utf-8 - httpoison - 响应正文显示乱码文本而不是 html

Question

如果我尝试:

url = "https://www.economist.com/news/finance-and-economics/21727073-economists-struggle-work-out-how-much-free-economy-comes-cost"    
{:ok, %HTTPoison.Response{status_code: 200, body: body}} = HTTPoison.get(url)
IO.binwrite body

我在控制台中看到乱码文本(而不是 html)。但是如果我在网页上查看源代码，我会在那里看到 html。我做错了什么？

PS:它与 js http 客户端(axios.js)一起工作正常，不知道为什么它不能与 httpoison 一起工作

Answer 1

该 URL 以 gzip 形式返回正文，并通过发送 header Content-Encoding: gzip 来指示这一点。 hackney(HTTPoison 所基于的库)不会自动对其进行解码。此功能will likely be added at some point 。在此之前，如果 Content-Encoding 为 gzip，您可以使用 :zlib 模块自行解码正文:

url = "https://www.economist.com/news/finance-and-economics/21727073-economists-struggle-work-out-how-much-free-economy-comes-cost"

{:ok, %HTTPoison.Response{status_code: 200, headers: headers, body: body}} = HTTPoison.get(url)

gzip? = Enum.any?(headers, fn {name, value} ->
  # Headers are case-insensitive so we compare their lower case form.
  :hackney_bstr.to_lower(name) == "content-encoding" &&
    :hackney_bstr.to_lower(value) == "gzip"
end)

body = if gzip?, do: :zlib.gunzip(body), else: body

IO.write body