cli: progress bar for image download

article_scraper/Cargo.toml

@@ -23,7 +23,6 @@ rust-embed="6.6"
 once_cell = "1.17"
 escaper = "0.1"
 futures = "0.3"
-byte-unit = "4.0"
 
 [dev-dependencies]
 env_logger = "0.10"

article_scraper/src/full_text_parser/mod.rs

@@ -959,10 +959,6 @@ impl FullTextParser {
             }
         }
 
-        if !found_something {
-            log::error!("no body found");
-        }
-
         Ok(found_something)
     }
 

article_scraper/src/images/mod.rs

@@ -2,16 +2,17 @@ pub use self::error::ImageDownloadError;
 use self::request::ImageRequest;
 use crate::util::Util;
 use base64::Engine;
-use byte_unit::Byte;
 use image::ImageOutputFormat;
 use libxml::parser::Parser;
 use libxml::tree::{Document, Node, SaveOptions};
 use libxml::xpath::Context;
+pub use progress::Progress;
 use reqwest::{Client, Url};
 use std::io::Cursor;
 use tokio::sync::mpsc::{self, Sender};
 
 mod error;
+mod progress;
 mod request;
 
 pub struct ImageDownloader {
@@ -27,13 +28,15 @@ impl ImageDownloader {
         &self,
         html: &str,
         client: &Client,
+        progress: Option<Sender<Progress>>,
     ) -> Result<String, ImageDownloadError> {
         let parser = Parser::default_html();
         let doc = parser
             .parse_string(html)
             .map_err(|_| ImageDownloadError::HtmlParse)?;
 
-        self.download_images_from_document(&doc, client).await?;
+        self.download_images_from_document(&doc, client, progress)
+            .await?;
 
         let options = SaveOptions {
             format: false,
@@ -52,6 +55,7 @@ impl ImageDownloader {
         &self,
         doc: &Document,
         client: &Client,
+        progress: Option<Sender<Progress>>,
     ) -> Result<(), ImageDownloadError> {
         let xpath_ctx = Context::new(doc).map_err(|()| {
             log::error!("Failed to create xpath context for document");
@@ -74,7 +78,7 @@ impl ImageDownloader {
             .filter_map(|r| r.ok())
             .collect::<Vec<_>>();
 
-        let size = res
+        let total_size = res
             .iter()
             .map(|(req, parent_req)| {
                 req.content_length() + parent_req.as_ref().map(|r| r.content_length()).unwrap_or(0)
@@ -95,16 +99,18 @@ impl ImageDownloader {
 
         tokio::spawn(async move {
             let mut received = 0_usize;
-            let size = Byte::from_bytes(size as u128);
-            let adjusted_size = size.get_appropriate_unit(true);
-            println!("downloading {adjusted_size}");
 
             while let Some(i) = rx.recv().await {
                 received += i;
 
-                let received_bytes = Byte::from_bytes(received as u128);
-                let received_adjusted = received_bytes.get_appropriate_unit(true);
-                println!("received {received_adjusted} / {adjusted_size}");
+                if let Some(progress) = progress.as_ref() {
+                    _ = progress
+                        .send(Progress {
+                            total_size,
+                            downloaded: received,
+                        })
+                        .await;
+                }
             }
         });
 
@@ -262,7 +268,7 @@ mod tests {
         let html = fs::read_to_string(r"./resources/tests/planetGnome/fedora31.html")
             .expect("Failed to read HTML");
         let result = image_dowloader
-            .download_images_from_string(&html, &Client::new())
+            .download_images_from_string(&html, &Client::new(), None)
             .await
             .expect("Failed to downalod images");
         let mut file = fs::File::create(r"./test_output/fedora31_images_downloaded.html")

article_scraper/src/images/progress.rs

@@ -0,0 +1,4 @@
+pub struct Progress {
+    pub total_size: usize,
+    pub downloaded: usize,
+}

article_scraper/src/lib.rs

@@ -5,6 +5,7 @@ mod full_text_parser;
 pub mod images;
 mod util;
 
+use crate::images::Progress;
 use article::Article;
 use error::ScraperError;
 pub use full_text_parser::config::ConfigEntry as FtrConfigEntry;
@@ -13,6 +14,7 @@ pub use full_text_parser::Readability;
 use images::ImageDownloader;
 use reqwest::Client;
 use std::path::Path;
+use tokio::sync::mpsc::Sender;
 
 pub struct ArticleScraper {
     full_text_parser: FullTextParser,
@@ -32,6 +34,7 @@ impl ArticleScraper {
         url: &url::Url,
         download_images: bool,
         client: &Client,
+        progress: Option<Sender<Progress>>,
     ) -> Result<Article, ScraperError> {
         let res = self.full_text_parser.parse(url, client).await?;
 
@@ -39,7 +42,7 @@ impl ArticleScraper {
             if let Some(document) = res.document.as_ref() {
                 let _image_res = self
                     .image_downloader
-                    .download_images_from_document(document, client)
+                    .download_images_from_document(document, client, progress)
                     .await;
             }
         }

article_scraper_cli/Cargo.toml

@@ -14,4 +14,5 @@ simplelog = "0.12"
 log = "0.4"
 url = "2.3"
 reqwest = { version = "0.11", features = ["json", "native-tls", "gzip", "brotli", "stream"] }
-tokio = { version = "1.27", features = ["macros", "fs", "io-util", "rt-multi-thread" ] }
+tokio = { version = "1.27", features = ["macros", "fs", "io-util", "rt-multi-thread" ] }
+indicatif = "0.17"

article_scraper_cli/src/main.rs

@@ -2,11 +2,14 @@ use std::path::Path;
 use std::{path::PathBuf, process::exit};
 
 use crate::args::{Args, Commands};
+use article_scraper::images::Progress;
 use article_scraper::{ArticleScraper, FtrConfigEntry, FullTextParser, Readability};
 use clap::Parser;
+use indicatif::{ProgressBar, ProgressState, ProgressStyle};
 use reqwest::header::HeaderMap;
 use reqwest::Client;
 use simplelog::{ColorChoice, Config, LevelFilter, TermLogger, TerminalMode};
+use tokio::sync::mpsc::{self, Sender};
 use url::Url;
 
 mod args;
@@ -58,8 +61,10 @@ async fn extract_full(source_url: String, download_images: bool, output: Option<
         }
     };
 
+    let tx = monitor_progress();
+
     let res = scraper
-        .parse(&source_url, download_images, &Client::new())
+        .parse(&source_url, download_images, &Client::new(), Some(tx))
         .await;
     let article = match res {
         Ok(article) => article,
@@ -205,3 +210,42 @@ async fn get_html(html_file: Option<PathBuf>, source_url: Option<String>) -> Str
         unreachable!()
     }
 }
+
+fn monitor_progress() -> Sender<Progress> {
+    let (tx, mut rx) = mpsc::channel::<Progress>(2);
+
+    tokio::spawn(async move {
+        let mut progress_bar: Option<ProgressBar> = None;
+
+        while let Some(progress) = rx.recv().await {
+            if let Some(progress_bar) = progress_bar.as_ref() {
+                if progress.downloaded >= progress.total_size {
+                    progress_bar.finish_with_message("done");
+                } else {
+                    progress_bar.set_position(progress.downloaded as u64);
+                }
+            } else {
+                let pb = ProgressBar::new(progress.total_size as u64);
+                pb.set_style(
+                    ProgressStyle::with_template(
+                        "[{elapsed_precise}] [{wide_bar:.cyan/blue}] {bytes}/{total_bytes} ({eta})",
+                    )
+                    .unwrap()
+                    .with_key(
+                        "eta",
+                        |state: &ProgressState, w: &mut dyn std::fmt::Write| {
+                            write!(w, "{:.1}s", state.eta().as_secs_f64()).unwrap()
+                        },
+                    )
+                    .progress_chars("#>-"),
+                );
+
+                pb.set_position(progress.downloaded as u64);
+
+                progress_bar = Some(pb);
+            }
+        }
+    });
+
+    tx
+}