barcode generator API in JavaScript with PDF.co Web API

PDF.co Web API: the flexible Web API that includes full set of functions from e-signature requests to data extraction, OCR, images recognition, pdf splitting and pdf splitting. Can also generate barcodes 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 = "***********************************"; // Result image file name const DestinationFile = "./barcode.png"; // Barcode type. See valid barcode types in the documentation https://apidocs.pdf.co/#barcode-generator const BarcodeType = "QRCode"; // Barcode value const BarcodeValue = "QR123456\nhttps://pdf.co\nhttps://bytescout.com"; /* Valid error correction levels: ---------------------------------- Low - [default] Lowest error correction level. (Approx. 7% of codewords can be restored). Medium - Medium error correction level. (Approx. 15% of codewords can be restored). Quarter - Quarter error correction level (Approx. 25% of codewords can be restored). High - Highest error correction level (Approx. 30% of codewords can be restored). */ // Set "Custom Profiles" parameter var Profiles = '{ "profiles": [{ "profile1": { "Options.QRErrorCorrectionLevel": "Quarter" } }] }'; // Prepare request to `Barcode Generator` API endpoint var queryPath = `/v1/barcode/generate`; // JSON payload for api request var jsonPayload = JSON.stringify({ name: path.basename(DestinationFile), type: BarcodeType, value: BarcodeValue, profiles: Profiles, async: true }); var reqOptions = { host: "api.pdf.co", method: "POST", path: queryPath, 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 #${data.jobId} has been created!`); checkIfJobIsCompleted(data.jobId, data.url); } else { // Service reported error console.log(data.message); } }); }).on("error", (e) => { // Request error console.error(e); }); // Write request data postRequest.write(jsonPayload); postRequest.end(); function checkIfJobIsCompleted(jobId, resultFileUrl) { let queryPath = `/v1/job/check`; // JSON payload for api request let jsonPayload = JSON.stringify({ jobid: jobId }); let reqOptions = { host: "api.pdf.co", path: queryPath, method: "POST", headers: { "x-api-key": API_KEY, "Content-Type": "application/json", "Content-Length": Buffer.byteLength(jsonPayload, 'utf8') } }; // Send request var postRequest = https.request(reqOptions, (response) => { response.on("data", (d) => { response.setEncoding("utf8"); // Parse JSON response let data = JSON.parse(d); console.log(`Checking Job #${jobId}, Status: ${data.status}, Time: ${new Date().toLocaleString()}`); if (data.status == "working") { // Check again after 3 seconds setTimeout(function () { checkIfJobIsCompleted(jobId, resultFileUrl); }, 3000); } else if (data.status == "success") { // Download image file var file = fs.createWriteStream(DestinationFile); https.get(resultFileUrl, (response2) => { response2.pipe(file) .on("close", () => { console.log(`Generated image file saved as "${DestinationFile}" file.`); }); }); } else { console.log(`Operation ended with status: "${data.status}".`); } }) }); // Write request data postRequest.write(jsonPayload); postRequest.end(); }

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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