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<?php
/**
* Whoops - php errors for cool kids
* @author Filipe Dobreira <http://github.com/filp>
* Plaintext handler for command line and logs.
* @author Pierre-Yves Landuré <https://howto.biapy.com/>
*/
namespace Whoops\Handler;
use InvalidArgumentException;
use Psr\Log\LoggerInterface;
use Whoops\Exception\Frame;
/**
* Handler outputing plaintext error messages. Can be used
* directly, or will be instantiated automagically by Whoops\Run
* if passed to Run::pushHandler
*/
class PlainTextHandler extends Handler
{
const VAR_DUMP_PREFIX = ' | ';
/**
* @var \Psr\Log\LoggerInterface
*/
protected $logger;
/**
* @var callable
*/
protected $dumper;
/**
* @var bool
*/
private $addTraceToOutput = true;
/**
* @var bool|integer
*/
private $addTraceFunctionArgsToOutput = false;
/**
* @var integer
*/
private $traceFunctionArgsOutputLimit = 1024;
/**
* @var bool
*/
private $loggerOnly = false;
/**
* Constructor.
* @throws InvalidArgumentException If argument is not null or a LoggerInterface
* @param \Psr\Log\LoggerInterface|null $logger
*/
public function __construct($logger = null)
{
$this->setLogger($logger);
}
/**
* Set the output logger interface.
* @throws InvalidArgumentException If argument is not null or a LoggerInterface
* @param \Psr\Log\LoggerInterface|null $logger
*/
public function setLogger($logger = null)
{
if (! (is_null($logger)
|| $logger instanceof LoggerInterface)) {
throw new InvalidArgumentException(
'Argument to ' . __METHOD__ .
" must be a valid Logger Interface (aka. Monolog), " .
get_class($logger) . ' given.'
);
}
$this->logger = $logger;
}
/**
* @return \Psr\Log\LoggerInterface|null
*/
public function getLogger()
{
return $this->logger;
}
/**
* Set var dumper callback function.
*
* @param callable $dumper
* @return void
*/
public function setDumper(callable $dumper)
{
$this->dumper = $dumper;
}
/**
* Add error trace to output.
* @param bool|null $addTraceToOutput
* @return bool|$this
*/
public function addTraceToOutput($addTraceToOutput = null)
{
if (func_num_args() == 0) {
return $this->addTraceToOutput;
}
$this->addTraceToOutput = (bool) $addTraceToOutput;
return $this;
}
/**
* Add error trace function arguments to output.
* Set to True for all frame args, or integer for the n first frame args.
* @param bool|integer|null $addTraceFunctionArgsToOutput
* @return null|bool|integer
*/
public function addTraceFunctionArgsToOutput($addTraceFunctionArgsToOutput = null)
{
if (func_num_args() == 0) {
return $this->addTraceFunctionArgsToOutput;
}
if (! is_integer($addTraceFunctionArgsToOutput)) {
$this->addTraceFunctionArgsToOutput = (bool) $addTraceFunctionArgsToOutput;
} else {
$this->addTraceFunctionArgsToOutput = $addTraceFunctionArgsToOutput;
}
}
/**
* Set the size limit in bytes of frame arguments var_dump output.
* If the limit is reached, the var_dump output is discarded.
* Prevent memory limit errors.
* @var integer
*/
public function setTraceFunctionArgsOutputLimit($traceFunctionArgsOutputLimit)
{
$this->traceFunctionArgsOutputLimit = (integer) $traceFunctionArgsOutputLimit;
}
/**
* Create plain text response and return it as a string
* @return string
*/
public function generateResponse()
{
$exception = $this->getException();
return sprintf(
"%s: %s in file %s on line %d%s\n",
get_class($exception),
$exception->getMessage(),
$exception->getFile(),
$exception->getLine(),
$this->getTraceOutput()
);
}
/**
* Get the size limit in bytes of frame arguments var_dump output.
* If the limit is reached, the var_dump output is discarded.
* Prevent memory limit errors.
* @return integer
*/
public function getTraceFunctionArgsOutputLimit()
{
return $this->traceFunctionArgsOutputLimit;
}
/**
* Only output to logger.
* @param bool|null $loggerOnly
* @return null|bool
*/
public function loggerOnly($loggerOnly = null)
{
if (func_num_args() == 0) {
return $this->loggerOnly;
}
$this->loggerOnly = (bool) $loggerOnly;
}
/**
* Test if handler can output to stdout.
* @return bool
*/
private function canOutput()
{
return !$this->loggerOnly();
}
/**
* Get the frame args var_dump.
* @param \Whoops\Exception\Frame $frame [description]
* @param integer $line [description]
* @return string
*/
private function getFrameArgsOutput(Frame $frame, $line)
{
if ($this->addTraceFunctionArgsToOutput() === false
|| $this->addTraceFunctionArgsToOutput() < $line) {
return '';
}
// Dump the arguments:
ob_start();
$this->dump($frame->getArgs());
if (ob_get_length() > $this->getTraceFunctionArgsOutputLimit()) {
// The argument var_dump is to big.
// Discarded to limit memory usage.
ob_clean();
return sprintf(
"\n%sArguments dump length greater than %d Bytes. Discarded.",
self::VAR_DUMP_PREFIX,
$this->getTraceFunctionArgsOutputLimit()
);
}
return sprintf(
"\n%s",
preg_replace('/^/m', self::VAR_DUMP_PREFIX, ob_get_clean())
);
}
/**
* Dump variable.
*
* @param mixed $var
* @return void
*/
protected function dump($var)
{
if ($this->dumper) {
call_user_func($this->dumper, $var);
} else {
var_dump($var);
}
}
/**
* Get the exception trace as plain text.
* @return string
*/
private function getTraceOutput()
{
if (! $this->addTraceToOutput()) {
return '';
}
$inspector = $this->getInspector();
$frames = $inspector->getFrames();
$response = "\nStack trace:";
$line = 1;
foreach ($frames as $frame) {
/** @var Frame $frame */
$class = $frame->getClass();
$template = "\n%3d. %s->%s() %s:%d%s";
if (! $class) {
// Remove method arrow (->) from output.
$template = "\n%3d. %s%s() %s:%d%s";
}
$response .= sprintf(
$template,
$line,
$class,
$frame->getFunction(),
$frame->getFile(),
$frame->getLine(),
$this->getFrameArgsOutput($frame, $line)
);
$line++;
}
return $response;
}
/**
* @return int
*/
public function handle()
{
$response = $this->generateResponse();
if ($this->getLogger()) {
$this->getLogger()->error($response);
}
if (! $this->canOutput()) {
return Handler::DONE;
}
echo $response;
return Handler::QUIT;
}
/**
* @return string
*/
public function contentType()
{
return 'text/plain';
}
}