JQ如何从json值打印换行符而不是换行符 [英] JQ how to print newline and not newline character from json value

问题描述

我有一些以JSON输出信息的日志.这是为了收集到Elasticsearch.

I have some logs that output information in JSON. This is for collection to elasticsearch.

一些测试人员和操作人员希望能够读取服务器上的日志.

Some testers and operations people want to be able to read logs on the servers.

以下是一些示例JSON:

Here is some example JSON:

{
"@timestamp": "2015-09-22T10:54:35.449+02:00",
"@version": 1,
"HOSTNAME": "server1.example",
"level": "WARN",
"level_value": 30000,
"logger_name": "server1.example.adapter",
"message": "message"
"stack_trace": "ERROR LALALLA\nERROR INFO NANANAN\nSOME MORE ERROR INFO\nBABABABABABBA BABABABA ABABBABAA BABABABAB\n"
}

以此类推.

是否可以使Jq打印换行符而不是\ n字符?

Is it possible to make Jq print newline instead of the \n char?

推荐答案

最初给出的输入不是完全有效的JSON，并且不清楚所需的输出是什么，但是可能涉及以下内容.它是针对当前版本的jq(1.5版)编写的，但可以轻松地针对jq 1.4进行修改:

The input as originally given isn't quite valid JSON, and it's not clear precisely what the desired output is, but the following might be of interest. It is written for the current version of jq (version 1.5) but could easily be adapted for jq 1.4:

def json2qjson:
  def pp: if type == "string" then "\"\(.)\""  else . end;
  . as $in
  | foreach keys[] as $k (null; null; "\"\($k)\": \($in[$k] | pp)" ) ;


def data: {
  "@timestamp": "2015-09-22T10:54:35.449+02:00",
  "@version": 1,
  "HOSTNAME": "server1.example",
  "level": "WARN",
  "level_value": 30000,
  "logger_name": "server1.example.adapter",
  "message": "message",
  "stack_trace": "ERROR LALALLA\nERROR INFO NANANAN\nSOME MORE ERROR INFO\nBABABABABABBA BABABABA ABABBABAA BABABABAB\n"
};

data | json2qjson

输出:

$ jq -rnf json2qjson.jq
"@timestamp": "2015-09-22T10:54:35.449+02:00"
"@version": 1
"HOSTNAME": "server1.example"
"level": "WARN"
"level_value": 30000
"logger_name": "server1.example.adapter"
"message": "message"
"stack_trace": "ERROR LALALLA
ERROR INFO NANANAN
SOME MORE ERROR INFO
BABABABABABBA BABABABA ABABBABAA BABABABAB
"

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