default. Set to false to disbale printing of background.
parameters["printBackground"] = true;

// If large input document, process in async mode by passing true
parameters["async"] = true;

// Set to HTML for header to be applied on every page at the header.
parameters["header"] = "";

// Set to HTML for footer to be applied on every page at the bottom.
parameters["footer"] = "";


// Convert JSON object to string
var jsonPayload = JSON.stringify(parameters);

// Prepare request to `HTML To PDF` API endpoint
var url = '/v1/pdf/convert/from/html';
var reqOptions = {
    host: "api.pdf.co",
    path: url,
    method: "POST",
    headers: {
        "x-api-key": API_KEY,
        "Content-Type": "application/json",
        "Content-Length": Buffer.byteLength(jsonPayload, '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) {
            console.log(`Job #${data.jobId} has been created!`);
            checkIfJobIsCompleted(data.jobId, data.url);
        }
        else {
            // Service reported error
            console.log(data.message);
        }
    });
}).on("error", (e) => {
    // Request error
    console.log(e);
});

// Write request data
postRequest.write(jsonPayload);
postRequest.end();

function checkIfJobIsCompleted(jobId, resultFileUrl) {
    let queryPath = `/v1/job/check`;
    let reqOptions = {
        host: "api.pdf.co",
        path: encodeURI(queryPath),
        method: "GET",
        headers: { "x-api-key": API_KEY }
    };

    https.get(reqOptions, (response) => {
        response.on("data", (d) => {
            response.setEncoding("utf8");

            // Parse JSON response
            let data = JSON.parse(d);
            console.log(`Checking Job #${jobId}, Status: ${data.status}, Time: ${new Date().toLocaleString()}`);

            if (data.status == "working") {
                // Check again after 3 seconds
                setTimeout(function () { checkIfJobIsCompleted(jobId, resultFileUrl); }, 3000);
            }
            else if (data.status == "success") {
                // Download PDF file
                var file = fs.createWriteStream(DestinationFile);
                https.get(resultFileUrl, (response2) => {
                    response2.pipe(file)
                        .on("close", () => {
                            console.log(`Generated PDF file saved as "${DestinationFile}" file.`);
                        });
                });
            }
            else {
                console.log(`Operation ended with status: "${data.status}".`);
            }
        })
    });
}
    

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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