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Cloud API – PDF To HTML API – VB.NET – Convert PDF To HTML From Uploaded File

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Cloud API – PDF To HTML API – VB.NET – Convert PDF To HTML From Uploaded File

Module1.vb

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Imports System.IO
Imports System.Net
Imports Newtonsoft.Json.Linq
 
Module Module1
 
    ' The authentication key (API Key).
    ' Get your own by registering at https://app.pdf.co/documentation/api
    Const API_KEY As String = "***********************************"
 
    ' Source PDF file
    const SourceFile as String = ".\sample.pdf"
    ' Comma-separated list of page indices (or ranges) to process. Leave empty for all pages. Example: '0,2-5,7-'.
    const Pages as String = ""
    ' PDF document password. Leave empty for unprotected documents.
    const Password As String = ""
    ' Destination HTML file name
    const DestinationFile as String = ".\result.html"
    ' Set to `true` to get simplified HTML without CSS. Default is the rich HTML keeping the document design.
    const PlainHtml as Boolean = False
    ' Set to `true` if your document has the column layout like a newspaper.
    const ColumnLayout as Boolean = False
 
    Sub Main()
 
        ' Create standard .NET web client instance
        Dim webClient As 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
        Dim query As string = Uri.EscapeUriString(string.Format(
            "https://api.pdf.co/v1/file/upload/get-presigned-url?contenttype=application/octet-stream&name={0}",
            Path.GetFileName(SourceFile)))
 
        Try
            ' Execute request
            Dim response As string = webClient.DownloadString(query)
 
            ' Parse JSON response
            Dim json As JObject = JObject.Parse(response)
 
            If json("error").ToObject(Of Boolean) = False Then
                ' Get URL to use for the file upload
                Dim uploadUrl As string = json("presignedUrl").ToString()
                ' Get URL of uploaded file to use with later API calls
                Dim uploadedFileUrl As string = 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 array or Stream
                 
                ' 3. CONVERT UPLOADED PDF FILE TO HTML
 
                ' Prepare URL for `PDF To HTML` API call
                query = Uri.EscapeUriString(String.Format(
                    "https://api.pdf.co/v1/pdf/convert/to/html?name={0}&password={1}&pages={2}&simple={3}&columns={4}&url={5}",
                    Path.GetFileName(DestinationFile),
                    Password,
                    Pages,
                    PlainHtml,
                    ColumnLayout,
                    uploadedFileUrl))
 
                ' Execute request
                response = webClient.DownloadString(query)
 
                ' Parse JSON response
                json = JObject.Parse(response)
 
                If json("error").ToObject(Of Boolean) = False Then
                 
                    ' Get URL of generated HTML file
                    Dim resultFileUrl As string = json("url").ToString()
 
                    ' Download HTML file
                    webClient.DownloadFile(resultFileUrl, DestinationFile)
 
                    Console.WriteLine("Generated HTML file saved as ""{0}"" file.", DestinationFile)
 
                Else
                    Console.WriteLine(json("message").ToString())
                End If
 
            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

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