discourse/lib/url_helper.rb

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class UrlHelper
def self.is_local(url)
url.present? && (
Discourse.store.has_been_uploaded?(url) ||
!!(url =~ /^\/(assets|plugins|images)\//) ||
url.start_with?(Discourse.asset_host || Discourse.base_url_no_prefix)
)
end
def self.absolute(url, cdn = Discourse.asset_host)
cdn = "https:" << cdn if cdn && cdn =~ /^\/\//
url =~ /^\/[^\/]/ ? (cdn || Discourse.base_url_no_prefix) + url : url
end
def self.absolute_without_cdn(url)
self.absolute(url, nil)
end
def self.schemaless(url)
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url.sub(/^http:/i, "")
end
DOUBLE_ESCAPED_REGEXP ||= /%25([0-9a-f]{2})/i
# Prevents double URL encode
# https://stackoverflow.com/a/37599235
def self.escape_uri(uri, pattern = URI::UNSAFE)
encoded = URI.encode(uri, pattern)
encoded.gsub!(DOUBLE_ESCAPED_REGEXP, '%\1')
encoded
end
end