How to PDF text search API in JavaScript with PDF.co Web API

This tutorial will show how to PDF text search API in JavaScript

The coding tutorials are designed to help you test the features without need to write your own code. Want to PDF text search API in your JavaScript app? PDF.co Web API is designed for it. PDF.co Web API is 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.

Fast application programming interfaces of PDF.co Web API for JavaScript plus the instruction and the code below will help you quickly learn how to PDF text search API. Follow the instructions from the scratch to work and copy the JavaScript code. Implementing 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.

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PDFTextSearchFromUploadedFileAsyncAPI.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 file name 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 = ""; // Search string. const SearchString = '[4-9][0-9].[0-9][0-9]'; // Regular expression to find numbers in format dd.dd and between 40.00 to 99.99 // Enable regular expressions (Regex) const RegexSearch = 'True'; // 1. RETRIEVE THE PRESIGNED URL TO UPLOAD THE FILE. getPresignedUrl(API_KEY, SourceFile) .then(([uploadUrl, uploadedFileUrl]) => { // 2. UPLOAD THE FILE TO CLOUD. uploadFile(API_KEY, SourceFile, uploadUrl) .then(() => { // 3. PDF Text Search FROM UPLOADED FILE pdfTextSearch(uploadedFileUrl); }) .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=${path.basename(SourceFile)}`; let reqOptions = { host: "api.pdf.co", path: encodeURI(queryPath), headers: { "x-api-key": API_KEY } }; // Send request https.get(reqOptions, (response) => { response.on("data", (d) => { let data = JSON.parse(d); if (data.error == false) { // Return presigned url we received resolve([data.presignedUrl, data.url]); } else { // Service reported error console.log("getPresignedUrl(): " + data.message); } }); }) .on("error", (e) => { // Request error console.log("getPresignedUrl(): " + e); }); }); } function uploadFile(apiKey, localFile, uploadUrl) { return new Promise(resolve => { fs.readFile(SourceFile, (err, data) => { request({ method: "PUT", url: uploadUrl, body: data, headers: { "Content-Type": "application/octet-stream" } }, (err, res, body) => { if (!err) { resolve(); } else { console.log("uploadFile() request error: " + e); } }); }); }); } function pdfTextSearch(uploadedFileUrl) { // Prepare URL for PDF text search API call. // See documentation: https://app.pdf.co/documentation/api/1.0/pdf/find.html var query = `https://api.pdf.co/v1/pdf/find`; let reqOptions = { uri: query, headers: { "x-api-key": API_KEY }, formData: { password: Password, pages: Pages, url: uploadedFileUrl, searchString: SearchString, regexSearch: RegexSearch, async: 'True' } }; // Send request request.get(reqOptions, function (error, response, body) { if (error) { return console.error("Error: ", error); } // Parse JSON response let data = JSON.parse(body); checkIfJobIsCompleted(data.jobId, data.url); }); } function checkIfJobIsCompleted(jobId, resultFileUrl) { let queryPath = `/v1/job/check?jobid=${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: ${new Date().toLocaleString()}`); if (data.status == "working") { // Check again after 3 seconds setTimeout(function () { checkIfJobIsCompleted(jobId, resultFileUrl); }, 3000); } else if (data.status == "success") { request({ method: 'GET', uri: resultFileUrl, gzip: true }, function (error, response, body) { // Parse JSON response let respJsonFileArray = JSON.parse(body); respJsonFileArray.forEach((element) => { console.log("Found text " + element["text"] + " at coordinates " + element["left"] + ", " + element["top"]); }, this); }); } else { console.log(`Operation ended with status: "${data.status}".`); } }) }); }

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