Cloud API – PDF To Text – C# – Convert PDF To Text From URL Asynchronously

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Cloud API – PDF To Text – C# – Convert PDF To Text From URL Asynchronously
Cloud API – PDF To Text – C# – Convert PDF To Text From URL Asynchronously

Program.cs
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using System;
using System.IO;
using System.Net;
using System.Threading;
using Newtonsoft.Json.Linq;
 
// Cloud API asynchronous "PDF To Text" job example.
// Allows to avoid timeout errors when processing huge or scanned PDF documents.
 
namespace ByteScoutWebApiExample
{
    class Program
    {
        // (!) If you are getting '(403) Forbidden' error please ensure you have set the correct API_KEY
         
        // The authentication key (API Key).
        // Get your own by registering at https://secure.bytescout.com/users/sign_up
        const String API_KEY = "***********************************";
         
        // Direct URL of source PDF file.
        const string SourceFileUrl = "https://s3-us-west-2.amazonaws.com/bytescout-com/files/demo-files/cloud-api/pdf-to-text/long-processed-document.pdf";
        // Comma-separated list of page indices (or ranges) to process. Leave empty for all pages. Example: '0,2-5,7-'.
        const string Pages = "";
        // PDF document password. Leave empty for unprotected documents.
        const string Password = "";
        // Destination TXT file name
        const string DestinationFile = @".\result.txt";
        // (!) Make asynchronous job
        const bool Async = true;
 
 
        static void Main(string[] args)
        {
            // Create standard .NET web client instance
            WebClient webClient = new WebClient();
 
            // Set API Key
            webClient.Headers.Add("x-api-key", API_KEY);
 
            // Prepare URL for `PDF To Text` API call
            string query = Uri.EscapeUriString(string.Format(
                "https://api.pdf.co/v1/pdf/convert/to/text?name={0}&password={1}&pages={2}&url={3}&async={4}",
                Path.GetFileName(DestinationFile),
                Password,
                Pages,
                SourceFileUrl,
                Async));
 
            try
            {
                // Execute request
                string response = webClient.DownloadString(query);
 
                // Parse JSON response
                JObject json = JObject.Parse(response);
 
                if (json["error"].ToObject<bool>() == false)
                {
                    // Asynchronous job ID
                    string jobId = json["jobId"].ToString();
                    // URL of generated TXT file that will be available after the job completion
                    string resultFileUrl = json["url"].ToString();
 
                    // Check the job status in a loop. 
                    // If you don't want to pause the main thread you can rework the code 
                    // to use a separate thread for the status checking and completion.
                    do
                    {
                        string status = CheckJobStatus(jobId); // Possible statuses: "InProgress", "Failed", "Aborted", "Finished".
 
                        // Display timestamp and status (for demo purposes)
                        Console.WriteLine(DateTime.Now.ToLongTimeString() + ": " + status);
 
                        if (status == "Finished")
                        {
                            // Download TXT file
                            webClient.DownloadFile(resultFileUrl, DestinationFile);
 
                            Console.WriteLine("Generated TXT file saved as \"{0}\" file.", DestinationFile);
                            break;
                        }
                        else if (status == "InProgress")
                        {
                            // Pause for a few seconds
                            Thread.Sleep(3000);
                        }
                        else
                        {
                            Console.WriteLine(status);
                            break;
                        }
                    }
                    while (true);
                }
                else
                {
                    Console.WriteLine(json["message"].ToString());
                }
            }
            catch (WebException e)
            {
                Console.WriteLine(e.ToString());
            }
 
            webClient.Dispose();
 
 
            Console.WriteLine();
            Console.WriteLine("Press any key...");
            Console.ReadKey();
        }
 
        static string CheckJobStatus(string jobId)
        {
            using (WebClient webClient = new WebClient())
            {
                string url = "https://api.pdf.co/v1/job/check?jobid=" + jobId;
 
                string response = webClient.DownloadString(url);
                JObject json = JObject.Parse(response);
 
                return Convert.ToString(json["Status"]);
            }
        }
    }
}
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Cloud API – PDF To Text – C# – Convert PDF To Text From URL Asynchronously

Cloud API – PDF To Text – C# – Convert PDF To Text From URL Asynchronously

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