Protect PDF Document - C#
PDF Password And Security sample in C# demonstrating ‘Protect PDF Document’
Program.cs
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
namespace ByteScoutWebApiExample
{
class Program
{
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co
const String API_KEY = "***********************************";
// Source PDF file
const string SourceFile = @".\sample.pdf";
// Destination PDF file name
const string DestinationFile = @".\protected.pdf";
// Passwords to protect PDF document
// The owner password will be required for document modification.
// The user password only allows to view and print the document.
const string OwnerPassword = "123456";
const string UserPassword = "654321";
// Encryption algorithm.
// Valid values: "RC4_40bit", "RC4_128bit", "AES_128bit", "AES_256bit".
const string EncryptionAlgorithm = "AES_128bit";
// Allow or prohibit content extraction for accessibility needs.
const bool AllowAccessibilitySupport = true;
// Allow or prohibit assembling the document.
const bool AllowAssemblyDocument = true;
// Allow or prohibit printing PDF document.
const bool AllowPrintDocument = true;
// Allow or prohibit filling of interactive form fields (including signature fields) in PDF document.
const bool AllowFillForms = true;
// Allow or prohibit modification of PDF document.
const bool AllowModifyDocument = true;
// Allow or prohibit copying content from PDF document.
const bool AllowContentExtraction = true;
// Allow or prohibit interacting with text annotations and forms in PDF document.
const bool AllowModifyAnnotations = true;
// Allowed printing quality.
// Valid values: "HighResolution", "LowResolution"
const string PrintQuality = "HighResolution";
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);
// Upload file to the cloud
string uploadedFileUrl = UploadFile(SourceFile);
// PROTECT UPLOADED PDF DOCUMENT
// Prepare requests params as JSON
// See documentation: https://apidocs.pdf.co/?#pdf-security
Dictionary<string, object> parameters = new Dictionary<string, object>();
parameters.Add("name", Path.GetFileName(DestinationFile));
parameters.Add("url", uploadedFileUrl);
parameters.Add("ownerPassword", OwnerPassword);
parameters.Add("userPassword", UserPassword);
parameters.Add("encryptionAlgorithm", EncryptionAlgorithm);
parameters.Add("allowAccessibilitySupport", AllowAccessibilitySupport);
parameters.Add("allowAssemblyDocument", AllowAssemblyDocument);
parameters.Add("allowPrintDocument", AllowPrintDocument);
parameters.Add("allowFillForms", AllowFillForms);
parameters.Add("allowModifyDocument", AllowModifyDocument);
parameters.Add("allowContentExtraction", AllowContentExtraction);
parameters.Add("allowModifyAnnotations", AllowModifyAnnotations);
parameters.Add("printQuality", PrintQuality);
// Convert dictionary of params to JSON
string jsonPayload = JsonConvert.SerializeObject(parameters);
try
{
// URL of "PDF Security" endpoint
string url = "https://api.pdf.co/v1/pdf/security/add";
// Execute POST request with JSON payload
string response = webClient.UploadString(url, jsonPayload);
// Parse JSON response
JObject json = JObject.Parse(response);
if (json["error"].ToObject<bool>() == false)
{
// Get URL of generated PDF file
string resultFileUrl = json["url"].ToString();
// Download generated PDF file
webClient.DownloadFile(resultFileUrl, DestinationFile);
Console.WriteLine("Generated PDF file saved as \"{0}\" file.", DestinationFile);
}
else
{
Console.WriteLine(json["message"].ToString());
}
}
catch (WebException e)
{
Console.WriteLine(e.ToString());
}
webClient.Dispose();
Console.WriteLine();
Console.WriteLine("Press any key...");
Console.ReadKey();
}
/// <summary>
/// Uploads file to the cloud and return URL of uploaded file to use in further API calls.
/// </summary>
/// <param name="file">Source file name (path).</param>
/// <returns>URL of uploaded file</returns>
static string UploadFile(string file)
{
// Create standard .NET web client instance
WebClient webClient = new WebClient();
// Set API Key
webClient.Headers.Add("x-api-key", API_KEY);
try
{
// 1. RETRIEVE THE PRESIGNED URL TO UPLOAD THE FILE.
// * If you already have a direct file URL, skip to the step 3.
// Prepare URL for `Get Presigned URL` API call
string query = Uri.EscapeUriString(string.Format(
"https://api.pdf.co/v1/file/upload/get-presigned-url?contenttype=application/octet-stream&name={0}",
Path.GetFileName(file)));
// Execute request
string response = webClient.DownloadString(query);
// Parse JSON response
JObject json = JObject.Parse(response);
if (json["error"].ToObject<bool>() == 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", file); // You can use UploadData() instead if your file is in byte[] or Stream
return uploadedFileUrl;
}
else
{
// Display service reported error
Console.WriteLine(json["message"].ToString());
}
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
finally
{
webClient.Dispose();
}
return null;
}
}
}
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