PDF.co Web API - Add Text And Images To PDF - JavaScript - Add Image to Existing PDF Base64 (Node.js)

printable version:
PDF-co-Web-API-JavaScript-Add-Image-to-Existing-PDF-Base64-(Node-js).pdf

How to add text and images to PDF in JavaScript with PDF.co Web API

PDF.co Web API is the Rest API that provides set of data extraction functions, tools for documents manipulation, splitting and merging of pdf files. Includes built-in OCR, images recognition, can generate and read barcodes from images, scans and pdf.

On-demand (REST Web API) version:
Web API (on-demand version)

On-premise offline SDK for Windows:
60 Day Free Trial (on-premise)

app.js

      var https = require("https");
var path = require("path");
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 PDF file.
const SourceFile = "./sample.pdf";

// Comma-separated list of page indices (or ranges) to process. Leave empty for all pages. Example: '0,2-5,7-'.
const Pages = "";

// PDF document password. Leave empty for unprotected documents.
const Password = "";

// Destination PDF file name
const DestinationFile = "./result.pdf";

// Image params
const Type = "image";
const X = 400;
const Y = 20;
const Width = 119;
const Height = 32;

// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/bytescout/pdf-co-api-samples/tree/master/File%20Upload/    
const ImageUrl = "https://bytescout-com.s3.amazonaws.com/files/demo-files/cloud-api/pdf-edit/logo.png";

// Input file Base64
const SourceFileBase64 = fs.readFileSync(SourceFile, { encoding: 'base64' });

// 1. Get Uploaded File Url from Base64 Source
uploadBase64ToPDFco(SourceFileBase64, 'sample.pdf')
    .then((respBase64FileUrl) => {
        // 2. Add Image to PDF
        addImageToPdf(respBase64FileUrl, DestinationFile);
    })
    .catch(e => {
        console.log(e);
    });;


function addImageToPdf(sourceFileUrl, destinationFile) {
    // * Add image *
    // Prepare request to `PDF Edit` API endpoint
    var queryPath = `/v1/pdf/edit/add`;

    // JSON payload for api request
    var jsonPayload = JSON.stringify(
        {
            name: path.basename(destinationFile),
            password: Password,
            url: sourceFileUrl,
            images: [
                {
                    url: ImageUrl,
                    x: X,
                    y: Y,
                    width: Width,
                    height: Height,
                    pages: Pages
                }]
        });

    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) {
                // Download the PDF file
                var file = fs.createWriteStream(destinationFile);
                https.get(data.url, (response2) => {
                    response2.pipe(file).on("close", () => {
                        console.log(`Generated PDF file saved to '${destinationFile}' file.`);
                    });
                });
            }
            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 uploadBase64ToPDFco(SourceFileBase64, inputFileName) {
    return new Promise(resolve => {
        var options = {
            'method': 'POST',
            'url': 'https://api.pdf.co/v1/file/upload/base64',
            'headers': {
                'x-api-key': API_KEY
            },
            formData: {
                'file': SourceFileBase64,
                'name': inputFileName
            }
        };

        request(options, function (err, res, body) {
            if (!err) {
                var data = JSON.parse(res.body)
                resolve(data.url);
            }
            else {
                console.log("uploadFile() request error: " + e);
            }
        });
    });
}

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"
  }
}