pipe_downloader_lib 0.4.4

use crate::PipeDownloader;
use std::path::Path;

/// Pipe Downloader Options.
#[derive(Debug, Clone)]
pub struct PipeDownloaderOptions {
    /// Size of download buffer in bytes, if memory is an issue, reduce this value
    /// If the download is slow, you can use smaller value and increase download threads.
    /// For the fast downloads buffer should be big to improve performance.
    pub chunk_size_downloader: usize,
    /// Size of the buffer used to decode the file
    pub chunk_size_decoder: usize,
    /// Limit speed per thread if needed
    pub max_download_speed: Option<usize>,
    /// Do not use CONTENT_RANGE header
    pub force_no_chunks: bool,
    /// Number of download threads/connections
    /// You can improve download speed by increasing this number,
    /// note that this will also increase memory usage
    pub download_threads: usize,
}

impl Default for PipeDownloaderOptions {
    fn default() -> Self {
        Self {
            chunk_size_downloader: 30_000_000,
            chunk_size_decoder: 10_000_000,
            max_download_speed: None,
            force_no_chunks: false,
            download_threads: 2,
        }
    }
}

impl PipeDownloaderOptions {
    /// Constructs downloader from given options.
    pub fn start_download(self, url: &str, target_path: &Path) -> anyhow::Result<PipeDownloader> {
        let mut pd = PipeDownloader::new(url, target_path, self);
        pd.start_download()?;
        Ok(pd)
    }
}