Trouble creating a readable/Downloaded DOCX File from Plumber API

[akramh]

I'm currently developing a Plumber API in R that generates and sends back DOCX files. While the API appears to be working correctly, I'm facing an issue when attempting to open the downloaded DOCX file. I would appreciate any insights or suggestions to help resolve this matter.

1. I have a Plumber endpoint that generates a Word document (DOCX) and serves it as a binary response.
2. The generated DOCX file can be downloaded successfully, but there's an issue when attempting to open it. it can't be read even though the rmd script is able to generate a readable report docx. the report could be either docx or zipped. I'm fine with either.

as for my code :
1) plumber.R

#* @param test le deuxieme doc
#* @post /generate_report_word
function(test, res) {
  
  tmp1 <- tempfile(tmpdir = getwd())
  
  output_path <- paste0(getwd(), "/report_test.docx")
  
  rmarkdown::render("report_test.Rmd", output_file = output_path, 
                    params = list(team1 = test))
  

  file_content <- readBin(output_path, "raw", n = file.info(output_path)$size)
  res$setHeader("Content-Type", "application/vnd.openxmlformats-officedocument.wordprocessingml.document")
  res$setHeader("Content-Disposition", sprintf("attachment; filename=%s", "report_test.docx"))
  res$status(200)
  res$body(file_content)
  
}

run_this.R

library(plumber)
library(rmarkdown)

r <- plumb("plumber.R")  
r$run(port=8000)

[meztez]

Rendering Output

Use a serializer content type. If you want to return a file download, use as attachment.

Return an attachment response — as_attachment

There is an automatic content type setting according to extension, you can what docx will be here.

rstudio/plumber/blob/56a69494cf15c3c3ca0831a86a91ba033337206a/R/content-types.R#L41