VB.NET - Email to PDF
PDF from Email sample in Email to PDF demonstrating ‘VB.NET’
Module1.vb
Imports System.Net
Imports System.Threading
Imports Newtonsoft.Json
Imports Newtonsoft.Json.Linq
' Cloud API asynchronous "PDF To result" job example.
' Allows to avoid timeout errors when processing huge or scanned PDF documents.
Module Module1
' The authentication key (API Key).
' Get your own by registering at https://app.pdf.co
Const API_KEY As String = "***********************************"
' Direct URL of source PDF file.
' 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/email-to-pdf/sample.eml"
' Ouput file path
Const DestinationFile As String = "output.pdf"
' (!) Make asynchronous job
Const Async As Boolean = True
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)
' Set JSON content type
webClient.Headers.Add("Content-Type", "application/json")
' Prepare URL for `PDF FROM Email` API call
Dim url As String = "https://api.pdf.co/v1/pdf/convert/from/email"
' Prepare requests params as JSON
' See documentation: https : //apidocs.pdf.co
Dim parameters As New Dictionary(Of String, Object)
' Link to input EML Or MSG file to be converted.
' You can pass link to file from Google Drive, Dropbox Or another online file service that can generate shareable links.
' You can also use built-in PDF.co cloud storage located at https:'app.pdf.co/files Or upload your file as temporary file right before making this API call (see Upload And Manage Files section for more details on uploading files via API).
parameters.Add("url", SourceFileUrl)
' True by default.
' Set to true to automatically embeds all attachments from original input email MSG Or EML fileas files into final output PDF.
' Set to false if you don't want to embed attachments so it will convert only the body of input email.
parameters.Add("embedAttachments", True)
' true by default.
' Converts attachments that are supported by API (doc, docx, html, png, jpg etc) into PDF And merges into output final PDF.
' Non-supported file types are added as PDF attachments (Adobe Reader Or another viewer maybe required to view PDF attachments).
' Set to false if you don't want to convert attachments from original email and want to embed them as original files (as embedded pdf attachments).
parameters.Add("convertAttachments", True)
' Can be Letter, A4, A5, A6 Or custom size Like 200x200
parameters.Add("paperSize", "Letter")
' Name of output PDF
parameters.Add("name", "email-with-attachments")
' Set to true to run as async job in background (recommended for heavy documents).
parameters.Add("async", True)
' 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
' Asynchronous job ID
Dim jobId As String = json("jobId").ToString()
' URL of generated result file that will available after the job completion
Dim resultFileUrl As String = json("url").ToString()
' Check the job status in a loop.
' If you don't want to pause the main thread you can rework the code
' to use a separate thread for the status checking and completion.
Do
Dim status As String = CheckJobStatus(jobId) ' Possible statuses: "working", "failed", "aborted", "success".
' Display timestamp and status (for demo purposes)
Console.WriteLine(DateTime.Now.ToLongTimeString() + ": " + status)
If status = "success" Then
' Download result file
webClient.DownloadFile(resultFileUrl, DestinationFile)
Console.WriteLine("Generated result file saved as ""{0}"" file.", DestinationFile)
Exit Do
ElseIf status = "working" Then
' Pause for a few seconds
Thread.Sleep(3000)
Else
Console.WriteLine(status)
Exit Do
End If
Loop
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
Function CheckJobStatus(jobId As String) As String
Using webClient As WebClient = New WebClient()
' Set API Key
webClient.Headers.Add("x-api-key", API_KEY)
Dim url As String = "https://api.pdf.co/v1/job/check?jobid=" + jobId
Dim response As String = webClient.DownloadString(url)
Dim json As JObject = JObject.Parse(response)
Return Convert.ToString(json("status"))
End Using
End Function
End Module
Module1.vb
Imports System.IO
Imports System.Net
Imports System.Threading
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 Email file. Both MSG or EML extensions are supported
Const SourceFile As String = ".\sample.eml"
' Destination file name
Const DestinationFile As String = ".\result.pdf"
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 a 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
' Set JSON content type
webClient.Headers.Add("Content-Type", "application/json")
' 3. Perform convert to PDF
' URL for `PDF FROM Email` API call
Dim url As String = "https://api.pdf.co/v1/pdf/convert/from/email"
' Prepare requests params as JSON
' See documentation: https : //apidocs.pdf.co
Dim parameters As New Dictionary(Of String, Object)
' Link to input EML Or MSG file to be converted.
' You can pass link to file from Google Drive, Dropbox Or another online file service that can generate shareable links.
' You can also use built-in PDF.co cloud storage located at https:'app.pdf.co/files Or upload your file as temporary file right before making this API call (see Upload And Manage Files section for more details on uploading files via API).
parameters.Add("url", uploadedFileUrl)
' True by default.
' Set to true to automatically embeds all attachments from original input email MSG Or EML fileas files into final output PDF.
' Set to false if you don't want to embed attachments so it will convert only the body of input email.
parameters.Add("embedAttachments", True)
' true by default.
' Converts attachments that are supported by API (doc, docx, html, png, jpg etc) into PDF And merges into output final PDF.
' Non-supported file types are added as PDF attachments (Adobe Reader Or another viewer maybe required to view PDF attachments).
' Set to false if you don't want to convert attachments from original email and want to embed them as original files (as embedded pdf attachments).
parameters.Add("convertAttachments", True)
' Can be Letter, A4, A5, A6 Or custom size Like 200x200
parameters.Add("paperSize", "Letter")
' Name of output PDF
parameters.Add("name", "email-with-attachments")
' Set to true to run as async job in background (recommended for heavy documents).
parameters.Add("async", True)
' Convert dictionary of params to JSON
Dim jsonPayload As String = JsonConvert.SerializeObject(parameters)
' Execute POST request with JSON payload
response = webClient.UploadString(url, jsonPayload)
' Parse JSON response
json = JObject.Parse(response)
If json("error").ToObject(Of Boolean) = False Then
' Asynchronous job ID
Dim jobId As String = json("jobId").ToString()
' URL of generated PDF file that will available after the job completion
Dim resultFileUrl As String = json("url").ToString()
' Check the job status in a loop.
' If you don't want to pause the main thread you can rework the code
' to use a separate thread for the status checking and completion.
Do
Dim status As String = CheckJobStatus(jobId) ' Possible statuses: "working", "failed", "aborted", "success".
' Display timestamp and status (for demo purposes)
Console.WriteLine(DateTime.Now.ToLongTimeString() + ": " + status)
If status = "success" Then
' Download Result file
webClient.DownloadFile(resultFileUrl, DestinationFile)
Console.WriteLine("Generated file saved as ""{0}"" file.", DestinationFile)
Exit Do
ElseIf status = "working" Then
' Pause for a few seconds
Thread.Sleep(3000)
Else
Console.WriteLine(status)
Exit Do
End If
Loop
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
''' <summary>
''' Check Job Status
''' </summary>
Function CheckJobStatus(jobId As String) As String
Using webClient As WebClient = New WebClient()
' Set API Key
webClient.Headers.Add("x-api-key", API_KEY)
Dim url As String = "https://api.pdf.co/v1/job/check?jobid=" + jobId
Dim response As String = webClient.DownloadString(url)
Dim json As JObject = JObject.Parse(response)
Return Convert.ToString(json("status"))
End Using
End Function
End Module
Program.vb
Imports System
Imports RestSharp
Namespace HelloWorldApplication
Class HelloWorld
Private Shared Sub Main(ByVal args As String())
Dim client = New RestClient("https://api.pdf.co/v1/pdf/convert/from/email")
client.Timeout = -1
Dim request = New RestRequest(Method.POST)
request.AddHeader("Content-Type", "application/json")
request.AddHeader("x-api-key", "{{x-api-key}}")
' 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/
request.AddParameter("application/json", "{" & vbLf & " ""url"": ""https://bytescout-com.s3-us-west-2.amazonaws.com/files/demo-files/cloud-api/email-to-pdf/sample.eml""," & vbLf & " ""embedAttachments"": true," & vbLf & " ""name"": ""email-with-attachments""," & vbLf & " ""async"": false," & vbLf & " ""encrypt"": false," & vbLf & " ""profiles"": ""{\""orientation\"": \""landscape\"", \""paperSize\"": \""letter\"" }""" & vbLf & "}", ParameterType.RequestBody)
Dim response As IRestResponse = client.Execute(request)
Console.WriteLine(response.Content)
End Sub
End Class
End Namespace
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.