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require 'jsonpath'
require 'cgi'
module Utils
def self.unindent(s)
s = s.gsub(/\t/, ' ').chomp
min = ((s.split("\n").find {|l| l !~ /^\s*$/ })[/^\s+/, 0] || "").length
if min > 0
s.gsub(/^#{" " * min}/, "")
else
s
end
end
def self.pretty_print(struct, indent = true)
output = JSON.pretty_generate(struct)
if indent
output.gsub(/\n/i, "\n ").tap { |a| p a }
else
output
end
end
def self.interpolate_jsonpaths(value, data)
value.gsub(/<[^>]+>/).each { |jsonpath|
Utils.values_at(data, jsonpath[1..-2]).first.to_s
}
end
def self.recursively_interpolate_jsonpaths(struct, data)
case struct
when Hash
struct.inject({}) {|memo, (key, value)| memo[key] = recursively_interpolate_jsonpaths(value, data); memo }
when Array
struct.map {|elem| recursively_interpolate_jsonpaths(elem, data) }
when String
interpolate_jsonpaths(struct, data)
else
struct
end
end
def self.value_at(data, path)
values_at(data, path).first
end
def self.values_at(data, path)
if path =~ /\Aescape /
path.gsub!(/\Aescape /, '')
escape = true
else
escape = false
end
result = JsonPath.new(path, :allow_eval => ENV['ALLOW_JSONPATH_EVAL'] == "true" || false).on(data.is_a?(String) ? data : data.to_json)
if escape
result.map {|r| CGI::escape r }
else
result
end
end
# Output JSON that is ready for inclusion into HTML. If you simply use to_json on an object, the
# presence of </script> in the valid JSON can break the page and allow XSS attacks.
# Optionally, pass `:skip_safe => true` to not call html_safe on the output.
def self.jsonify(thing, options = {})
json = thing.to_json.gsub('</', '<\/')
if !options[:skip_safe]
json.html_safe
else
json
end
end
def self.pretty_jsonify(thing)
JSON.pretty_generate(thing).gsub('</', '<\/')
end
end