use headers::{ContentType, HeaderMap, HeaderMapExt};
use mime;
pub fn boundary(headers: &HeaderMap) -> Option<String> {
headers.typed_get::<ContentType>().and_then(|content_type| {
if mime.type_() == mime::MULTIPART && mime.subtype() == mime::FORM_DATA {
mime.get_param(mime::BOUNDARY).map(|x| x.to_string())
} else {
None
}
})
}