6f02d43ae0
The `header::Formatter` ensures that a formatted header is written to a line, and allows for headers that require multiple lines. The only header to specifically require this is `Set-Cookie`. BREAKING CHANGE: The `fmt_header` method has changed to take a different formatter. In most cases, if your header also implements `fmt::Display`, you can just call `f.fmt_line(self)`.
67 lines
1.8 KiB
Rust
67 lines
1.8 KiB
Rust
use std::fmt;
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use std::str;
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use unicase::UniCase;
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use header::{Header, Raw};
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/// The `Expect` header.
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///
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/// > The "Expect" header field in a request indicates a certain set of
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/// > behaviors (expectations) that need to be supported by the server in
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/// > order to properly handle this request. The only such expectation
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/// > defined by this specification is 100-continue.
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/// >
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/// > Expect = "100-continue"
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///
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/// # Example
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/// ```
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/// use hyper::header::{Headers, Expect};
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/// let mut headers = Headers::new();
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/// headers.set(Expect::Continue);
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/// ```
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#[derive(Copy, Clone, PartialEq, Debug)]
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pub enum Expect {
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/// The value `100-continue`.
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Continue
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}
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const EXPECT_CONTINUE: UniCase<&'static str> = UniCase("100-continue");
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impl Header for Expect {
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fn header_name() -> &'static str {
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static NAME: &'static str = "Expect";
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NAME
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}
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fn parse_header(raw: &Raw) -> ::Result<Expect> {
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if let Some(line) = raw.one() {
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let text = unsafe {
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// safe because:
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// 1. we don't actually care if it's utf8, we just want to
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// compare the bytes with the "case" normalized. If it's not
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// utf8, then the byte comparison will fail, and we'll return
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// None. No big deal.
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str::from_utf8_unchecked(line)
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};
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if UniCase(text) == EXPECT_CONTINUE {
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Ok(Expect::Continue)
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} else {
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Err(::Error::Header)
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}
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} else {
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Err(::Error::Header)
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}
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}
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fn fmt_header(&self, f: &mut ::header::Formatter) -> fmt::Result {
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f.fmt_line(self)
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}
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}
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impl fmt::Display for Expect {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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f.write_str("100-continue")
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}
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}
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