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wrap LanguageTags type in new AnyOrSome type to support wildcards (#2480)

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Rob Ede 2021-12-02 13:59:25 +00:00 committed by GitHub
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9 changed files with 469 additions and 136 deletions
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11
CHANGES.md
View file

@ -1,6 +1,17 @@
# Changes
## Unreleased - 2021-xx-xx
### Added
* Methods on `AcceptLanguage`: `ranked` and `preference`. [#2480]
### Changed
* Rename `Accept::{mime_precedence => ranked}`. [#2480]
* Rename `Accept::{mime_preference => preference}`. [#2480]
### Fixed
* Accept wildcard `*` items in `AcceptLanguage`. [#2480]
[#2480]: https://github.com/actix/actix-web/pull/2480
## 4.0.0-beta.13 - 2021-11-30

2
actix-http/src/header/mod.rs
View file

@ -55,7 +55,7 @@ pub trait Header: IntoHeaderValue {
fn name() -> HeaderName;
/// Parse a header
fn parse<T: HttpMessage>(msg: &T) -> Result<Self, ParseError>;
fn parse<M: HttpMessage>(msg: &M) -> Result<Self, ParseError>;
}
/// Convert `http::HeaderMap` to our `HeaderMap`.

15
actix-http/src/header/shared/quality_item.rs
View file

@ -1,8 +1,7 @@
use std::{
cmp,
convert::{TryFrom, TryInto},
fmt,
str::{self, FromStr},
fmt, str,
};
use derive_more::{Display, Error};
@ -83,16 +82,17 @@ impl TryFrom<f32> for Quality {
/// in [RFC 7231 §5.3.1](https://datatracker.ietf.org/doc/html/rfc7231#section-5.3.1).
#[derive(Clone, PartialEq, Debug)]
pub struct QualityItem<T> {
/// The actual contents of the field.
/// The wrapped contents of the field.
pub item: T,
/// The quality (client or server preference) for the value.
pub quality: Quality,
}
impl<T> QualityItem<T> {
/// Creates a new `QualityItem` from an item and a quality.
/// The item can be of any type.
/// The quality should be a value in the range [0, 1].
/// Constructs a new `QualityItem` from an item and a quality value.
///
/// The item can be of any type. The quality should be a value in the range [0, 1].
pub fn new(item: T, quality: Quality) -> QualityItem<T> {
QualityItem { item, quality }
}
@ -116,7 +116,7 @@ impl<T: fmt::Display> fmt::Display for QualityItem<T> {
}
}
impl<T: FromStr> FromStr for QualityItem<T> {
impl<T: str::FromStr> str::FromStr for QualityItem<T> {
type Err = ParseError;
fn from_str(qitem_str: &str) -> Result<Self, Self::Err> {
@ -128,6 +128,7 @@ impl<T: FromStr> FromStr for QualityItem<T> {
let mut raw_item = qitem_str;
let mut quality = 1f32;
// TODO: MSRV(1.52): use rsplit_once
let parts: Vec<_> = qitem_str.rsplitn(2, ';').map(str::trim).collect();
if parts.len() == 2 {

31
actix-http/src/header/utils.rs
View file

@ -12,7 +12,8 @@ where
I: Iterator<Item = &'a HeaderValue> + 'a,
T: FromStr,
{
let mut result = Vec::new();
let size_guess = all.size_hint().1.unwrap_or(2);
let mut result = Vec::with_capacity(size_guess);
for h in all {
let s = h.to_str().map_err(|_| ParseError::Header)?;
@ -26,6 +27,7 @@ where
.filter_map(|x| x.trim().parse().ok()),
)
}
Ok(result)
}
@ -34,10 +36,12 @@ where
pub fn from_one_raw_str<T: FromStr>(val: Option<&HeaderValue>) -> Result<T, ParseError> {
if let Some(line) = val {
let line = line.to_str().map_err(|_| ParseError::Header)?;
if !line.is_empty() {
return T::from_str(line).or(Err(ParseError::Header));
}
}
Err(ParseError::Header)
}
@ -48,13 +52,16 @@ where
T: fmt::Display,
{
let mut iter = parts.iter();
if let Some(part) = iter.next() {
fmt::Display::fmt(part, f)?;
}
for part in iter {
f.write_str(", ")?;
fmt::Display::fmt(part, f)?;
}
Ok(())
}
@ -65,3 +72,25 @@ pub fn http_percent_encode(f: &mut fmt::Formatter<'_>, bytes: &[u8]) -> fmt::Res
let encoded = percent_encoding::percent_encode(bytes, HTTP_VALUE);
fmt::Display::fmt(&encoded, f)
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn comma_delimited_parsing() {
let headers = vec![];
let res: Vec<usize> = from_comma_delimited(headers.iter()).unwrap();
assert_eq!(res, vec![0; 0]);
let headers = vec![
HeaderValue::from_static(""),
HeaderValue::from_static(","),
HeaderValue::from_static(" "),
HeaderValue::from_static("1 ,"),
HeaderValue::from_static(""),
];
let res: Vec<usize> = from_comma_delimited(headers.iter()).unwrap();
assert_eq!(res, vec![1]);
}
}

51
src/http/header/accept.rs
View file

@ -77,7 +77,7 @@ crate::http::header::common_header! {
/// ])
/// );
/// ```
(Accept, header::ACCEPT) => (QualityItem<Mime>)+
(Accept, header::ACCEPT) => (QualityItem<Mime>)*
test_parse_and_format {
// Tests from the RFC
@ -88,6 +88,7 @@ crate::http::header::common_header! {
QualityItem::new("audio/*".parse().unwrap(), q(200)),
qitem("audio/basic".parse().unwrap()),
])));
crate::http::header::common_header_test!(
test2,
vec![b"text/plain; q=0.5, text/html, text/x-dvi; q=0.8, text/x-c"],
@ -99,6 +100,7 @@ crate::http::header::common_header! {
q(800)),
qitem("text/x-c".parse().unwrap()),
])));
// Custom tests
crate::http::header::common_header_test!(
test3,
@ -154,7 +156,11 @@ impl Accept {
/// [q-factor weighting] and specificity.
///
/// [q-factor weighting]: https://datatracker.ietf.org/doc/html/rfc7231#section-5.3.2
pub fn mime_precedence(&self) -> Vec<Mime> {
pub fn ranked(&self) -> Vec<Mime> {
if self.is_empty() {
return vec![];
}
let mut types = self.0.clone();
// use stable sort so items with equal q-factor and specificity retain listed order
@ -201,12 +207,29 @@ impl Accept {
/// If no q-factors are provided, the first mime type is chosen. Note that items without
/// q-factors are given the maximum preference value.
///
/// Returns `None` if contained list is empty.
/// As per the spec, will return [`Mime::STAR_STAR`] (indicating no preference) if the contained
/// list is empty.
///
/// [q-factor weighting]: https://datatracker.ietf.org/doc/html/rfc7231#section-5.3.2
pub fn mime_preference(&self) -> Option<Mime> {
let types = self.mime_precedence();
types.first().cloned()
pub fn preference(&self) -> Mime {
use actix_http::header::q;
let mut max_item = None;
let mut max_pref = q(0);
// uses manual max lookup loop since we want the first occurrence in the case of same
// preference but `Iterator::max_by_key` would give us the last occurrence
for pref in &self.0 {
// only change if strictly greater
// equal items, even while unsorted, still have higher preference if they appear first
if pref.quality > max_pref {
max_pref = pref.quality;
max_item = Some(pref.item.clone());
}
}
max_item.unwrap_or(mime::STAR_STAR)
}
}
@ -216,12 +239,12 @@ mod tests {
use crate::http::header::q;
#[test]
fn test_mime_precedence() {
fn ranking_precedence() {
let test = Accept(vec![]);
assert!(test.mime_precedence().is_empty());
assert!(test.ranked().is_empty());
let test = Accept(vec![qitem(mime::APPLICATION_JSON)]);
assert_eq!(test.mime_precedence(), vec!(mime::APPLICATION_JSON));
assert_eq!(test.ranked(), vec!(mime::APPLICATION_JSON));
let test = Accept(vec![
qitem(mime::TEXT_HTML),
@ -230,7 +253,7 @@ mod tests {
QualityItem::new(mime::STAR_STAR, q(0.8)),
]);
assert_eq!(
test.mime_precedence(),
test.ranked(),
vec![
mime::TEXT_HTML,
"application/xhtml+xml".parse().unwrap(),
@ -245,20 +268,20 @@ mod tests {
qitem(mime::IMAGE_PNG),
]);
assert_eq!(
test.mime_precedence(),
test.ranked(),
vec![mime::IMAGE_PNG, mime::IMAGE_STAR, mime::STAR_STAR]
);
}
#[test]
fn test_mime_preference() {
fn preference_selection() {
let test = Accept(vec![
qitem(mime::TEXT_HTML),
"application/xhtml+xml".parse().unwrap(),
QualityItem::new("application/xml".parse().unwrap(), q(0.9)),
QualityItem::new(mime::STAR_STAR, q(0.8)),
]);
assert_eq!(test.mime_preference(), Some(mime::TEXT_HTML));
assert_eq!(test.preference(), mime::TEXT_HTML);
let test = Accept(vec![
QualityItem::new("video/*".parse().unwrap(), q(0.8)),
@ -267,6 +290,6 @@ mod tests {
qitem(mime::IMAGE_SVG),
QualityItem::new(mime::IMAGE_STAR, q(0.8)),
]);
assert_eq!(test.mime_preference(), Some(mime::IMAGE_PNG));
assert_eq!(test.preference(), mime::IMAGE_PNG);
}
}

210
src/http/header/accept_language.rs
View file

@ -1,66 +1,224 @@
use language_tags::LanguageTag;
use super::{QualityItem, ACCEPT_LANGUAGE};
use super::{common_header, Preference, QualityItem};
use crate::http::header;
crate::http::header::common_header! {
common_header! {
/// `Accept-Language` header, defined
/// in [RFC 7231 §5.3.5](https://datatracker.ietf.org/doc/html/rfc7231#section-5.3.5)
///
/// The `Accept-Language` header field can be used by user agents to
/// indicate the set of natural languages that are preferred in the
/// response.
/// The `Accept-Language` header field can be used by user agents to indicate the set of natural
/// languages that are preferred in the response.
///
/// The `Accept-Language` header is defined in
/// [RFC 7231 §5.3.5](https://datatracker.ietf.org/doc/html/rfc7231#section-5.3.5) using language
/// ranges defined in [RFC 4647 §2.1](https://datatracker.ietf.org/doc/html/rfc4647#section-2.1).
///
/// # ABNF
///
/// ```text
/// Accept-Language = 1#( language-range [ weight ] )
/// language-range = <language-range, see [RFC4647], Section 2.1>
/// language-range = (1*8ALPHA *("-" 1*8alphanum)) / "*"
/// alphanum = ALPHA / DIGIT
/// weight = OWS ";" OWS "q=" qvalue
/// qvalue = ( "0" [ "." 0*3DIGIT ] )
/// / ( "1" [ "." 0*3("0") ] )
/// ```
///
/// # Example values
/// * `da, en-gb;q=0.8, en;q=0.7`
/// * `en-us;q=1.0, en;q=0.5, fr`
/// # Example Values
/// - `da, en-gb;q=0.8, en;q=0.7`
/// - `en-us;q=1.0, en;q=0.5, fr`
/// - `fr-CH, fr;q=0.9, en;q=0.8, de;q=0.7, *;q=0.5`
///
/// # Examples
///
/// ```
/// use actix_web::HttpResponse;
/// use actix_web::http::header::{AcceptLanguage, LanguageTag, qitem};
/// use actix_web::http::header::{AcceptLanguage, qitem};
///
/// let mut builder = HttpResponse::Ok();
/// let langtag = LanguageTag::parse("en-US").unwrap();
/// builder.insert_header(
/// AcceptLanguage(vec![
/// qitem(langtag),
/// qitem("en-US".parse().unwrap())
/// ])
/// );
/// ```
///
/// ```
/// use actix_web::HttpResponse;
/// use actix_web::http::header::{AcceptLanguage, LanguageTag, QualityItem, q, qitem};
/// use actix_web::http::header::{AcceptLanguage, QualityItem, q, qitem};
///
/// let mut builder = HttpResponse::Ok();
/// builder.insert_header(
/// AcceptLanguage(vec![
/// qitem(LanguageTag::parse("da").unwrap()),
/// QualityItem::new(LanguageTag::parse("en-GB").unwrap(), q(800)),
/// QualityItem::new(LanguageTag::parse("en").unwrap(), q(700)),
/// qitem("da".parse().unwrap()),
/// QualityItem::new("en-GB".parse().unwrap(), q(800)),
/// QualityItem::new("en".parse().unwrap(), q(700)),
/// ])
/// );
/// ```
(AcceptLanguage, ACCEPT_LANGUAGE) => (QualityItem<LanguageTag>)+
(AcceptLanguage, header::ACCEPT_LANGUAGE) => (QualityItem<Preference<LanguageTag>>)*
test_accept_language {
// From the RFC
crate::http::header::common_header_test!(test1, vec![b"da, en-gb;q=0.8, en;q=0.7"]);
// Own test
crate::http::header::common_header_test!(
test2, vec![b"en-US, en; q=0.5, fr"],
parse_and_fmt_tests {
common_header_test!(no_headers, vec![b""; 0], Some(AcceptLanguage(vec![])));
common_header_test!(empty_header, vec![b""; 1], Some(AcceptLanguage(vec![])));
common_header_test!(
example_from_rfc,
vec![b"da, en-gb;q=0.8, en;q=0.7"]
);
common_header_test!(
not_ordered_by_weight,
vec![b"en-US, en; q=0.5, fr"],
Some(AcceptLanguage(vec![
qitem("en-US".parse().unwrap()),
QualityItem::new("en".parse().unwrap(), q(500)),
qitem("fr".parse().unwrap()),
])));
]))
);
common_header_test!(
has_wildcard,
vec![b"fr-CH, fr; q=0.9, en; q=0.8, de; q=0.7, *; q=0.5"],
Some(AcceptLanguage(vec![
qitem("fr-CH".parse().unwrap()),
QualityItem::new("fr".parse().unwrap(), q(900)),
QualityItem::new("en".parse().unwrap(), q(800)),
QualityItem::new("de".parse().unwrap(), q(700)),
QualityItem::new("*".parse().unwrap(), q(500)),
]))
);
}
}
impl AcceptLanguage {
/// Returns a sorted list of languages from highest to lowest precedence, accounting
/// for [q-factor weighting].
///
/// [q-factor weighting]: https://datatracker.ietf.org/doc/html/rfc7231#section-5.3.2
pub fn ranked(&self) -> Vec<Preference<LanguageTag>> {
if self.0.is_empty() {
return vec![];
}
let mut types = self.0.clone();
// use stable sort so items with equal q-factor retain listed order
types.sort_by(|a, b| {
// sort by q-factor descending
b.quality.cmp(&a.quality)
});
types.into_iter().map(|qitem| qitem.item).collect()
}
/// Extracts the most preferable language, accounting for [q-factor weighting].
///
/// If no q-factors are provided, the first language is chosen. Note that items without
/// q-factors are given the maximum preference value.
///
/// As per the spec, returns [`Preference::Any`] if contained list is empty.
///
/// [q-factor weighting]: https://datatracker.ietf.org/doc/html/rfc7231#section-5.3.2
pub fn preference(&self) -> Preference<LanguageTag> {
use actix_http::header::q;
let mut max_item = None;
let mut max_pref = q(0);
// uses manual max lookup loop since we want the first occurrence in the case of same
// preference but `Iterator::max_by_key` would give us the last occurrence
for pref in &self.0 {
// only change if strictly greater
// equal items, even while unsorted, still have higher preference if they appear first
if pref.quality > max_pref {
max_pref = pref.quality;
max_item = Some(pref.item.clone());
}
}
max_item.unwrap_or(Preference::Any)
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::http::header::*;
#[test]
fn ranking_precedence() {
let test = AcceptLanguage(vec![]);
assert!(test.ranked().is_empty());
let test = AcceptLanguage(vec![qitem("fr-CH".parse().unwrap())]);
assert_eq!(test.ranked(), vec!("fr-CH".parse().unwrap()));
let test = AcceptLanguage(vec![
QualityItem::new("fr".parse().unwrap(), q(900)),
QualityItem::new("fr-CH".parse().unwrap(), q(1000)),
QualityItem::new("en".parse().unwrap(), q(800)),
QualityItem::new("*".parse().unwrap(), q(500)),
QualityItem::new("de".parse().unwrap(), q(700)),
]);
assert_eq!(
test.ranked(),
vec![
"fr-CH".parse().unwrap(),
"fr".parse().unwrap(),
"en".parse().unwrap(),
"de".parse().unwrap(),
"*".parse().unwrap(),
]
);
let test = AcceptLanguage(vec![
qitem("fr".parse().unwrap()),
qitem("fr-CH".parse().unwrap()),
qitem("en".parse().unwrap()),
qitem("*".parse().unwrap()),
qitem("de".parse().unwrap()),
]);
assert_eq!(
test.ranked(),
vec![
"fr".parse().unwrap(),
"fr-CH".parse().unwrap(),
"en".parse().unwrap(),
"*".parse().unwrap(),
"de".parse().unwrap(),
]
);
}
#[test]
fn preference_selection() {
let test = AcceptLanguage(vec![
QualityItem::new("fr".parse().unwrap(), q(900)),
QualityItem::new("fr-CH".parse().unwrap(), q(1000)),
QualityItem::new("en".parse().unwrap(), q(800)),
QualityItem::new("*".parse().unwrap(), q(500)),
QualityItem::new("de".parse().unwrap(), q(700)),
]);
assert_eq!(
test.preference(),
Preference::Specific("fr-CH".parse().unwrap())
);
let test = AcceptLanguage(vec![
qitem("fr".parse().unwrap()),
qitem("fr-CH".parse().unwrap()),
qitem("en".parse().unwrap()),
qitem("*".parse().unwrap()),
qitem("de".parse().unwrap()),
]);
assert_eq!(
test.preference(),
Preference::Specific("fr".parse().unwrap())
);
let test = AcceptLanguage(vec![]);
assert_eq!(test.preference(), Preference::Any);
}
}

138
src/http/header/macros.rs
View file

@ -1,33 +1,36 @@
// TODO: replace with derive_more impl
macro_rules! common_header_deref {
($from:ty => $to:ty) => {
impl ::std::ops::Deref for $from {
impl ::core::ops::Deref for $from {
type Target = $to;
#[inline]
fn deref(&self) -> &$to {
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl ::std::ops::DerefMut for $from {
impl ::core::ops::DerefMut for $from {
#[inline]
fn deref_mut(&mut self) -> &mut $to {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.0
}
}
};
}
/// Sets up a test module with some useful imports for use with [`common_header_test!`].
macro_rules! common_header_test_module {
($id:ident, $tm:ident{$($tf:item)*}) => {
#[allow(unused_imports)]
#[cfg(test)]
mod $tm {
#![allow(unused_imports)]
use std::str;
use actix_http::http::Method;
use mime::*;
use $crate::http::header::*;
use super::$id as HeaderField;
use super::{$id as HeaderField, *};
$($tf)*
}
}
@ -42,14 +45,19 @@ macro_rules! common_header_test {
let raw = $raw;
let a: Vec<Vec<u8>> = raw.iter().map(|x| x.to_vec()).collect();
let mut req = test::TestRequest::default();
for item in a {
req = req.insert_header((HeaderField::name(), item)).take();
}
let req = req.finish();
let value = HeaderField::parse(&req);
let result = format!("{}", value.unwrap());
let expected = String::from_utf8(raw[0].to_vec()).unwrap();
let result_cmp: Vec<String> = result
.to_ascii_lowercase()
.split(' ')
@ -60,10 +68,12 @@ macro_rules! common_header_test {
.split(' ')
.map(|x| x.to_owned())
.collect();
assert_eq!(result_cmp.concat(), expected_cmp.concat());
}
};
($id:ident, $raw:expr, $typed:expr) => {
($id:ident, $raw:expr, $exp:expr) => {
#[test]
fn $id() {
use actix_http::test;
@ -75,26 +85,35 @@ macro_rules! common_header_test {
}
let req = req.finish();
let val = HeaderField::parse(&req);
let typed: Option<HeaderField> = $typed;
// Test parsing
assert_eq!(val.ok(), typed);
// Test formatting
if typed.is_some() {
let exp: Option<HeaderField> = $exp;
println!("req: {:?}", &req);
println!("val: {:?}", &val);
println!("exp: {:?}", &exp);
// test parsing
assert_eq!(val.ok(), exp);
// test formatting
if let Some(exp) = exp {
let raw = &($raw)[..];
let mut iter = raw.iter().map(|b| str::from_utf8(&b[..]).unwrap());
let mut joined = String::new();
joined.push_str(iter.next().unwrap());
for s in iter {
joined.push_str(", ");
if let Some(s) = iter.next() {
joined.push_str(s);
for s in iter {
joined.push_str(", ");
joined.push_str(s);
}
}
assert_eq!(format!("{}", typed.unwrap()), joined);
assert_eq!(format!("{}", exp), joined);
}
}
};
}
macro_rules! common_header {
// TODO: these docs are wrong, there's no $n or $nn
// $a:meta: Attributes associated with the header item (usually docs)
// $id:ident: Identifier of the header
// $n:expr: Lowercase name of the header
@ -111,92 +130,100 @@ macro_rules! common_header {
fn name() -> $crate::http::header::HeaderName {
$name
}
#[inline]
fn parse<T>(msg: &T) -> Result<Self, $crate::error::ParseError>
where T: $crate::HttpMessage
{
$crate::http::header::from_comma_delimited(
msg.headers().get_all(Self::name())).map($id)
fn parse<M: $crate::HttpMessage>(msg: &M) -> Result<Self, $crate::error::ParseError> {
let headers = msg.headers().get_all(Self::name());
$crate::http::header::from_comma_delimited(headers).map($id)
}
}
impl std::fmt::Display for $id {
impl ::core::fmt::Display for $id {
#[inline]
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> ::std::fmt::Result {
fn fmt(&self, f: &mut ::core::fmt::Formatter<'_>) -> ::core::fmt::Result {
$crate::http::header::fmt_comma_delimited(f, &self.0[..])
}
}
impl $crate::http::header::IntoHeaderValue for $id {
type Error = $crate::http::header::InvalidHeaderValue;
fn try_into_value(self) -> Result<$crate::http::header::HeaderValue, Self::Error> {
use std::fmt::Write;
use ::core::fmt::Write;
let mut writer = $crate::http::header::Writer::new();
let _ = write!(&mut writer, "{}", self);
$crate::http::header::HeaderValue::from_maybe_shared(writer.take())
}
}
};
// List header, one or more items
($(#[$a:meta])*($id:ident, $name:expr) => ($item:ty)+) => {
$(#[$a])*
#[derive(Clone, Debug, PartialEq)]
pub struct $id(pub Vec<$item>);
crate::http::header::common_header_deref!($id => Vec<$item>);
impl $crate::http::header::Header for $id {
#[inline]
fn name() -> $crate::http::header::HeaderName {
$name
}
#[inline]
fn parse<T>(msg: &T) -> Result<Self, $crate::error::ParseError>
where T: $crate::HttpMessage
{
fn parse<M: $crate::HttpMessage>(msg: &M) -> Result<Self, $crate::error::ParseError> {
$crate::http::header::from_comma_delimited(
msg.headers().get_all(Self::name())).map($id)
}
}
impl std::fmt::Display for $id {
impl ::core::fmt::Display for $id {
#[inline]
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
fn fmt(&self, f: &mut ::core::fmt::Formatter<'_>) -> ::core::fmt::Result {
$crate::http::header::fmt_comma_delimited(f, &self.0[..])
}
}
impl $crate::http::header::IntoHeaderValue for $id {
type Error = $crate::http::header::InvalidHeaderValue;
fn try_into_value(self) -> Result<$crate::http::header::HeaderValue, Self::Error> {
use std::fmt::Write;
use ::core::fmt::Write;
let mut writer = $crate::http::header::Writer::new();
let _ = write!(&mut writer, "{}", self);
$crate::http::header::HeaderValue::from_maybe_shared(writer.take())
}
}
};
// Single value header
($(#[$a:meta])*($id:ident, $name:expr) => [$value:ty]) => {
$(#[$a])*
#[derive(Clone, Debug, PartialEq)]
pub struct $id(pub $value);
crate::http::header::common_header_deref!($id => $value);
impl $crate::http::header::Header for $id {
#[inline]
fn name() -> $crate::http::header::HeaderName {
$name
}
#[inline]
fn parse<T>(msg: &T) -> Result<Self, $crate::error::ParseError>
where T: $crate::HttpMessage
{
$crate::http::header::from_one_raw_str(
msg.headers().get(Self::name())).map($id)
fn parse<M: $crate::HttpMessage>(msg: &M) -> Result<Self, $crate::error::ParseError> {
let header = msg.headers().get(Self::name());
$crate::http::header::from_one_raw_str(header).map($id)
}
}
impl std::fmt::Display for $id {
impl ::core::fmt::Display for $id {
#[inline]
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
std::fmt::Display::fmt(&self.0, f)
fn fmt(&self, f: &mut ::core::fmt::Formatter<'_>) -> ::core::fmt::Result {
::core::fmt::Display::fmt(&self.0, f)
}
}
impl $crate::http::header::IntoHeaderValue for $id {
type Error = $crate::http::header::InvalidHeaderValue;
@ -205,6 +232,7 @@ macro_rules! common_header {
}
}
};
// List header, one or more items with "*" option
($(#[$a:meta])*($id:ident, $name:expr) => {Any / ($item:ty)+}) => {
$(#[$a])*
@ -215,42 +243,46 @@ macro_rules! common_header {
/// Only the listed items are a match
Items(Vec<$item>),
}
impl $crate::http::header::Header for $id {
#[inline]
fn name() -> $crate::http::header::HeaderName {
$name
}
#[inline]
fn parse<T>(msg: &T) -> Result<Self, $crate::error::ParseError>
where T: $crate::HttpMessage
{
let any = msg.headers().get(Self::name()).and_then(|hdr| {
hdr.to_str().ok().and_then(|hdr| Some(hdr.trim() == "*"))});
if let Some(true) = any {
#[inline]
fn parse<M: $crate::HttpMessage>(msg: &M) -> Result<Self, $crate::error::ParseError> {
let is_any = msg
.headers()
.get(Self::name())
.and_then(|hdr| hdr.to_str().ok())
.map(|hdr| hdr.trim() == "*");
if let Some(true) = is_any {
Ok($id::Any)
} else {
Ok($id::Items(
$crate::http::header::from_comma_delimited(
msg.headers().get_all(Self::name()))?))
let headers = msg.headers().get_all(Self::name());
Ok($id::Items($crate::http::header::from_comma_delimited(headers)?))
}
}
}
impl std::fmt::Display for $id {
impl ::core::fmt::Display for $id {
#[inline]
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
fn fmt(&self, f: &mut ::core::fmt::Formatter<'_>) -> ::core::fmt::Result {
match *self {
$id::Any => f.write_str("*"),
$id::Items(ref fields) => $crate::http::header::fmt_comma_delimited(
f, &fields[..])
$id::Items(ref fields) =>
$crate::http::header::fmt_comma_delimited(f, &fields[..])
}
}
}
impl $crate::http::header::IntoHeaderValue for $id {
type Error = $crate::http::header::InvalidHeaderValue;
fn try_into_value(self) -> Result<$crate::http::header::HeaderValue, Self::Error> {
use std::fmt::Write;
use ::core::fmt::Write;
let mut writer = $crate::http::header::Writer::new();
let _ = write!(&mut writer, "{}", self);
$crate::http::header::HeaderValue::from_maybe_shared(writer.take())

77
src/http/header/mod.rs
View file

@ -1,15 +1,52 @@
//! A Collection of Header implementations for common HTTP Headers.
//!
//! ## Mime
//!
//! ## Mime Types
//! Several header fields use MIME values for their contents. Keeping with the strongly-typed theme,
//! the [mime] crate is used in such headers as [`ContentType`] and [`Accept`].
use bytes::{Bytes, BytesMut};
use std::fmt;
pub use self::accept_charset::AcceptCharset;
use bytes::{Bytes, BytesMut};
// re-export from actix-http
// - header name / value types
// - relevant traits for converting to header name / value
// - all const header names
// - header map
// - the few typed headers from actix-http
// - header parsing utils
pub use actix_http::http::header::*;
mod accept_charset;
// mod accept_encoding;
mod accept;
mod accept_language;
mod allow;
mod cache_control;
mod content_disposition;
mod content_language;
mod content_range;
mod content_type;
mod date;
mod encoding;
mod entity;
mod etag;
mod expires;
mod if_match;
mod if_modified_since;
mod if_none_match;
mod if_range;
mod if_unmodified_since;
mod last_modified;
mod macros;
mod preference;
// mod range;
#[cfg(test)]
pub(crate) use macros::common_header_test;
pub(crate) use macros::{common_header, common_header_deref, common_header_test_module};
pub use self::accept_charset::AcceptCharset;
//pub use self::accept_encoding::AcceptEncoding;
pub use self::accept::Accept;
pub use self::accept_language::AcceptLanguage;
@ -30,11 +67,10 @@ pub use self::if_none_match::IfNoneMatch;
pub use self::if_range::IfRange;
pub use self::if_unmodified_since::IfUnmodifiedSince;
pub use self::last_modified::LastModified;
pub use self::preference::Preference;
//pub use self::range::{Range, ByteRangeSpec};
pub(crate) use actix_http::http::header::{
fmt_comma_delimited, from_comma_delimited, from_one_raw_str,
};
/// Format writer ([`fmt::Write`]) for a [`BytesMut`].
#[derive(Debug, Default)]
struct Writer {
buf: BytesMut,
@ -62,30 +98,3 @@ impl fmt::Write for Writer {
fmt::write(self, args)
}
}
mod accept_charset;
// mod accept_encoding;
mod accept;
mod accept_language;
mod allow;
mod cache_control;
mod content_disposition;
mod content_language;
mod content_range;
mod content_type;
mod date;
mod encoding;
mod entity;
mod etag;
mod expires;
mod if_match;
mod if_modified_since;
mod if_none_match;
mod if_range;
mod if_unmodified_since;
mod last_modified;
mod macros;
#[cfg(test)]
pub(crate) use macros::common_header_test;
pub(crate) use macros::{common_header, common_header_deref, common_header_test_module};

70
src/http/header/preference.rs Normal file
View file

@ -0,0 +1,70 @@
use std::{
fmt::{self, Write as _},
str,
};
/// A wrapper for types used in header values where wildcard (`*`) items are allowed but the
/// underlying type does not support them.
///
/// For example, we use the `language-tags` crate for the [`AcceptLanguage`](super::AcceptLanguage)
/// typed header but it does not parse `*` successfully. On the other hand, the `mime` crate, used
/// for [`Accept`](super::Accept), has first-party support for wildcard items so this wrapper is not
/// used in those header types.
#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Hash)]
pub enum Preference<T> {
/// A wildcard value.
Any,
/// A valid `T`.
Specific(T),
}
impl<T> Preference<T> {
/// Returns true if preference is the any/wildcard (`*`) value.
pub fn is_any(&self) -> bool {
matches!(self, Self::Any)
}
/// Returns true if preference is the specific item (`T`) variant.
pub fn is_specific(&self) -> bool {
matches!(self, Self::Specific(_))
}
/// Returns reference to value in `Specific` variant, if it is set.
pub fn item(&self) -> Option<&T> {
match self {
Preference::Specific(ref item) => Some(item),
Preference::Any => None,
}
}
/// Consumes the container, returning the value in the `Specific` variant, if it is set.
pub fn into_item(self) -> Option<T> {
match self {
Preference::Specific(item) => Some(item),
Preference::Any => None,
}
}
}
impl<T: fmt::Display> fmt::Display for Preference<T> {
#[inline]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Preference::Any => f.write_char('*'),
Preference::Specific(item) => fmt::Display::fmt(item, f),
}
}
}
impl<T: str::FromStr> str::FromStr for Preference<T> {
type Err = T::Err;
#[inline]
fn from_str(s: &str) -> Result<Self, Self::Err> {
match s.trim() {
"*" => Ok(Self::Any),
other => other.parse().map(Preference::Specific),
}
}
}