Create PDF and transfer it via REST
Hello, I want to create PDF from HTML source. I found pandoc. I installed pandoc on IRIS container image. I created Interoperability production. I have setup REST service to receive HTML file in request body. I call pandoc command pandoc -o output.pdf input.html from a BPL process. I copy output.pdf file stream into response body. I save the response at the source. I get a file named output.pdf but it does not load in Acrobat. I suspect I am doing something wrong with headers (accept-encoding?) or maybe do I need to base64 encode the pdf file to transfer it via REST?
Product version: IRIS 2022.2
Have you tried to open the pdf in a text editor like notepad++ to see what it looks like? It might be that the stream is incomplete, or you're writing the base64 to the file output without decoding?
Does the file generated from pandoc (the initial output.pdf) readable?
I confirmed the file is readable and displays correctly.
The first file I tried to convert to PDF displays at the source system, but it does not look exactly as expected. I copy ther pdf to csp directory and display it there. I also tried a simple html file and it works correctly end-2-end.
I have seen files transferred inside JSON and I want to try it here. Before (now) I have this code to generate response object:
Set context.Response = ""
If 1=request.%IsA("EnsLib.HTTP.GenericMessage") {
If (context.StatusLine = "") {
Set context.StatusLine = "HTTP/1.1 200 OK"
}
If (##class(%File).Exists(context.Outputfile)) {
Set tStream = ##class(%Stream.FileBinary).%New()
Set tSC = tStream.LinkToFile(context.Outputfile)
If $$$ISERR(tSC) Do ##class(Oliver.Util).DebugStatus(tSC)
}
//Set tSC = tmp.%Save()
Set context.Response=##class(EnsLib.HTTP.GenericMessage).%New($Get(tStream),,request.HTTPHeaders)
Do context.Response.HTTPHeaders.SetAt("application/pdf","Content-Type")
Do context.Response.HTTPHeaders.SetAt(context.StatusLine,"StatusLine")
Set tSC = context.Response.%Save()
}
Maybe I have not installed enough for pandoc to work properly in my container. Are there other tools for programmatically creating pdf (from html)?
I realize that my HTML contains references to css files. I do not yet have the css files where pandoc is running.