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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
use std::convert::Infallible;
use std::net::SocketAddr;
use std::sync::{atomic::Ordering, Arc};
use anyhow::Result;
use log::*;
use accept_encoding_fork::Encoding;
use async_compression::tokio::bufread::*;
use futures::TryStreamExt;
use http::header::{HeaderName, HeaderValue};
use hyper::server::conn::Http;
use hyper::service::service_fn;
use hyper::{header, Body, Request, Response, StatusCode};
use tokio::net::TcpListener;
use tokio::sync::watch;
use tokio_rustls::TlsAcceptor;
use tokio_util::io::{ReaderStream, StreamReader};
use crate::cert_store::{CertStore, StoreResolver};
use crate::proxy_config::ProxyConfig;
use crate::reverse_proxy;
pub struct HttpsConfig {
pub bind_addr: SocketAddr,
pub enable_compression: bool,
pub compress_mime_types: Vec<String>,
}
pub async fn serve_https(
config: HttpsConfig,
cert_store: Arc<CertStore>,
rx_proxy_config: watch::Receiver<Arc<ProxyConfig>>,
) -> Result<()> {
let config = Arc::new(config);
let mut tls_cfg = rustls::ServerConfig::builder()
.with_safe_defaults()
.with_no_client_auth()
.with_cert_resolver(Arc::new(StoreResolver(cert_store)));
tls_cfg.alpn_protocols = vec![b"h2".to_vec(), b"http/1.1".to_vec()];
let tls_acceptor = Arc::new(TlsAcceptor::from(Arc::new(tls_cfg)));
info!("Starting to serve on https://{}.", config.bind_addr);
let tcp = TcpListener::bind(config.bind_addr).await?;
loop {
let (socket, remote_addr) = tcp.accept().await?;
let rx_proxy_config = rx_proxy_config.clone();
let tls_acceptor = tls_acceptor.clone();
let config = config.clone();
tokio::spawn(async move {
match tls_acceptor.accept(socket).await {
Ok(stream) => {
debug!("TLS handshake was successfull");
let http_result = Http::new()
.serve_connection(
stream,
service_fn(move |req: Request<Body>| {
let https_config = config.clone();
let proxy_config: Arc<ProxyConfig> =
rx_proxy_config.borrow().clone();
handle_outer(remote_addr, req, https_config, proxy_config)
}),
)
.await;
if let Err(http_err) = http_result {
warn!("HTTP error: {}", http_err);
}
}
Err(e) => warn!("Error in TLS connection: {}", e),
}
});
}
}
async fn handle_outer(
remote_addr: SocketAddr,
req: Request<Body>,
https_config: Arc<HttpsConfig>,
proxy_config: Arc<ProxyConfig>,
) -> Result<Response<Body>, Infallible> {
match handle(remote_addr, req, https_config, proxy_config).await {
Err(e) => {
warn!("Handler error: {}", e);
Ok(Response::builder()
.status(StatusCode::INTERNAL_SERVER_ERROR)
.body(Body::from(format!("{}", e)))
.unwrap())
}
Ok(r) => Ok(r),
}
}
// Custom echo service, handling two different routes and a
// catch-all 404 responder.
async fn handle(
remote_addr: SocketAddr,
req: Request<Body>,
https_config: Arc<HttpsConfig>,
proxy_config: Arc<ProxyConfig>,
) -> Result<Response<Body>, anyhow::Error> {
let method = req.method().clone();
let uri = req.uri().to_string();
let host = if let Some(auth) = req.uri().authority() {
auth.as_str()
} else {
req.headers()
.get("host")
.ok_or_else(|| anyhow!("Missing host header"))?
.to_str()?
};
let path = req.uri().path();
let accept_encoding = accept_encoding_fork::parse(req.headers()).unwrap_or(None);
let best_match = proxy_config
.entries
.iter()
.filter(|ent| {
ent.host.matches(host)
&& ent
.path_prefix
.as_ref()
.map(|prefix| path.starts_with(prefix))
.unwrap_or(true)
})
.max_by_key(|ent| {
(
ent.priority,
ent.path_prefix
.as_ref()
.map(|x| x.len() as i32)
.unwrap_or(0),
-ent.calls.load(Ordering::SeqCst),
)
});
if let Some(proxy_to) = best_match {
proxy_to.calls.fetch_add(1, Ordering::SeqCst);
debug!("{}{} -> {}", host, path, proxy_to);
trace!("Request: {:?}", req);
let mut response = if proxy_to.https_target {
let to_addr = format!("https://{}", proxy_to.target_addr);
reverse_proxy::call_https(remote_addr.ip(), &to_addr, req).await?
} else {
let to_addr = format!("http://{}", proxy_to.target_addr);
reverse_proxy::call(remote_addr.ip(), &to_addr, req).await?
};
for (header, value) in proxy_to.add_headers.iter() {
response.headers_mut().insert(
HeaderName::from_bytes(header.as_bytes())?,
HeaderValue::from_str(value)?,
);
}
trace!("Response: {:?}", response);
info!("{} {} {}", method, response.status().as_u16(), uri);
if https_config.enable_compression {
try_compress(response, accept_encoding, &https_config)
} else {
Ok(response)
}
} else {
debug!("{}{} -> NOT FOUND", host, path);
info!("{} 404 {}", method, uri);
Ok(Response::builder()
.status(StatusCode::NOT_FOUND)
.body(Body::from("No matching proxy entry"))?)
}
}
fn try_compress(
response: Response<Body>,
accept_encoding: Option<Encoding>,
https_config: &HttpsConfig,
) -> Result<Response<Body>> {
// Check if a compression encoding is accepted
let encoding = match accept_encoding {
None | Some(Encoding::Identity) => return Ok(response),
Some(enc) => enc,
};
// If already compressed, return as is
if response.headers().get(header::CONTENT_ENCODING).is_some() {
return Ok(response);
}
// If content type not in mime types for which to compress, return as is
match response.headers().get(header::CONTENT_TYPE) {
Some(ct) => {
let ct_str = ct.to_str()?;
if !https_config.compress_mime_types.iter().any(|x| x == ct_str) {
return Ok(response);
}
}
None => return Ok(response),
};
debug!("Compressing response body as {:?}", encoding);
let (mut head, body) = response.into_parts();
let body_rd =
StreamReader::new(body.map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e)));
let compressed_body = match encoding {
Encoding::Gzip => {
head.headers
.insert(header::CONTENT_ENCODING, "gzip".parse()?);
Body::wrap_stream(ReaderStream::new(GzipEncoder::new(body_rd)))
}
Encoding::Brotli => {
head.headers.insert(header::CONTENT_ENCODING, "br".parse()?);
Body::wrap_stream(ReaderStream::new(BrotliEncoder::new(body_rd)))
}
Encoding::Deflate => {
head.headers
.insert(header::CONTENT_ENCODING, "deflate".parse()?);
Body::wrap_stream(ReaderStream::new(DeflateEncoder::new(body_rd)))
}
Encoding::Zstd => {
head.headers
.insert(header::CONTENT_ENCODING, "zstd".parse()?);
Body::wrap_stream(ReaderStream::new(ZstdEncoder::new(body_rd)))
}
_ => unreachable!(),
};
Ok(Response::from_parts(head, compressed_body))
}
|
