使用shellscript用config.json中定义的1-n特定值替换html文件中的占位符 [英] replacing a placeholder in a html file with 1-n specific values defined in a config.json using shellscript

问题描述

我需要用config.json文件中定义的1-n个特定值替换html文件index.html中的占位符( __ PLACEHOLDER __ ).

I need to replace a placeholder (__PLACEHOLDER__) in a html file index.html with 1-n specific values defined in a config.json file.

用新内容替换index.html中的占位符: echo"$ {html//__ PLACEHOLDER __/$ replace}">index.html

replacing the placeholder inside index.html with new content: echo "${html//__PLACEHOLDER__/$replace}" > index.html

从json获取值(不起作用): replace = $(sed's/.*"host":"\(.* \)"/\ 1/g; d; t'config.json)这不是一个好方法，目前无法返回所需的值

getting the values from json (not working): replace=$(sed 's/.*"host": "\(.*\)"/\1/g;d;t' config.json) this is not a good approach and currently does not return the desired values

所以我知道如何替换html文件中的值，但是在此之前我不知道如何将我需要的值转换为变量.我已经在sed或perl中使用sed进行过尝试，但是问题是它与跨平台不兼容，这是必须的.

So i know how to replace the value in the html file, but i dont know how to get the values i need into a variable before that. I already tried it with sed or perl, with sed however the issue is its not cross platform compatible which it need to be.

{
    "xxxx": {
        "description": "xxxxx",
        "value": {
            "to": [
                "xxxxxx"
            ]
        }
    },
    "xxxx": {
        "description": "xxx",
        "value": "xxxxxx"
    },
    "API": {
        "description": "xxxxxxxxx",
        "value": {
            "default": {
                "host": "VALUE I WANT"
            },
            "auth": {
                "host": "VALUE I WANT"
            }
        }
    },
}

default和auth仅是一些可能的值，它可能是1-n主机.

default and auth are only some possible values it could be 1-n hosts.

最后，我想要一个以所有主机为字符串的变量:host1 host2 host3

in the end i would like a variable with all the hosts as strings: host1 host2 host3

信息:我们不能使用系统和其他系统通常不提供的任何第三方工具.index.html文件无关紧要，我们只替换占位符的值即可.

感谢您的帮助

推荐答案

我们不能使用系统上通常不存在的任何第三方工具

we cannot use any 3rd party tools which are not usually present on systems

鉴于我们不知道您使用的是什么系统"，这并不是一个非常有用的限制.

Given that we don't know what "systems" you're using, this isn't a very useful restriction to tell us about.

Perl有几个可用的JSON解析器，自Perl 5.14(于2011年5月发布)以来，其中一个(

Perl has several JSON parsers available and since Perl 5.14 (which was released in May 2011) one of them (JSON::PP) has been part of the standard Perl distribution. So if you have a version of Perl that was released in the last nine years, then the task of reading the JSON file into a variable is trivial.

#!/user/bin/perl

use strict;
use warnings;
use feature 'say';

use JSON::PP;
use Data::Dumper;

open my $json_fh, '<', 'config.json' or die $!;

my $json = do { local $/; <$json_fh> };

my $config = JSON::PP->new->decode($json);

# Now you have your JSON in a Perl data structure
say Dumper $config;

# You can also access individual values
say $config->{xxxx}{description};
say $config->{API}{value}{default}{host};

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