paperoni/src/main.rs

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Rust
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#[macro_use]
extern crate lazy_static;
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use std::fs::File;
use std::path::Path;
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use async_std::{fs::create_dir, fs::remove_dir_all, task};
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use epub_builder::{EpubBuilder, EpubContent, ZipLibrary};
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use structopt::StructOpt;
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use url::Url;
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mod cli;
mod extractor;
mod moz_readability;
use extractor::Extractor;
fn main() {
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let opt = cli::Opts::from_args();
if !opt.urls.is_empty() {
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println!("Downloading single article");
download(opt.urls);
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}
}
type HTMLResource = (String, String);
async fn fetch_url(url: &str) -> HTMLResource {
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let client = surf::Client::new();
println!("Fetching...");
// TODO: Add middleware for following redirects
(
url.to_string(),
client
.get(url)
.recv_string()
.await
.expect("Unable to fetch URL"),
)
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}
fn download(urls: Vec<String>) {
let mut async_url_tasks = Vec::with_capacity(urls.len());
for url in urls {
async_url_tasks.push(task::spawn(async move { fetch_url(&url).await }));
}
task::block_on(async {
for url_task in async_url_tasks {
let (url, html) = url_task.await;
println!("Extracting");
let mut extractor = Extractor::from_html(&html);
extractor.extract_content(&url);
if extractor.article().is_some() {
if !Path::new("res/").exists() {
create_dir("res/")
.await
.expect("Unable to create res/ output folder");
}
extractor
.download_images(&Url::parse(&url).unwrap())
.await
.expect("Unable to download images");
let file_name = format!("{}.epub", extractor.metadata().title());
let mut out_file = File::create(&file_name).unwrap();
let mut html_buf = Vec::new();
extractor
.article()
.unwrap()
.serialize(&mut html_buf)
.expect("Unable to serialize");
let html_buf = std::str::from_utf8(&html_buf).unwrap();
let html_buf = moz_readability::regexes::REPLACE_SELF_CLOSING_REGEX
.replace_all(html_buf, "$tag/>");
let mut epub = EpubBuilder::new(ZipLibrary::new().unwrap()).unwrap();
if let Some(author) = extractor.metadata().byline() {
epub.metadata("author", author).unwrap();
}
epub.metadata("title", extractor.metadata().title())
.unwrap();
epub.add_content(EpubContent::new("code.xhtml", html_buf.as_bytes()))
.unwrap();
for img in extractor.img_urls {
let file_path = format!("{}", &img.0);
let img_buf = File::open(file_path).expect("Can't read file");
epub.add_resource(img.0, img_buf, img.1.unwrap()).unwrap();
}
epub.generate(&mut out_file).unwrap();
println!("Cleaning up");
remove_dir_all("res/").await.unwrap();
println!("Created {:?}", file_name);
}
}
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})
}