Generate PDF Invoice From HTML Template (Node.js) - Async API - JavaScript
PDF from HTML Template sample in JavaScript demonstrating ‘Generate PDF Invoice From HTML Template (Node.js) - Async API’
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
const API_KEY = "***********************************";
// Data to fill the template
const templateData = "./invoice_data.json";
// Destination PDF file name
const DestinationFile = "./result.pdf";
/*
Please follow below steps to create your own HTML Template and get "templateId".
1. Add new html template in app.pdf.co/templates/html
2. Copy paste your html template code into this new template. Sample HTML templates can be found at "https://github.com/bytescout/pdf-co-api-samples/tree/master/PDF%20from%20HTML%20template/TEMPLATES-SAMPLES"
3. Save this new template
4. Copy it’s ID to clipboard
5. Now set ID of the template into “templateId” parameter
*/
// HTML template using built-in template
// see https://app.pdf.co/templates/html/2/edit
const template_id = 2;
// Prepare request to `HTML To PDF` API endpoint
var queryPath = `/v1/pdf/convert/from/html?name=${path.basename(DestinationFile)}&async=True`;
var reqOptions = {
host: "api.pdf.co",
path: encodeURI(queryPath),
method: "POST",
headers: {
"x-api-key": API_KEY,
"Content-Type": "application/json"
}
};
var requestBody = JSON.stringify({
"templateId": template_id,
"templateData": fs.readFileSync(templateData, "utf8"),
"async": true
});
// Send request
var postRequest = https.request(reqOptions, (response) => {
response.on("data", (d) => {
// Parse JSON response
var data = JSON.parse(d);
if (data.error == false) {
console.log(`Job #${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(requestBody);
postRequest.end();
function checkIfJobIsCompleted(jobId, resultFileUrl) {
let queryPath = `/v1/job/check`;
// JSON payload for api request
let jsonPayload = JSON.stringify({
jobid: jobId
});
let reqOptions = {
host: "api.pdf.co",
path: queryPath,
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) => {
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}".`);
}
})
});
// Write request data
postRequest.write(jsonPayload);
postRequest.end();
}
invoice_data.json
{
"invoice_id": "1234567",
"invoice_date": "April 30, 2016",
"invoice_dateDue": "May 15, 2016",
"paid": false,
"issuer_name": "Acme Inc",
"issuer_company": "Acme International",
"issuer_address": "City, Street 3rd",
"issuer_email": "support@example.com",
"issuer_website": "http://example.com",
"client_name": "Food Delivery Inc.",
"client_company": "Food Delivery International",
"client_address": "New York, Some Street, 42",
"client_email": "client@example.com",
"items": [
{
"name": "Setting up new web-site",
"price": 250
},
{
"name": "Website Content Addition",
"price": 700
},
{
"name": "Database Setup",
"price": 200
},
{
"name": "Record Digitalization",
"price": 1800
},
{
"name": "Cloud Storage",
"price": 500
},
{
"name": "Short Messages",
"price": 35
},
{
"name": "Search Engine Optimization",
"price": 200
},
{
"name": "Priority Support",
"price": 75
},
{
"name": "Configuring mail server and mailboxes",
"price": 50
}
],
"tax": 0.065,
"discount": 0.01,
"note": "Thank You For Your Business!"
}
PDF.co Web API: the Web API with a set of tools for documents manipulation, data conversion, data extraction, splitting and merging of documents. Includes image recognition, built-in OCR, barcode generation and barcode decoders to decode bar codes from scans, pictures and pdf.
Download Source Code (.zip)
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