Serve a random image from imgfolder on /random_image endpoint

config.py

@@ -1 +1 @@
-imgdir = "/home/mandlm/Foto Export/2018/09/2018-09-03"
+imgdir = "."

slider.py

@@ -1,7 +1,9 @@
 #!/usr/bin/python3
 
-from flask import Flask, render_template, send_from_directory
+from flask import Flask, render_template, send_from_directory, redirect, url_for
 from random import randint
+from os import listdir
+import random
 
 import config
 
@@ -13,6 +15,12 @@ def hello():
     return render_template("hello.html", num=randint(1, 23))
 
 
+@app.route("/random_image")
+def random_image():
+    filename = random.choice(listdir(config.imgdir))
+    return redirect(url_for("image", filename=filename))
+
+
 @app.route("/img/<path:filename>")
 def image(filename):
     return send_from_directory(config.imgdir, filename)

templates/hello.html

@@ -3,5 +3,6 @@
 	<p>Hello slider number {{ num }}!</p>
 	<p><img src="{{ url_for("static", filename="cat.jpg") }}"></p>
 	<p><a href="{{ url_for("image", filename="IMG_0001.jpg") }}">Image</a></p>
+	<p><a href="{{ url_for("random_image") }}">Random Image</a></p>
 </body>
 </html>