Streaming a pdf file to the browser from a LotusSc

问题:

I'm creating a LotusScript web agent that reads the content of a pdf file somewhere on the network and returns it as a stream to the browser.

the agent will be called like this : getPDF?openAgent&pdfId=123456 and it should directly returns the pdf stream. (I didn't implement yet the url parameter catching)

Here's my current try, I still have an issue to convert the read buffer to the final stream

Sub Initialize
    On Error GoTo errrorhandle
    Dim session As New NotesSession
    Dim stream As NotesStream
    Set stream = session.CreateStream
    Dim buffer As variant
    Dim fileNum As Integer
    Dim txt As String
    Dim filename As String
    Dim filecontent As String

    filename = "C:\temp\test.PDF"

    If Not stream.Open(filename,"binary") Then
        MessageBox filename,, "Open failed"
        Exit Sub
    End If

    If stream.Bytes = 0 Then
        MessageBox filename,, "File has no content"
        Exit Sub
    End If

    Print "content-type:application/pdf"
    Do
        buffer =  stream.read(1)
        Print buffer(0)
    Loop Until stream.IsEOS

    Call stream.Close

    Exit Sub
errrorhandle :
    Print "Error :" & Error & " at line : " & Erl
    Exit sub
End Sub

回答1:

It is not possible to output the pdf from a stream in Lotusscript.

I suggest you attach the pdf to a notesdocument and redirect the user to attached file url and later on remove the document.

you can get a hold of the saved pdf using the following syntax http://server/database/unid/$File/myfile.pdf

回答2:

Following on Thomas Adrian response, attaching the pdf into a document in a database and then serve the link as described is the best solution.

Keep in mind that this will require the user to be authenticated, if said database has or needs restricted access.

If the web users are not authenticated users, you'll need to give at least reader access to "Anonymous" in the ACL of the hosting database for this to work... which is not always advisable if the database has other purposes.

You can however create a dedicated database just for this purpose, with unrestricted ACL access.