# Copyright (c), ETH Zurich and UNC Chapel Hill. # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions are met: # # * Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # # * Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # # * Neither the name of ETH Zurich and UNC Chapel Hill nor the names of # its contributors may be used to endorse or promote products derived # from this software without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE # POSSIBILITY OF SUCH DAMAGE. import argparse import datetime import multiprocessing import os import time import urllib.error import urllib.request import xml.etree.ElementTree as ElementTree from typing import Final import urllib2 import urlparse PER_PAGE: Final[int] = 500 SORT: Final[str] = "date-posted-desc" URL: Final[str] = ( "https://api.flickr.com/services/rest/?method=flickr.photos.search&" "api_key=%s&text=%s&sort=%s&per_page=%d&page=%d&min_upload_date=%s&" "max_upload_date=%s&format=rest&extras=url_o,url_l,url_c,url_z,url_n" ) MAX_PAGE_REQUESTS: Final[int] = 5 MAX_PAGE_TIMEOUT: Final[int] = 20 MAX_IMAGE_REQUESTS: Final[int] = 3 TIME_SKIP: Final[int] = 24 * 60 * 60 MAX_DATE: Final[float] = time.time() MIN_DATE: Final[float] = MAX_DATE - TIME_SKIP def parse_args() -> argparse.Namespace: parser = argparse.ArgumentParser() parser.add_argument("--search_text", required=True) parser.add_argument("--api_key", required=True) parser.add_argument("--image_path", required=True) parser.add_argument("--num_procs", type=int, default=10) parser.add_argument("--max_days_without_image", type=int, default=365) args = parser.parse_args() return args def compose_url( page: int, api_key: str, text: str, min_date: float, max_date: float ) -> str: return URL % ( api_key, text, SORT, PER_PAGE, page, str(min_date), str(max_date), ) def parse_page( page: int, api_key: str, text: str, min_date: float, max_date: float ) -> tuple[dict[str, str], tuple[dict[str, str], ...]]: f: urllib2.urlopen | None = None for _ in range(MAX_PAGE_REQUESTS): try: f = urllib2.urlopen( compose_url(page, api_key, text, min_date, max_date), timeout=MAX_PAGE_TIMEOUT, ) except TimeoutError: continue else: break if f is None: return { "pages": "0", "total": "0", "page": "0", "perpage": "0", }, tuple() response = f.read() root = ElementTree.fromstring(response) if root.attrib["stat"] != "ok": raise OSError metadata = root.find("photos") assert metadata is not None photos = tuple(photo.attrib for photo in root.iter("photo")) return metadata.attrib, photos class PhotoDownloader: def __init__(self, image_path: str) -> None: self.image_path: str = image_path def __call__(self, photo: dict[str, str]) -> None: # Find the URL corresponding to the highest image resolution. We will # need this URL here to determine the image extension (typically .jpg, # but could be .png, .gif, etc). url: str | None = None for url_suffix in ("o", "l", "k", "h", "b", "c", "z"): url_attr = f"url_{url_suffix}" if photo.get(url_attr) is not None: url = photo.get(url_attr) break if url is not None: # Note that the following statement may fail in Python 3. urlparse # may need to be replaced with urllib.parse. url_filename = urlparse.urlparse(url).path image_ext = os.path.splitext(url_filename)[1] image_name = f"{photo['id']}_{photo['secret']}{image_ext}" path = os.path.join(self.image_path, image_name) if not os.path.exists(path): print(url) for _ in range(MAX_IMAGE_REQUESTS): try: urllib.request.urlretrieve(url, path) except urllib.error.ContentTooShortError: continue else: break def main() -> None: args = parse_args() downloader = PhotoDownloader(args.image_path) pool = multiprocessing.Pool(processes=args.num_procs) num_pages = float("inf") page = 0 min_date = MIN_DATE max_date = MAX_DATE days_in_row = 0 search_text = args.search_text.replace(" ", "-") while num_pages > page: page += 1 metadata, photos = parse_page( page, args.api_key, search_text, min_date, max_date ) num_pages = int(metadata["pages"]) print(78 * "=") print("Page:\t\t", page, "of", num_pages) print("Min-Date:\t", datetime.datetime.fromtimestamp(min_date)) print("Max-Date:\t", datetime.datetime.fromtimestamp(max_date)) print("Num-Photos:\t", len(photos)) print(78 * "=") try: pool.map_async(downloader, photos).get(1e10) except KeyboardInterrupt: pool.close() pool.join() break if page >= num_pages: max_date -= TIME_SKIP min_date -= TIME_SKIP page = 0 if num_pages == 0: days_in_row = days_in_row + 1 num_pages = float("inf") print(" No images in", days_in_row, "days in a row") if days_in_row == args.max_days_without_image: break else: days_in_row = 0 if __name__ == "__main__": main()