Struct ObjectMeta 

pub struct ObjectMeta {
    pub etag: String,
    pub size: u64,
    pub crc64_b64: Option<String>,
    pub meta: HashMap<String, String>,
    pub last_modified_unix: Option<u64>,
    pub storage_class: Option<String>,
    pub version_id: Option<String>,
}

What HEAD/GET/publish return about an object.

Fields

etag: String

size: u64

crc64_b64: Option<String>

Full-object CRC-64/NVME in wire (base64) form, when the store has one (objects written by this tier always do).

meta: HashMap<String, String>

User metadata with backend prefixes stripped (bare keys, e.g. flint-gen).

last_modified_unix: Option<u64>

storage_class: Option<String>

Backend storage class (S3: None ≡ STANDARD). The A11 IA copy-source guard reads this: a non-Standard base pays retrieval on every CLEAN byte copied, silently inverting the tier’s saving — the flusher refuses BaseCopy from it.

version_id: Option<String>

The object VERSION this metadata describes, on a versioned bucket (boundary-verbs plan D7). S3 already returns x-amz-version-id on PUT and this crate used to discard it; gated citation needs it and therefore costs no extra request.

None means the backend returned no version id — an unversioned bucket, or a proxy that STRIPS the header. The second case is why gated mode probes for it and REFUSES rather than degrading: falling back to etag semantics on a key whose current version is uncited is precisely the torn view the mode exists to prevent.

Implementations

impl ObjectMeta

pub fn copy_source_allowed(&self) -> bool

May this object serve as a server-side copy source without per-byte retrieval charges? (A11’s IA copy-source guard.)

Trait Implementations

impl Clone for ObjectMeta

fn clone(&self) -> ObjectMeta

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ObjectMeta

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

Formats the value using the given formatter.

impl Eq for ObjectMeta

impl PartialEq for ObjectMeta

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ObjectMeta