Enum ByteRangeSpec

pub enum ByteRangeSpec {
    FromTo(u64, u64),
    AllFrom(u64),
    Last(u64),
}

Each Range::Bytes header can contain one or more ByteRangeSpecs. Each ByteRangeSpec defines a range of bytes to fetch

Variants

FromTo(u64, u64)

Get all bytes between x and y (“x-y”)

AllFrom(u64)

Get all bytes starting from x (“x-”)

Last(u64)

Get last x bytes (“-x”)

Implementations

impl ByteRangeSpec

pub fn to_satisfiable_range(&self, full_length: u64) -> Option<(u64, u64)>

Given the full length of the entity, attempt to normalize the byte range into an satisfiable end-inclusive (from, to) range.

The resulting range is guaranteed to be a satisfiable range within the bounds of 0 <= from <= to < full_length.

If the byte range is deemed unsatisfiable, None is returned. An unsatisfiable range is generally cause for a server to either reject the client request with a 416 Range Not Satisfiable status code, or to simply ignore the range header and serve the full entity using a 200 OK status code.

This function closely follows RFC 7233 section 2.1. As such, it considers ranges to be satisfiable if they meet the following conditions:

If a valid byte-range-set includes at least one byte-range-spec with a first-byte-pos that is less than the current length of the representation, or at least one suffix-byte-range-spec with a non-zero suffix-length, then the byte-range-set is satisfiable. Otherwise, the byte-range-set is unsatisfiable.

The function also computes remainder ranges based on the RFC:

If the last-byte-pos value is absent, or if the value is greater than or equal to the current length of the representation data, the byte range is interpreted as the remainder of the representation (i.e., the server replaces the value of last-byte-pos with a value that is one less than the current length of the selected representation).

Trait Implementations

impl Clone for ByteRangeSpec

fn clone(&self) -> ByteRangeSpec

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ByteRangeSpec

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for ByteRangeSpec

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl FromStr for ByteRangeSpec

type Err = Error

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<ByteRangeSpec>

Parses a string s to return a value of this type.

impl PartialEq for ByteRangeSpec

fn eq(&self, other: &ByteRangeSpec) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ByteRangeSpec