Struct Attachment 

pub struct Attachment {
    pub id: String,
    pub format: String,
    pub bytes: u64,
    pub hash: String,
    pub source: Option<String>,
    pub data: Option<Arc<[u8]>>,
    pub inline_data: bool,
}

一个附件。id 是内容寻址的文件名：SHA-256 的前 32 位十六进制加扩展名（与 PDF、Office 的 导出文件名同一规则），同一内容只有一个 id。

Fields

id: String

format: String

格式（文件扩展名）：jpg、png、gif、webp、svg、jp2、tif、jb2……

bytes: u64

字节数。

hash: String

内容的 SHA-256（小写十六进制）。

source: Option<String>

来源：网页图片的原地址、Office 文档里的部件路径（与 Markdown 里的引用一致）；PDF 图片为空 （Markdown 里直接引用 images/<id>）。

data: Option<Arc<[u8]>>

文件内容。

inline_data: bool

Include Base64 data in human-readable output for the opt-in asset API.

Implementations

impl Attachment

pub fn new(data: Vec<u8>, format: &str, source: Option<String>) -> Self

由内容构造：算哈希、定 id。

pub fn with_hash( hash: String, format: &str, data: Vec<u8>, source: Option<String>, ) -> Self

已经算好哈希（PDF、Office 的导出）时直接构造。

pub fn mime(&self) -> &'static str

按格式给的 MIME 类型（下载接口的 Content-Type）。

Trait Implementations

impl Clone for Attachment

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Attachment

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

Formats the value using the given formatter.

impl Default for Attachment

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Attachment

fn deserialize<D: Deserializer<'de>>(d: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer.

impl Eq for Attachment

impl PartialEq for Attachment

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Attachment

fn serialize<S: Serializer>(&self, s: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Attachment