Embedly.oembed不依附于最大宽度参数

Question

我试图使用爱默生为给定的url生成一个缩略图。我需要缩略图小于最大大小，所以我按如下方式调用api：

url = "http://embed.ly"
embedly_api = Embedly::API.new(key: ENV['EMBEDLY_KEY'])
obj = embedly_api.oembed(url: url, maxwidth: 50, type: 'photo').first

json_obj = JSON.pretty_generate(obj.marshal_dump)

或

http://api.embed.ly/1/oembed?key=[KEY_VALUE]&url=http://embed.ly&maxwidth=50&type=photo

无论是哪种情况，结果都是：

{
  provider_url: "http://embed.ly",
  description: "Embedly delivers the ultra-fast,...",
  title: "Embedly makes your content more engaging and easier...",
  mean_alpha: 32.7480314961,
  thumbnail_width: 399,
  url: "http://embed.ly",
  thumbnail_url: "http://embed.ly/static/images/logos/logo_color.png?v=4b245",
  version: "1.0",
  provider_name: "Embedly",
  type: "link",
  thumbnail_height: 127
}

注意，thumbnail_width是399 (这比我传入的maxwidth参数要大)。我是不是漏掉了什么明显的东西？

Answer 1

maxwidth只适用于html，图像可以任意宽度。

但是，Embedly允许您设置一个image_width。尝试：

embedly_api.oembed(url: url, maxwidth: 50, type: 'photo', image_width: 50)

http://embed.ly/docs/api/display/integration