Link Search Menu Expand Document

Add Text by finding target coordinates (Node.js) - JavaScript

PDF Add Text, Signatures and Images to PDF sample in JavaScript demonstrating ‘Add Text by finding target coordinates (Node.js)’

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 = "*****************************";

// Direct URL of source PDF file.
// 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 SourceFileUrl = "https://bytescout-com.s3.amazonaws.com/files/demo-files/cloud-api/pdf-edit/sample.pdf";

// Search string. 
const SearchString = 'Notes';

// Prepare URL for PDF text search API call.
// See documentation: https://apidocs.pdf.co/07-pdf-search-text
var queryFindText = `/v1/pdf/find`;

// JSON payload for find text
var jsonPayload_findText = JSON.stringify({ url: SourceFileUrl, searchString: SearchString });

let reqOptionsFindText = {
    host: "api.pdf.co",
    path: queryFindText,
    method: "POST",
    headers: {
        "x-api-key": API_KEY,
        "Content-Type": "application/json",
        "Content-Length": Buffer.byteLength(jsonPayload_findText, 'utf8')
    }
};

let chunks = [];

// Send request
var postRequest_FindText = https.request(reqOptionsFindText, (response_findText) => {
    response_findText.on("data", (data) => {
        chunks.push(data);
    }).on("end", function () {
        let d_findText = Buffer.concat(chunks);

        // Parse JSON response
        let dataFindText = JSON.parse(d_findText);
        if (dataFindText.body.length > 0) {
            var element = dataFindText.body[0];
            console.log("Found text " + element["text"] + " at coordinates " + element["left"] + ", " + element["top"]);

            // 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";

            // Text annotation params
            const X = +element["left"];
            const Y = +element["top"] + 25;
            const Text = "Some notes will go here... Some notes will go here.... Some notes will go here.....";
            const FontName = "Times New Roman";
            const FontSize = 12;
            const Color = "FF0000";

            // * Add Text *
            // 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,
                annotations: [{
                    text: Text,
                    x: X,
                    y: Y,
                    pages: Pages,
                    fontname: FontName,
                    size: FontSize,
                    color: Color
                }]
            });

            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();

        } else {
            console.error("No result found.");
        }
    }).on("error", (e) => {
        console.error("Error: ", error);
    })
});

// Write request data
postRequest_FindText.write(jsonPayload_findText);
postRequest_FindText.end();

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.

Get your PDF.co API key here!

Download Source Code (.zip)

return to the previous page explore PDF Add Text, Signatures and Images to PDF endpoint