rama_http/layer/compression/
service.rs1use super::body::BodyInner;
2use super::predicate::{DefaultPredicate, Predicate};
3use super::CompressionBody;
4use super::CompressionLevel;
5use crate::dep::http_body::Body;
6use crate::layer::util::compression::WrapBody;
7use crate::layer::util::{compression::AcceptEncoding, content_encoding::Encoding};
8use crate::{header, Request, Response};
9use rama_core::{Context, Service};
10use rama_utils::macros::define_inner_service_accessors;
11
12pub struct Compression<S, P = DefaultPredicate> {
19 pub(crate) inner: S,
20 pub(crate) accept: AcceptEncoding,
21 pub(crate) predicate: P,
22 pub(crate) quality: CompressionLevel,
23}
24
25impl<S, P> std::fmt::Debug for Compression<S, P>
26where
27 S: std::fmt::Debug,
28 P: std::fmt::Debug,
29{
30 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
31 f.debug_struct("Compression")
32 .field("inner", &self.inner)
33 .field("accept", &self.accept)
34 .field("predicate", &self.predicate)
35 .field("quality", &self.quality)
36 .finish()
37 }
38}
39
40impl<S, P> Clone for Compression<S, P>
41where
42 S: Clone,
43 P: Clone,
44{
45 fn clone(&self) -> Self {
46 Self {
47 inner: self.inner.clone(),
48 accept: self.accept,
49 predicate: self.predicate.clone(),
50 quality: self.quality,
51 }
52 }
53}
54
55impl<S> Compression<S, DefaultPredicate> {
56 pub fn new(service: S) -> Compression<S, DefaultPredicate> {
58 Self {
59 inner: service,
60 accept: AcceptEncoding::default(),
61 predicate: DefaultPredicate::default(),
62 quality: CompressionLevel::default(),
63 }
64 }
65}
66
67impl<S, P> Compression<S, P> {
68 define_inner_service_accessors!();
69
70 pub fn gzip(mut self, enable: bool) -> Self {
72 self.accept.set_gzip(enable);
73 self
74 }
75
76 pub fn set_gzip(&mut self, enable: bool) -> &mut Self {
78 self.accept.set_gzip(enable);
79 self
80 }
81
82 pub fn deflate(mut self, enable: bool) -> Self {
84 self.accept.set_deflate(enable);
85 self
86 }
87
88 pub fn set_deflate(&mut self, enable: bool) -> &mut Self {
90 self.accept.set_deflate(enable);
91 self
92 }
93
94 pub fn br(mut self, enable: bool) -> Self {
96 self.accept.set_br(enable);
97 self
98 }
99
100 pub fn set_br(&mut self, enable: bool) -> &mut Self {
102 self.accept.set_br(enable);
103 self
104 }
105
106 pub fn zstd(mut self, enable: bool) -> Self {
108 self.accept.set_zstd(enable);
109 self
110 }
111
112 pub fn set_zstd(&mut self, enable: bool) -> &mut Self {
114 self.accept.set_zstd(enable);
115 self
116 }
117
118 pub fn quality(mut self, quality: CompressionLevel) -> Self {
120 self.quality = quality;
121 self
122 }
123
124 pub fn set_quality(&mut self, quality: CompressionLevel) -> &mut Self {
126 self.quality = quality;
127 self
128 }
129
130 pub fn compress_when<C>(self, predicate: C) -> Compression<S, C>
166 where
167 C: Predicate,
168 {
169 Compression {
170 inner: self.inner,
171 accept: self.accept,
172 predicate,
173 quality: self.quality,
174 }
175 }
176}
177
178impl<ReqBody, ResBody, S, P, State> Service<State, Request<ReqBody>> for Compression<S, P>
179where
180 S: Service<State, Request<ReqBody>, Response = Response<ResBody>>,
181 ResBody: Body<Data: Send + 'static, Error: Send + 'static> + Send + 'static,
182 P: Predicate + Send + Sync + 'static,
183 ReqBody: Send + 'static,
184 State: Clone + Send + Sync + 'static,
185{
186 type Response = Response<CompressionBody<ResBody>>;
187 type Error = S::Error;
188
189 #[allow(unreachable_code, unused_mut, unused_variables, unreachable_patterns)]
190 async fn serve(
191 &self,
192 ctx: Context<State>,
193 req: Request<ReqBody>,
194 ) -> Result<Self::Response, Self::Error> {
195 let encoding = Encoding::from_headers(req.headers(), self.accept);
196
197 let res = self.inner.serve(ctx, req).await?;
198
199 let should_compress = !res.headers().contains_key(header::CONTENT_ENCODING)
201 && !res.headers().contains_key(header::CONTENT_RANGE)
203 && self.predicate.should_compress(&res);
204
205 let (mut parts, body) = res.into_parts();
206
207 if should_compress {
208 parts
209 .headers
210 .append(header::VARY, header::ACCEPT_ENCODING.into());
211 }
212
213 let body = match (should_compress, encoding) {
214 (false, _) | (_, Encoding::Identity) => {
216 return Ok(Response::from_parts(
217 parts,
218 CompressionBody::new(BodyInner::identity(body)),
219 ))
220 }
221
222 (_, Encoding::Gzip) => {
223 CompressionBody::new(BodyInner::gzip(WrapBody::new(body, self.quality)))
224 }
225 (_, Encoding::Deflate) => {
226 CompressionBody::new(BodyInner::deflate(WrapBody::new(body, self.quality)))
227 }
228 (_, Encoding::Brotli) => {
229 CompressionBody::new(BodyInner::brotli(WrapBody::new(body, self.quality)))
230 }
231 (_, Encoding::Zstd) => {
232 CompressionBody::new(BodyInner::zstd(WrapBody::new(body, self.quality)))
233 }
234 #[allow(unreachable_patterns)]
235 (true, _) => {
236 return Ok(Response::from_parts(
251 parts,
252 CompressionBody::new(BodyInner::identity(body)),
253 ));
254 }
255 };
256
257 parts.headers.remove(header::ACCEPT_RANGES);
258 parts.headers.remove(header::CONTENT_LENGTH);
259
260 parts
261 .headers
262 .insert(header::CONTENT_ENCODING, encoding.into_header_value());
263
264 let res = Response::from_parts(parts, body);
265 Ok(res)
266 }
267}