Struct Downloader 

pub struct Downloader { /* private fields */ }

简化的下载器

Implementations

impl Downloader

pub fn new() -> Self

创建新的下载器

pub fn with_config(config: DownloadConfig) -> Self

使用指定配置创建下载器

Panics

Panics if the HTTP client cannot be created (should not happen with valid configuration)

pub async fn download<P: AsRef<Path>>( &self, url: &str, output_path: P, progress_reporter: Option<ProgressReporter>, ) -> DownloadResult<()>

下载文件（支持分片下载和多线程）

Errors

Returns an error if:

• Network request fails
• File I/O operations fail
• Download validation fails
• Server does not support range requests when chunked download is attempted

pub async fn get_file_size(&self, url: &str) -> DownloadResult<u64>

获取文件大小 获取文件大小

Errors

Returns an error if:

• Network request fails
• Server does not provide content-length header
• Content-length value is invalid

Trait Implementations

impl Clone for Downloader

fn clone(&self) -> Downloader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Downloader

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

Formats the value using the given formatter.

impl Default for Downloader

fn default() -> Self

Returns the “default value” for a type.