mirror of
https://github.com/discourse/discourse.git
synced 2024-12-19 16:44:06 +08:00
99 lines
2.6 KiB
Ruby
99 lines
2.6 KiB
Ruby
# frozen_string_literal: true
|
|
class ContentSecurityPolicy
|
|
module Extension
|
|
extend self
|
|
|
|
def site_setting_extension
|
|
{ script_src: SiteSetting.content_security_policy_script_src.split("|") }
|
|
end
|
|
|
|
def plugin_extensions
|
|
[].tap do |extensions|
|
|
Discourse.plugins.each do |plugin|
|
|
extensions.concat(plugin.csp_extensions) if plugin.enabled?
|
|
end
|
|
end
|
|
end
|
|
|
|
THEME_SETTING = "extend_content_security_policy"
|
|
|
|
def theme_extensions(theme_id)
|
|
key = "theme_extensions_#{theme_id}"
|
|
cache.defer_get_set(key) { find_theme_extensions(theme_id) }
|
|
end
|
|
|
|
def clear_theme_extensions_cache!
|
|
cache.clear
|
|
end
|
|
|
|
private
|
|
|
|
def cache
|
|
@cache ||= DistributedCache.new("csp_extensions")
|
|
end
|
|
|
|
def find_theme_extensions(theme_id)
|
|
extensions = []
|
|
theme_ids = Theme.transform_ids(theme_id)
|
|
|
|
Theme
|
|
.where(id: theme_ids)
|
|
.find_each do |theme|
|
|
theme.cached_settings.each do |setting, value|
|
|
extensions << build_theme_extension(value.split("|")) if setting.to_s == THEME_SETTING
|
|
end
|
|
end
|
|
|
|
extensions << build_theme_extension(
|
|
ThemeModifierHelper.new(theme_ids: theme_ids).csp_extensions,
|
|
)
|
|
|
|
html_fields =
|
|
ThemeField.where(
|
|
theme_id: theme_ids,
|
|
target_id: ThemeField.basic_targets.map { |target| Theme.targets[target.to_sym] },
|
|
name: ThemeField.html_fields,
|
|
)
|
|
|
|
auto_script_src_extension = { script_src: [] }
|
|
html_fields.each(&:ensure_baked!)
|
|
doc = html_fields.map(&:value_baked).join("\n")
|
|
|
|
Nokogiri::HTML5
|
|
.fragment(doc)
|
|
.css("script[src]")
|
|
.each do |node|
|
|
src = node["src"]
|
|
uri = URI(src)
|
|
|
|
next if GlobalSetting.cdn_url && src.starts_with?(GlobalSetting.cdn_url) # Ignore CDN urls (theme-javascripts)
|
|
next if uri.host.nil? # Ignore same-domain scripts (theme-javascripts)
|
|
next if uri.path.nil? # Ignore raw hosts
|
|
|
|
uri.query = nil # CSP should not include query part of url
|
|
|
|
uri_string = uri.to_s.sub(%r{\A//}, "") # Protocol-less CSP should not have // at beginning of URL
|
|
|
|
auto_script_src_extension[:script_src] << uri_string
|
|
rescue URI::Error
|
|
# Ignore invalid URI
|
|
end
|
|
|
|
extensions << auto_script_src_extension
|
|
|
|
extensions
|
|
end
|
|
|
|
def build_theme_extension(entries)
|
|
{}.tap do |extension|
|
|
entries.each do |entry|
|
|
directive, source = entry.split(":", 2).map(&:strip)
|
|
|
|
extension[directive] ||= []
|
|
extension[directive] << source
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|