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
extern crate accept_language;
pub extern crate rocket;
pub extern crate tinystr;
pub extern crate unic_langid;
pub extern crate unic_langid_macros;
mod macros;
use unic_langid::parser::parse_language_identifier;
use unic_langid::subtags::{Language, Region};
pub use unic_langid::LanguageIdentifier;
use rocket::outcome::Outcome;
use rocket::request::{self, FromRequest, Request};
#[derive(Debug, Clone)]
pub struct AcceptLanguage {
pub accept_language: Vec<LanguageIdentifier>,
}
#[inline]
fn from_request(request: &Request<'_>) -> AcceptLanguage {
let raw_accept_language: Option<&str> = request.headers().get("accept-language").next();
let accept_language = raw_accept_language
.map(|raw_accept_language| {
accept_language::parse(raw_accept_language)
.iter()
.filter_map(|al| parse_language_identifier(al.as_bytes()).ok())
.collect()
})
.unwrap_or_else(Vec::new);
AcceptLanguage {
accept_language,
}
}
#[rocket::async_trait]
impl<'r> FromRequest<'r> for AcceptLanguage {
type Error = ();
async fn from_request(request: &'r Request<'_>) -> request::Outcome<Self, Self::Error> {
Outcome::Success(from_request(request))
}
}
#[rocket::async_trait]
impl<'r> FromRequest<'r> for &'r AcceptLanguage {
type Error = ();
async fn from_request(request: &'r Request<'_>) -> request::Outcome<Self, Self::Error> {
Outcome::Success(request.local_cache(|| from_request(request)))
}
}
impl AcceptLanguage {
pub fn get_first_region(&self) -> Option<Region> {
for locale in &self.accept_language {
let region = locale.region;
if region.is_some() {
return region;
}
}
None
}
pub fn get_first_language(&self) -> Option<Language> {
self.accept_language.get(0).map(|locale| locale.language)
}
pub fn get_first_language_region(&self) -> Option<(Language, Option<Region>)> {
if let Some(locale) = self.accept_language.get(0) {
let language = locale.language;
let region = locale.region;
Some((language, region))
} else {
None
}
}
pub fn get_appropriate_language_region(
&self,
locales: &[LanguageIdentifier],
) -> Option<(Language, Option<Region>)> {
let mut filtered_language = None;
for locale in &self.accept_language {
let language = locale.language;
for t_locale in locales {
let t_language = t_locale.language;
if language == t_language {
let region = locale.region;
let t_region = t_locale.region;
if region == t_region {
return Some((language, region));
} else if filtered_language.is_none() {
filtered_language = Some((language, None));
}
}
}
}
filtered_language
}
}