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