Struct Downloader 

pub struct Downloader { /* private fields */ }

Implementations

impl Downloader

pub fn new(timeout_secs: u64, concurrency: u32) -> Self

pub async fn download_file( &self, item: &DownloadItem, ) -> Result<(), LaunchError>

Download a single file. No progress events are emitted.

pub async fn download_multiple( &self, items: Vec<DownloadItem>, event_tx: Sender<LaunchEvent>, ) -> Result<(), LaunchError>

Download many files concurrently, emitting LaunchEvent progress notifications on event_tx.

Events emitted:

• Progress { downloaded, total, kind } — file-count progress after each file completes, where downloaded = files done, total = total files.
• Speed(bytes_per_sec) — rolling 5-second average.
• Estimated(secs) — ETA in seconds at the current speed.

pub async fn check_url(&self, url: &str) -> bool

Returns true if a HEAD request to url succeeds with a 2xx status.

pub async fn check_mirror(&self, mirrors: &[&str], path: &str) -> Option<String>

Iterate mirrors in order, appending path, and return the first URL that responds successfully to a HEAD request. Returns None if all mirrors are unreachable.