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Developer Documentation
- Bug fixes for general core bugs in 3.10.x will end 8 November 2021 (12 months).
- Bug fixes for security issues in 3.10.x will end 9 May 2022 (18 months).
- PHP version: minimum PHP 7.2.0 Note: minimum PHP version has increased since Moodle 3.8. PHP 7.3.x and 7.4.x are supported too.
/lib/ -> externallib.php (source)
Differences Between: [Versions 310 and 311] [Versions 310 and 400] [Versions 310 and 401] [Versions 310 and 402] [Versions 310 and 403] [Versions 39 and 310]
Support for external API
| Copyright: | 2009 Petr Skodak |
| License: | http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later |
| File Size: | 1583 lines (62 kb) |
| Included or required: | 0 times |
| Referenced: | 3 times |
| Includes or requires: | 0 files |
Defines 12 classes
restricted_context_exception:: (1 method):
__construct()
external_api:: (9 methods):
external_function_info()
call_external_function()
set_context_restriction()
set_timeout()
validate_parameters()
clean_returnvalue()
validate_context()
get_context_from_params()
get_context_parameters()
external_description:: (1 method):
__construct()
external_value:: (1 method):
__construct()
external_single_structure:: (1 method):
__construct()
external_multiple_structure:: (1 method):
__construct()
external_function_parameters:: (4 methods):
__construct()
external_generate_token()
external_create_service_token()
external_delete_descriptions()
external_warnings:: (1 method):
__construct()
external_format_value:: (6 methods):
__construct()
external_validate_format()
external_format_string()
external_format_text()
external_generate_token_for_current_user()
external_log_token_request()
external_settings:: (15 methods):
__construct()
__clone()
get_instance()
set_raw()
get_raw()
set_filter()
get_filter()
set_fileurl()
get_fileurl()
set_file()
get_file()
set_lang()
get_lang()
set_timezone()
get_timezone()
external_util:: (2 methods):
validate_courses()
get_area_files()
external_files:: (2 methods):
__construct()
get_properties_for_exporter()
Class: restricted_context_exception - X-Ref
Exception indicating user is not allowed to use external function in the current context.| __construct() X-Ref |
| Constructor |
Class: external_api - X-Ref
Base class for external api methods.| external_function_info($function, $strictness=MUST_EXIST) X-Ref |
| Returns detailed function information param: string|object $function name of external function or record from external_function param: int $strictness IGNORE_MISSING means compatible mode, false returned if record not found, debug message if more found; return: stdClass description or false if not found or exception thrown |
| call_external_function($function, $args, $ajaxonly=false) X-Ref |
| Call an external function validating all params/returns correctly. Note that an external function may modify the state of the current page, so this wrapper saves and restores tha PAGE and COURSE global variables before/after calling the external function. param: string $function A webservice function name. param: array $args Params array (named params) param: boolean $ajaxonly If true, an extra check will be peformed to see if ajax is required. return: array containing keys for error (bool), exception and data. |
| set_context_restriction($context) X-Ref |
| Set context restriction for all following subsequent function calls. param: stdClass $context the context restriction |
| set_timeout($seconds=360) X-Ref |
| This method has to be called before every operation that takes a longer time to finish! param: int $seconds max expected time the next operation needs |
| validate_parameters(external_description $description, $params) X-Ref |
| Validates submitted function parameters, if anything is incorrect invalid_parameter_exception is thrown. This is a simple recursive method which is intended to be called from each implementation method of external API. param: external_description $description description of parameters param: mixed $params the actual parameters return: mixed params with added defaults for optional items, invalid_parameters_exception thrown if any problem found |
| clean_returnvalue(external_description $description, $response) X-Ref |
| Clean response If a response attribute is unknown from the description, we just ignore the attribute. If a response attribute is incorrect, invalid_response_exception is thrown. Note: this function is similar to validate parameters, however it is distinct because parameters validation must be distinct from cleaning return values. param: external_description $description description of the return values param: mixed $response the actual response author: 2010 Jerome Mouneyrac return: mixed response with added defaults for optional items, invalid_response_exception thrown if any problem found |
| validate_context($context) X-Ref |
| Makes sure user may execute functions in this context. param: stdClass $context |
| get_context_from_params($param) X-Ref |
| Get context from passed parameters. The passed array must either contain a contextid or a combination of context level and instance id to fetch the context. For example, the context level can be "course" and instanceid can be courseid. See context_helper::get_all_levels() for a list of valid context levels. param: array $param return: context |
| get_context_parameters() X-Ref |
| Returns a prepared structure to use a context parameters. return: external_single_structure |
Class: external_description - X-Ref
Common ancestor of all parameter description classes| __construct($desc, $required, $default) X-Ref |
| Contructor param: string $desc param: bool $required param: mixed $default |
Class: external_value - X-Ref
Scalar value description class| __construct($type, $desc='', $required=VALUE_REQUIRED,$default=null, $allownull=NULL_ALLOWED) X-Ref |
| Constructor param: mixed $type param: string $desc param: bool $required param: mixed $default param: bool $allownull |
Class: external_function_parameters - X-Ref
Description of top level - PHP function parameters.| __construct(array $keys, $desc='', $required=VALUE_REQUIRED, $default=null) X-Ref |
| Constructor - does extra checking to prevent top level optional parameters. param: array $keys param: string $desc param: bool $required param: array $default |
| external_generate_token($tokentype, $serviceorid, $userid, $contextorid, $validuntil=0, $iprestriction='') X-Ref |
| Generate a token param: string $tokentype EXTERNAL_TOKEN_EMBEDDED|EXTERNAL_TOKEN_PERMANENT param: stdClass|int $serviceorid service linked to the token param: int $userid user linked to the token param: stdClass|int $contextorid param: int $validuntil date when the token expired param: string $iprestriction allowed ip - if 0 or empty then all ips are allowed author: 2010 Jamie Pratt return: string generated token |
| external_create_service_token($servicename, $context) X-Ref |
| Create and return a session linked token. Token to be used for html embedded client apps that want to communicate with the Moodle server through web services. The token is linked to the current session for the current page request. It is expected this will be called in the script generating the html page that is embedding the client app and that the returned token will be somehow passed into the client app being embedded in the page. param: string $servicename name of the web service. Service name as defined in db/services.php param: int $context context within which the web service can operate. return: int returns token id. |
| external_delete_descriptions($component) X-Ref |
| Delete all pre-built services (+ related tokens) and external functions information defined in the specified component. param: string $component name of component (moodle, mod_assignment, etc.) |
Class: external_warnings - X-Ref
Standard Moodle web service warnings| __construct($itemdesc = 'item', $itemiddesc = 'item id',$warningcodedesc = 'the warning code can be used by the client app to implement specific behaviour') X-Ref |
| Constructor |
Class: external_format_value - X-Ref
A pre-filled external_value class for text format.Default is FORMAT_HTML
This should be used all the time in external xxx_params()/xxx_returns functions
as it is the standard way to implement text format param/return values.
| __construct($textfieldname, $required = VALUE_REQUIRED, $default = null) X-Ref |
| Constructor param: string $textfieldname Name of the text field param: int $required if VALUE_REQUIRED then set standard default FORMAT_HTML param: int $default Default value. |
| external_validate_format($format) X-Ref |
| Validate text field format against known FORMAT_XXX param: array $format the format to validate return: the validated format |
| external_format_string($str, $contextorid, $striplinks = true, $options = array() X-Ref |
| Format the string to be returned properly as requested by the either the web service server, either by an internally call. The caller can change the format (raw) with the external_settings singleton All web service servers must set this singleton when parsing the $_GET and $_POST. <pre> Options are the same that in {@link format_string()} with some changes: filter : Can be set to false to force filters off, else observes {@link external_settings}. </pre> param: string $str The string to be filtered. Should be plain text, expect param: boolean $striplinks To strip any link in the result text. Moodle 1.8 default changed from false to true! MDL-8713 param: context|int $contextorid The id of the context for the string or the context (affects filters). param: array $options options array/object or courseid return: string text |
| external_format_text($text, $textformat, $contextorid, $component = null, $filearea = null, $itemid = null,$options = null) X-Ref |
| Format the text to be returned properly as requested by the either the web service server, either by an internally call. The caller can change the format (raw, filter, file, fileurl) with the external_settings singleton All web service servers must set this singleton when parsing the $_GET and $_POST. <pre> Options are the same that in {@link format_text()} with some changes in defaults to provide backwards compatibility: trusted : If true the string won't be cleaned. Default false. noclean : If true the string won't be cleaned only if trusted is also true. Default false. nocache : If true the string will not be cached and will be formatted every call. Default false. filter : Can be set to false to force filters off, else observes {@link external_settings}. para : If true then the returned string will be wrapped in div tags. Default (different from format_text) false. Default changed because div tags are not commonly needed. newlines : If true then lines newline breaks will be converted to HTML newline breaks. Default true. context : Not used! Using contextid parameter instead. overflowdiv : If set to true the formatted text will be encased in a div with the class no-overflow before being returned. Default false. allowid : If true then id attributes will not be removed, even when using htmlpurifier. Default (different from format_text) true. Default changed id attributes are commonly needed. blanktarget : If true all <a> tags will have target="_blank" added unless target is explicitly specified. </pre> param: string $text The content that may contain ULRs in need of rewriting. param: int $textformat The text format. param: context|int $contextorid This parameter and the next two identify the file area to use. param: string $component param: string $filearea helps identify the file area. param: int $itemid helps identify the file area. param: object/array $options text formatting options return: array text + textformat |
| external_generate_token_for_current_user($service) X-Ref |
| Generate or return an existing token for the current authenticated user. This function is used for creating a valid token for users authenticathing via login/token.php or admin/tool/mobile/launch.php. param: stdClass $service external service object return: stdClass token object |
| external_log_token_request($token) X-Ref |
| Set the last time a token was sent and trigger the \core\event\webservice_token_sent event. This function is used when a token is generated by the user via login/token.php or admin/tool/mobile/launch.php. In order to protect the privatetoken, we remove it from the event params. param: stdClass $token token object |
Class: external_settings - X-Ref
Singleton to handle the external settings.We use singleton to encapsulate the "logic"
| __construct() X-Ref |
| Constructor - protected - can not be instanciated |
| __clone() X-Ref |
| Clone - private - can not be cloned |
| get_instance() X-Ref |
| Return only one instance return: \external_settings |
| set_raw($raw) X-Ref |
| Set raw param: boolean $raw |
| get_raw() X-Ref |
| Get raw return: boolean |
| set_filter($filter) X-Ref |
| Set filter param: boolean $filter |
| get_filter() X-Ref |
| Get filter return: boolean |
| set_fileurl($fileurl) X-Ref |
| Set fileurl param: boolean $fileurl |
| get_fileurl() X-Ref |
| Get fileurl return: boolean |
| set_file($file) X-Ref |
| Set file param: string $file |
| get_file() X-Ref |
| Get file return: string |
| set_lang($lang) X-Ref |
| Set lang param: string $lang |
| get_lang() X-Ref |
| Get lang return: string |
| set_timezone($timezone) X-Ref |
| Set timezone param: string $timezone |
| get_timezone() X-Ref |
| Get timezone return: string |
Class: external_util - X-Ref
Utility functions for the external API.| validate_courses($courseids, $courses = array() X-Ref |
| Validate a list of courses, returning the complete course objects for valid courses. Each course has an additional 'contextvalidated' field, this will be set to true unless you set $keepfails, in which case it will be false if validation fails for a course. param: array $courseids A list of course ids param: array $courses An array of courses already pre-fetched, indexed by course id. param: bool $addcontext True if the returned course object should include the full context object. param: bool $keepfails True to keep all the course objects even if validation fails return: array An array of courses and the validation warnings |
| get_area_files($contextid, $component, $filearea, $itemid = false, $useitemidinurl = true) X-Ref |
| Returns all area files (optionally limited by itemid). param: int $contextid context ID param: string $component component param: string $filearea file area param: int $itemid item ID or all files if not specified param: bool $useitemidinurl wether to use the item id in the file URL (modules intro don't use it) return: array of files, compatible with the external_files structure. |
Class: external_files - X-Ref
External structure representing a set of files.| __construct($desc = 'List of files.', $required = VALUE_REQUIRED) X-Ref |
| Constructor param: string $desc Description for the multiple structure. param: int $required The type of value (VALUE_REQUIRED OR VALUE_OPTIONAL). |
| get_properties_for_exporter() X-Ref |
| Return the properties ready to be used by an exporter. return: array properties |
