' Copyright (c) 2021 ActivePDF, Inc.
' ActivePDF OCR 2017
' Example generated 03/06/21
Imports System
Imports System.IO
Imports System.Net
Imports System.Net.Http
Imports System.Net.Http.Headers
Public Class Examples
Sub Example()
Dim Folder As String = AppDomain.CurrentDomain.BaseDirectory
Dim InputFile As String = Folder + "multipage.tif"
Dim OutputFile As String = Folder + "new.pdf"
Dim result As String = String.Empty
Using client As New HttpClient()
Dim token As String = String.Empty
Dim uri As New Uri("http://localhost:62625/api/OCR/Conversion")
' Set the Access Token for authorization
token = "<<insert token here>>"
Dim ahv As New AuthenticationHeaderValue("Bearer", token)
client.DefaultRequestHeaders.Authorization = ahv
' Multipart form post
Dim content As New MultipartFormDataContent()
' Input file as a file stream
Dim fs As FileStream = File.OpenRead(InputFile)
Dim streamContent As New StreamContent(fs)
streamContent.Headers.Add("Content-Type", "application/octet-stream")
streamContent.Headers.Add("Content-Disposition", "form-data; name=""InputFile""; filename=""" + Path.GetFileName(InputFile) + """")
content.Add(streamContent, "InputFile", Path.GetFileName(InputFile))
' Each setting can be passed in here as a new StringContent
content.Add(New StringContent("0"), "OCRType")
content.Add(New StringContent("1"), "PictureHandling")
content.Add(New StringContent("4"), "PDFVersion")
content.Add(New StringContent("1"), "Linearize")
' Post the content to the endpoint (uri)
Dim hrm As HttpResponseMessage = client.PostAsync(uri, content).Result
If hrm.StatusCode = HttpStatusCode.OK Then
' Get the resulting output of the post which is the PDF file created with OCR
Dim bytes As Byte() = hrm.Content.ReadAsByteArrayAsync().Result
' Specify where to save the PDF
File.WriteAllBytes(OutputFile, bytes)
Else
' Get the error message if something went wrong
Dim errorMsg As String = hrm.Content.ReadAsStringAsync().Result
WriteResults(errorMsg)
End If
End Using
' Process Complete
WriteResults("Done!")
End Sub
' Write output data
Sub WriteResults(content As String)
' Choose where to write out results
' Debug output
'System.Diagnostics.Debug.WriteLine("ActivePDF: * " + content)
' Console
Console.WriteLine(content)
' Log file
'Using tw = New System.IO.StreamWriter(AppDomain.CurrentDomain.BaseDirectory & "application.log", True)
' tw.WriteLine("[" + DateTime.Now.ToString("MM/dd/yyyy HH:mm:ss") + "]: => " + content)
'End Using
End Sub
End Class
