Struct DownloadMeta 

pub struct DownloadMeta {
    pub content_type: Option<String>,
    pub etag: Option<String>,
    pub last_modified: Option<String>,
    pub expected_size: Option<u64>,
    pub suggested_filename: Option<String>,
    pub download_start: Option<DateTime<Utc>>,
    pub checksum: Option<FileChecksum>,
}

Fields

content_type: Option<String>

从Content-Type头获取的MIME类型

etag: Option<String>

服务器返回的ETag（用于缓存验证）

last_modified: Option<String>

最后修改时间（Last-Modified头）

expected_size: Option<u64>

通过Content-Length获取的预期大小

suggested_filename: Option<String>

从Content-Disposition解析的文件名

download_start: Option<DateTime<Utc>>

下载开始时间戳

checksum: Option<FileChecksum>

文件校验信息（可后续填充）

Implementations

impl DownloadMeta

pub fn from_headers(headers: &HeaderMap) -> Self

从HTTP响应头生成元数据

Trait Implementations

impl Clone for DownloadMeta

fn clone(&self) -> DownloadMeta

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DownloadMeta

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DownloadMeta

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for DownloadMeta

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.