HTTPOISON-在Elixir中插入主体参数

我正在尝试发出http请求

def getPage() do
    url = "http://myurl"
    body = '{
              "call": "MyCall",
              "app_key": "3347249693",
              "param": [
                  {
                      "page"          : 1,
                      "registres"     : 100,
                      "filter"        : "N"
                  }
              ]
             }'

    headers = [{"Content-type", "application/json"}]
    HTTPoison.post(url, body, headers, [])
end

这对我很好。

我的问题是-如何在正文请求中插入变量。
意义:

 def getPage(key, page, registers, filter) do
    url = "http://myurl"
    body = '{
              "call": "MyCall",
              "app_key": key,
              "param": [
                  {
                      "page"          : page,
                      "registres"     : registers,
                      "filter"        : filter
                  }
              ]
             }'

    headers = [{"Content-type", "application/json"}]
    HTTPoison.post(url, body, headers, [])
end

当我运行它时，我得到

%HTTPoison.Response{body: "\nFatal error: Uncaught exception 'Exception' with message 'Invalid JSON object' in /myurl/www/myurl_app/api/lib/php-wsdl/class.phpwsdl.servers.php:...

有什么建议么？

最佳答案

您确实应该为此使用Poison这样的JSON编码器。

url = "http://myurl"
body = Poison.encode!(%{
  "call": "MyCall",
  "app_key": key,
  "param": [
    %{
      "page": page,
      "registres": registers,
      "filter": filter
    }
  ]
})
headers = [{"Content-type", "application/json"}]
HTTPoison.post(url, body, headers, [])

关于HTTPOISON-在Elixir中插入主体参数，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/37385314/