102 lines
2.6 KiB
Rust
102 lines
2.6 KiB
Rust
use ascii::{AsAsciiStr, AsciiString};
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use error::Error;
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use std::str::FromStr;
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#[derive(Clone)]
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/// Wrapper type for a header line.
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pub struct Header {
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line: AsciiString,
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index: usize,
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}
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impl ::std::fmt::Debug for Header {
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fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::result::Result<(), ::std::fmt::Error> {
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write!(f, "{}", self.line)
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}
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}
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impl Header {
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pub fn new(name: &str, value: &str) -> Self {
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let s = format!("{}: {}", name, value);
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let line = unsafe { s.as_ascii_str_unchecked().to_owned() };
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let index = name.len();
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Header { line, index }
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}
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/// The header name.
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///
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/// ```
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/// let header = "X-Forwarded-For: 127.0.0.1"
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/// .parse::<ureq::Header>()
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/// .unwrap();
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/// assert_eq!("X-Forwarded-For", header.name());
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/// ```
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pub fn name(&self) -> &str {
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&self.line.as_str()[0..self.index]
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}
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/// The header value.
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///
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/// ```
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/// let header = "X-Forwarded-For: 127.0.0.1"
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/// .parse::<ureq::Header>()
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/// .unwrap();
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/// assert_eq!("127.0.0.1", header.value());
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/// ```
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pub fn value(&self) -> &str {
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&self.line.as_str()[self.index + 1..].trim()
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}
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/// Compares the given str to the header name ignoring case.
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///
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/// ```
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/// let header = "X-Forwarded-For: 127.0.0.1"
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/// .parse::<ureq::Header>()
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/// .unwrap();
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/// assert!(header.is_name("x-forwarded-for"));
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/// ```
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pub fn is_name(&self, other: &str) -> bool {
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self.name().eq_ignore_ascii_case(other)
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}
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}
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pub fn get_header<'a, 'b>(headers: &'b Vec<Header>, name: &'a str) -> Option<&'b str> {
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headers.iter().find(|h| h.is_name(name)).map(|h| h.value())
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}
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pub fn get_all_headers<'a, 'b>(headers: &'b Vec<Header>, name: &'a str) -> Vec<&'b str> {
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headers
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.iter()
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.filter(|h| h.is_name(name))
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.map(|h| h.value())
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.collect()
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}
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pub fn has_header(headers: &Vec<Header>, name: &str) -> bool {
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get_header(headers, name).is_some()
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}
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pub fn add_header(headers: &mut Vec<Header>, header: Header) {
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if !header.name().to_lowercase().starts_with("x-") {
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let name = header.name();
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headers.retain(|h| h.name() != name);
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}
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headers.push(header);
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}
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impl FromStr for Header {
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type Err = Error;
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fn from_str(s: &str) -> Result<Self, Self::Err> {
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//
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let line = AsciiString::from_str(s).map_err(|_| Error::BadHeader)?;
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let index = s.find(":").ok_or_else(|| Error::BadHeader)?;
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// no value?
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if index >= s.len() {
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return Err(Error::BadHeader);
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}
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Ok(Header { line, index })
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}
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}
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