View to list all images in collection (#3)

* Cache generation instead of views

This way, query params are kept cached.

* Add view to list all images

Caddyfile

@@ -1,4 +1,4 @@
 placeany.site {
-	encode zstd gzip
-    reverse_proxy http://localhost:5099
+    encode zstd gzip
+    reverse_proxy http://localhost:8080
 }

Containerfile

@@ -12,5 +12,5 @@ COPY wsgi.py wsgi.py
 
 VOLUME images
 
-ENTRYPOINT waitress-serve --host 127.0.0.1 --port 5099 wsgi:app
+ENTRYPOINT waitress-serve wsgi:app
 

Containerfile.aio

@@ -14,5 +14,5 @@ FROM app AS imgs
 ARG images
 copy ${images} images
 
-ENTRYPOINT waitress-serve --host 127.0.0.1 --port 5099 wsgi:app
+ENTRYPOINT waitress-serve wsgi:app
 

README.md

@@ -4,10 +4,20 @@ A quick and simple service for getting pictures of whatever-you-want
 for use as placeholders in your designs or code. Just put your image
 size (width & height) after the URL and you'll get a placeholder.
 
-Similar URL API as [Placekitten]([http://placekitten.com](https://web.archive.org/web/20110504042732/http://placekitten.com/)).
+There is also a bookmarklet service which enhances sites with many images.
 
-There is also a bookmarklet service which works the same as
-[Horse_ebookmarklet]([http://www.heyben.com/horse_ebookmarklet/](https://web.archive.org/web/20120223050454/http://www.heyben.com/horse_ebookmarklet/)).
+Inspirations:
+
+- https://web.archive.org/web/20110504042732/http://placekitten.com/
+- https://web.archive.org/web/20120223050454/http://www.heyben.com/horse_ebookmarklet/.
+
+## Example calls
+
+Generates an image, 200px wide and 300px tall:  
+http://localhost:8080/200/300
+
+Generates an image in grayscale, 200px wide and 300px tall:  
+http://localhost:8080/g/200/300
 
 ## Installation
 
@@ -22,29 +32,43 @@ First, create an image collection.
 1. Go to the code: `cd path/to/holder`. Copy `images` folder to it.
 1. Create and activate a virtualenv.
 1. Get dependencies in place: `pip install -r requirements.txt`
-1. Start the app: `waitress-serve --host 127.0.0.1 --port 5099 wsgi:app`
-1. Go to [http://localhost:5099](http://localhost:5099) in your web browser.
+1. Start the app: `waitress-serve wsgi:app`
+1. Go to [http://localhost:8080](http://localhost:8080) in your web browser.
 1. Done!
 
 ### Run as Container
 
 The most easy and portable way to use this is to use Docker or Podman.
-In this build, waitress is used for production readyness. Port 5099 is
-instead used.
+In this build, waitress is used for production readyness.
 
     podman build .
-    podman run -it -p 5099:5099 -v ./images:/app/images <container id>
+    podman run -it -p 8080:8080 -v ./images:/app/images <container id>
 
 If you wish to embed images in container as well, use alternate
 Containerfile.
 
     podman build -f Containerfile.aio --build-arg images=./images .
-    podman run -it -p 5099:5099 <container id>
+    podman run -it -p 8080:8080 <container id>
 
-## Example calls
+### Run behind reverse proxy
 
-    # generates an image, 200px wide and 300px tall
-    http://localhost:5000/200/300
+A reverse proxy in front of placeany is recommended. An example
+Caddyfile is available to make https "just work", but Nginx+certbot
+will be equally fine.
 
-    # generates an image in grayscale, 200px wide and 300px tall
-    http://localhost:5000/g/200/300
+## Podman tip: generate systemd files
+
+Make sure to enable lingering user processes.
+
+    loginctl enable-linger $USER
+
+Then, create and change directory to systemd.
+
+    mkdir -p .config/systemd/user
+    cd .config/systemd/user
+
+Now, generate the systemd user service.
+
+    podman generate systemd --new -f -n placeany
+
+Your container can now be enabled and started.

templates/index.html

@@ -37,10 +37,9 @@
       <h1>placeany</h1>
       <p>A quick and simple service for getting pictures for use as placeholders in your designs or code.
         Just put your image size (width &amp; height) after our URL and you'll get a placeholder.</p>
-      <pre><output>Examples:
-          <a href="/200/300">{{ url }}/200/300</a>
-          <a href="/g/200/300">{{ url }}/g/200/300</a>
-        </output></pre>
+      <output>Like this: <a href="/200/300">{{ url }}/200/300</a>
+        <br>or: <a href="/g/200/300">{{ url }}/g/200/300</a>
+      </output>
     </article>
     <div class="unit">
       <img src="/450/230" alt="">
@@ -67,4 +66,4 @@
   </footer>
 </body>
 
-</html>
+</html>

templates/list.html

@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+  <meta charset="utf-8">
+  <title>placeany</title>
+  <style>
+    body {
+      width: 900px;
+      margin: 100px auto;
+    }
+
+    img {
+      display: block;
+    }
+
+    .grid {
+      display: flex;
+      gap: 1em;
+      flex-wrap: wrap;
+    }
+  </style>
+</head>
+
+<body>
+  <main>
+    <h1>placeany</h1>
+    <p>The following images are used on this placeany instance.
+      You may request a specific image by adding <b>?image=n</b> to your request
+      (where <b>n</b> is the number of the image you want), or filter the options
+      by adding multiple values like this: <b>?image=n1x&amp;image=n2&amp;image=n3</b>.</p>
+    <div class="grid">
+      {% for n in range(count) %}
+      <div class="unit">
+        <img src="/125/125?image={{ n }}" alt="">
+      </div>
+      {% endfor %}
+    </div>
+  </main>
+  <hr>
+  <footer role="contentinfo">
+    Also available as a <a href="/bookmarklet">Bookmarklet Service</a>.<br>
+    Source on <a href="https://github.com/madr/placeany">GitHub</a>.
+  </footer>
+</body>
+
+</html>

wsgi.py

@@ -2,7 +2,7 @@ import os
 import random
 from io import BytesIO
 
-from flask import Flask, render_template, request, send_file
+from flask import Flask, Response, render_template, request, send_file
 from flask_caching import Cache
 from PIL import Image, ImageOps
 
@@ -10,6 +10,7 @@ app = Flask(__name__)
 
 GREY = "G"
 COLOR = "RGB"
+IMAGE_DIR = "./images"
 
 cache = Cache(config={"CACHE_TYPE": "SimpleCache"})
 
@@ -17,23 +18,45 @@ app = Flask(__name__)
 cache.init_app(app)
 
 
-def get_cropped_image(x, y, grey=False):
+@cache.memoize(1)
+def get_cropped_image(x, y, s, grey=False, retries=0):
     """crops a random image from collection"""
-    im_src = random.choice(os.listdir("./images"))
-    im = Image.open(f"images/{im_src}")
+    if retries > 10:
+        return None
+    options = os.listdir(IMAGE_DIR)
+    try:
+        selection = list(
+            filter(
+                lambda i: i in range(0, len(options)),
+                map(int, s),
+            )
+        )
+    except ValueError:
+        return None
+    match len(selection):
+        case 0:
+            im_src = random.choice(options)
+        case 1:
+            im_src = options[selection[0]]
+        case _:
+            im_src = options[random.choice(selection)]
+    im = Image.open(f"{IMAGE_DIR}/{im_src}")
     out = BytesIO()
     max_x, max_y = im.size
-    if x < max_x or y < max_y:
-        im = ImageOps.fit(im, (x, y))
+    if x > max_x and y > max_y:
+        return get_cropped_image(x, y, grey, retries + 1)
+    im = ImageOps.fit(im, (x, y))
     if grey:
         im = ImageOps.grayscale(im)
-    im.save(out, "WEBP", quality=50)
+    im.save(out, "WEBP", quality=80)
     out.seek(0)
     return out
 
 
-def make_response(x, y, color_mode=COLOR):
-    im = get_cropped_image(x, y, color_mode == GREY)
+def make_response(x, y, s, color_mode=COLOR):
+    im = get_cropped_image(x, y, s, color_mode == GREY)
+    if not im:
+        return Response(status=401)
     return send_file(im, mimetype="image/webp")
 
 
@@ -49,16 +72,20 @@ def bookmarklet():
     return render_template("bookmarklet.html", url=u)
 
 
+@app.route("/images")
+def collection():
+    c = len(os.listdir(IMAGE_DIR))
+    return render_template("list.html", count=c)
+
+
 @app.route("/<int:x>/<int:y>")
-@cache.cached(10)
 def generate(x, y):
-    return make_response(x, y, COLOR)
+    return make_response(x, y, request.args.getlist("image"), COLOR)
 
 
 @app.route("/g/<int:x>/<int:y>")
-@cache.cached(10)
 def generate_grey(x, y):
-    return make_response(x, y, GREY)
+    return make_response(x, y, request.args.getlist("image"), GREY)
 
 
 if __name__ == "__main__":