How to read barcode from file (node for barcode reader API in JavaScript with PDF.co Web API

Tutorial: how to read barcode from file (node for barcode reader API in JavaScript

Today we will explain the steps and algorithm of how to read barcode from file (node and how to make it work in your application. Barcode reader API in JavaScript can be implemented with PDF.co Web API. PDF.co Web API is 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.

JavaScript code snippet like this for PDF.co Web API works best when you need to quickly implement barcode reader API in your JavaScript application. Follow the instruction and copy – paste code for JavaScript into your project’s code editor. Writing JavaScript application typically includes multiple stages of the software development so even if the functionality works please test it with your data and the production environment.

Our website provides free trial version of PDF.co Web API that includes source code samples to help with your JavaScript project.

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ReadBarcodeFromFile.js
      
/*jshint esversion: 6 */ var fs = require("fs"); // `request` module is required for file upload. // Use "npm install request" command to install. var request = require("request"); // The authentication key (API Key). // Get your own by registering at https://app.pdf.co/documentation/api const API_KEY = "******************************"; // Source file name const SourceFile = "./sample.pdf"; // Comma-separated list of barcode types to search. // See valid barcode types in the documentation https://app.pdf.co/documentation/api/1.0/barcode/read_from_url.html const BarcodeTypes = "Code128,Code39,Interleaved2of5,EAN13"; // Comma-separated list of page indices (or ranges) to process. Leave empty for all pages. Example: '0,2-5,7-'. const Pages = ""; // Prepare request to `Barcode Reader` API endpoint var query = `https://api.pdf.co/v1/barcode/read/from/url`; let reqOptions = { uri: query, headers: { "x-api-key": API_KEY }, formData: { types: BarcodeTypes, pages: Pages, file: fs.createReadStream(SourceFile) } }; // Send request request.post(reqOptions, function (error, response, body) { if (error) { return console.error("Error: ", error); } // Parse JSON response let data = JSON.parse(body); data.barcodes.forEach((element) => { console.log("Found barcode:"); console.log(" Type: " + element["TypeName"]); console.log(" Value: " + element["Value"]); console.log(" Document Page Index: " + element["Page"]); console.log(" Rectangle: " + element["Rect"]); console.log(" Confidence: " + element["Confidence"]); console.log(); }, this); });

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