1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172

use std::fmt;

use futures::{Stream, Poll, Async};
use bytes::Bytes;

/// An asynchronous `Stream`.
pub struct Body {
    inner: Inner,
}

enum Inner {
    Reusable(Bytes),
    Hyper(::hyper::Body),
}

impl Body {
    fn poll_inner(&mut self) -> &mut ::hyper::Body {
        match self.inner {
            Inner::Hyper(ref mut body) => body,
            Inner::Reusable(_) => unreachable!(),
        }
    }
}

impl Stream for Body {
    type Item = Chunk;
    type Error = ::Error;

    #[inline]
    fn poll(&mut self) -> Poll<Option<Self::Item>, Self::Error> {
        match try_!(self.poll_inner().poll()) {
            Async::Ready(opt) => Ok(Async::Ready(opt.map(|chunk| Chunk {
                inner: chunk,
            }))),
            Async::NotReady => Ok(Async::NotReady),
        }
    }
}

impl From<Bytes> for Body {
    #[inline]
    fn from(bytes: Bytes) -> Body {
        reusable(bytes)
    }
}

impl From<Vec<u8>> for Body {
    #[inline]
    fn from(vec: Vec<u8>) -> Body {
        reusable(vec.into())
    }
}

impl From<&'static [u8]> for Body {
    #[inline]
    fn from(s: &'static [u8]) -> Body {
        reusable(Bytes::from_static(s))
    }
}

impl From<String> for Body {
    #[inline]
    fn from(s: String) -> Body {
        reusable(s.into())
    }
}

impl From<&'static str> for Body {
    #[inline]
    fn from(s: &'static str) -> Body {
        s.as_bytes().into()
    }
}

/// A chunk of bytes for a `Body`.
///
/// A `Chunk` can be treated like `&[u8]`.
#[derive(Default)]
pub struct Chunk {
    inner: ::hyper::Chunk,
}

impl AsRef<[u8]> for Chunk {
    #[inline]
    fn as_ref(&self) -> &[u8] {
        &*self
    }
}

impl ::std::ops::Deref for Chunk {
    type Target = [u8];
    #[inline]
    fn deref(&self) -> &Self::Target {
        self.inner.as_ref()
    }
}

impl Extend<u8> for Chunk {
    fn extend<T>(&mut self, iter: T)
    where T: IntoIterator<Item=u8> {
        self.inner.extend(iter)
    }
}

impl IntoIterator for Chunk {
    type Item = u8;
    //XXX: exposing type from hyper!
    type IntoIter = <::hyper::Chunk as IntoIterator>::IntoIter;
    fn into_iter(self) -> Self::IntoIter {
        self.inner.into_iter()
    }
}

impl fmt::Debug for Body {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.debug_struct("Body")
            .finish()
    }
}

impl fmt::Debug for Chunk {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        fmt::Debug::fmt(&self.inner, f)
    }
}

// pub(crate)

#[inline]
pub fn wrap(body: ::hyper::Body) -> Body {
    Body {
        inner: Inner::Hyper(body),
    }
}

#[inline]
pub fn take(body: &mut Body) -> Body {
    use std::mem;
    let inner = mem::replace(&mut body.inner, Inner::Hyper(::hyper::Body::empty()));
    Body {
        inner: inner,
    }
}

#[inline]
pub fn empty() -> Body {
    Body {
        inner: Inner::Hyper(::hyper::Body::empty()),
    }
}

#[inline]
pub fn chunk(chunk: Bytes) -> Chunk {
    Chunk {
        inner: ::hyper::Chunk::from(chunk)
    }
}

#[inline]
pub fn reusable(chunk: Bytes) -> Body {
    Body {
        inner: Inner::Reusable(chunk),
    }
}

#[inline]
pub fn into_hyper(body: Body) -> (Option<Bytes>, ::hyper::Body) {
    match body.inner {
        Inner::Reusable(chunk) => (Some(chunk.clone()), chunk.into()),
        Inner::Hyper(b) => (None, b),
    }
}