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use std::fmt;
use std::io::{Cursor, Read};
use futures::{Async, Future, Poll, Stream};
use headers::ContentType;
use mime::Mime;
use multipart_c::server::Multipart;
use filter::{FilterBase, Filter};
use reject::{self, Rejection};
const DEFAULT_FORM_DATA_MAX_LENGTH: u64 = 1024 * 1024 * 2;
#[derive(Debug, Clone)]
pub struct FormOptions {
max_length: u64,
}
pub struct FormData {
inner: Multipart<Cursor<::hyper::Chunk>>,
}
pub struct Part {
name: String,
filename: Option<String>,
content_type: Option<String>,
data: Option<Vec<u8>>,
}
pub fn form() -> FormOptions {
FormOptions {
max_length: DEFAULT_FORM_DATA_MAX_LENGTH,
}
}
impl FormOptions {
pub fn max_length(mut self, max: u64) -> Self {
self.max_length = max;
self
}
}
type FormFut = Box<dyn Future<Item = (FormData,), Error = Rejection> + Send>;
impl FilterBase for FormOptions {
type Extract = (FormData,);
type Error = Rejection;
type Future = FormFut;
fn filter(&self) -> Self::Future {
let boundary = super::header::header2::<ContentType>()
.and_then(|ct| {
let mime = Mime::from(ct);
mime.get_param("boundary")
.map(|v| v.to_string())
.ok_or_else(|| reject::invalid_header("content-type"))
});
let filt = super::body::content_length_limit(self.max_length)
.and(boundary)
.and(super::body::concat())
.map(|boundary, body: super::body::FullBody| {
FormData {
inner: Multipart::with_body(Cursor::new(body.into_chunk()), boundary),
}
});
let fut = filt.filter();
Box::new(fut)
}
}
impl fmt::Debug for FormData {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("FormData").finish()
}
}
impl Stream for FormData {
type Item = Part;
type Error = ::Error;
fn poll(&mut self) -> Poll<Option<Self::Item>, Self::Error> {
match self.inner.read_entry() {
Ok(Some(mut field)) => {
let mut data = Vec::new();
field.data
.read_to_end(&mut data)
.map_err(::error::Kind::Multipart)?;
Ok(Async::Ready(Some(Part {
name: field.headers.name.to_string(),
filename: field.headers.filename,
content_type: field.headers.content_type.map(|m| m.to_string()),
data: Some(data),
})))
},
Ok(None) => Ok(Async::Ready(None)),
Err(e) => Err(::error::Kind::Multipart(e).into())
}
}
}
impl Part {
pub fn name(&self) -> &str {
&self.name
}
pub fn filename(&self) -> Option<&str> {
self.filename.as_ref().map(|s| &**s)
}
pub fn content_type(&self) -> Option<&str> {
self.content_type.as_ref().map(|s| &**s)
}
}
impl fmt::Debug for Part {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let mut builder = f.debug_struct("Part");
builder.field("name", &self.name);
if let Some(ref filename) = self.filename {
builder.field("filename", filename);
}
if let Some(ref mime) = self.content_type {
builder.field("content_type", mime);
}
builder.finish()
}
}
impl Stream for Part {
type Item = Vec<u8>;
type Error = ::Error;
fn poll(&mut self) -> Poll<Option<Self::Item>, Self::Error> {
Ok(Async::Ready(self.data.take()))
}
}