NAME

Multipart::Encoder - encoder for mime-type multipart/form-data.

VERSION

v0.0.3

SINOPSIS

    `echo "Simple text." > /tmp/file.txt`;
    $?      #  0
    `gzip < /tmp/file.txt > /tmp/file.gz`;
    $?      #  0
    
    use Multipart::Encoder;
    
    my $multipart = Multipart::Encoder->new(
            x=>1,
            file_name => \"/tmp/file.txt",
            y=>[
                    "Content-Type" => "text/json",
                    name => 'my-name',
                    filename => 'my-filename',
                    _ => '{"count": 666}',
                    'Any-Header' => 123,
            ],
            z => {
                    _ => \'/tmp/file.gz',
                    'Any-Header' => 123,
            }
    )->buffer_size(2048)->boundary("xYzZY");
    
    my $str = $multipart->as_string;
    
    utf8::is_utf8($str)                     ## ""
    
    $str                                            #~ \r\n--xYzZY--\r\n\z
    
    $multipart->to("/tmp/file.form-data");
    
    open my $f, "<", "/tmp/file.form-data"; binmode $f; read $f, my $buf, -s $f; close $f;
    
    utf8::is_utf8($buf)                     ## ""
    
    $buf                                            ## $str
    
    $multipart->to(\*STDOUT);       ##>> $str

DESCRIPTION

The encoder in 'multipart/form-data' is not represented in perl libraries. It is only used as part of other libraries, for example, CHTTP::Tiny::Multipart.

But there is no such library for AnyEvent::HTTP.

The only module CHTTP::Body::Builder::MultiPart does not allow adding a file as a string to a multipart.

INSTALL

$ cpm install -g Multipart::Encoder

SUBROUTINES/METHODS

new

Constructor.

    my $multipart1 = Multipart::Encoder->new;
    my $multipart2 = $multipart1->new;
    $multipart2     ##!= $multipart1
    
    ref Multipart::Encoder::new(0)  # 0

Return new object.

Arguments is a params for serialize to multipart-format.

    Multipart::Encoder->new(x=>123)->as_string    #~ 123

content_type

    $multipart->content_type        # multipart/form-data

buffer_size

Set or get buffer size. Buffer using for write to file.

    $multipart->buffer_size(1024)->buffer_size              # 1024

Default buffer size:

    Multipart::Encoder->new->buffer_size                    # 2048

boundary

Boundary is a separator before params in multipart-data.

    $multipart->boundary("XYZooo")->boundary                # XYZooo

Default boundary:

    Multipart::Encoder->new->boundary                               # xYzZY

as_string

Serialize params to a string.

    Multipart::Encoder->new(x=>123, y=>456)->as_string   #~ 123

to

Serialize params and print it in multipart format to a file use buffer with buffer_size. Argument for to must by path or filehandle.

    $multipart->to("/tmp/file.form-data");
    
    open my $f, ">", "/tmp/file.form-data"; binmode $f;
    $multipart->to($f);
    close $f;

If file not open raise the die.

    $multipart->to("/")             #@ ~ Not open file `/`. Is a directory

PARAMS

Param types is file and string.

String param type

    Multipart::Encoder->new(x=>"Simple string")->as_string  #~ Simple string

With headers:

    my $str = Multipart::Encoder->new(
            x => {
                    _ => "Simple string",
                    header => 123,
            },
    )->as_string;
    
    $str #~ Simple string
    $str #~ header: 123

Header Content-Disposition added automically.

    Multipart::Encoder->new(x=>"Simple string")->as_string  #~ Content-Disposition: form-data; name="x"

Name in Content-Disposition set as key, or name-header:

    my $str = Multipart::Encoder->new(
            x => {
                    _ => "Simple string",
                    name => "xyz",
            },
    )->as_string;
    
    $str #~ Content-Disposition: form-data; name="xyz"

If need filename in Content-Disposition, add it:

    my $str = Multipart::Encoder->new(
            0 => {
                    _ => "Simple string",
                    filename => "xyz.tgz",
            },
    )->as_string;
    
    $str #~ Content-Disposition: form-data; name="0"; filename="xyz.tgz"

If Content-Disposition is, then it use once.

    my $str = Multipart::Encoder->new(
            x => {
                    _ => "Simple string",
                    'content-disposition' => "form-data; name=\"z\"; filename=\"xyz\"",
            },
    )->as_string;
    
    $str #~ content-disposition: form-data; name="z"; filename="xyz"

File param type

Header Content-Disposition added automically.

    open my $f, ">/tmp/0"; close $f;
    
    Multipart::Encoder->new(x=>\"/tmp/0")->as_string        #~ Content-Disposition: form-data; name="x"; filename="0"

Header Content-Type added automically.

    Multipart::Encoder->new(x=>\"/tmp/file.gz")->as_string  #~ Content-Type: application/x-gzip; charset=binary

But if it is, then used once.

    my $str = Multipart::Encoder->new(
            x => [
                    _ => \"/tmp/file.gz",
                    'content-type' => 'text/plain',
            ]
    )->as_string;
    
    $str #~ content-type: text/plain
    $str #!~ Content-Type