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use failure::Fail;
#[cfg(feature = "regular_expression")]
use regex::Regex;
use std::cell::RefCell;
use url::{ParseError, SyntaxViolation, Url};
#[cfg(test)]
use std::path::Path;
#[derive(Clone, Debug, Display, Fail, PartialEq)]
pub enum UrlError {
ParseError(ParseError),
SyntaxViolation(SyntaxViolation),
JsonFragmentError(String),
}
impl From<ParseError> for UrlError {
fn from(error: ParseError) -> Self {
UrlError::ParseError(error)
}
}
impl From<SyntaxViolation> for UrlError {
fn from(error: SyntaxViolation) -> Self {
UrlError::SyntaxViolation(error)
}
}
#[cfg(feature = "regular_expression")]
fn get_invalid_fragment_part_according_to_json_pointer_rules(url: &Url) -> Option<String> {
let regex = Regex::new("#.*(~([^01]|$))").unwrap();
regex.captures(url.as_str()).and_then(|captures| Some(String::from(&captures[1])))
}
#[cfg(not(feature = "regular_expression"))]
fn get_invalid_fragment_part_according_to_json_pointer_rules(url: &Url) -> Option<String> {
let fragment = url.fragment().unwrap_or("/");
let mut next_character_error: Option<String> = None;
let _ = fragment.chars().collect::<Vec<char>>().windows(2).any(|window| {
let current = window[0];
let next = window[1];
if current == '~' && next != '0' && next != '1' {
next_character_error = Some(format!("{}{}", current, next));
return true;
}
false
});
if next_character_error.is_some() {
next_character_error
} else if fragment.ends_with('~') {
Some("~".to_string())
} else {
None
}
}
pub(crate) fn parse_and_normalize_url<R: AsRef<str>>(url: R) -> Result<Url, UrlError> {
let syntax_violations = RefCell::new(Vec::<SyntaxViolation>::new());
let mut url = Url::options()
.syntax_violation_callback(Some(&|v| syntax_violations.borrow_mut().push(v)))
.parse(url.as_ref())?;
if let Some(violation) = syntax_violations.borrow().first() {
Err(*violation)?
}
let cloned_url = url.clone();
let fragments = cloned_url.fragment().unwrap_or("").trim_end_matches('/');
let owned_fragment = if fragments.is_empty() {
"/".to_string()
} else if fragments.starts_with('/') {
fragments.to_string()
} else {
format!("/{}", fragments)
};
url.set_fragment(Some(owned_fragment.as_str()));
if let Some(invalid_fragment) = get_invalid_fragment_part_according_to_json_pointer_rules(&url) {
return Err(UrlError::JsonFragmentError(invalid_fragment));
}
Ok(url)
}
pub(crate) fn normalize_url_for_cache(url: &Url) -> Url {
let mut clone_url = url.clone();
clone_url.set_fragment(Some("/"));
clone_url
}
#[allow(dead_code)]
#[cfg(test)]
pub(crate) fn test_data_file_path(path: &str) -> String {
let repository_path = Path::new(file!()).canonicalize().unwrap().parent().unwrap().parent().unwrap().to_path_buf();
String::from(
path.split('/')
.collect::<Vec<_>>()
.iter()
.fold(repository_path.join("test-data"), |iter_path, &path_path| iter_path.join(path_path))
.canonicalize()
.unwrap()
.to_str()
.unwrap(),
)
}
#[allow(dead_code)]
#[cfg(test)]
pub(crate) fn test_data_file_url(path: &str) -> String {
Url::from_file_path(dbg!(test_data_file_path(path))).unwrap().to_string()
}
#[cfg(test)]
mod tests {
use super::{parse_and_normalize_url, UrlError};
use test_case_derive::test_case;
use url::{ParseError, SyntaxViolation};
#[test_case("memory://", "memory:///#/" :: "url_with_no_path_no_fragment")]
#[test_case("memory://#", "memory:///#/" :: "url_with_no_path")]
#[test_case("memory:///", "memory:///#/" :: "url_with_no_fragment")]
#[test_case("memory:///#", "memory:///#/" :: "url_with_path_and_fragment")]
#[test_case("memory:///#/", "memory:///#/" :: "url_with_path_and_fragment_normalized")]
#[test_case("memory:///#fragment", "memory:///#/fragment" :: "url_with_path_and_not_empty_fragment_1")]
#[test_case("memory:///#/fragment", "memory:///#/fragment" :: "url_with_path_and_not_empty_fragment_2")]
#[test_case("memory:///#/fragment/", "memory:///#/fragment" :: "url_with_path_and_not_empty_fragment_3")]
fn test_parse_and_normalize_url_valid_case(url_str: &str, expected_result_str: &str) {
assert_eq!(parse_and_normalize_url(url_str).unwrap().as_str(), expected_result_str);
}
#[test_case("http:///", UrlError::ParseError(ParseError::EmptyHost))]
#[test_case("http://300.0.0.0/", UrlError::ParseError(ParseError::InvalidIpv4Address))]
#[test_case("memory://#/\0a", UrlError::SyntaxViolation(SyntaxViolation::NullInFragment))]
#[test_case("http:/example", UrlError::SyntaxViolation(SyntaxViolation::ExpectedDoubleSlash))]
#[test_case("memory://#/~", UrlError::JsonFragmentError(String::from("~")))]
#[test_case("memory://#/~a", UrlError::JsonFragmentError(String::from("~a")))]
#[test_case("memory://#/~0/~1/~c", UrlError::JsonFragmentError(String::from("~c")))]
fn test_parse_and_normalize_url_invalid_case(url_str: &str, expected_err: UrlError) {
assert_eq!(parse_and_normalize_url(url_str).unwrap_err(), expected_err);
}
}