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

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。我究竟做错了什么？

PS：它适用于 js http 客户端（axios.js），不知道为什么它不适用于 httpoison

Answer 1

该 URL 以 gzip 格式返回正文，并通过发送 header 来表明这一点Content-Encoding: gzip。hackney, 库 HTTPoison 建立在，不会自动解码。此功能可能会在某个时候添加。在那之前，您可以使用:zlib模块自己解码身体，如果Content-Encoding是gzip：

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