Convert Web Page To PDF From Link Asynchronously | C# | HTML To PDF APIByteScout PDF SDK

Convert Web Page To PDF From Link Asynchronously | C# | HTML To PDF API

Program.cs:

C#
using System;
using System.IO;
using System.Net;
using Newtonsoft.Json.Linq;
using System.Threading;


// Cloud API asynchronous "Web Page to PDF" job example.
// Allows to avoid timeout errors when processing heavy web pages.

namespace ByteScoutWebApiExample
{
    class Program
    {
        // The authentication key (API Key).
        // Get your own by registering at https://app.pdf.co/documentation/api
        const String API_KEY = "***********************************";

        // URL of web page to convert to PDF document.
        const string SourceUrl = "http://www.usa.gov";
        // Destination PDF file name
        const string DestinationFile = @".\result.pdf";
        // (!) 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 `Web Page to PDF` API call
            string query = Uri.EscapeUriString(string.Format(
                "https://api.pdf.co/v1/pdf/convert/from/url?name={0}&url={1}&async={2}",
                Path.GetFileName(DestinationFile),
                SourceUrl,
                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 PDF file that will 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: "working", "failed", "aborted", "success".

                        // Display timestamp and status (for demo purposes)
                        Console.WriteLine(DateTime.Now.ToLongTimeString() + ": " + status);

                        if (status == "success")
                        {
                            // Download PDF file
                            webClient.DownloadFile(resultFileUrl, DestinationFile);

                            Console.WriteLine("Generated PDF file saved as \"{0}\" file.", DestinationFile);
                            break;
                        }
                        else if (status == "working")
                        {
                            // 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())
            {
                // Set API Key
                webClient.Headers.Add("x-api-key", API_KEY);

                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"]);
            }
        }
    }
}