HTTPoison 跟随重定向

Question

有一个 public API 在浏览器中完美运行，returns JSON 响应但是使用最新版本的 Httpoision 它没有按预期工作:

HTTP（获取）：https://yts.lt/api/v2/list_movies.json?query_term=tt11296058

 {:ok,
 %HTTPoison.Response{
   body: "",
   headers: [
     {"Date", "Tue, 22 Jun 2021 11:42:20 GMT"},
     {"Transfer-Encoding", "chunked"},
     {"Connection", "keep-alive"},
     {"Cache-Control", "max-age=3600"},
     {"Expires", "Tue, 22 Jun 2021 12:42:20 GMT"},
     {"Location",
      "https://yts.mx/api/v2/list_movies.json?query_term=tt11296058"},
     {"cf-request-id", "0ad5205cb800004da508b04000000001"},
     {"Expect-CT",
      "max-age=604800, report-uri=\"https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct\""},
     {"Report-To",
      "{\"endpoints\":[{\"url\":\"https:\/\/a.nel.cloudflare.com\/report\/v2?s=O80%2B5KfZ6d3G3Fz0NBGlep%2BetzQAvaUDIvVW09DUB2QMtJpd1XxupK621LhGR8EqiOsOY%2B55BdaHAljyLCEumHyb0rHSqk526jMQ5NxuLUi%2FVdbX\"}],\"group\":\"cf-nel\",\"max_age\":604800}"},
     {"NEL", "{\"report_to\":\"cf-nel\",\"max_age\":604800}"},
     {"Server", "cloudflare"},
     {"CF-RAY", "663536745c654da5-BOM"},
     {"alt-svc",
      "h3-27=\":443\"; ma=86400, h3-28=\":443\"; ma=86400, h3-29=\":443\"; ma=86400, h3=\":443\"; ma=86400"}
   ],
   request: %HTTPoison.Request{
     body: "",
     headers: [],
     method: :get,
     options: [],
     params: %{},
     url: "https://yts.lt/api/v2/list_movies.json?query_term=tt11296058"
   },
   request_url: "https://yts.lt/api/v2/list_movies.json?query_term=tt11296058",
   status_code: 301
 }}

还要指出 status_code 来自响应 301。 301 是针对永久删除的资源，但这里似乎不是这种情况。

项目依赖项：

Elixir: 1.12.1
OTP: 24
{:httpoison, "~> 1.8"},
{:floki, "~> 0.20.4"},
{:poison, "~> 3.1"},
{:hackney, github: "benoitc/hackney", override: true},

Answer 1

301 is for a resource that is permanently removed

绝对不是。这是 redirection（“永久移动”的代码。）

浏览器显然会自行处理重定向，代码必须自行处理。收到 301 后，您的代码应在指定位置重复请求。在您提供的回复中，回复中没有指定位置，这很奇怪，但那是另一个问题。

HTTPoison 可以是 instructed to handle redirects，不过。

Answer 2

您需要传递 follow_redirect 选项：

HTTPoison.get(url, [], follow_redirect: true)

示例：

iex(1)> Mix.install [:httpoison]
:ok
iex(2)> url = "https://yts.lt/api/v2/list_movies.json?query_term=tt11296058"
"https://yts.lt/api/v2/list_movies.json?query_term=tt11296058"
iex(3)> HTTPoison.get(url, [], follow_redirect: true)
{:ok,
 %HTTPoison.Response{
   body: "{\"status\":\"ok\",\"status_message\":\"Query was successful\",\"data\":
...

HTTPoison 跟随重定向

HTTPoison follow redirects

redirect

elixir

httpoison