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
use language_tags::LanguageTag;
use std::str;
use std::str::FromStr;
use std::fmt::{self, Display};
use url::percent_encoding;
use header::shared::Charset;
pub fn from_one_raw_str<T: str::FromStr>(raw: &[Vec<u8>]) -> ::Result<T> {
if raw.len() != 1 || unsafe { raw.get_unchecked(0) } == b"" { return Err(::Error::Header) }
from_raw_str(& unsafe { raw.get_unchecked(0) })
}
pub fn from_raw_str<T: str::FromStr>(raw: &[u8]) -> ::Result<T> {
let s = try!(str::from_utf8(raw));
T::from_str(s).or(Err(::Error::Header))
}
#[inline]
pub fn from_comma_delimited<T: str::FromStr, S: AsRef<[u8]>>(raw: &[S]) -> ::Result<Vec<T>> {
let mut result = Vec::new();
for s in raw {
let s = try!(str::from_utf8(s.as_ref()));
result.extend(s.split(',')
.filter_map(|x| match x.trim() {
"" => None,
y => Some(y)
})
.filter_map(|x| x.parse().ok()))
}
Ok(result)
}
pub fn fmt_comma_delimited<T: Display>(f: &mut fmt::Formatter, parts: &[T]) -> fmt::Result {
for (i, part) in parts.iter().enumerate() {
if i != 0 {
try!(f.write_str(", "));
}
try!(Display::fmt(part, f));
}
Ok(())
}
#[derive(Clone, Debug, PartialEq)]
pub struct ExtendedValue {
pub charset: Charset,
pub language_tag: Option<LanguageTag>,
pub value: Vec<u8>,
}
pub fn parse_extended_value(val: &str) -> ::Result<ExtendedValue> {
let mut parts = val.splitn(3,'\'');
let charset: Charset = match parts.next() {
None => return Err(::Error::Header),
Some(n) => try!(FromStr::from_str(n)),
};
let lang: Option<LanguageTag> = match parts.next() {
None => return Err(::Error::Header),
Some("") => None,
Some(s) => match s.parse() {
Ok(lt) => Some(lt),
Err(_) => return Err(::Error::Header),
}
};
let value: Vec<u8> = match parts.next() {
None => return Err(::Error::Header),
Some(v) => percent_encoding::percent_decode(v.as_bytes()).collect(),
};
Ok(ExtendedValue {
charset: charset,
language_tag: lang,
value: value,
})
}
define_encode_set! {
pub HTTP_VALUE = [percent_encoding::SIMPLE_ENCODE_SET] | {
' ', '"', '%', '\'', '(', ')', '*', ',', '/', ':', ';', '<', '-', '>', '?',
'[', '\\', ']', '{', '}'
}
}
impl Display for ExtendedValue {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let encoded_value =
percent_encoding::percent_encode(&self.value[..], HTTP_VALUE);
if let Some(ref lang) = self.language_tag {
write!(f, "{}'{}'{}", self.charset, lang, encoded_value)
} else {
write!(f, "{}''{}", self.charset, encoded_value)
}
}
}
#[cfg(test)]
mod tests {
use header::shared::Charset;
use super::{ExtendedValue, parse_extended_value};
#[test]
fn test_parse_extended_value_with_encoding_and_language_tag() {
let expected_language_tag = langtag!(en);
let result = parse_extended_value("iso-8859-1'en'%A3%20rates");
assert!(result.is_ok());
let extended_value = result.unwrap();
assert_eq!(Charset::Iso_8859_1, extended_value.charset);
assert!(extended_value.language_tag.is_some());
assert_eq!(expected_language_tag, extended_value.language_tag.unwrap());
assert_eq!(vec![163, b' ', b'r', b'a', b't', b'e', b's'], extended_value.value);
}
#[test]
fn test_parse_extended_value_with_encoding() {
let result = parse_extended_value("UTF-8''%c2%a3%20and%20%e2%82%ac%20rates");
assert!(result.is_ok());
let extended_value = result.unwrap();
assert_eq!(Charset::Ext("UTF-8".to_string()), extended_value.charset);
assert!(extended_value.language_tag.is_none());
assert_eq!(vec![194, 163, b' ', b'a', b'n', b'd', b' ', 226, 130, 172, b' ', b'r', b'a', b't', b'e', b's'], extended_value.value);
}
#[test]
fn test_parse_extended_value_missing_language_tag_and_encoding() {
let result = parse_extended_value("foo%20bar.html");
assert!(result.is_err());
}
#[test]
fn test_parse_extended_value_partially_formatted() {
let result = parse_extended_value("UTF-8'missing third part");
assert!(result.is_err());
}
#[test]
fn test_parse_extended_value_partially_formatted_blank() {
let result = parse_extended_value("blank second part'");
assert!(result.is_err());
}
#[test]
fn test_fmt_extended_value_with_encoding_and_language_tag() {
let extended_value = ExtendedValue {
charset: Charset::Iso_8859_1,
language_tag: Some("en".parse().expect("Could not parse language tag")),
value: vec![163, b' ', b'r', b'a', b't', b'e', b's'],
};
assert_eq!("ISO-8859-1'en'%A3%20rates", format!("{}", extended_value));
}
#[test]
fn test_fmt_extended_value_with_encoding() {
let extended_value = ExtendedValue {
charset: Charset::Ext("UTF-8".to_string()),
language_tag: None,
value: vec![194, 163, b' ', b'a', b'n', b'd', b' ', 226, 130, 172, b' ', b'r', b'a',
b't', b'e', b's'],
};
assert_eq!("UTF-8''%C2%A3%20and%20%E2%82%AC%20rates",
format!("{}", extended_value));
}
}