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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:
# Submit up to `chunk_size` tasks at a time to avoid too many pending tasks.
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()
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