Program.cs
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 | 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( 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 response = webClient.DownloadString(url); JObject json = JObject.Parse(response); return Convert.ToString(json[ "Status" ]); } } } } |
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