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Merge branch 'release/new-year-version'

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mandlm 2019-05-05 12:43:54 +02:00
commit a2c04a9807
9 changed files with 165 additions and 11 deletions
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2
.gitignore vendored Normal file
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__pycache__/
.*

6
config.py Normal file
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imgdir = "."
recursive = True
refresh = 5
cachedir = "auto"
resolution = (1920, 1080)
filetypes = ["*.jpg", "*.JPG"]

3
requirements.txt
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Flask==1.0.2 Flask==1.0.2
Pillow==5.3.0
Click==7.0
waitress==1.1.0

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server.py Executable file
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#!/usr/bin/python3
from waitress import serve
import slider
serve(slider.app, host="0.0.0.0", port=5000)

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slider.py
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#!/usr/bin/python3 #!/usr/bin/python3
from flask import Flask, render_template from flask import (
from random import randint Flask,
render_template,
send_from_directory,
redirect,
url_for,
request,
)
from random import choice
from pathlib import Path
from PIL import Image
from time import time
from hashlib import sha256
import click
from shutil import rmtree
from tempfile import gettempdir
import config
app = Flask(__name__) app = Flask(__name__)
imgdir = Path(config.imgdir).expanduser().resolve()
cache_resolution = config.resolution
cache_dir = (
Path(gettempdir()) / "webslider"
if config.cachedir == "auto"
else Path(config.cachedir)
) / ("%sx%s" % cache_resolution)
def find_images():
images = set()
for filetype in config.filetypes:
glob = "**/" + filetype if config.recursive else filetype
images.update(imgdir.glob(glob))
return list(images)
@app.route("/") @app.route("/")
def hello(): def random():
return render_template("hello.html", num=randint(1, 23)) print(request.remote_addr, request.base_url)
return render_template("random.html", refresh=config.refresh)
@app.route("/random_image/")
def random_image():
print(request.remote_addr, request.base_url)
try:
last_modified_time, last_modified_file = max(
(f.stat().st_mtime, f) for f in find_images()
)
if time() - last_modified_time <= 60:
selected_image = last_modified_file.relative_to(imgdir)
else:
images = find_images()
selected_image = choice(images).relative_to(imgdir)
except ValueError:
return redirect(url_for("static", filename="clear.gif"))
return redirect(
url_for("image", filename=selected_image)
+ "?hash=%s" % get_cache_filename(selected_image)
)
@app.route("/img/<path:filename>")
def image(filename):
print(request.remote_addr, request.base_url)
cache_filename = create_cache_file(filename)
return send_from_directory(cache_dir, cache_filename)
def rm_cachedir():
if cache_dir.exists():
print("Removing cache dir", cache_dir)
rmtree(cache_dir)
def create_cachedir():
if not cache_dir.exists():
print("Creating cache dir", cache_dir)
cache_dir.mkdir(parents=True)
def create_cache_file(filename):
create_cachedir()
cache_file = get_cache_filename(filename)
if not (cache_dir / cache_file).exists():
print("Creating cache file", filename)
img = Image.open(imgdir / filename)
img.thumbnail(cache_resolution)
img.save(cache_dir / cache_file, "JPEG")
return cache_file
def get_cache_filename(filename):
original_file_path = imgdir / filename
return sha256(str(original_file_path.resolve()).encode("utf-8")).hexdigest()
def pre_cache_images():
for image_file in sorted(find_images()):
create_cache_file(image_file.relative_to(imgdir))
@click.command()
@click.option("--build-cache", is_flag=True, default=False, help="pre-cache images")
@click.option(
"--clear-cache", is_flag=True, default=False, help="clear cache directory"
)
def run_slider(build_cache, clear_cache):
if clear_cache:
rm_cachedir()
if build_cache:
pre_cache_images()
app.run(host="0.0.0.0")
if __name__ == "__main__": if __name__ == "__main__":
app.run() run_slider()

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templates/hello.html
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<html>
<body>
<p>Hello slider number {{ num }}!</p>
<p><img src="{{ url_for("static", filename="cat.jpg") }}"></p>
</body>
</html>

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templates/random.html Normal file
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<html>
<head>
<style>
img {
width: 100%;
height: 98%;
object-fit: contain;
background: url({{ url_for("static", filename="loading.gif") }}) 50% no-repeat;
}
</style>
</head>
<body bgcolor="black">
<img id="slider" src="{{ url_for("static", filename="clear.gif") }}" />
<script>
var downloadingImage = new Image();
downloadingImage.onload = function()
{
document.getElementById("slider").src = this.src;
};
function updateImage()
{
downloadingImage.src = "{{ url_for("random_image") }}?" + new Date().getTime();
}
updateImage();
setInterval(updateImage, {{ refresh * 1000 }});
</script>
</body>
</html>