google-book-scraper 0.4.0

Tool and library for downloading the contents of books hosted on books.google.com for offline viewing.
Documentation 
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use std::{
    fs,
    io::{self, Read, Seek, Write},
};
use zip::write::SimpleFileOptions;

/// Creates a CBZ from images in a specified directory.
///
/// # Arguments
///
/// * `image_dir` - Directory where images to be converted into pages of CBZ exist.
/// * `target_filename` - Path to save CBZ to, including filename and extension.
pub fn create_cbz(image_dir: &str, target_filename: &str) -> io::Result<()> {
    let dir_entry = std::path::Path::new(target_filename);
    let file = std::fs::File::create(dir_entry)?;

    let mut zip = zip::ZipWriter::new(file);
    let options = SimpleFileOptions::default().compression_method(zip::CompressionMethod::Deflated);

    let mut entries: Vec<_> = fs::read_dir(image_dir)?
        .collect::<io::Result<_>>()?;
    entries.sort_by_key(|e| e.file_name());
    for dir_entry in entries {
        let mut file = std::fs::File::open(dir_entry.path())?;
        let filename = dir_entry.file_name().into_string().map_err(|file_name| {
            io::Error::new(
                io::ErrorKind::InvalidData,
                format!("image filename is not valid UTF-8: {:?}", file_name),
            )
        })?;
        file.seek(io::SeekFrom::Start(0))?;

        zip.start_file(filename, options)?;

        let mut buffer = Vec::new();
        file.read_to_end(&mut buffer)?;
        zip.write_all(&buffer)?;
    }

    zip.finish()?;
    Ok(())
}