通过某些特殊字符或字符序列拆分来解析 JSON 输出

Question

一些日志库将 JSON 字符串写入文件，然后对其进行解析。 我正在编写一个用于集成测试的库，并且想知道拆分 JSON 字符串的最佳方法是什么，以便我可以创建一个字符串数组，然后一次解析它们。

这将是这样完成的：

var path = require('path');
var filePath = path.resolve(appRootPath + '/' + 'test/output/test1.txt');
var rstream = fs.createReadStream(filePath);

var data = '';

rstream
    .on('data', function (chunk) {
        data += chunk;
    })
    .on('end', function () {  // done
        var array = String(dataLength).split(';'); //spit the big string into an array of strings by some token

        doTheThing(array.filter(function (item) {   //filter and parse the array element by element
            return item && item.length > 0;
        }).map(function (item) {
            return JSON.parse(String(item));
        }));

    });

下面，我只是用分号作为描述字符，但是由于显而易见的原因，这还不够好。

所以我希望解析下面这个大字符串（请原谅“狗”和“猫”之类的无意义词）：

{"testId":21,"desc":"cats 1"};{"testId":18,"desc":"dogs 1"};{"testId":1,"desc":"makes stuff 1","error":{}};{"testId":22,"desc":"cats 2"};{"testId":19,"desc":"dogs 2"};{"testId":2,"desc":"makes stuff 2","error":{}};{"testId":20,"tests":[{"testId":21,"type":"it-standard","desc":"cats 1","complete":false,"error":null},{"testId":22,"type":"it-standard","desc":"cats 2","complete":false,"error":null}],"testsParallel":[],"loopTests":[],"children":[],"error":null};{"testId":17,"tests":[{"testId":18,"type":"it-standard","desc":"dogs 1","complete":false,"error":null},{"testId":19,"type":"it-standard","desc":"dogs 2","complete":false,"error":null}],"testsParallel":[],"loopTests":[],"children":[{"testId":20}],"error":null};{"testId":3,"desc":"makes stuff 2","error":null};{"testId":4,"desc":"makes stuff 2","error":{}};{"testId":10,"desc":"makes stuff 1","error":{}};{"testId":11,"desc":"makes stuff 2","error":null};{"testId":12,"desc":"makes stuff 3","error":{}};{"testId":14,"desc":"makes stuff 44","error":{}};{"testId":15,"desc":"makes stuff 888","error":{}};{"testId":16,"desc":"makes stuff 999","error":{}};{"testId":6,"desc":"makes stuff chard","error":{}};{"testId":7,"desc":"makes stuff heeee","error":{}};{"testId":8,"desc":"makes stuff raaa","error":{}};{"testId":0,"tests":[{"testId":1,"type":"it-standard","desc":"makes stuff 1","complete":false,"error":null},{"testId":2,"type":"it-standard","desc":"makes stuff 2","complete":false,"error":null},{"testId":3,"type":"it-standard","desc":"makes stuff 2","complete":false,"error":null},{"testId":4,"type":"it-standard","desc":"makes stuff 2","complete":false,"error":null}],"testsParallel":[{"testId":9,"tests":[{"testId":10,"type":"it-parallel","desc":"makes stuff 1","complete":false,"error":null},{"testId":11,"type":"it-parallel","desc":"makes stuff 2","complete":false,"error":null},{"testId":12,"type":"it-parallel","desc":"makes stuff 3","complete":false,"error":null}],"type":"ParallelTestSet"},{"testId":13,"tests":[{"testId":14,"type":"it-parallel","desc":"makes stuff 44","complete":false,"error":null},{"testId":15,"type":"it-parallel","desc":"makes stuff 888","complete":false,"error":null},{"testId":16,"type":"it-parallel","desc":"makes stuff 999","complete":false,"error":null}],"type":"ParallelTestSet"}],"loopTests":[{"testId":5,"tests":[{"testId":6,"type":"it-loop","desc":"makes stuff chard","complete":false,"error":null},{"testId":7,"type":"it-loop","desc":"makes stuff heeee","complete":false,"error":null},{"testId":8,"type":"it-loop","desc":"makes stuff raaa","complete":false,"error":null}],"type":"LoopTestSet"}],"children":[{"testId":17}],"error":null};

我需要一种聪明的方法来用一些永远不会出现在输出中的特殊字符来描述可能的 JS 对象（我 可以 控制输出中的最终结果，但这可能需要我过滤最终存储在磁盘上的最终用户数据）。

这是怎么做到的？我可以使用一些超级特殊字符或字符序列吗？还是有一种我没有想到的“更聪明”的方法？

Answer 1

使用 JSON.parse() 可以从字符串中创建对象。 也许可以这样尝试：

• 将 JSON 文件读取为字符串

• 将字符串拆分成数组：string.split(';');

• 现在使用 JSON.parse 在循环中解析所有数组条目

或者只是在 JSON 文件中创建一个数组并解析这个完整的东西