feat(s3_bucket_downloader): add S3 bucket downloader tool

Cargo.toml

@@ -11,6 +11,7 @@ members = [
     "random_pairs_of_s3file",
     "find_log_processtime",
     "archive_dirs",
+    "s3_bucket_downloader",
     # Add other tools here
 ]
 resolver = "2"  # Add this line to specify resolver version 2

s3_bucket_downloader/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "s3_bucket_downloader"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+aws-config = "1.6.1"
+aws-sdk-s3 = "1.82.0"
+tokio = { version = "1.44.1", features = ["full"] }
+rayon = "1.10"
+futures = "0.3.31"
+indicatif = "0.17.11"
+clap = { version = "4.5.34", features = ["derive"] }

s3_bucket_downloader/src/main.rs

@@ -0,0 +1,296 @@
+use aws_config::meta::region::RegionProviderChain;
+use aws_config::retry::RetryConfig;
+use aws_sdk_s3::primitives::ByteStream;
+use aws_sdk_s3::Client;
+use clap::Parser;
+use indicatif::{MultiProgress, ProgressBar, ProgressStyle};
+use rayon::prelude::*;
+use std::fs::{self, File};
+use std::io::Result;
+use std::io::{BufRead, BufReader, Write};
+use std::path::PathBuf;
+use std::sync::{
+    atomic::{AtomicUsize, Ordering},
+    Arc,
+};
+use std::time::Duration;
+use tokio::runtime::Runtime;
+
+const BINARY: bool = true;
+
+fn format_size(size: u64, binary: bool) -> String {
+    let units = if binary {
+        ["B", "KiB", "MiB", "GiB", "TiB"]
+    } else {
+        ["B", "KB", "MB", "GB", "TB"]
+    };
+    let base = if binary { 1024.0 } else { 1000.0 };
+    let mut size = size as f64;
+    let mut unit_index = 0;
+
+    while size >= base && unit_index < units.len() - 1 {
+        size /= base;
+        unit_index += 1;
+    }
+
+    format!("{:.2} {}", size, units[unit_index])
+}
+
+/// S3 Downloader: Download all files from an S3 bucket with multiple threads.
+#[derive(Parser, Debug)]
+#[command(author, version, about, long_about = None)]
+struct Args {
+    /// S3 bucket name
+    #[arg(short, long)]
+    bucket: String,
+
+    /// Local directory to download to
+    #[arg(short, long)]
+    output: String,
+
+    /// Number of worker threads
+    #[arg(short, long, default_value_t = 4)]
+    workers: usize,
+
+    /// Maximum number of retries for failed downloads
+    #[arg(short, long, default_value_t = 3)]
+    retries: u32,
+
+    /// File containing list of files to download (one per line)
+    #[arg(short, long)]
+    file_list: Option<String>,
+}
+
+#[tokio::main]
+async fn main() {
+    let args = Args::parse();
+
+    let bucket_name = args.bucket;
+    let local_dir = PathBuf::from(args.output);
+    let num_workers = args.workers;
+    let max_retries = args.retries;
+
+    if !local_dir.exists() {
+        fs::create_dir_all(&local_dir).expect("Failed to create output directory");
+    }
+
+    let region_provider = RegionProviderChain::default_provider().or_else("us-east-1");
+    let config = aws_config::defaults(aws_config::BehaviorVersion::latest())
+        .region(region_provider)
+        .retry_config(RetryConfig::standard().with_max_attempts(max_retries))
+        .load()
+        .await;
+    let client = Arc::new(Client::new(&config));
+
+    // Default file list name based on bucket
+    let default_file_list = format!("{}.files.txt", bucket_name);
+
+    // Get list of files to download
+    let keys = if let Some(file_list) = args.file_list {
+        println!("Reading file list from: {}", file_list);
+        let file = File::open(&file_list).expect("Failed to open file list");
+        let reader = BufReader::new(file);
+        reader.lines().map_while(Result::ok).collect()
+    } else if PathBuf::from(&default_file_list).exists() {
+        println!("Reading cached file list from: {}", default_file_list);
+        let file = File::open(&default_file_list).expect("Failed to open cached file list");
+        let reader = BufReader::new(file);
+        reader.lines().map_while(Result::ok).collect()
+    } else {
+        println!("Listing objects in bucket: {}", bucket_name);
+        let keys = list_objects(&client, &bucket_name).await;
+
+        // Always save the file list
+        println!("Saving file list to: {}", default_file_list);
+        let mut file = File::create(&default_file_list).expect("Failed to create file list");
+        for key in &keys {
+            writeln!(file, "{}", key).expect("Failed to write to file list");
+        }
+        println!("File list saved successfully");
+
+        keys
+    };
+
+    println!(
+        "Found {} files. Starting downloads with {} threads...",
+        keys.len(),
+        num_workers
+    );
+    rayon::ThreadPoolBuilder::new()
+        .num_threads(num_workers)
+        .build_global()
+        .unwrap();
+
+    let m = Arc::new(MultiProgress::new());
+    let downloaded = Arc::new(AtomicUsize::new(0));
+    let failed = Arc::new(AtomicUsize::new(0));
+    let downloaded_size = Arc::new(AtomicUsize::new(0));
+
+    // Create overall progress bar
+    let total_pb = m.add(ProgressBar::new(keys.len() as u64));
+    total_pb.set_style(
+        ProgressStyle::with_template(
+            "{spinner} [{elapsed_precise}] [{bar:40.cyan/blue}] {pos}/{len} ({percent}%) {msg}",
+        )
+        .unwrap(),
+    );
+
+    // Calculate files per thread
+    let files_per_thread = keys.len().div_ceil(num_workers);
+
+    // Create fixed progress bars for each thread
+    let thread_pbs: Vec<_> = (0..num_workers)
+        .map(|i| {
+            let pb = m.add(ProgressBar::new(files_per_thread as u64));
+            pb.set_style(
+                ProgressStyle::with_template("[{thread}] {spinner} [{elapsed_precise}] [{bar:40.yellow/blue}] {pos}/{len} ({percent}%) {msg}")
+                    .unwrap()
+            );
+            pb.set_message(format!("Thread {}: Starting", i + 1));
+            pb
+        })
+        .collect();
+
+    keys.par_iter().enumerate().for_each(|(i, key)| {
+        let client = Arc::clone(&client);
+        let bucket = bucket_name.clone();
+        let dir = local_dir.clone();
+        let key = key.clone();
+        let downloaded = Arc::clone(&downloaded);
+        let failed = Arc::clone(&failed);
+        let downloaded_size = Arc::clone(&downloaded_size);
+        let total_pb = total_pb.clone();
+        let thread_num = i % num_workers;
+        let thread_pb = thread_pbs[thread_num].clone();
+
+        let rt = Runtime::new().unwrap();
+        rt.block_on(async move {
+            let local_path = dir.join(&key);
+            if let Some(parent) = local_path.parent() {
+                fs::create_dir_all(parent).expect("Failed to create parent directory");
+            }
+
+            match download_object_with_retry(&client, &bucket, &key, max_retries).await {
+                Ok(bytes) => {
+                    let mut file = File::create(&local_path).expect("Failed to create file");
+                    file.write_all(&bytes).expect("Failed to write file");
+                    downloaded.fetch_add(1, Ordering::SeqCst);
+                    downloaded_size.fetch_add(bytes.len(), Ordering::SeqCst);
+                    total_pb.inc(1);
+                    thread_pb.inc(1);
+                    thread_pb.set_message(format!(
+                        "Thread {}: Downloaded {}/{} files",
+                        thread_num + 1,
+                        downloaded.load(Ordering::SeqCst),
+                        files_per_thread
+                    ));
+                }
+                Err(_e) => {
+                    failed.fetch_add(1, Ordering::SeqCst);
+                    total_pb.inc(1);
+                    thread_pb.inc(1);
+                    thread_pb.set_message(format!(
+                        "Thread {}: Failed {}/{} files",
+                        thread_num + 1,
+                        failed.load(Ordering::SeqCst),
+                        files_per_thread
+                    ));
+                }
+            }
+        });
+    });
+
+    // Clean up all progress bars
+    for pb in thread_pbs {
+        pb.finish_and_clear();
+    }
+    total_pb.finish_with_message("Download complete");
+    println!(
+        "✅ Total files downloaded: {}",
+        downloaded.load(Ordering::SeqCst)
+    );
+    println!("❌ Total files failed: {}", failed.load(Ordering::SeqCst));
+    println!(
+        "📦 Total data downloaded: {}",
+        format_size(downloaded_size.load(Ordering::SeqCst) as u64, BINARY)
+    );
+}
+
+async fn list_objects(client: &Client, bucket: &str) -> Vec<String> {
+    let mut keys = Vec::new();
+    let mut continuation_token = None;
+
+    loop {
+        let mut req = client.list_objects_v2().bucket(bucket.to_string());
+        if let Some(token) = continuation_token {
+            req = req.continuation_token(token);
+        }
+
+        match req.send().await {
+            Ok(resp) => {
+                if let Some(contents) = resp.contents {
+                    for obj in contents {
+                        if let Some(key) = obj.key {
+                            keys.push(key);
+                        }
+                    }
+                }
+
+                if resp.is_truncated.unwrap_or(false) {
+                    continuation_token = resp.next_continuation_token;
+                } else {
+                    break;
+                }
+            }
+            Err(_e) => {
+                eprintln!("Failed to list objects: {:?}", _e);
+                break;
+            }
+        }
+    }
+
+    keys
+}
+
+async fn download_object_with_retry(
+    client: &Client,
+    bucket: &str,
+    key: &str,
+    max_retries: u32,
+) -> Result<Vec<u8>> {
+    let mut retry_count = 0;
+    let mut last_error = None;
+
+    while retry_count <= max_retries {
+        match download_object(client, bucket, key).await {
+            Ok(bytes) => return Ok(bytes),
+            Err(e) => {
+                last_error = Some(e);
+                retry_count += 1;
+                if retry_count <= max_retries {
+                    tokio::time::sleep(Duration::from_secs(2u64.pow(retry_count))).await;
+                }
+            }
+        }
+    }
+
+    Err(last_error.unwrap_or_else(|| std::io::Error::other("Unknown error")))
+}
+
+async fn download_object(client: &Client, bucket: &str, key: &str) -> Result<Vec<u8>> {
+    let resp = client
+        .get_object()
+        .bucket(bucket)
+        .key(key)
+        .send()
+        .await
+        .map_err(std::io::Error::other)?;
+    let data: ByteStream = resp.body;
+    let bytes = data
+        .collect()
+        .await
+        .map_err(std::io::Error::other)?
+        .into_bytes()
+        .to_vec();
+    Ok(bytes)
+}