Struct FetchResult 

#[non_exhaustive]
pub struct FetchResult {
    pub source: String,
    pub license: String,
    pub pdf_bytes: Option<Bytes>,
    pub final_url: Option<Url>,
    pub metadata_json: Option<Value>,
}

What a successful fetch returns to the caller.

Whether pdf_bytes is None depends on the source: metadata-only sources (Phase 4) leave it unset; OA sources (Phase 1) return PDF bytes when an OA URL was discovered.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

source: String

Source’s name (matches Source::name()); set for the audit trail.

license: String

OA license string ("CC-BY-4.0", "unknown", etc.).

pdf_bytes: Option<Bytes>

PDF bytes; None for metadata-only sources.

final_url: Option<Url>

Final URL after redirect resolution; useful for the metadata [doiget].url field.

metadata_json: Option<Value>

Source-side metadata payload as a serde_json value. The Source impl is responsible for the shape; the caller (Phase 1+ orchestrator) maps it into Metadata when one exists (Phase 1+).

Trait Implementations

impl Clone for FetchResult

fn clone(&self) -> FetchResult

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FetchResult

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

Formats the value using the given formatter.