Handler class for MWExceptions. More...

Static Public Member Functions
static	getLogContext ($e)
	Get a PSR-3 log event context from an Exception. More...

static	getLogId ($e)
	Get the ID for this exception. More...

static	getLogMessage ($e)
	Get a message formatting the exception message and its origin. More...

static	getPublicLogMessage ($e)

static	getRedactedTrace ($e)
	Return a copy of an exception's backtrace as an array. More...

static	getRedactedTraceAsString ($e)
	Generate a string representation of an exception's stack trace. More...

static	getStructuredExceptionData ($e)
	Get a structured representation of an Exception. More...

static	getURL ()
	If the exception occurred in the course of responding to a request, returns the requested URL. More...

static	handleError ($level, $message, $file=null, $line=null)
	Handler for set_error_handler() callback notifications. More...

static	handleException ($e)
	Exception handler which simulates the appropriate catch() handling: More...

static	handleFatalError ($level=null, $message=null, $file=null, $line=null, $context=null, $trace=null)
	Dual purpose callback used as both a set_error_handler() callback and a registered shutdown function. More...

static	installHandler ()
	Install handlers with PHP. More...

static	jsonSerializeException ($e, $pretty=false, $escaping=0)
	Serialize an Exception object to JSON. More...

static	logException ($e)
	Log an exception to the exception log (if enabled). More...

static	prettyPrintTrace (array $trace, $pad= '')
	Generate a string representation of a stacktrace. More...

static	redactTrace (array $trace)
	Redact a stacktrace generated by Exception::getTrace(), debug_backtrace() or similar means. More...

static	rollbackMasterChangesAndLog ($e)
	If there are any open database transactions, roll them back and log the stack trace of the exception that should have been caught so the transaction could be aborted properly. More...

Static Protected Member Functions
static	logError (ErrorException $e, $channel)
	Log an exception that wasn't thrown but made to wrap an error. More...

static	report ($e)
	Report an exception to the user. More...

Static Protected Attributes
static	$fatalErrorTypes

static	$handledFatalCallback = false

static	$reservedMemory

Detailed Description

Handler class for MWExceptions.

Definition at line 28 of file MWExceptionHandler.php.

Member Function Documentation

static MWExceptionHandler::getLogContext ( $e )

static

Get a PSR-3 log event context from an Exception.

Creates a structured array containing information about the provided exception that can be used to augment a log message sent to a PSR-3 logger.

Parameters

Exception | Throwable $e

Returns: array

Definition at line 469 of file MWExceptionHandler.php.

References $e, and WebRequest\getRequestId().

static MWExceptionHandler::getLogId ( $e )

static

Get the ID for this exception.

The ID is saved so that one can match the one output to the user (when $wgShowExceptionDetails is set to false), to the entry in the debug log.

Since: 1.22

Deprecated:

since 1.27: Exception IDs are synonymous with request IDs.

Parameters

Exception | Throwable $e

Returns: string

Definition at line 409 of file MWExceptionHandler.php.

References WebRequest\getRequestId(), and wfDeprecated().

static MWExceptionHandler::getLogMessage ( $e )

static

Get a message formatting the exception message and its origin.

Since: 1.22

Parameters

Exception | Throwable $e

Returns: string

Definition at line 436 of file MWExceptionHandler.php.

References $e, $line, $type, and WebRequest\getRequestId().

Referenced by ResourceLoader\formatExceptionNoComment(), MWException\getHTML(), MWExceptionRenderer\getHTML(), MWException\getText(), MWExceptionRenderer\getText(), and MWExceptionRenderer\output().

static MWExceptionHandler::getPublicLogMessage ( $e )

static

Parameters

Exception | Throwable $e

Returns: string

Definition at line 451 of file MWExceptionHandler.php.

References $e, $type, and WebRequest\getRequestId().

Referenced by ResourceLoader\formatExceptionNoComment(), and MWExceptionRenderer\output().

static MWExceptionHandler::getRedactedTrace ( $e )

static

Return a copy of an exception's backtrace as an array.

Like Exception::getTrace, but replaces each element in each frame's argument array with the name of its class (if the element is an object) or its type (if the element is a PHP primitive).

Since: 1.22

Parameters

Exception | Throwable $e

Returns: array

Definition at line 373 of file MWExceptionHandler.php.

References $e.

Referenced by MediaWiki\Logger\LegacyLogger\format(), and MWExceptionHandlerTest\testGetRedactedTrace().

static MWExceptionHandler::getRedactedTraceAsString ( $e )

static

Generate a string representation of an exception's stack trace.

Like Exception::getTraceAsString, but replaces argument values with argument type or class name.

Parameters

Exception | Throwable $e

Returns: string

See also: prettyPrintTrace()

Definition at line 314 of file MWExceptionHandler.php.

References $e.

Referenced by MWException\getHTML(), MWExceptionRenderer\getHTML(), MWException\getText(), MWExceptionRenderer\getText(), MWExceptionRenderer\output(), and ApiMain\substituteResultWithError().

static MWExceptionHandler::getStructuredExceptionData ( $e )

static

Get a structured representation of an Exception.

Returns an array of structured data (class, message, code, file, backtrace) derived from the given exception. The backtrace information will be redacted as per getRedactedTraceAsArray().

Parameters

Exception | Throwable $e

Returns: array

Since: 1.26

Definition at line 487 of file MWExceptionHandler.php.

References $e, WebRequest\getRequestId(), and global.

static MWExceptionHandler::getURL ( )

static

If the exception occurred in the course of responding to a request, returns the requested URL.

Otherwise, returns false.

Since: 1.23

Returns: string|false

Definition at line 421 of file MWExceptionHandler.php.

References $wgRequest, and global.

Referenced by MWException\getHTML(), and MWExceptionRenderer\getHTML().

static MWExceptionHandler::handleError	(	$level,
		$message,
		$file = `null`,
		$line = `null`
	)

static

Handler for set_error_handler() callback notifications.

Receive a callback from the interpreter for a raised error, create an ErrorException, and log the exception to the 'error' logging channel(s). If the raised error is a fatal error type (only under HHVM) delegate to handleFatalError() instead.

Since: 1.25

Parameters

int	$level	Error level raised
string	$message
string	$file
int	$line

Returns: bool

See also: logError()

Definition at line 161 of file MWExceptionHandler.php.

References $e, and $line.

static MWExceptionHandler::handleException ( $e )

static

Exception handler which simulates the appropriate catch() handling:

try { ... } catch ( Exception $e ) { $e->report(); } catch ( Exception $e ) { echo $e->__toString(); }

Since: 1.25

Parameters

Exception | Throwable $e

Definition at line 121 of file MWExceptionHandler.php.

References $e.

Referenced by MediaWiki\doPostOutputShutdown(), and MediaWiki\run().

static MWExceptionHandler::handleFatalError	(	$level = `null`,
		$message = `null`,
		$file = `null`,
		$line = `null`,
		$context = `null`,
		$trace = `null`
	)

static

Dual purpose callback used as both a set_error_handler() callback and a registered shutdown function.

Receive a callback from the interpreter for a raised error or system shutdown, check for a fatal error, and log to the 'fatal' logging channel.

Special handling is included for missing class errors as they may indicate that the user needs to install 3rd-party libraries via Composer or other means.

Since: 1.25

Parameters

int	$level	Error level raised
string	$message	Error message
string	$file	File that error was raised in
int	$line	Line number error was raised at
array	$context	Active symbol table point of error
array	$trace	Backtrace at point of error (undocumented HHVM feature)

Returns: bool Always returns false

Definition at line 227 of file MWExceptionHandler.php.

References $line, on, or, and wfRandomString().

static MWExceptionHandler::installHandler ( )

static

Install handlers with PHP.

Definition at line 49 of file MWExceptionHandler.php.

static MWExceptionHandler::jsonSerializeException	(	$e,
		$pretty = `false`,
		$escaping = `0`
	)

static

Serialize an Exception object to JSON.

The JSON object will have keys 'id', 'file', 'line', 'message', and 'url'. These keys map to string values, with the exception of 'line', which is a number, and 'url', which may be either a string URL or or null if the exception did not occur in the context of serving a web request.

If $wgLogExceptionBacktrace is true, it will also have a 'backtrace' key, mapped to the array return value of Exception::getTrace, but with each element in each frame's "args" array (if set) replaced with the argument's class name (if the argument is an object) or type name (if the argument is a PHP primitive).

Sample JSON record ($wgLogExceptionBacktrace = false):: {

"id": "c41fb419",

"type": "MWException",

"file": "/var/www/mediawiki/includes/cache/MessageCache.php",

"line": 704,

"message": "Non-string key given",

"url": "/wiki/Main_Page"

}

Sample JSON record ($wgLogExceptionBacktrace = true):: {

"id": "dc457938",

"type": "MWException",

"file": "/vagrant/mediawiki/includes/cache/MessageCache.php",

"line": 704,

"message": "Non-string key given",

"url": "/wiki/Main_Page",

"backtrace": [{

"file": "/vagrant/mediawiki/extensions/VisualEditor/VisualEditor.hooks.php",

"line": 80,

"function": "get",

"class": "MessageCache",

"type": "->",

"args": ["array"]

}]

}

Since: 1.23

Parameters

Exception \| Throwable	$e
bool	$pretty	Add non-significant whitespace to improve readability (default: false).
int	$escaping	Bitfield consisting of FormatJson::.*_OK class constants.

Returns: string|false JSON string if successful; false upon failure

Definition at line 571 of file MWExceptionHandler.php.

References $e, and FormatJson\encode().

Referenced by MWExceptionTest\testJsonserializeexceptionBacktracingDisabled(), MWExceptionTest\testJsonserializeexceptionBacktracingEnabled(), MWExceptionTest\testJsonserializeexceptionKeys(), and MWExceptionTest\testJsonSerializeExceptions().

static MWExceptionHandler::logError	(	ErrorException	$e,
			$channel
	)

staticprotected

Log an exception that wasn't thrown but made to wrap an error.

Since: 1.25

Parameters

ErrorException	$e
string	$channel

Definition at line 610 of file MWExceptionHandler.php.

References $suppressed, FormatJson\ALL_OK, and Hooks\run().

static MWExceptionHandler::logException ( $e )

static

Log an exception to the exception log (if enabled).

This method must not assume the exception is an MWException, it is also used to handle PHP exceptions or exceptions from other libraries.

Since: 1.22

Parameters

Exception | Throwable $e

Definition at line 585 of file MWExceptionHandler.php.

References $e, FormatJson\ALL_OK, and Hooks\run().

Referenced by ResourceLoader\applyFilter(), WikiPage\doViewUpdates(), JobRunner\executeJob(), ApiMain\handleException(), ResourceLoader\makeModuleResponse(), JobQueueGroup\pushLazyJobs(), ResourceLoader\respond(), User\saveSettings(), and MediaWiki\triggerJobs().

static MWExceptionHandler::prettyPrintTrace	(	array	$trace,
			$pad = `''`
	)

static

Generate a string representation of a stacktrace.

Parameters

array	$trace
string	$pad	Constant padding to add to each line of trace

Returns: string

Since: 1.26

Definition at line 326 of file MWExceptionHandler.php.

References as.

Referenced by MediaWiki\Logger\LegacyLogger\format(), and MediaWiki\Logger\Monolog\LineFormatter\normalizeExceptionArray().

static MWExceptionHandler::redactTrace ( array $trace )

static

Redact a stacktrace generated by Exception::getTrace(), debug_backtrace() or similar means.

Replaces each element in each frame's argument array with the name of its class (if the element is an object) or its type (if the element is a PHP primitive).

Since: 1.26

Parameters

array $trace Stacktrace

Returns: array Stacktrace with arugment values converted to data types

Definition at line 387 of file MWExceptionHandler.php.

Referenced by MediaWiki\Logger\Monolog\LineFormatter\exceptionAsArray().

static MWExceptionHandler::report ( $e )

staticprotected

Report an exception to the user.

Parameters

Exception | Throwable $e

Definition at line 62 of file MWExceptionHandler.php.

References $e, MWExceptionRenderer\AS_PRETTY, MWExceptionRenderer\AS_RAW, and MWExceptionRenderer\output().

static MWExceptionHandler::rollbackMasterChangesAndLog ( $e )

static

If there are any open database transactions, roll them back and log the stack trace of the exception that should have been caught so the transaction could be aborted properly.

Since: 1.23

Parameters

Exception | Throwable $e

Definition at line 89 of file MWExceptionHandler.php.

References $e, $lbFactory, and $services.

Referenced by DeferredUpdates\execute(), JobRunner\executeJob(), ApiMain\handleException(), AssembleUploadChunksJob\run(), PublishStashedFileJob\run(), and DeferredUpdates\runUpdate().

Member Data Documentation

array MWExceptionHandler::$fatalErrorTypes

staticprotected

Initial value:

= [
        E_ERROR, E_PARSE, E_CORE_ERROR, E_COMPILE_ERROR, E_USER_ERROR,
         16777217,
    ]

Definition at line 37 of file MWExceptionHandler.php.

bool MWExceptionHandler::$handledFatalCallback = false

staticprotected

Definition at line 44 of file MWExceptionHandler.php.

string MWExceptionHandler::$reservedMemory

staticprotected

Definition at line 33 of file MWExceptionHandler.php.

The documentation for this class was generated from the following file:

includes/exception/MWExceptionHandler.php

Static Public Member Functions

Static Protected Member Functions

Static Protected Attributes

Detailed Description

Member Function Documentation

Member Data Documentation