jessieh/simple-shortener
jessieh/simple-shortener
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Delete unused Fennel module

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Jessie Hildebrandt 2021-12-21 00:49:43 -05:00
parent 640384fec5
commit 683ebeea9e
1 changed files with 0 additions and 99 deletions
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src/modules/load_config.fnl
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@ -1,99 +0,0 @@
;; modules/load_config.fnl
;; Loads, validates, and provides the configuration values in 'config.fnl'
;; -------------------------------------------------------------------------- ;;
;; Load user configuration file
(var config nil)
(let [(ok err) (pcall #(set config (require :config)))]
(when (not ok)
(print "Stopping server: Missing or invalid config file. See `config.fnl.example` for an example config file.")
(print err)
(os.exit)))
;; -------------------------------------------------------------------------- ;;
;; Expected configuration structure
(local expected_config_structure {:auth_secret {:type "string"
:default "example auth secret"
:not_default true}
:landing_page_index {:type "string"
:default "index.html"}
:listen_port {:type "number"
:default 80}
:provide_api? {:type "boolean"
:default true}
:provide_control_panel? {:type "boolean"
:default true
:depends_on {:provide_api? true}}
:provide_landing_page? {:type "boolean"
:default true}
:query_limit {:type "number"
:default 100}
:session_max_length_hours {:type "number"
:default 24}
:session_max_idle_length_hours {:type "number"
:default 1}
:use_secure_cookies? {:type "boolean"
:default false}
:use_totp? {:type "boolean"
:default false}})
;; -------------------------------------------------------------------------- ;;
;; Sanity checks
;; ---------------------------------- ;;
;; Ensure that the configured values are of the appropriate types
;; (This also checks for missing values: they will be reported as being of type "nil")
(fn assert_config_value_type [key type_str]
"Assert that the value at `key` in the config file is of type `type_str`."
(when (not (= (type (. config key)) type_str))
(print "Stopping server: Invalid value type in your config file.")
(print " - Key name: " key)
(print " - Expected type: " type_str)
(print " - Actual type: " (type (. config key)))
(os.exit)))
(each [setting_key setting_properties (pairs expected_config_structure)]
(when (?. setting_properties :type)
(assert_config_value_type setting_key setting_properties.type)))
;; ---------------------------------- ;;
;; Ensure that the configured values have their dependencies satisfied
(fn assert_config_value_dependencies_satisfied [key dependencies]
"Assert that the value at `key` in the config file has its dependencies `dependencies` satisfied.
`dependencies` is a table of config file keys and their respective expected values."
(each [dependency_key dependency_value (pairs dependencies)]
(when (not (= (. config dependency_key) dependency_value))
(print "Stopping server: Invalid configuration in your config file.")
(print " - Key name: " key)
(print " - Depends on: " dependency_key dependency_value)
(print " - Your config: " dependency_key (. config dependency_key))
(os.exit))))
(each [setting_key setting_properties (pairs expected_config_structure)]
(when (?. setting_properties :depends_on)
(assert_config_value_dependencies_satisfied setting_key setting_properties.depends_on)))
;; ---------------------------------- ;;
;; Ensure that defaults aren't used for security-critical settings
(fn assert_config_value_not_default [key default]
"Assert that the value at `key` in the config file has been changed from its default value of `default`."
(when (= (. config key) default)
(print "Stopping server: Do not use the default values for security-critical settings in your config file!")
(print " - Key name: " key )
(print " - Default value: " default)
(print " - Found value: " (. config key))
(os.exit)))
(each [setting_key setting_properties (pairs expected_config_structure)]
(when (?. setting_properties :not_default)
(assert_config_value_not_default setting_key setting_properties.not_default)))
;; -------------------------------------------------------------------------- ;;
;; Return loaded config
config