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import io |
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import argparse |
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import concurrent.futures |
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import json |
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import os |
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import time |
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import urllib.error |
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import urllib.request |
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from tqdm import tqdm |
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parser = argparse.ArgumentParser() |
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parser.add_argument("--output_folder", type=str, default="V3Det") |
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parser.add_argument("--max_retries", type=int, default=3) |
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parser.add_argument("--max_workers", type=int, default=16) |
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args = parser.parse_args() |
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headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36'} |
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def cache(response): |
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f = io.BytesIO() |
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block_sz = 8192 |
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while True: |
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buffer = response.read(block_sz) |
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if not buffer: |
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break |
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f.write(buffer) |
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return f |
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def download_image(url, path, timeout): |
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result = { |
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"status": "", |
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"url": url, |
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"path": path, |
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} |
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cnt = 0 |
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while True: |
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try: |
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response = urllib.request.urlopen(urllib.request.Request(url=url, headers=headers), timeout=timeout) |
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image_path = os.path.join(args.output_folder, path) |
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os.makedirs(os.path.dirname(image_path), exist_ok=True) |
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f = cache(response) |
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with open(image_path, "wb") as fp: |
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fp.write(f.getvalue()) |
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result["status"] = "success" |
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except Exception as e: |
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if not isinstance(e, urllib.error.HTTPError): |
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cnt += 1 |
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if cnt <= args.max_retries: |
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continue |
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if isinstance(e, urllib.error.HTTPError): |
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result["status"] = "expired" |
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else: |
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result["status"] = "timeout" |
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break |
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return result |
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def main(): |
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start = time.time() |
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if os.path.exists(args.output_folder) and os.listdir(args.output_folder): |
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try: |
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c = input( |
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f"'{args.output_folder}' already exists and is not an empty directory, continue? (y/n) " |
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) |
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if c.lower() not in ["y", "yes"]: |
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exit(0) |
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except KeyboardInterrupt: |
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exit(0) |
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if not os.path.exists(args.output_folder): |
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os.makedirs(args.output_folder) |
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image_folder_path = os.path.join(args.output_folder, "images") |
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record_path = os.path.join(args.output_folder, "records.json") |
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record = {'success': [], 'expired': [], 'timeout': []} |
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if os.path.isfile(record_path): |
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try: |
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with open(record_path, encoding="utf8") as f: |
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record['success'] = json.load(f)['success'] |
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except: |
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pass |
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if not os.path.exists(image_folder_path): |
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os.makedirs(image_folder_path) |
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list_url = 'https://raw.githubusercontent.com/V3Det/v3det_resource/main/resource/download_list.txt' |
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response = urllib.request.urlopen(urllib.request.Request(url=list_url, headers=headers), timeout=10) |
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url_list = [url for url in response.read().decode('utf-8').split('\n') if len(url) > 0] |
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image2url = {} |
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for url in url_list: |
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response = urllib.request.urlopen(urllib.request.Request(url=url, headers=headers), timeout=10) |
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image2url.update(eval(response.read().decode('utf-8'))) |
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data = [] |
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rec_suc = set(record['success']) |
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for image, url in image2url.items(): |
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if image not in rec_suc: |
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data.append((url, image)) |
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with tqdm(total=len(data)) as pbar: |
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with concurrent.futures.ThreadPoolExecutor(max_workers=args.max_workers) as executor: |
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chunk_size = min(5000, args.max_workers * 500) |
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for i in range(0, len(data), chunk_size): |
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futures = [ |
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executor.submit(download_image, url, path, 10) |
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for url, path in data[i: i + chunk_size] |
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] |
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for future in concurrent.futures.as_completed(futures): |
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r = future.result() |
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record[r["status"]].append(r["path"]) |
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pbar.update(1) |
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with open(record_path, "w", encoding="utf8") as f: |
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json.dump(record, f, indent=2) |
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end = time.time() |
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print(f"consuming time {end - start:.1f} sec") |
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print(f"{len(record['success'])} images downloaded.") |
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print(f"{len(record['timeout'])} urls failed due to request timeout.") |
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print(f"{len(record['expired'])} urls failed due to url expiration.") |
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if len(record['success']) == len(image2url): |
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os.remove(record_path) |
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print('All images have been downloaded!') |
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else: |
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print('Please run this file again to download failed image!') |
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if __name__ == "__main__": |
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main() |
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