PDF.co Web API – HTML To PDF API – JavaScript – Generate PDF Invoice From HTML Template (Node.js) – Async API

PDF.co Web API – HTML To PDF API – JavaScript – Generate PDF Invoice From HTML Template (Node.js) – Async API

GeneratePdfInvoiceFromHtmlTemplate.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)}&async=True`;
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) {
            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(requestBody);
postRequest.end();


function checkIfJobIsCompleted(jobId, resultFileUrl) {
    let queryPath = `/v1/job/check?jobid=${jobId}`;
    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);
            if (data.Status == "InProgress") {
                // Check again after 2 seconds
				setTimeout(function(){ checkIfJobIsCompleted(jobId, resultFileUrl);}, 2000);
            }
            else if (data.Status == "Finished") {
                // 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}".`);
            }
        })
    });
}

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