http 1.4.0

A set of types for representing HTTP requests and responses.
Documentation 
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

//! HTTP header types
//!
//! The module provides [`HeaderName`], [`HeaderMap`], and a number of types
//! used for interacting with `HeaderMap`. These types allow representing both
//! HTTP/1 and HTTP/2 headers.
//!
//! # `HeaderName`
//!
//! The `HeaderName` type represents both standard header names as well as
//! custom header names. The type handles the case insensitive nature of header
//! names and is used as the key portion of `HeaderMap`. Header names are
//! normalized to lower case. In other words, when creating a `HeaderName` with
//! a string, even if upper case characters are included, when getting a string
//! representation of the `HeaderName`, it will be all lower case. This allows
//! for faster `HeaderMap` comparison operations.
//!
//! The internal representation is optimized to efficiently handle the cases
//! most commonly encountered when working with HTTP. Standard header names are
//! special cased and are represented internally as an enum. Short custom
//! headers will be stored directly in the `HeaderName` struct and will not
//! incur any allocation overhead, however longer strings will require an
//! allocation for storage.
//!
//! ## Limitations
//!
//! `HeaderName` has a max length of 32,768 for header names. Attempting to
//! parse longer names will result in a panic.
//!
//! # `HeaderMap`
//!
//! The [`HeaderMap`] type is a specialized
//! [multimap](<https://en.wikipedia.org/wiki/Multimap>) structure for storing
//! header names and values. It is designed specifically for efficient
//! manipulation of HTTP headers. It supports multiple values per header name
//! and provides specialized APIs for insertion, retrieval, and iteration.
//!
//! [*See also the `HeaderMap` type.*](HeaderMap)

mod map;
mod name;
mod value;

pub use self::map::{
    AsHeaderName, Drain, Entry, GetAll, HeaderMap, IntoHeaderName, IntoIter, Iter, IterMut, Keys,
    MaxSizeReached, OccupiedEntry, VacantEntry, ValueDrain, ValueIter, ValueIterMut, Values,
    ValuesMut,
};
pub use self::name::{HeaderName, InvalidHeaderName};
pub use self::value::{HeaderValue, InvalidHeaderValue, ToStrError};

// Use header name constants
#[rustfmt::skip]
pub use self::name::{
    ACCEPT,
    ACCEPT_CHARSET,
    ACCEPT_ENCODING,
    ACCEPT_LANGUAGE,
    ACCEPT_RANGES,
    ACCESS_CONTROL_ALLOW_CREDENTIALS,
    ACCESS_CONTROL_ALLOW_HEADERS,
    ACCESS_CONTROL_ALLOW_METHODS,
    ACCESS_CONTROL_ALLOW_ORIGIN,
    ACCESS_CONTROL_EXPOSE_HEADERS,
    ACCESS_CONTROL_MAX_AGE,
    ACCESS_CONTROL_REQUEST_HEADERS,
    ACCESS_CONTROL_REQUEST_METHOD,
    AGE,
    ALLOW,
    ALT_SVC,
    AUTHORIZATION,
    CACHE_CONTROL,
    CACHE_STATUS,
    CDN_CACHE_CONTROL,
    CONNECTION,
    CONTENT_DISPOSITION,
    CONTENT_ENCODING,
    CONTENT_LANGUAGE,
    CONTENT_LENGTH,
    CONTENT_LOCATION,
    CONTENT_RANGE,
    CONTENT_SECURITY_POLICY,
    CONTENT_SECURITY_POLICY_REPORT_ONLY,
    CONTENT_TYPE,
    COOKIE,
    DNT,
    DATE,
    ETAG,
    EXPECT,
    EXPIRES,
    FORWARDED,
    FROM,
    HOST,
    IF_MATCH,
    IF_MODIFIED_SINCE,
    IF_NONE_MATCH,
    IF_RANGE,
    IF_UNMODIFIED_SINCE,
    LAST_MODIFIED,
    LINK,
    LOCATION,
    MAX_FORWARDS,
    ORIGIN,
    PRAGMA,
    PROXY_AUTHENTICATE,
    PROXY_AUTHORIZATION,
    PUBLIC_KEY_PINS,
    PUBLIC_KEY_PINS_REPORT_ONLY,
    RANGE,
    REFERER,
    REFERRER_POLICY,
    REFRESH,
    RETRY_AFTER,
    SEC_WEBSOCKET_ACCEPT,
    SEC_WEBSOCKET_EXTENSIONS,
    SEC_WEBSOCKET_KEY,
    SEC_WEBSOCKET_PROTOCOL,
    SEC_WEBSOCKET_VERSION,
    SERVER,
    SET_COOKIE,
    STRICT_TRANSPORT_SECURITY,
    TE,
    TRAILER,
    TRANSFER_ENCODING,
    UPGRADE,
    UPGRADE_INSECURE_REQUESTS,
    USER_AGENT,
    VARY,
    VIA,
    WARNING,
    WWW_AUTHENTICATE,
    X_CONTENT_TYPE_OPTIONS,
    X_DNS_PREFETCH_CONTROL,
    X_FRAME_OPTIONS,
    X_XSS_PROTECTION,
};

/// Maximum length of a header name
///
/// Generally, 64kb for a header name is WAY too much than would ever be needed
/// in practice. Restricting it to this size enables using `u16` values to
/// represent offsets when dealing with header names.
const MAX_HEADER_NAME_LEN: usize = (1 << 16) - 1;