Generating XLSX file

Phoenix Forum Questions / Help
1

I’m trying to dynamically generate a XLSX file, using elixlsx and I’m doing it, but the file generated doesn’t have any file extension, i.e. I just download a file called download and I’d like to download download.xlsx. Can someone help me. please?

My current relevant code is:

config/config.exs

# Configures xlsx mime type
config :mime, :types, %{
  "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" => ["xlsx"]
 }

web/router.ex

defmodule Backoffice.Router do
  use Backoffice.Web, :router

  pipeline :browser do
    plug :accepts, ["html", "xlsx"]
    plug :fetch_session
    plug :fetch_flash
    plug :protect_from_forgery
    plug :put_secure_browser_headers
  end

  pipeline :api do
    plug :accepts, ["json"]
  end

  scope "/", Backoffice do
    pipe_through :browser # Use the default browser stack

    get "/",         PageController, :index  
    get "/download_form", PageController, :download_form 
    get "/download",   PageController, :download
  end
end

web/controllers/page_controller.ex

defmodule Backoffice.PageController do
  use Backoffice.Web, :controller

  def index(conn, _params) do
    render conn, "index.html"
  end

  # render download form
  def download_form(conn, _params) do
    render conn, "download_form.html"
  end

  # generates XLSX
  def download(conn, _params) do
    render conn, "download.xlsx"
  end
end

web/views/page_view.ex

defmodule Backoffice.PageView do
  use Backoffice.Web, :view

  import Elixlsx
  alias Elixlsx.Workbook
  alias Elixlsx.Sheet

  def render("download.xlsx", _params) do #, %{tweets: tweets}) do
    Workbook.append_sheet(%Workbook{}, Sheet.with_name("Sheet 1")
    |> Sheet.set_cell("A1", "Hello", bold: true))
    |> Elixlsx.write_to_memory("download.xlsx") |> elem(1)  |> elem(1)
  end
end
1 Like
2

I’m not seeing where you set the name there? By default the name will be the last part of the path of the url (‘download’ in your case) but you are not setting it to “download.xlsx” anywhere. The line render conn, "download.xlsx" is just calling a render template of “download.xlsx”, not setting a name for note.

To set a name just do normal http stuff. :slight_smile:

The recommended usual way that should work in every situation is to just set a header with a key of “content-disposition” and a value of “attachment; filename=“download.xlsx””, which you could do via (for example):

  # generates XLSX
  def download(conn, _params) do
    conn
    |> put_resp_header("content-disposition", "attachment; filename=\"download.xlsx\"")
    |> render("download.xlsx")
  end

I think I have that right. :slight_smile:

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3

Thanks, man!

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4

I create a little post about how to export data to XLSX report in you Phoenix application https://medium.com/@SergeyChechaev/elixir-phoenix-everyday-tips-create-xlsx-66cd70268eb4#.bbegm57hq

3 Likes