Struct ConditionalHeaders 

pub struct ConditionalHeaders {
    pub if_none_match: Option<ETagList>,
    pub if_match: Option<ETagList>,
    pub if_modified_since: Option<SystemTime>,
    pub if_unmodified_since: Option<SystemTime>,
}

Parsed conditional request headers.

Fields

if_none_match: Option<ETagList>

If-None-Match header (for conditional GET)

if_match: Option<ETagList>

If-Match header (for conditional PUT/DELETE)

if_modified_since: Option<SystemTime>

If-Modified-Since header

if_unmodified_since: Option<SystemTime>

If-Unmodified-Since header

Implementations

impl ConditionalHeaders

pub fn from_request(request: &HttpRequest) -> Self

Parse conditional headers from an HTTP request.

Lookups use the canonical casing only: HeaderMap::get compares names with eq_ignore_ascii_case, so a client sending if-none-match is matched by the same call that matches If-None-Match.

pub fn is_not_modified( &self, etag: Option<&ETag>, last_modified: Option<SystemTime>, ) -> bool

Check if the resource should return 304 Not Modified.

Returns true if:

• If-None-Match contains a matching ETag (weak comparison), or
• If-Modified-Since is after the resource’s last modification

pub fn precondition_failed( &self, etag: Option<&ETag>, last_modified: Option<SystemTime>, ) -> bool

Check if the precondition fails (should return 412).

Returns true if:

• If-Match is present and no ETag matches (strong comparison), or
• If-Unmodified-Since is before the resource’s last modification

Trait Implementations

impl Clone for ConditionalHeaders

fn clone(&self) -> ConditionalHeaders

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ConditionalHeaders

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

Formats the value using the given formatter.

impl Default for ConditionalHeaders

fn default() -> ConditionalHeaders

Returns the “default value” for a type.