Cloud API - PDF To Image - C# - Convert PDF To JPEG From Uploaded File - ByteScout

Cloud API – PDF To Image – C# – Convert PDF To JPEG From Uploaded File

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Cloud API – PDF To Image – C# – Convert PDF To JPEG From Uploaded File

Program.cs

[csharp]
using System;
using System.IO;
using System.Net;
using Newtonsoft.Json.Linq;

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 = “***********************************”;

// Source PDF file
const string SourceFile = @”.\sample.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 = “”;

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);

// 1. RETRIEVE THE PRESIGNED URL TO UPLOAD THE FILE.
// * If you already have the direct file URL, skip to the step 3.

// Prepare URL for `Get Presigned URL` API call
string query = Uri.EscapeUriString(string.Format(
“https://bytescout.io/v1/file/upload/get-presigned-url?contenttype=application/octet-stream&name={0}”,
Path.GetFileName(SourceFile)));

try
{
// Execute request
string response = webClient.DownloadString(query);

// Parse JSON response
JObject json = JObject.Parse(response);

if (json[“error”].ToObject() == false)
{
// Get URL to use for the file upload
string uploadUrl = json[“presignedUrl”].ToString();
// Get URL of uploaded file to use with later API calls
string uploadedFileUrl = json[“url”].ToString();

// 2. UPLOAD THE FILE TO CLOUD.

webClient.Headers.Add(“content-type”, “application/octet-stream”);
webClient.UploadFile(uploadUrl, “PUT”, SourceFile); // You can use UploadData() instead if your file is byte[] or Stream

// 3. CONVERT UPLOADED PDF FILE TO JPEG

// Prepare URL for `PDF To JPEG` API call
query = Uri.EscapeUriString(string.Format(
“https://bytescout.io/v1/pdf/convert/to/jpg?password={0}&pages={1}&url={2}”,
Password,
Pages,
uploadedFileUrl));

// Execute request
response = webClient.DownloadString(query);

// Parse JSON response
json = JObject.Parse(response);

if (json[“error”].ToObject() == false)
{
// Download generated JPEG files
int page = 1;
foreach (JToken token in json[“urls”])
{
string resultFileUrl = token.ToString();
string localFileName = String.Format(@”.\page{0}.jpg”, page);

webClient.DownloadFile(resultFileUrl, localFileName);

Console.WriteLine(“Downloaded \”{0}\”.”, localFileName);
page++;
}
}
else
{
Console.WriteLine(json[“message”].ToString());
}
}
else
{
Console.WriteLine(json[“message”].ToString());
}
}
catch (WebException e)
{
Console.WriteLine(e.ToString());
}

webClient.Dispose();

Console.WriteLine();
Console.WriteLine(“Press any key…”);
Console.ReadKey();
}
}
}

[/csharp]


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