从字符串解析对象时出现意外令牌和JSON

Question

我试图使用Poison.encode！（）解析从转换为JSON的长生不老药地图中的数据，无论如何我都出错了：

Unexpected token & in JSON at position 1

如何在此字符串内转义双引号，以防止添加“＆quot;”？

初始数据：

%{"node_10_10@172.17.0.11" => ["40000000-5fffffff", "a0000000-bfffffff"],
  "node_1_10@172.17.0.2" => ["20000000-3fffffff", "a0000000-bfffffff"],
  "node_2_10@172.17.0.3" => ["20000000-3fffffff", "80000000-9fffffff"],
  "node_3_10@172.17.0.4" => ["20000000-3fffffff", "80000000-9fffffff",
   "e0000000-ffffffff"],
  "node_4_10@172.17.0.5" => ["00000000-1fffffff", "80000000-9fffffff",
   "e0000000-ffffffff"],
  "node_5_10@172.17.0.6" => ["00000000-1fffffff", "60000000-7fffffff",
   "e0000000-ffffffff"],
  "node_6_10@172.17.0.7" => ["00000000-1fffffff", "60000000-7fffffff",
   "c0000000-dfffffff"],
  "node_7_10@172.17.0.8" => ["60000000-7fffffff", "c0000000-dfffffff"],
  "node_8_10@172.17.0.9" => ["40000000-5fffffff", "c0000000-dfffffff"],
  "node_9_10@172.17.0.10" => ["40000000-5fffffff", "a0000000-bfffffff"]}

使用控制器内部的此方法映射到新结构：

defp map_shards(nodes, :nodes), do: %{"nodes": Enum.map(nodes, fn{k, v} -> %{"node": k, "shards": v} end)}    

调用内部索引动作：

nodes = map_shards(resp["by_node"], :nodes)

现在我有这样的地图：

%{nodes: [%{node: "node_10_10@172.17.0.11", shards: ["40000000-5fffffff", "a0000000-bfffffff"]}, %{node: "node_1_10@172.17.0.2", shards: ["20000000-3fffffff", "a0000000-bfffffff"]}, %{node: "node_2_10@172.17.0.3", shards: ["20000000-3fffffff", "80000000-9fffffff"]}, %{node: "node_3_10@172.17.0.4", shards: ["20000000-3fffffff", "80000000-9fffffff", "e0000000-ffffffff"]}, %{node: "node_4_10@172.17.0.5", shards: ["00000000-1fffffff", "80000000-9fffffff", "e0000000-ffffffff"]}, %{node: "node_5_10@172.17.0.6", shards: ["00000000-1fffffff", "60000000-7fffffff", "e0000000-ffffffff"]}, %{node: "node_6_10@172.17.0.7", shards: ["00000000-1fffffff", "60000000-7fffffff", "c0000000-dfffffff"]}, %{node: "node_7_10@172.17.0.8", shards: ["60000000-7fffffff", "c0000000-dfffffff"]}, %{node: "node_8_10@172.17.0.9", shards: ["40000000-5fffffff", "c0000000-dfffffff"]}, %{node: "node_9_10@172.17.0.10", shards: ["40000000-5fffffff", "a0000000-bfffffff"]}]}

JS代码，在模板.eex中具有解析器调用：

var theData = ("<%= Poison.Encoder.encode(@nodes, []) %>");
theData = JSON.parse(theData);

我在JS控制台中看到的内容：

var theData = ("{"nodes":[{"shards":["40000000-5fffffff","a0000000-bfffffff"],"node":"node_10_10@172.17.0.11"},{"shards":["20000000-3fffffff","a0000000-bfffffff"],"node":"node_1_10@172.17.0.2"},{"shards":["20000000-3fffffff","80000000-9fffffff"],"node":"node_2_10@172.17.0.3"},{"shards":["20000000-3fffffff","80000000-9fffffff","e0000000-ffffffff"],"node":"node_3_10@172.17.0.4"},{"shards":["00000000-1fffffff","80000000-9fffffff","e0000000-ffffffff"],"node":"node_4_10@172.17.0.5"},{"shards":["00000000-1fffffff","60000000-7fffffff","e0000000-ffffffff"],"node":"node_5_10@172.17.0.6"},{"shards":["00000000-1fffffff","60000000-7fffffff","c0000000-dfffffff"],"node":"node_6_10@172.17.0.7"},{"shards":["60000000-7fffffff","c0000000-dfffffff"],"node":"node_7_10@172.17.0.8"},{"shards":["40000000-5fffffff","c0000000-dfffffff"],"node":"node_8_10@172.17.0.9"},{"shards":["40000000-5fffffff","a0000000-bfffffff"],"node":"node_9_10@172.17.0.10"}]}");

theData = JSON.parse（theData）;

Answer 1

当注入这样的编码JSON时，您需要禁用自动HTML转义。 您也不需要周围的"或方括号。

var theData = <%= raw Poison.Encoder.encode(@nodes, []) %>;

不再需要调用JSON.parse ， theData将被设置为值本身，而不是包含JSON的字符串。