可以使用URL强制下载吗？文件不在我的Rails中

Question

我正在尝试创建播客页面。

我有mp3文件URL https://mcdn.podbean.com/mf/web/tcips9/Introverted.mp3

我想要有一个链接到mp3文件网址的下载按钮，所以当我点击它时，我想下载，而不是打开一个新的web浏览器并播放。

= link_to "Download", @podcast.episode_audio_url, download: "{@podcast.episode_audio_url}"

我尝试了上面的代码，它打开了一个新的web浏览器并播放。

我如何实现我的目标？请帮帮我。

我的控制器

    class PodcastsController < ApplicationController
  before_action :set_podcast, only: [:show, :edit, :update, :destroy]

  # GET /podcasts
  # GET /podcasts.json
  def index
    @podcasts = Podcast.all
  end

  # GET /podcasts/1
  # GET /podcasts/1.json
  def show
  end

  # GET /podcasts/new
  def new
    @podcast = Podcast.new
  end

  # GET /podcasts/1/edit
  def edit
  end

  # POST /podcasts
  # POST /podcasts.json
  def create
    @podcast = Podcast.new(podcast_params)

    respond_to do |format|
      if @podcast.save
        format.html { redirect_to @podcast, notice: 'Podcast was successfully created.' }
        format.json { render :show, status: :created, location: @podcast }
      else
        format.html { render :new }
        format.json { render json: @podcast.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /podcasts/1
  # PATCH/PUT /podcasts/1.json
  def update
    respond_to do |format|
      if @podcast.update(podcast_params)
        format.html { redirect_to @podcast, notice: 'Podcast was successfully updated.' }
        format.json { render :show, status: :ok, location: @podcast }
      else
        format.html { render :edit }
        format.json { render json: @podcast.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /podcasts/1
  # DELETE /podcasts/1.json
  def destroy
    @podcast.destroy
    respond_to do |format|
      format.html { redirect_to podcasts_url, notice: 'Podcast was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_podcast
      @podcast = Podcast.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def podcast_params
      params.require(:podcast).permit(:episode_url, :episode_title, :episode_description, :episode_audio_url, :episode_number)
    end
end

提前谢谢你。

Answer 1

我建议你在应用程序控制器中编写下载逻辑。所以在你的路线中你会有

get download_podcast, to: "downloads#podcast"

你的控制器应该是

class DownloadsController
  def podcast
    send_file Podcast.find(params[:podcast_id]).episode_audio_url, type: "audio/mp3"
  end
end

，并且您的视图将链接到此操作

link_to "Download", download_podcast_path(podcast_id: @podcast.id), target: "_blank"