oh-my-god.pl

### これはOK

    local $HTTP::Request::Common::DYNAMIC_FILE_UPLOAD = 1;

    my $uri = URI->new( 'https://exapmpe.com/post');
    my $request = POST $uri,
        Content_Type => 'multipart/form-data',
        Content      => [
            file1 => [ 'file1.mp4' ],
            file2 => [ 'file2.jpg' ],
            param1 => 'abc',
            param2 => '日本語',
            param3 => 123,
        ];


### これはNG

    local $HTTP::Request::Common::DYNAMIC_FILE_UPLOAD = 1;

    my $uri = URI->new( 'https://exapmpe.com/post');
    my $request = POST $uri,
        Content_Type => 'multipart/form-data',
        Content      => [
            param1 => 'abc',
            param2 => '日本語',
            param3 => 123,
            file1 => [ 'file1.mp4' ],
            file2 => [ 'file2.jpg' ],
        ];