首页 > 解决方案 > 我想存储使用摩根的网络日志并表达到 json 文件

问题描述

我想存储 JSON 文件,每个都像表单

[
 {
   "remote-addr" : "127.0.0.1",
   "date"  : " 2018.07.28"
 }
] 

我用这个代码

var format=json(
    ':remote-addr:date'
);

app.use(logger({
    format:format,
    stream: fs.createWriteStream('log.json')
}));  

我使用这段代码并得到

{"remote-addr":"::ffff:127.0.0.1","date":"Sat, 28 Jul 2018 04:38:41 GMT"}
{"remote-addr":"::ffff:127.0.0.1","date":"Sat, 28 Jul 2018 04:38:41 GMT"}
{"remote-addr":"::ffff:127.0.0.1","date":"Sat, 28 Jul 2018 04:38:42 GMT"}
{"remote-addr":"::ffff:127.0.0.1","date":"Sat, 28 Jul 2018 04:38:48 GMT"}

这是 json 文件,但没有 [ ] 和 ,

如何获取json文件??

标签: jsonnode.jsexpressmorgan

解决方案


从技术上讲,Morgan 不允许您这样做,因为它的全部目的是为每个请求编写一个标准access.log行(感谢Douglas Wilson指出这一点)。

是的,您可以像以前一样破解单个日志行,这使其成为有效的 JSON 行。但是,为了使您的log.json文件也成为有效的 JSON,我能想到的唯一方法是对文件进行某种后处理。

以下是后处理的样子: 首先,您需要逐行读取文件。然后,创建您的有效 JSON。最后 - 将其保存在一个单独的文件中(或无论如何覆盖 log.json)。

这就是我的做法。输入:您当前的log.json文件:

{"remote-addr":"::ffff:127.0.0.1","date":"Sat, 28 Jul 2018 04:38:41 GMT"}
{"remote-addr":"::ffff:127.0.0.1","date":"Sat, 28 Jul 2018 04:38:41 GMT"}
{"remote-addr":"::ffff:127.0.0.1","date":"Sat, 28 Jul 2018 04:38:42 GMT"}
{"remote-addr":"::ffff:127.0.0.1","date":"Sat, 28 Jul 2018 04:38:48 GMT"}

我写的后处理脚本:

const fs = require('fs');
//  Since Node.js v0.12 and as of Node.js v4.0.0, there is a stable
// readline core module. That's the easiest way to read lines from a file,
// without any external modules. Credits: https://stackoverflow.com/a/32599033/1333836
const readline = require('readline');

const lineReader = readline.createInterface({
    input: fs.createReadStream('log.json')
});

const realJSON = [];
lineReader.on('line', function (line) {
    realJSON.push(JSON.parse(line));
});

lineReader.on('close', function () {
    // final-log.json is the post-processed, valid JSON file
    fs.writeFile('final-log.json', JSON.stringify(realJSON), 'utf8', () => {
        console.log('Done!');
    });
});

结果:该final-log.json文件是一个有效的 JSON(我用jsonlint对其进行了验证,一切都很好)。

[{
    "remote-addr": "::ffff:127.0.0.1",
    "date": "Sat, 28 Jul 2018 04:38:41 GMT"
}, {
    "remote-addr": "::ffff:127.0.0.1",
    "date": "Sat, 28 Jul 2018 04:38:41 GMT"
}, {
    "remote-addr": "::ffff:127.0.0.1",
    "date": "Sat, 28 Jul 2018 04:38:42 GMT"
}, {
    "remote-addr": "::ffff:127.0.0.1",
    "date": "Sat, 28 Jul 2018 04:38:48 GMT"
}]

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