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
173
174
175
176
177
178
179
180
181
182
183
use std::time;
use actix_codec::{AsyncRead, AsyncWrite};
use bytes::Bytes;
use futures::future::{err, Either};
use futures::{Async, Future, Poll};
use h2::{client::SendRequest, SendStream};
use http::header::{HeaderValue, CONNECTION, CONTENT_LENGTH, TRANSFER_ENCODING};
use http::{request::Request, HttpTryFrom, Method, Version};
use crate::body::{BodySize, MessageBody};
use crate::message::{RequestHead, ResponseHead};
use crate::payload::Payload;
use super::connection::{ConnectionType, IoConnection};
use super::error::SendRequestError;
use super::pool::Acquired;
pub(crate) fn send_request<T, B>(
io: SendRequest<Bytes>,
head: RequestHead,
body: B,
created: time::Instant,
pool: Option<Acquired<T>>,
) -> impl Future<Item = (ResponseHead, Payload), Error = SendRequestError>
where
T: AsyncRead + AsyncWrite + 'static,
B: MessageBody,
{
trace!("Sending client request: {:?} {:?}", head, body.size());
let head_req = head.method == Method::HEAD;
let length = body.size();
let eof = match length {
BodySize::None | BodySize::Empty | BodySize::Sized(0) => true,
_ => false,
};
io.ready()
.map_err(SendRequestError::from)
.and_then(move |mut io| {
let mut req = Request::new(());
*req.uri_mut() = head.uri;
*req.method_mut() = head.method;
*req.version_mut() = Version::HTTP_2;
let mut skip_len = true;
let _ = match length {
BodySize::None => None,
BodySize::Stream => {
skip_len = false;
None
}
BodySize::Empty => req
.headers_mut()
.insert(CONTENT_LENGTH, HeaderValue::from_static("0")),
BodySize::Sized(len) => req.headers_mut().insert(
CONTENT_LENGTH,
HeaderValue::try_from(format!("{}", len)).unwrap(),
),
BodySize::Sized64(len) => req.headers_mut().insert(
CONTENT_LENGTH,
HeaderValue::try_from(format!("{}", len)).unwrap(),
),
};
for (key, value) in head.headers.iter() {
match *key {
CONNECTION | TRANSFER_ENCODING => continue,
CONTENT_LENGTH if skip_len => continue,
_ => (),
}
req.headers_mut().append(key, value.clone());
}
match io.send_request(req, eof) {
Ok((res, send)) => {
release(io, pool, created, false);
if !eof {
Either::A(Either::B(
SendBody {
body,
send,
buf: None,
}
.and_then(move |_| res.map_err(SendRequestError::from)),
))
} else {
Either::B(res.map_err(SendRequestError::from))
}
}
Err(e) => {
release(io, pool, created, e.is_io());
Either::A(Either::A(err(e.into())))
}
}
})
.and_then(move |resp| {
let (parts, body) = resp.into_parts();
let payload = if head_req { Payload::None } else { body.into() };
let mut head = ResponseHead::new(parts.status);
head.version = parts.version;
head.headers = parts.headers.into();
Ok((head, payload))
})
.from_err()
}
struct SendBody<B: MessageBody> {
body: B,
send: SendStream<Bytes>,
buf: Option<Bytes>,
}
impl<B: MessageBody> Future for SendBody<B> {
type Item = ();
type Error = SendRequestError;
fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
loop {
if self.buf.is_none() {
match self.body.poll_next() {
Ok(Async::Ready(Some(buf))) => {
self.send.reserve_capacity(buf.len());
self.buf = Some(buf);
}
Ok(Async::Ready(None)) => {
if let Err(e) = self.send.send_data(Bytes::new(), true) {
return Err(e.into());
}
self.send.reserve_capacity(0);
return Ok(Async::Ready(()));
}
Ok(Async::NotReady) => return Ok(Async::NotReady),
Err(e) => return Err(e.into()),
}
}
match self.send.poll_capacity() {
Ok(Async::NotReady) => return Ok(Async::NotReady),
Ok(Async::Ready(None)) => return Ok(Async::Ready(())),
Ok(Async::Ready(Some(cap))) => {
let mut buf = self.buf.take().unwrap();
let len = buf.len();
let bytes = buf.split_to(std::cmp::min(cap, len));
if let Err(e) = self.send.send_data(bytes, false) {
return Err(e.into());
} else {
if !buf.is_empty() {
self.send.reserve_capacity(buf.len());
self.buf = Some(buf);
}
continue;
}
}
Err(e) => return Err(e.into()),
}
}
}
}
fn release<T: AsyncRead + AsyncWrite + 'static>(
io: SendRequest<Bytes>,
pool: Option<Acquired<T>>,
created: time::Instant,
close: bool,
) {
if let Some(mut pool) = pool {
if close {
pool.close(IoConnection::new(ConnectionType::H2(io), created, None));
} else {
pool.release(IoConnection::new(ConnectionType::H2(io), created, None));
}
}
}