110 lines
2.9 KiB
Rust
110 lines
2.9 KiB
Rust
use crate::error::Error;
|
|
use std::str::FromStr;
|
|
|
|
#[derive(Clone)]
|
|
/// Wrapper type for a header line.
|
|
pub struct Header {
|
|
line: String,
|
|
index: usize,
|
|
}
|
|
|
|
impl ::std::fmt::Debug for Header {
|
|
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::result::Result<(), ::std::fmt::Error> {
|
|
write!(f, "{}", self.line)
|
|
}
|
|
}
|
|
|
|
impl Header {
|
|
pub fn new(name: &str, value: &str) -> Self {
|
|
let line = format!("{}: {}", name, value);
|
|
let index = name.len();
|
|
Header { line, index }
|
|
}
|
|
|
|
/// The header name.
|
|
///
|
|
/// ```
|
|
/// let header = "X-Forwarded-For: 127.0.0.1"
|
|
/// .parse::<ureq::Header>()
|
|
/// .unwrap();
|
|
/// assert_eq!("X-Forwarded-For", header.name());
|
|
/// ```
|
|
pub fn name(&self) -> &str {
|
|
&self.line.as_str()[0..self.index]
|
|
}
|
|
|
|
/// The header value.
|
|
///
|
|
/// ```
|
|
/// let header = "X-Forwarded-For: 127.0.0.1"
|
|
/// .parse::<ureq::Header>()
|
|
/// .unwrap();
|
|
/// assert_eq!("127.0.0.1", header.value());
|
|
/// ```
|
|
pub fn value(&self) -> &str {
|
|
&self.line.as_str()[self.index + 1..].trim()
|
|
}
|
|
|
|
/// Compares the given str to the header name ignoring case.
|
|
///
|
|
/// ```
|
|
/// let header = "X-Forwarded-For: 127.0.0.1"
|
|
/// .parse::<ureq::Header>()
|
|
/// .unwrap();
|
|
/// assert!(header.is_name("x-forwarded-for"));
|
|
/// ```
|
|
pub fn is_name(&self, other: &str) -> bool {
|
|
self.name().eq_ignore_ascii_case(other)
|
|
}
|
|
}
|
|
|
|
pub fn get_header<'a, 'b>(headers: &'b [Header], name: &'a str) -> Option<&'b str> {
|
|
headers.iter().find(|h| h.is_name(name)).map(|h| h.value())
|
|
}
|
|
|
|
pub fn get_all_headers<'a, 'b>(headers: &'b [Header], name: &'a str) -> Vec<&'b str> {
|
|
headers
|
|
.iter()
|
|
.filter(|h| h.is_name(name))
|
|
.map(|h| h.value())
|
|
.collect()
|
|
}
|
|
|
|
pub fn has_header(headers: &[Header], name: &str) -> bool {
|
|
get_header(headers, name).is_some()
|
|
}
|
|
|
|
pub fn add_header(headers: &mut Vec<Header>, header: Header) {
|
|
let name = header.name();
|
|
if !name.starts_with("x-") && !name.starts_with("X-") {
|
|
headers.retain(|h| h.name() != name);
|
|
}
|
|
headers.push(header);
|
|
}
|
|
|
|
impl FromStr for Header {
|
|
type Err = Error;
|
|
fn from_str(s: &str) -> Result<Self, Self::Err> {
|
|
//
|
|
let line = s.to_string();
|
|
let index = s.find(':').ok_or_else(|| Error::BadHeader)?;
|
|
|
|
// no value?
|
|
if index >= s.len() {
|
|
return Err(Error::BadHeader);
|
|
}
|
|
|
|
// https://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2
|
|
// The field value MAY be preceded by any amount of LWS, though a single SP is preferred.
|
|
let value_from = &s[index..];
|
|
let voff = match value_from.find(|c: char| !c.is_whitespace()) {
|
|
Some(n) => n,
|
|
None => 0,
|
|
};
|
|
|
|
let index = index + voff;
|
|
|
|
Ok(Header { line, index })
|
|
}
|
|
}
|