Escaping double quotes in Ruby's gsub

Question

I'm trying to minify some inline JSON as part of my HTML minifier. How do I make this:

>      {"@context": "http://schema.org",        "@type": "WebSite"}      <

Into this:

>{ "@context": "http://schema.org", "@type": "WebSite" }<

I've tried gsub[/\\", \\s+\\"/, ", "] , gsub[/"\\"}"/, "\\" }"] and gsub[/"\\"}"/, "\\" }"] but that errors out.

syntax error, unexpected [, expecting ']' (SyntaxError)
[/"\"}"/, "\" }"]
 ^
syntax error, unexpected ',', expecting keyword_end
syntax error, unexpected ',', expecting keyword_end
syntax error, unexpected ']', expecting keyword_end

UPDATE

I've now also tried these but to no good:

[/>\s+{/, ">{ "]    # >      {     => >{
[/}\s+>/, " }<"]    # }      <     => }<
[%r/{"/, '{ %r/"']  # {"           => { "
[%r/"}/, '%r/" }']  # "}           => " }
[%r/",\s+/, ", "]   # ,        "   => , "

Resulting in:

syntax error, unexpected [, expecting ']' (SyntaxError)
[/}\s+>/, " }<"]    # }      <     => }<
 ^

Answer 1

I would suggest a different approach:

require JSON
str = '{"@context": "http://schema.org",        "@type": "WebSite"}'
new_str = JSON.parse(str).to_json
puts new_str

> {"@context":"http://schema.org","@type":"WebSite"}

Answer 2

Use a %r Regexp literal to escape all characters but one :

a = '{"@context": "http://schema.org",        "@type": "WebSite"}'

a.gsub(%r/{"/, '{ "').gsub(%r/"}/, '" }').gsub(/\s+/, ' ')
#=> { "@context": "http://schema.org", "@type": "WebSite" }

using %r{ ... } escapes all characters but { and } ,same goes for / , ( , etc ...

Answer 3

credit : Escaping '“' with regular double quotes using Ruby regex

It will escapes double quotes

gsub(/("|")/, 34.chr)