working redirect

app.py

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+from flask import (
+        Flask,
+        redirect
+)
+# from markupsafe import escape
+from download_image_map import Parser
+from mirror_list import Mirror
+
+all_mirrors = ["https://mirrors.netix.net/armbian/dl/",
+               "https://mirrors.dotsrc.org/armbian-dl/",
+               "https://imola.armbian.com/"]
+
+mirror = Mirror(all_mirrors)
+parser = Parser('userdata.csv')
+dl_map = parser.parsed_data
+
+
+app = Flask(__name__)
+
+
+def get_redirect(path, IP):
+    split_path = path.split('/')
+    if len(split_path) == 2:
+        key = "{}/{}".format(split_path[0], split_path[1])
+        new_path = dl_map.get(key, path)
+        return "{}/{}".format(mirror.next(), new_path)
+    if path == '':
+        return mirror.next()
+    else:
+        print("path: {}".format(path))
+        return "{}/{}".format(mirror.next(), path)
+
+
+@app.route('/status')
+def status():
+    return "OK"
+
+
+@app.route('/', defaults={'path': ''})
+@app.route('/<path:path>')
+def catch_all(path):
+    return redirect(get_redirect(path, "127.0.0.1"), 302)

download_image_map.py

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+#!/usr/bin/env python
+import csv
+class Parser():
+    def __init__(self, csv_file=None):
+        self._parsed_data = None
+        self.csv_file = csv_file
+        # other useful things here
+    @property
+    def parsed_data(self):
+        if self._parsed_data is not None:
+            return self._parsed_data
+        self._parsed_data = self.get_data()
+        return self._parsed_data
+    def transform_csv_data(self, data):
+        transformed = {}
+        key = ""
+        for line in data:
+            try:
+                key = '/'.join(line[0:2])
+                transformed[key] = '/'.join(line[2:5])
+            except IndexError as e:
+                print("Missing fields in data '{0}'. Error: '{1}'".format(line, e))
+                break
+        return transformed
+    def import_csv(self):
+        with open(self.csv_file) as f:
+            csvreader = csv.reader(f, delimiter='/')
+            data = list(csvreader)
+        return data
+    def get_data(self):
+        data = self.import_csv()
+        return self.transform_csv_data(data)
+
+parser = Parser('userdata.csv')
+print(parser.parsed_data)

mirror_list.py

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+#!/usr/bin/env python
+class Mirror():
+    def __init__(self, mirror_list=None):
+        self.mirror_list = mirror_list
+        self._list_position = 0
+        self._list_max = len(mirror_list) - 1
+
+    def increment(self):
+        if self._list_position == self._list_max:
+            self._list_position = 0
+        else:
+            self._list_position = self._list_position + 1
+
+    def next(self):
+        self.increment()
+        return self.mirror_list[self._list_position]

requirements.txt

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+flask
+boto3
+python-dotenv