将换行 JSON 拆分为一个数组

Question

我有一个来自 Web 服务器的 JSON，如下所示：

{"timestamp":1642069251.6908009,"station_id":"ORBB","channel":5,"freq":131.725,"level":-28.1,"error":0,"mode":"2","label":"Q0","block_id":"8","ack":false,"tail":"A6-ANR","flight":"G90369","msgno":"S10A"}
{"timestamp":1642069257.00876,"station_id":"ORBB","channel":5,"freq":131.725,"level":-41.3,"error":0,"mode":"2","label":"Q0","block_id":"7","ack":false,"tail":"PH-HXO","flight":"HV6905","msgno":"S28A"}
{"timestamp":1642069259.057013,"station_id":"ORBB","channel":5,"freq":131.725,"level":-24.9,"error":0,"mode":"D","label":"Q0","block_id":"9","ack":false,"tail":"A6-ANR","flight":"G90369","msgno":"S11A"}

l have followed this answer 但我在控制台中没有可显示的内容。

我无法编辑上面的数据 JSON 以提供有效的 JSON，因为它来自使用 Ajax 的数据服务器。

   $(document).ready(() => {
         $.ajax('acarsdec.json', {
        type: 'GET',
        //dataType: "text",
        timeout: 10000,
        cache: false,
        
}).done(function (data, textStatus, jqXHR) {
const dataasfile = `data:text/plain;base64,${btoa(data)}`;

fetch(dataasfile).then(res => res.text()).then(text => {
  let jsonstr = `[${text.split('\n').join(',')}]`;
  let json = JSON.parse(jsonstr);
  console.log(json);
});
    })

    })

Answer 1

作为起点，您展示的这段代码不是有效的 JSON，因此没有理由尝试将其解析为 JSON。

如果您可以相信源是每行一个对象的“伪”JSON，您可以在换行符 (\n) 上拆分文本，然后用逗号 (,) 再次连接字符串，然后将方括号括在字符串：

let jsonstr = `[${text.split('\n').join(',')}]`;

这里我使用 fetch 函数和一个数据 URL 来模拟 AJAX 请求。

/***** start setup for demostration *****/

const data = `{"timestamp":1642069251.6908009,"station_id":"ORBB","channel":5,"freq":131.725,"level":-28.1,"error":0,"mode":"2","label":"Q0","block_id":"8","ack":false,"tail":"A6-ANR","flight":"G90369","msgno":"S10A"}
{"timestamp":1642069257.00876,"station_id":"ORBB","channel":5,"freq":131.725,"level":-41.3,"error":0,"mode":"2","label":"Q0","block_id":"7","ack":false,"tail":"PH-HXO","flight":"HV6905","msgno":"S28A"}
{"timestamp":1642069259.057013,"station_id":"ORBB","channel":5,"freq":131.725,"level":-24.9,"error":0,"mode":"D","label":"Q0","block_id":"9","ack":false,"tail":"A6-ANR","flight":"G90369","msgno":"S11A"}`;

const dataasfile = `data:text/plain;base64,${btoa(data)}`;

/***** end setup for demostration *****/

/* replace dataasfile with your URL to the API */
fetch(dataasfile).then(res => res.text()).then(text => {
  let jsonstr = `[${text.split('\n').join(',')}]`;
  let json = JSON.parse(jsonstr);
  console.log(json);
});

更新

OP 仍然无法从请求中解析字符串。显然字符串末尾还有一个空行。在以下示例中，我在字符串末尾添加了一个空行。然后我过滤数组，只接受数组中不是空字符串的项目。这一行：

let jsonstr = `[${text.split('\n').filter(str => str != '').join(',')}]`;

/***** start setup for demostration *****/

const data = `{"timestamp":1642069251.6908009,"station_id":"ORBB","channel":5,"freq":131.725,"level":-28.1,"error":0,"mode":"2","label":"Q0","block_id":"8","ack":false,"tail":"A6-ANR","flight":"G90369","msgno":"S10A"}
{"timestamp":1642069257.00876,"station_id":"ORBB","channel":5,"freq":131.725,"level":-41.3,"error":0,"mode":"2","label":"Q0","block_id":"7","ack":false,"tail":"PH-HXO","flight":"HV6905","msgno":"S28A"}
{"timestamp":1642069259.057013,"station_id":"ORBB","channel":5,"freq":131.725,"level":-24.9,"error":0,"mode":"D","label":"Q0","block_id":"9","ack":false,"tail":"A6-ANR","flight":"G90369","msgno":"S11A"}
`; // blank line here in the end on purpose!

const dataasfile = `data:text/plain;base64,${btoa(data)}`;

/***** end setup for demostration *****/

/* replace dataasfile with your URL to the API */
fetch(dataasfile).then(res => res.text()).then(text => {
  let jsonstr = `[${text.split('\n').filter(str => str != '').join(',')}]`;
  let json = JSON.parse(jsonstr);
  console.log(json);
});