Remove PDF Document Protection - VB.NET
PDF Password And Security sample in VB.NET demonstrating ‘Remove PDF Document Protection’
Module1.vb
Imports System.IO
Imports System.Net
Imports Newtonsoft.Json
Imports Newtonsoft.Json.Linq
Module Module1
' The authentication key (API Key).
' Get your own by registering at https://app.pdf.co
Const API_KEY As String = "*****************************"
' Source PDF file url
' You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/bytescout/pdf-co-api-samples/tree/master/File%20Upload/
Const SourceFileUrl As String = "https://bytescout-com.s3-us-west-2.amazonaws.com/files/demo-files/cloud-api/pdf-security/ProtectedPDFFile.pdf"
' The owner/user password to open file And to remove security features
Const PDFFilePassword As String = "admin@123"
' Destination file
Const DestinationFile As String = "./unprotected.pdf"
Sub Main()
' Runs processing asynchronously.
' Returns Use JobId that you may use with /job/check to check state of the processing (possible states: working, failed, aborted And success).
Dim async As Boolean = False
' Create standard .NET web client instance
Dim webClient As WebClient = New WebClient()
' Set API Key
webClient.Headers.Add("x-api-key", API_KEY)
' Set JSON content type
webClient.Headers.Add("Content-Type", "application/json")
' URL of "Remove PDF Security" endpoint
Dim url As String = "https://api.pdf.co/v1/pdf/security/remove"
' Prepare requests params as JSON
' See documentation: https : //apidocs.pdf.co
Dim parameters As New Dictionary(Of String, Object)
parameters.Add("name", Path.GetFileName(DestinationFile))
parameters.Add("url", SourceFileUrl)
parameters.Add("password", PDFFilePassword)
parameters.Add("async", async)
' Convert dictionary of params to JSON
Dim jsonPayload As String = JsonConvert.SerializeObject(parameters)
Try
' Execute POST request with JSON payload
Dim response As String = webClient.UploadString(url, jsonPayload)
' Parse JSON response
Dim json As JObject = JObject.Parse(response)
If json("error").ToObject(Of Boolean) = False Then
' Get URL of generated PDF file
Dim resultFileUrl As String = json("url").ToString()
' Download PDF file
webClient.DownloadFile(resultFileUrl, DestinationFile)
Console.WriteLine("Generated PDF file saved as ""{0}"" file.", DestinationFile)
Else
Console.WriteLine(json("message").ToString())
End If
Catch ex As WebException
Console.WriteLine(ex.ToString())
End Try
webClient.Dispose()
Console.WriteLine()
Console.WriteLine("Press any key...")
Console.ReadKey()
End Sub
End Module
PDF.co Web API: the Web API with a set of tools for documents manipulation, data conversion, data extraction, splitting and merging of documents. Includes image recognition, built-in OCR, barcode generation and barcode decoders to decode bar codes from scans, pictures and pdf.
Download Source Code (.zip)
return to the previous page explore PDF Password And Security endpoint
Copyright © 2016 - 2023 PDF.co