Rails 如何 zip 网络文档，并且 save 到 computer
def index
@downloads = get_all_downloads
end
def get_all_downloads
return SfDownload.where(is_active: true)
end
def download
require 'zip'
require 'open-uri'
if get_all_downloads
zipfile_name = "SfDocuments.zip"
Zip::File.open(zipfile_name, Zip::File::CREATE) do |zipfile|
get_all_downloads.each do |sfd|
# Two arguments:
# - The name of the file as it will appear in the archive
# - The original file, including the path to find it
zipfile.add(File.basename(sfd.sf_url), open(sfd.sf_url))
end
end
end
end
SfDownload 中保存了网络 url, 我想做个页面，将选中的 Url 打包，然后点击下载按钮保存到电脑里，如何实现呢？
下面只是思路。
require 'zip'
require 'open-uri'
def download
# 从网页端发回选中的url集合
selected_url = params[:selected_url]
zipfile_name = "SfDocuments.zip"
Zip::File.open(zipfile_name, Zip::File::CREATE) do |zipfile|
selected_url.each do |url|
# 大文件可能需要curl或者wget之类的工具吧。
response = open(url)
file = File.open('file_name', w) # file_name 需要自己设置
file.write response.body
file.close
zipfile.add file # 打包返回网页内容
end
end
end
如果需要下载比较大的内容 比如视频，返回压缩包的时候 用户怕是等不了那么久把。