[AB-xxx] refactoring rest-api to not be a maven project and restructuring python tool file structure

python/components/rest-api/docker/Dockerfile

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+FROM python:3.10.13-alpine3.18
+RUN apk --no-cache add msttcorefonts-installer fontconfig && \
+    update-ms-fonts && \
+    fc-cache -f
+ADD wrapper /
+ADD python/requirements.txt requirements.txt
+RUN pip install -r requirements.txt
+ADD resources /python/resources
+ADD python /python
+CMD ["/run.sh"]

python/components/rest-api/python/base/image_gen.py

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+from __main__ import app
+
+from PIL import Image, ImageDraw, ImageFont
+from flask import request
+
+from utils import flask_utils
+
+@app.route('/memes/doge/orangeSun/')
+def image_gen():
+    text = request.args.get('text')
+    with Image.open('resources/img/semf_template.jpg') as im:
+        d1 = ImageDraw.Draw(im)
+        text_box_size = (300, 240)
+        W, H = text_box_size
+        font = ImageFont.truetype(f'Impact.ttf', 60)
+        _, _, w, h = d1.textbbox((0, 0), text, font=font)
+        d1.text(((W-w)/2 + 320, (H-h)/2 + 120), text, font=font, fill=(255, 255, 255))
+        return flask_utils.serve_pil_image(im)

python/components/rest-api/python/main.py

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+import logging
+import os
+
+from flask import Flask
+import importlib
+
+FORMAT = '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
+logging.basicConfig(encoding='utf-8', level=logging.INFO, format=FORMAT)
+template_dir = os.path.abspath('resources/templates')
+app = Flask(__name__, template_folder=template_dir)
+
+import sys
+sys.path.append("..")
+# loads the api end points
+from base import image_gen
+
+# This code was only done, because "from custom import *" did not work, it seems it did not execute the code in it
+# while the code was valid
+# https://stackoverflow.com/questions/57878744/how-do-i-dynamically-import-all-py-files-from-a-given-directory-and-all-sub-di
+def get_py_files(src):
+    cwd = os.getcwd()
+    py_files = []
+    for root, dirs, files in os.walk(src):
+        for file in files:
+            if file.endswith(".py"):
+                py_files.append(os.path.join(cwd, root, file))
+    return py_files
+
+
+def dynamic_import(module_name, py_path):
+    module_spec = importlib.util.spec_from_file_location(module_name, py_path)
+    module = importlib.util.module_from_spec(module_spec)
+    module_spec.loader.exec_module(module)
+    return module
+
+
+def dynamic_import_from_src(src, star_import=False):
+    my_py_files = get_py_files(src)
+    for py_file in my_py_files:
+        module_name = os.path.split(py_file)[-1].strip(".py")
+        imported_module = dynamic_import(module_name, py_file)
+        if star_import:
+            for obj in dir(imported_module):
+                globals()[obj] = imported_module.__dict__[obj]
+        else:
+            globals()[module_name] = imported_module
+    return
+
+
+if __name__ == "__main__":
+    dynamic_import_from_src("custom", star_import=False)
+
+@app.route('/')
+def hello():
+    return 'Hello, World?'
+
+
+if __name__ == "__main__":
+    from waitress import serve
+
+    serve(app, host="0.0.0.0", port=8080)

python/components/rest-api/python/requirements.txt

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+blinker==1.7.0
+certifi==2023.7.22
+charset-normalizer==3.3.2
+click==8.1.7
+Flask==3.0.0
+idna==3.4
+importlib-metadata==6.8.0
+itsdangerous==2.1.2
+Jinja2==3.1.2
+MarkupSafe==2.1.3
+Pillow==10.1.0
+requests==2.31.0
+urllib3==2.0.7
+waitress==2.1.2
+Werkzeug==3.0.1
+zipp==3.17.0
+pytz==2023.3.post1

python/components/rest-api/python/utils/flask_utils.py

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+from io import BytesIO
+
+from flask import send_file
+
+
+def serve_pil_image(pil_img):
+    img_io = BytesIO()
+    pil_img.save(img_io, 'PNG')
+    img_io.seek(0)
+    return send_file(img_io, mimetype='image/png')
+
+
+class ValidationException(Exception):
+    def __init__(self, provided_value, message):
+        self.provided_value = provided_value
+        self.message = message
+        super().__init__(f'{self.message}: provided value: {provided_value}')

python/components/rest-api/wrapper/run.sh

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+#!/bin/sh
+
+echo "Starting python server..."
+cd python
+python3 -u main.py