[−][src]Struct headers::IfRange
If-Range
header, defined in RFC7233
If a client has a partial copy of a representation and wishes to have an up-to-date copy of the entire representation, it could use the Range header field with a conditional GET (using either or both of If-Unmodified-Since and If-Match.) However, if the precondition fails because the representation has been modified, the client would then have to make a second request to obtain the entire current representation.
The If-Range
header field allows a client to "short-circuit" the
second request. Informally, its meaning is as follows: if the
representation is unchanged, send me the part(s) that I am requesting
in Range; otherwise, send me the entire representation.
ABNF
If-Range = entity-tag / HTTP-date
Example values
Sat, 29 Oct 1994 19:43:31 GMT
\"xyzzy\"
Examples
use headers::IfRange; use std::time::{SystemTime, Duration}; let fetched = SystemTime::now() - Duration::from_secs(60 * 60 * 24); let if_range = IfRange::date(fetched);
Implementations
impl IfRange
[src]
pub fn etag(tag: ETag) -> IfRange
[src]
Create an IfRange
header with an entity tag.
pub fn date(time: SystemTime) -> IfRange
[src]
Create an IfRange
header with a date value.
pub fn is_modified(
&self,
etag: Option<&ETag>,
last_modified: Option<&LastModified>
) -> bool
[src]
&self,
etag: Option<&ETag>,
last_modified: Option<&LastModified>
) -> bool
Checks if the resource has been modified, or if the range request can be served.
Trait Implementations
impl Clone for IfRange
[src]
impl Debug for IfRange
[src]
impl Header for IfRange
[src]
fn name() -> &'static HeaderName
[src]
fn decode<'i, I>(values: &mut I) -> Result<Self, Error> where
I: Iterator<Item = &'i HeaderValue>,
[src]
I: Iterator<Item = &'i HeaderValue>,
fn encode<E: Extend<HeaderValue>>(&self, values: &mut E)
[src]
impl PartialEq<IfRange> for IfRange
[src]
impl StructuralPartialEq for IfRange
[src]
Auto Trait Implementations
impl RefUnwindSafe for IfRange
impl Send for IfRange
impl Sync for IfRange
impl Unpin for IfRange
impl UnwindSafe for IfRange
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
[src]
T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
[src]
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]
T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
[src]
impl<T> From<T> for T
[src]
impl<T, U> Into<U> for T where
U: From<T>,
[src]
U: From<T>,
impl<T> Same<T> for T
[src]
type Output = T
Should always be Self
impl<T> ToOwned for T where
T: Clone,
[src]
T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
[src]
fn clone_into(&self, target: &mut T)
[src]
impl<T, U> TryFrom<U> for T where
U: Into<T>,
[src]
U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
[src]
U: TryFrom<T>,