How to split PDF from uploaded file (node for PDF splitting API in JavaScript with PDF.co Web API

How to split PDF from uploaded file (node for PDF splitting API in JavaScript: How To Tutorial

Every ByteScout tool contains example JavaScript source codes that you can find here or in the folder with installed ByteScout product. PDF.co Web API was made to help with PDF splitting API in JavaScript. 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.

This rich sample source code in JavaScript for PDF.co Web API includes the number of functions and options you should do calling the API to implement PDF splitting API. Open your JavaScript project and simply copy & paste the code and then run your app! Further enhancement of the code will make it more vigorous.

ByteScout free trial version is available for FREE download from our website. Programming tutorials along with source code samples are included.

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SplitPdfFromUploadedFile.js
      
/*jshint esversion: 6 */ 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 to split const SourceFile = "./sample.pdf"; // Comma-separated list of page numbers (or ranges) to process. Example: '1,3-5,7-'. const Pages = "1-2,3-"; // 1. RETRIEVE PRESIGNED URL TO UPLOAD FILE. getPresignedUrl(API_KEY, SourceFile) .then(([uploadUrl, uploadedFileUrl]) => { // 2. UPLOAD THE FILE TO CLOUD. uploadFile(API_KEY, SourceFile, uploadUrl) .then(() => { // 3. SPLIT UPLOADED PDF splitPdf(API_KEY, uploadedFileUrl, Pages); }) .catch(e => { console.log(e); }); }) .catch(e => { console.log(e); }); function getPresignedUrl(apiKey, localFile) { return new Promise(resolve => { // Prepare request to `Get Presigned URL` API endpoint let queryPath = `/v1/file/upload/get-presigned-url?contenttype=application/octet-stream&name=${path.basename(SourceFile)}`; let reqOptions = { host: "api.pdf.co", path: encodeURI(queryPath), headers: { "x-api-key": API_KEY } }; // Send request https.get(reqOptions, (response) => { response.on("data", (d) => { let data = JSON.parse(d); if (data.error == false) { // Return presigned url we received resolve([data.presignedUrl, data.url]); } else { // Service reported error console.log("getPresignedUrl(): " + data.message); } }); }) .on("error", (e) => { // Request error console.log("getPresignedUrl(): " + e); }); }); } function uploadFile(apiKey, localFile, uploadUrl) { return new Promise(resolve => { fs.readFile(SourceFile, (err, data) => { request({ method: "PUT", url: uploadUrl, body: data, headers: { "Content-Type": "application/octet-stream" } }, (err, res, body) => { if (!err) { resolve(); } else { console.log("uploadFile() request error: " + err); } }); }); }); } function splitPdf(apiKey, uploadedFileUrl, pages) { // Prepare request to `Make Searchable PDF` API endpoint var queryPath = `/v1/pdf/split?pages=${pages}&url=${uploadedFileUrl}&async=True`; let reqOptions = { host: "api.pdf.co", path: encodeURI(queryPath), method: "GET", headers: { "x-api-key": API_KEY } }; // Send request https.get(reqOptions, (response) => { response.on("data", (d) => { response.setEncoding("utf8"); // Parse JSON response let data = JSON.parse(d); if (data.error == false) { console.log(`Job #${data.jobId} has been created!`); checkIfJobIsCompleted(data.jobId, data.url); } else { // Service reported error console.log("splitPdf(): " + data.message); } }); }) .on("error", (e) => { // Request error console.log("splitPdf(): " + e); }); } function checkIfJobIsCompleted(jobId, resultFileUrlJson) { console.log("Here.."); let queryPath = `/v1/job/check?jobid=${jobId}`; let reqOptions = { host: "api.pdf.co", path: encodeURI(queryPath), method: "GET", headers: { "x-api-key": API_KEY } }; https.get(reqOptions, (response) => { response.on("data", (d) => { response.setEncoding("utf8"); // Parse JSON response let data = JSON.parse(d); console.log(`Checking Job #${jobId}, Status: ${data.status}, Time: ${new Date().toLocaleString()}`); if (data.status == "working") { // Check again after 3 seconds setTimeout(function () { checkIfJobIsCompleted(jobId, resultFileUrlJson) }, 3000); } else if (data.status == "success") { request({ method: 'GET', uri: resultFileUrlJson, gzip: true }, function (error, response, body) { // Parse JSON response let respJsonFileArray = JSON.parse(body); let part = 1; respJsonFileArray.forEach((url) => { var localFileName = `./part${part}.pdf`; var file = fs.createWriteStream(localFileName); https.get(url, (response2) => { response2.pipe(file) .on("close", () => { console.log(`Generated PDF file saved as "${localFileName} file."`); }); }); part++; }, this); }); } else { console.log(`Operation ended with status: "${data.status}".`); } }) }); }

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