使用Httpoison查询ElasticSearch

defp deps do
  [
    {:httpoison, "~> 1.8"}
  ]
end

url = "http://elasticsearch.example.com/index/_search"
headers = [{"Content-Type", "application/json"}]
body = %{query: %{match: %{field: "value"}}}

response = HTTPoison.post(url, Poison.encode!(body), headers)

case response do
  {:ok, %{status_code: 200, body: body}} ->
    # 处理成功响应
    IO.puts("查询成功: #{inspect(body)}")
  {:ok, %{status_code: code, body: body}} ->
    # 处理其他响应
    IO.puts("查询失败: #{inspect(code)} - #{inspect(body)}")
  {:error, reason} ->
    # 处理请求错误
    IO.puts("请求错误: #{inspect(reason)}")
end