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Code Issues Releases Wiki Activity

Rename Path::{len => segment_count} (#370)

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Rob Ede 2021-07-16 19:43:48 +01:00 committed by GitHub
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commit c2d5b2398a
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5 changed files with 162 additions and 102 deletions
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3
actix-router/CHANGES.md
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@ -4,9 +4,12 @@
* Fix segment interpolation leaving `Path` in unintended state after matching. [#368]
* Path tail pattern now works as expected after a dynamic segment (e.g. `/user/{uid}/*`). [#366]
* Fixed a bug where, in multi-patterns, static patterns are interpreted as regex. [#366]
* Rename `Path::{len => segment_count}` to be more descriptive of it's purpose. [#370]
[#368]: https://github.com/actix/actix-net/pull/368
[#366]: https://github.com/actix/actix-net/pull/366
[#368]: https://github.com/actix/actix-net/pull/368
[#370]: https://github.com/actix/actix-net/pull/370
## 0.4.0 - 2021-06-06

20
actix-router/Cargo.toml
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@ -1,10 +1,14 @@
[package]
name = "actix-router"
version = "0.4.0"
authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
authors = [
"Nikolay Kim <fafhrd91@gmail.com>",
"Ali MJ Al-Nasrawy <alimjalnasrawy@gmail.com>",
"Rob Ede <robjtede@icloud.com>",
]
description = "Resource path matching library"
keywords = ["actix", "router", "routing"]
repository = "https://github.com/actix/actix-net"
repository = "https://github.com/actix/actix-net.git"
license = "MIT OR Apache-2.0"
edition = "2018"
@ -16,12 +20,12 @@ path = "src/lib.rs"
default = ["http"]
[dependencies]
regex = "1.3.1"
serde = "1.0.104"
regex = "1.5"
serde = "1"
bytestring = ">=0.1.5, <2"
log = "0.4.8"
http = { version = "0.2.2", optional = true }
log = "0.4"
http = { version = "0.2.3", optional = true }
[dev-dependencies]
http = "0.2.2"
serde_derive = "1.0"
http = "0.2.3"
serde = { version = "1", features = ["derive"] }

26
actix-router/src/de.rs
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@ -24,9 +24,12 @@ macro_rules! parse_single_value {
where
V: Visitor<'de>,
{
if self.path.len() != 1 {
if self.path.segment_count() != 1 {
Err(de::value::Error::custom(
format!("wrong number of parameters: {} expected 1", self.path.len())
format!(
"wrong number of parameters: {} expected 1",
self.path.segment_count()
)
.as_str(),
))
} else {
@ -110,11 +113,11 @@ impl<'de, T: ResourcePath + 'de> Deserializer<'de> for PathDeserializer<'de, T>
where
V: Visitor<'de>,
{
if self.path.len() < len {
if self.path.segment_count() < len {
Err(de::value::Error::custom(
format!(
"wrong number of parameters: {} expected {}",
self.path.len(),
self.path.segment_count(),
len
)
.as_str(),
@ -135,11 +138,11 @@ impl<'de, T: ResourcePath + 'de> Deserializer<'de> for PathDeserializer<'de, T>
where
V: Visitor<'de>,
{
if self.path.len() < len {
if self.path.segment_count() < len {
Err(de::value::Error::custom(
format!(
"wrong number of parameters: {} expected {}",
self.path.len(),
self.path.segment_count(),
len
)
.as_str(),
@ -173,9 +176,13 @@ impl<'de, T: ResourcePath + 'de> Deserializer<'de> for PathDeserializer<'de, T>
where
V: Visitor<'de>,
{
if self.path.len() != 1 {
if self.path.segment_count() != 1 {
Err(de::value::Error::custom(
format!("wrong number of parameters: {} expected 1", self.path.len()).as_str(),
format!(
"wrong number of parameters: {} expected 1",
self.path.segment_count()
)
.as_str(),
))
} else {
visitor.visit_str(&self.path[0])
@ -485,8 +492,7 @@ impl<'de> de::VariantAccess<'de> for UnitVariant {
#[cfg(test)]
mod tests {
use serde::de;
use serde_derive::Deserialize;
use serde::{de, Deserialize};
use super::*;
use crate::path::Path;

32
actix-router/src/path.rs
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@ -18,36 +18,16 @@ impl Default for PathItem {
}
}
/// Resource path match information
/// Resource path match information.
///
/// If resource path contains variable patterns, `Path` stores them.
#[derive(Debug)]
#[derive(Debug, Clone, Default)]
pub struct Path<T> {
path: T,
pub(crate) skip: u16,
pub(crate) segments: Vec<(Cow<'static, str>, PathItem)>,
}
impl<T: Default> Default for Path<T> {
fn default() -> Self {
Path {
path: T::default(),
skip: 0,
segments: Vec::new(),
}
}
}
impl<T: Clone> Clone for Path<T> {
fn clone(&self) -> Self {
Path {
path: self.path.clone(),
skip: self.skip,
segments: self.segments.clone(),
}
}
}
impl<T: ResourcePath> Path<T> {
pub fn new(path: T) -> Path<T> {
Path {
@ -122,15 +102,15 @@ impl<T: ResourcePath> Path<T> {
.push((name.into(), PathItem::Static(value.into())));
}
/// Check if there are any matched patterns
/// Check if there are any matched patterns.
#[inline]
pub fn is_empty(&self) -> bool {
self.segments.is_empty()
}
/// Check number of extracted parameters
/// Returns number of interpolated segments.
#[inline]
pub fn len(&self) -> usize {
pub fn segment_count(&self) -> usize {
self.segments.len()
}
@ -195,7 +175,7 @@ impl<'a, T: ResourcePath> Iterator for PathIter<'a, T> {
#[inline]
fn next(&mut self) -> Option<(&'a str, &'a str)> {
if self.idx < self.params.len() {
if self.idx < self.params.segment_count() {
let idx = self.idx;
let res = match self.params.segments[idx].1 {
PathItem::Static(ref s) => &s,

171
actix-router/src/resource.rs
View File

@ -1,7 +1,10 @@
use std::cmp::min;
use std::collections::HashMap;
use std::hash::{Hash, Hasher};
use std::mem;
use std::{
borrow::Cow,
cmp::min,
collections::HashMap,
hash::{Hash, Hasher},
mem,
};
use regex::{escape, Regex, RegexSet};
@ -15,30 +18,51 @@ const MAX_DYNAMIC_SEGMENTS: usize = 16;
/// See the docs under: https://docs.rs/regex/1.5.4/regex/#grouping-and-flags
const REGEX_FLAGS: &str = "(?s-m)";
/// ResourceDef describes an entry in resources table
/// Describes an entry in a resource table.
///
/// Resource definition can contain only 16 dynamic segments
/// Resource definition can contain at most 16 dynamic segments.
#[derive(Clone, Debug)]
pub struct ResourceDef {
id: u16,
tp: PatternType,
/// Pattern type.
pat_type: PatternType,
/// Optional name of resource definition. Defaults to "".
name: String,
/// Pattern that generated the resource definition.
// TODO: Sort of, in dynamic set pattern type it is blank, consider change to option.
pattern: String,
/// List of elements that compose the pattern, in order.
///
/// `None` with pattern type is DynamicSet.
elements: Option<Vec<PatternElement>>,
}
#[derive(Debug, Clone, PartialEq)]
enum PatternElement {
/// Literal slice of pattern.
Const(String),
/// Name of dynamic segment.
Var(String),
}
#[derive(Clone, Debug)]
#[allow(clippy::large_enum_variant)]
enum PatternType {
/// Single constant/literal segment.
Static(String),
/// Single constant/literal prefix segment.
Prefix(String),
/// Single regular expression and list of dynamic segment names.
Dynamic(Regex, Vec<&'static str>),
/// Regular expression set and list of component expressions plus dynamic segment names.
DynamicSet(RegexSet, Vec<(Regex, Vec<&'static str>)>),
}
@ -65,7 +89,7 @@ impl ResourceDef {
ResourceDef {
id: 0,
tp: PatternType::DynamicSet(RegexSet::new(re_set).unwrap(), data),
pat_type: PatternType::DynamicSet(RegexSet::new(re_set).unwrap(), data),
elements: None,
name: String::new(),
pattern: "".to_owned(),
@ -82,9 +106,8 @@ impl ResourceDef {
ResourceDef::from_single_pattern(path, true)
}
/// Parse path pattern and create new `Pattern` instance.
/// Inserts `/` to begging of the pattern.
///
/// Parse path pattern and create new `Pattern` instance, inserting a `/` to beginning of
/// the pattern if absent.
///
/// Use `prefix` type instead of `static`.
///
@ -93,12 +116,12 @@ impl ResourceDef {
ResourceDef::from_single_pattern(&insert_slash(path), true)
}
/// Resource id
/// Resource ID.
pub fn id(&self) -> u16 {
self.id
}
/// Set resource id
/// Set resource ID.
pub fn set_id(&mut self, id: u16) {
self.id = id;
}
@ -106,10 +129,10 @@ impl ResourceDef {
/// Parse path pattern and create a new instance
fn from_single_pattern(pattern: &str, for_prefix: bool) -> Self {
let pattern = pattern.to_owned();
let (tp, elements) = ResourceDef::parse(&pattern, for_prefix, false);
let (pat_type, elements) = ResourceDef::parse(&pattern, for_prefix, false);
ResourceDef {
tp,
pat_type,
pattern,
elements: Some(elements),
id: 0,
@ -117,7 +140,7 @@ impl ResourceDef {
}
}
/// Resource pattern name
/// Resource pattern name.
pub fn name(&self) -> &str {
&self.name
}
@ -135,7 +158,7 @@ impl ResourceDef {
/// Check if path matches this pattern.
#[inline]
pub fn is_match(&self, path: &str) -> bool {
match self.tp {
match self.pat_type {
PatternType::Static(ref s) => s == path,
PatternType::Prefix(ref s) => path.starts_with(s),
PatternType::Dynamic(ref re, _) => re.is_match(path),
@ -145,34 +168,52 @@ impl ResourceDef {
/// Is prefix path a match against this resource.
pub fn is_prefix_match(&self, path: &str) -> Option<usize> {
let p_len = path.len();
let path_len = path.len();
let path = if path.is_empty() { "/" } else { path };
match self.tp {
PatternType::Static(ref s) => {
if s == path {
Some(p_len)
match self.pat_type {
PatternType::Static(ref segment) => {
if segment == path {
Some(path_len)
} else {
None
}
}
PatternType::Dynamic(ref re, _) => re.find(path).map(|m| m.end()),
PatternType::Prefix(ref s) => {
let len = if path == s {
s.len()
} else if path.starts_with(s)
&& (s.ends_with('/') || path.split_at(s.len()).1.starts_with('/'))
{
if s.ends_with('/') {
s.len() - 1
PatternType::Prefix(ref prefix) => {
let prefix_len = if path == prefix {
// path length === prefix segment length
path_len
} else {
s.len()
let is_slash_next =
prefix.ends_with('/') || path.split_at(prefix.len()).1.starts_with('/');
if path.starts_with(prefix) && is_slash_next {
// enters this branch if segment delimiter ("/") is present after prefix
//
// i.e., path starts with prefix segment
// and prefix segment ends with /
// or first character in path after prefix segment length is /
//
// eg: Prefix("/test/") or Prefix("/test") would match:
// - /test/foo
// - /test/foo
if prefix.ends_with('/') {
prefix.len() - 1
} else {
prefix.len()
}
} else {
return None;
};
Some(min(p_len, len))
}
};
Some(min(path_len, prefix_len))
}
PatternType::Dynamic(ref re, _) => re.find(path).map(|m| m.end()),
PatternType::DynamicSet(ref re, ref params) => {
let idx = re.matches(path).into_iter().next()?;
let (ref pattern, _) = params[idx];
@ -201,37 +242,48 @@ impl ResourceDef {
let mut segments: [PathItem; MAX_DYNAMIC_SEGMENTS] = Default::default();
let path = res.resource_path();
let (matched_len, matched_vars) = match self.tp {
PatternType::Static(ref s) => {
if s != path.path() {
let (matched_len, matched_vars) = match self.pat_type {
PatternType::Static(ref segment) => {
if segment != path.path() {
return false;
}
(path.path().len(), None)
}
PatternType::Prefix(ref s) => {
PatternType::Prefix(ref prefix) => {
let path_str = path.path();
let path_len = path_str.len();
let len = {
let r_path = path.path();
if s == r_path {
s.len()
} else if r_path.starts_with(s)
&& (s.ends_with('/') || r_path.split_at(s.len()).1.starts_with('/'))
{
if s.ends_with('/') {
s.len() - 1
if prefix == path_str {
// prefix length === path length
path_len
} else {
s.len()
let is_slash_next = prefix.ends_with('/')
|| path_str.split_at(prefix.len()).1.starts_with('/');
if path_str.starts_with(prefix) && is_slash_next {
if prefix.ends_with('/') {
prefix.len() - 1
} else {
prefix.len()
}
} else {
return false;
}
}
};
(min(path.path().len(), len), None)
}
PatternType::Dynamic(ref re, ref names) => {
let captures = match re.captures(path.path()) {
Some(captures) => captures,
_ => return false,
};
for (no, name) in names.iter().enumerate() {
if let Some(m) = captures.name(&name) {
segments[no] = PathItem::Segment(m.start() as u16, m.end() as u16);
@ -240,18 +292,22 @@ impl ResourceDef {
return false;
}
}
(captures[0].len(), Some(names))
}
PatternType::DynamicSet(ref re, ref params) => {
let path = path.path();
let (pattern, names) = match re.matches(path).into_iter().next() {
Some(idx) => &params[idx],
_ => return false,
};
let captures = match pattern.captures(path.path()) {
Some(captures) => captures,
_ => return false,
};
for (no, name) in names.iter().enumerate() {
if let Some(m) = captures.name(&name) {
segments[no] = PathItem::Segment(m.start() as u16, m.end() as u16);
@ -260,6 +316,7 @@ impl ResourceDef {
return false;
}
}
(captures[0].len(), Some(names))
}
};
@ -298,6 +355,7 @@ impl ResourceDef {
},
}
}
true
}
@ -327,6 +385,7 @@ impl ResourceDef {
fn parse_param(pattern: &str) -> (PatternElement, String, &str, bool) {
const DEFAULT_PATTERN: &str = "[^/]+";
const DEFAULT_PATTERN_TAIL: &str = ".*";
let mut params_nesting = 0usize;
let close_idx = pattern
.find(|c| match c {
@ -341,6 +400,7 @@ impl ResourceDef {
_ => false,
})
.expect("malformed dynamic segment");
let (mut param, mut rem) = pattern.split_at(close_idx + 1);
param = &param[1..param.len() - 1]; // Remove outer brackets
let tail = rem == "*";
@ -363,6 +423,7 @@ impl ResourceDef {
},
),
};
(
PatternElement::Var(name.to_string()),
format!(r"(?P<{}>{})", &name, &pattern),
@ -392,15 +453,19 @@ impl ResourceDef {
while let Some(idx) = pattern.find('{') {
let (prefix, rem) = pattern.split_at(idx);
elements.push(PatternElement::Const(String::from(prefix)));
re.push_str(&escape(prefix));
let (param_pattern, re_part, rem, tail) = Self::parse_param(rem);
if tail {
for_prefix = true;
}
elements.push(param_pattern);
re.push_str(&re_part);
pattern = rem;
dyn_elements += 1;
}
@ -466,12 +531,14 @@ impl From<String> for ResourceDef {
}
}
pub(crate) fn insert_slash(path: &str) -> String {
let mut path = path.to_owned();
pub(crate) fn insert_slash(path: &str) -> Cow<'_, str> {
if !path.is_empty() && !path.starts_with('/') {
path.insert(0, '/');
};
path
let mut new_path = "/".to_owned();
new_path.push_str(path);
Cow::Owned(new_path)
} else {
Cow::Borrowed(path)
}
}
#[cfg(test)]