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我正在尝试使用 Elixir / HTTPoison 从凸轮获取流并将其转储到文件中。网址为xxxx/axis-cgi/mjpg/video.cgi?duration=1&resolution=320x240

使用 DHC（Chrome 插件）中的 url，我可以拥有以下内容：

响应 200 OK

HEADERS Cache-Control: no-cache Pragma: no-cache Expires: Thu, 01 Dec 1994 16:00:00 GMT Connection: close Content-Type: multipart/x-mixed-replace; 边界=myboundary X-Time-Offset: 62044.312573 pretty COMPLETE REQUEST HEADERS Accept: / Accept-Encoding: gzip, deflate, sdch Accept-Language: fr-FR,fr;q=0.8,en-US;q=0.6,en; q=0.4 Content-Type: application/xml User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36 注意：XHR 会自动添加像 Accept, Accept-Language、Cookie、User-Agent 等

原始格式的正文向我展示了很多由--myboundary分隔的二进制 jpeg 图像。

--myboundary

内容类型：图片/jpeg

内容长度：11848

����JFIF�� W�u]7W�u]7�� �2�̎TY"��C

现在，我想尝试用 Elixir 获得同样的效果。

  test "request headers from cam" do
    options = [hackney: [basic_auth: {"login","password"}]]
    {:ok, %HTTPoison.AsyncResponse{id: id}} = HTTPoison.get "http://x.x.x.x/axis-cgi/mjpg/video.cgi?duration=1&resolution=320x240",[], [stream_to: self, recv_timeout: :infinity, hackney: options]
    assert_receive %HTTPoison.AsyncStatus{id: ^id, code: 200}, 1_000
  end

我确实有以下回应，

  1) test request headers from cam (NewsequenceTest)
     test/newsequence_test.exs:9
     No message matching %HTTPoison.AsyncStatus{id: ^id, code: 200} after 1000ms.
     The following variables were pinned:
       id = #Reference<0.0.3.125>
     Process mailbox:
       %HTTPoison.AsyncStatus{code: 401, id: #Reference<0.0.3.125>}
       %HTTPoison.AsyncHeaders{headers: [{"Date", "Wed, 31 Aug 2016 06:47:00 GMT"}, {"Accept-Ranges", "bytes"}, {"Connection", "close"}, {"WWW-Authenticate", "Digest realm=\"AXIS_ACCC8E545922\", nonce=\"0000fa64Y50235919055a42f91d3dea744b10d2dab9653\", stale=FALSE, qop=\"auth\""}, {"WWW-Authenticate", "Basic realm=\"AXIS_ACCC8E545922\""}, {"Content-Length", "189"}, {"Content-Type", "text/html; charset=ISO-8859-1"}], id: #Reference<0.0.3.125>}
       %HTTPoison.AsyncChunk{chunk: "<HTML><HEAD><TITLE>401 Unauthorized</TITLE></HEAD>\n<BODY><H1>401 Unauthorized</H1>\nYour client does not have permission to get URL /axis-cgi/mjpg/video.cgi from this server.\n</BODY></HTML>\n", id: #Reference<0.0.3.125>}
       %HTTPoison.AsyncEnd{id: #Reference<0.0.3.125>}
     stacktrace:
       test/newsequence_test.exs:12: (test)

我确实尝试过没有基本身份验证，但结果相同。

我还不明白这个身份验证错误发生了什么。当然我误解了一些东西，有人可以请教我这个问题吗？

亲切的问候，

皮埃尔

4

1 回答 1

1

所以这里的问题是代码正在调用：

HTTPoison.get(..., [], [..., hackney: [hackney: [basic_auth: {"login","password"}]]])

代替：

HTTPoison.get(..., [], [..., hackney: [basic_auth: {"login","password"}]])

这导致hackney忽略它们，因为它试图获取opts[:hackney][:basic_auth]所有nil.

解决方法是替换：

options = [hackney: [basic_auth: {"login","password"}]]

和

options = [basic_auth: {"login","password"}]
于 2016-09-01T08:40:16.330 回答