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
237
238
239
use std::path::{PathBuf, Path};
use std::fs;
use std::error::Error;
use std::fmt;
#[cfg(feature = "cache")]
use time::{self, Timespec};
#[cfg(feature = "cache")]
use std::time::Duration;
use iron::prelude::*;
use iron::{Handler, Url, status};
#[cfg(feature = "cache")]
use iron::modifier::Modifier;
use iron::modifiers::Redirect;
use mount::OriginalUrl;
use requested_path::RequestedPath;
use url;
#[derive(Clone)]
pub struct Static {
pub root: PathBuf,
#[cfg(feature = "cache")]
cache: Option<Cache>,
}
impl Static {
#[cfg(feature = "cache")]
pub fn new<P: Into<PathBuf>>(root: P) -> Static {
Static {
root: root.into(),
cache: None
}
}
#[cfg(not(feature = "cache"))]
pub fn new<P: Into<PathBuf>>(root: P) -> Static {
Static {
root: root.into(),
}
}
#[cfg(feature = "cache")]
pub fn cache(self, duration: Duration) -> Static {
self.set(Cache::new(duration))
}
#[cfg(feature = "cache")]
fn try_cache<P: AsRef<Path>>(&self, req: &mut Request, path: P) -> IronResult<Response> {
match self.cache {
None => Ok(Response::with((status::Ok, path.as_ref()))),
Some(ref cache) => cache.handle(req, path.as_ref()),
}
}
}
impl Handler for Static {
fn handle(&self, req: &mut Request) -> IronResult<Response> {
use std::io;
let requested_path = RequestedPath::new(&self.root, req);
let metadata = match fs::metadata(&requested_path.path) {
Ok(meta) => meta,
Err(e) => {
let status = match e.kind() {
io::ErrorKind::NotFound => status::NotFound,
io::ErrorKind::PermissionDenied => status::Forbidden,
_ => status::InternalServerError,
};
return Err(IronError::new(e, status))
},
};
if requested_path.should_redirect(&metadata, req) {
let mut original_url: url::Url = match req.extensions.get::<OriginalUrl>() {
None => &req.url,
Some(original_url) => original_url,
}.clone().into();
original_url.path_segments_mut().unwrap().push("");
let redirect_path = Url::from_generic_url(original_url).unwrap();
return Ok(Response::with((status::MovedPermanently,
format!("Redirecting to {}", redirect_path),
Redirect(redirect_path))));
}
match requested_path.get_file(&metadata) {
None => Err(IronError::new(NoFile, status::NotFound)),
#[cfg(feature = "cache")]
Some(path) => self.try_cache(req, path),
#[cfg(not(feature = "cache"))]
Some(path) => {
let path: &Path = &path;
Ok(Response::with((status::Ok, path)))
},
}
}
}
impl Set for Static {}
#[cfg(feature = "cache")]
#[derive(Clone)]
pub struct Cache {
pub duration: Duration,
}
#[cfg(feature = "cache")]
impl Cache {
pub fn new(duration: Duration) -> Cache {
Cache { duration: duration }
}
fn handle<P: AsRef<Path>>(&self, req: &mut Request, path: P) -> IronResult<Response> {
use iron::headers::{IfModifiedSince, HttpDate};
let path = path.as_ref();
let (size, last_modified_time) = match fs::metadata(path) {
Err(error) => return Err(IronError::new(error, status::InternalServerError)),
Ok(metadata) => {
use filetime::FileTime;
let time = FileTime::from_last_modification_time(&metadata);
(metadata.len(), Timespec::new(time.seconds() as i64, 0))
},
};
let if_modified_since = match req.headers.get::<IfModifiedSince>().cloned() {
None => return self.response_with_cache(req, path, size, last_modified_time),
Some(IfModifiedSince(HttpDate(time))) => time.to_timespec(),
};
if last_modified_time <= if_modified_since {
Ok(Response::with(status::NotModified))
} else {
self.response_with_cache(req, path, size, last_modified_time)
}
}
fn response_with_cache<P: AsRef<Path>>(&self,
req: &mut Request,
path: P,
size: u64,
modified: Timespec) -> IronResult<Response> {
use iron::headers::{CacheControl, LastModified, CacheDirective, HttpDate};
use iron::headers::{ContentLength, ContentType, ETag, EntityTag};
use iron::method::Method;
use iron::mime::{Mime, TopLevel, SubLevel};
use iron::modifiers::Header;
let seconds = self.duration.as_secs() as u32;
let cache = vec![CacheDirective::Public, CacheDirective::MaxAge(seconds)];
let metadata = fs::metadata(path.as_ref());
let metadata = try!(metadata.map_err(|e| IronError::new(e, status::InternalServerError)));
let mut response = if req.method == Method::Head {
let has_ct = req.headers.get::<ContentType>();
let cont_type = match has_ct {
None => ContentType(Mime(TopLevel::Text, SubLevel::Plain, vec![])),
Some(t) => t.clone()
};
Response::with((status::Ok, Header(cont_type), Header(ContentLength(metadata.len()))))
} else {
Response::with((status::Ok, path.as_ref()))
};
response.headers.set(CacheControl(cache));
response.headers.set(LastModified(HttpDate(time::at(modified))));
response.headers.set(ETag(EntityTag::weak(format!("{0:x}-{1:x}.{2:x}", size, modified.sec, modified.nsec))));
Ok(response)
}
}
#[cfg(feature = "cache")]
impl Modifier<Static> for Cache {
fn modify(self, static_handler: &mut Static) {
static_handler.cache = Some(self);
}
}
#[derive(Debug)]
pub struct NoFile;
impl Error for NoFile {
fn description(&self) -> &str { "File not found" }
}
impl fmt::Display for NoFile {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str(self.description())
}
}