111 lines
2.8 KiB
Python
Executable File
111 lines
2.8 KiB
Python
Executable File
#!/usr/bin/python3
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from flask import Flask, render_template, send_from_directory, redirect, url_for
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from random import choice
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from pathlib import Path
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from PIL import Image
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from time import time
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from hashlib import sha256
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import click
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from shutil import rmtree
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from tempfile import gettempdir
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import config
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app = Flask(__name__)
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imgdir = Path(config.imgdir).expanduser().resolve()
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img_glob = "**/*.jpg" if config.recursive else "*.jpg"
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cache_resolution = config.resolution
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cache_dir = (
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Path(gettempdir()) / "webslider"
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if config.cachedir == "auto"
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else Path(config.cachedir)
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) / ("%sx%s" % cache_resolution)
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@app.route("/")
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def random():
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return render_template("random.html", refresh=config.refresh)
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@app.route("/random_image/")
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def random_image():
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try:
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last_modified_time, last_modified_file = max(
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(f.stat().st_mtime, f) for f in imgdir.glob(img_glob)
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)
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if time() - last_modified_time <= 60:
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selected_image = last_modified_file.relative_to(imgdir)
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else:
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images = list(imgdir.glob(img_glob))
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selected_image = choice(images).relative_to(imgdir)
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except ValueError:
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return redirect(url_for("static", filename="clear.gif"))
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return redirect(
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url_for("image", filename=selected_image)
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+ "?hash=%s" % get_cache_filename(selected_image)
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)
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@app.route("/img/<path:filename>")
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def image(filename):
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cache_filename = create_cache_file(filename)
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return send_from_directory(cache_dir, cache_filename)
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def rm_cachedir():
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if cache_dir.exists():
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print("Removing cache dir", cache_dir)
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rmtree(cache_dir)
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def create_cachedir():
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if not cache_dir.exists():
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print("Creating cache dir", cache_dir)
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cache_dir.mkdir(parents=True)
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def create_cache_file(filename):
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create_cachedir()
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cache_file = get_cache_filename(filename)
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if not (cache_dir / cache_file).exists():
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print("Creating cache file", filename)
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img = Image.open(imgdir / filename)
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img.thumbnail(cache_resolution)
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img.save(cache_dir / cache_file, "JPEG")
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return cache_file
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def get_cache_filename(filename):
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original_file_path = imgdir / filename
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return sha256(str(original_file_path.resolve()).encode("utf-8")).hexdigest()
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def pre_cache_images():
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for image_file in sorted(imgdir.glob(img_glob)):
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create_cache_file(image_file.relative_to(imgdir))
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@click.command()
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@click.option("--build-cache", is_flag=True, default=False, help="pre-cache images")
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@click.option(
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"--clear-cache", is_flag=True, default=False, help="clear cache directory"
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)
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def run_slider(build_cache, clear_cache):
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if clear_cache:
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rm_cachedir()
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if build_cache:
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pre_cache_images()
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app.run(host="0.0.0.0")
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if __name__ == "__main__":
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run_slider()
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