快速获取远程图像尺寸的方法

发布于 2024-11-05 22:02:33 字数 717 浏览 0 评论 0原文

我使用 imagesize gem 来检查远程图像的大小，然后仅将足够大的图像推送到数组中。

require 'open-uri'
require 'image_size'
data = Nokogiri::HTML(open(url))
images = []
forcenocache = Time.now.to_i # No cache because jquery load event doesn't fire for cached images
data.css("img").each do |image|
  image_path = URI.join(site, URI.encode(image[:src]))
  open(image_path, "rb") do |fh|
    image_size = ImageSize.new(fh.read).get_size()
    unless image_size[0] < 200 || image_size[1] < 100
      image_element = "<img src=\"#{image_path}?#{forcenocache}\">"
      images.push(image_element)
    end
  end
end

我尝试在前端使用 JS 来检查图像尺寸，但浏览器似乎对一次可以加载的图像数量有限制。

使用 imagesize 比使用 JS 慢得多。有更好更快的方法来做到这一点吗？

原文

I'm using the imagesize gem to check the sizes of remote images and then only push images that are big enough into an array.

require 'open-uri'
require 'image_size'
data = Nokogiri::HTML(open(url))
images = []
forcenocache = Time.now.to_i # No cache because jquery load event doesn't fire for cached images
data.css("img").each do |image|
  image_path = URI.join(site, URI.encode(image[:src]))
  open(image_path, "rb") do |fh|
    image_size = ImageSize.new(fh.read).get_size()
    unless image_size[0] < 200 || image_size[1] < 100
      image_element = "<img src=\"#{image_path}?#{forcenocache}\">"
      images.push(image_element)
    end
  end
end

I tried using JS on the front-end to check image dimensions but there seems to be a browser limit to how many images can be loaded at once.

Doing it with imagesize is much slower than using JS. Any better and faster ways to do this?

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