Create a duplicate of the current object.
ARG may be either a file descriptor (reference to a GLOB) or a reference to an array. If given the new object will be initialized with headers either from the array of read from the file descriptor.
OPTIONS is a list of options given in the form of key-value pairs, just like a hash table. Valid options are
Option | Default |
---|---|
FoldLength | 79 |
MailFrom | 'KEEP' |
Modify |
|
Be warned that the next constructors all require an already created header object, of which the original content will be destroyed.
Empty an existing Mail::Header
object of all lines.
Extract a header from the given array into an existing Mail::Header
object. extract
will modify this array.
Returns the object that the method was called on.
header
does multiple operations. First it will extract a header from
the ARRAY, if given. It will then reformat the header (if reformatting
is permitted), and finally return a reference to an array which
contains the header in a printable form.
As header(), but it will eventually set headers from a hash reference, and it will return the headers as a hash reference.
$fields->{From} = 'Tobias Brox <tobix@cpan.org>'; $fields->{To} = ['you@somewhere', 'me@localhost']; $head->header_hashref($fields);
Read a header from the given file descriptor into an existing Mail::Header object.
Set the default fold length for all tags or just one. With no arguments
the default fold length is returned. With two arguments it sets the fold
length for the given tag and returns the previous value. If only LENGTH
is given it sets the default fold length for the current object.
In the two argument form fold_length
may be called as a static method,
setting default fold lengths for tags that will be used by all
Mail::Header
objects. See the fold
method for
a description on how Mail::Header
uses these values.
This specifies what to do when a `From '
line is encountered.
Valid values are IGNORE
- ignore and discard the header,
ERROR
- invoke an error (call die), COERCE
- rename them as Mail-From
and KEEP
- keep them.
If VALUE
is false then Mail::Header
will not do any automatic
reformatting of the headers, other than to ensure that the line
starts with the tags given.
Add a new line to the header. If TAG is undef
the tag will be
extracted from the beginning of the given line. If INDEX is given,
the new line will be inserted into the header at the given point, otherwise
the new line will be appended to the end of the header.
Returns the header as a single string.
Remove any header line that, other than the tag, only contains whitespace
Combine all instances of TAG into one. The lines will be joined together WITH, or a single space if not given. The new item will be positioned in the header where the first instance was, all other instances of TAG will be removed.
Returns the number of times the given atg appears in the header
Delete a tag from the header. If an INDEX id is given, then the Nth instance of the tag will be removed. If no INDEX is given, then all instances of tag will be removed.
Fold the header. If LENGTH is not given, then Mail::Header
uses the
following rules to determine what length to fold a line.
Get the text from a line. If an INDEX is given, then the text of the Nth
instance will be returned. If it is not given the return value depends on the
context in which get
was called. In an array context a list of all the
text from all the instances of the TAG will be returned. In a scalar context
the text for the first instance will be returned.
The lines are unfolded, but still terminated with a new-line (see chomp
)
Print the header to the given file descriptor, or STDOUT
if no
file descriptor is given.
Replace a line in the header. If TAG is undef
the tag will be
extracted from the beginning of the given line. If INDEX is given
the new line will replace the Nth instance of that tag, otherwise the
first instance of the tag is replaced. If the tag does not appear in the
header then a new line will be appended to the header.
Returns an array of all the tags that exist in the header. Each tag will only appear in the list once. The order of the tags is not specified.
Unfold all instances of the given tag so that they do not spread across
multiple lines. If TAG
is not given then all lines are unfolded.
The unfolding process is wrong but (for compatibility reasons) will not be repaired: only one blank at the start of the line should be removed, not all of them.