# phpman > man > Mail::Box::Parser::Perl

## NAME
    [Mail::Box::Parser::Perl](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser%3A%3APerl/markdown) - reading messages from file using Perl

## INHERITANCE
     [Mail::Box::Parser::Perl](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser%3A%3APerl/markdown)
       is a [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)
       is a [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

## SYNOPSIS
## DESCRIPTION
    The "[Mail::Box::Parser::Perl](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser%3A%3APerl/markdown)" implements parsing of messages in Perl. This may be a little
    slower than the "C" based parser [Mail::Box::Parser::C](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser%3A%3AC/markdown), but will also work on platforms where no
    C compiler is available.

    Extends "DESCRIPTION" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown).

## METHODS
    Extends "METHODS" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown).

### Constructors
    Extends "Constructors" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown).

    [Mail::Box::Parser::Perl](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser%3A%3APerl/markdown)->new(%options)
         -Option           --Defined in       --Default
          file               [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)  undef
          filename           [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)  <required>
          fix_header_errors                     <false>
          log                [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)     'WARNINGS'
          mode               [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)  'r'
          trace              [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)     'WARNINGS'
          trusted                               <false>

        file => FILE-HANDLE
        filename => FILENAME
        fix_header_errors => BOOLEAN
          When header errors are detected, the parsing of the header will be stopped. Other header
          lines will become part of the body of the message. Set this flag to have the erroneous
          line added to the previous header line.

        log => LEVEL
        mode => OPENMODE
        trace => LEVEL
        trusted => BOOLEAN
          Is the input from the file to be trusted, or does it require extra tests. Related to
          [Mail::Box::new](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3Anew/markdown)(trusted).

### The parser
    Extends "The parser" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown).

    $obj->fileChanged()
        Inherited, see "The parser" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)

    $obj->filename()
        Inherited, see "The parser" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)

    $obj->fixHeaderErrors( [BOOLEAN] )
        If set to "true", parsing of a header will not stop on an error, but attempt to add the
        erroneous this line to previous field. Without BOOLEAN, the current setting is returned.

        example:

         $folder->parser->[fixHeaderErrors(1)](https://www.chedong.com/phpMan.php/man/fixHeaderErrors/1/markdown);
         my $folder = $mgr->open('folder', fix_header_errors => 1);

    $obj->restart()
        Inherited, see "The parser" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)

    $obj->start(%options)
        Inherited, see "The parser" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)

    $obj->stop()
        Inherited, see "The parser" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)

### Parsing
    Extends "Parsing" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown).

    $obj->bodyAsFile( $fh [$chars, [$lines]] )
        Inherited, see "Parsing" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)

    $obj->bodyAsList( [$chars, [$lines]] )
        Inherited, see "Parsing" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)

    $obj->bodyAsString( [$chars, [$lines]] )
        Inherited, see "Parsing" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)

    $obj->bodyDelayed( [$chars, [$lines]] )
        Inherited, see "Parsing" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)

    $obj->filePosition( [$position] )
        Inherited, see "Parsing" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)

    $obj->lineSeparator()
        Inherited, see "Parsing" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)

    $obj->popSeparator()
        Inherited, see "Parsing" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)

    $obj->pushSeparator(STRING|Regexp)
        Inherited, see "Parsing" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)

    $obj->readHeader()
    $obj->readSeparator(%options)
        Inherited, see "Parsing" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)

### Internals
    Extends "Internals" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown).

    $obj->closeFile()
        Inherited, see "Internals" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)

    $obj->defaultParserType( [$class] )
    [Mail::Box::Parser::Perl](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser%3A%3APerl/markdown)->defaultParserType( [$class] )
        Inherited, see "Internals" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)

    $obj->openFile($args)
        Inherited, see "Internals" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)

    $obj->takeFileInfo()
        Inherited, see "Internals" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown)

### Error handling
    Extends "Error handling" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown).

    $obj->AUTOLOAD()
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->addReport($object)
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->defaultTrace( [$level]|[$loglevel, $tracelevel]|[$level, $callback] )
    [Mail::Box::Parser::Perl](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser%3A%3APerl/markdown)->defaultTrace( [$level]|[$loglevel, $tracelevel]|[$level, $callback] )
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->errors()
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->log( [$level, [$strings]] )
    [Mail::Box::Parser::Perl](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser%3A%3APerl/markdown)->log( [$level, [$strings]] )
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->logPriority($level)
    [Mail::Box::Parser::Perl](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser%3A%3APerl/markdown)->logPriority($level)
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->logSettings()
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->notImplemented()
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->report( [$level] )
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->reportAll( [$level] )
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->trace( [$level] )
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

    $obj->warnings()
        Inherited, see "Error handling" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

### Cleanup
    Extends "Cleanup" in [Mail::Box::Parser](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3AParser/markdown).

    $obj->DESTROY()
        Inherited, see "Cleanup" in [Mail::Reporter](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3AReporter/markdown)

## DIAGNOSTICS
    Warning: File $filename changed during access.
        When a message parser starts working, it takes size and modification time of the file at
        hand. If the folder is written, it checks whether there were changes in the file made by
        external programs.

        Calling [Mail::Box::update](https://www.chedong.com/phpMan.php/perldoc/Mail%3A%3ABox%3A%3Aupdate/markdown)() on a folder before it being closed will read these new messages.
        But the real source of this problem is locking: some external program (for instance the mail
        transfer agent, like sendmail) uses a different locking mechanism as you do and therefore
        violates your rights.

    Error: Package $package does not implement $method.
        Fatal error: the specific package (or one of its superclasses) does not implement this
        method where it should. This message means that some other related classes do implement this
        method however the class at hand does not. Probably you should investigate this and probably
        inform the author of the package.

    Warning: Unexpected end of header in $source: $line
        While parsing a message from the specified source (usually a file name), the parser found a
        syntax error. According to the MIME specification in the RFCs, each header line must either
        contain a colon, or start with a blank to indicate a folded field. Apparently, this header
        contains a line which starts on the first position, but not with a field name.

        By default, parsing of the header will be stopped. If there are more header lines after the
        erroneous line, they will be added to the body of the message. In case of new(fix_headers)
        set, the parsing of the header will be continued. The erroneous line will be added to the
        preceding field.

## SEE ALSO
    This module is part of Mail-Message distribution version 3.012, built on February 11, 2022.
    Website: <http://perl.overmeer.net/CPAN/>

## LICENSE
    Copyrights 2001-2022 by [Mark Overmeer <<markov@cpan.org>>]. For other contributors see ChangeLog.

    This program is free software; you can redistribute it and/or modify it under the same terms as
    Perl itself. See <http://dev.perl.org/licenses/>