Microservice for downloading files asynchronously

Microservice helps the work of the main site made on CMS and serves requests to download archives with files. Microservice can do nothing but pack files to the archive. Files are uploaded to the server via FTP or CMS admin panel.

The creation of the archive occurs on the fly at the request of the user. The archive is not stored on disk; instead, as it is packaged, it is immediately sent to the user for download.

The archive is protected from unauthorized access by a hash in the download link address, for example: http://host.ru/archive/3bea29ccabbbf64bdebcc055319c5745/. The hash is given by the name of the directory with files, the directory structure looks like this:

- photos
    - 3bea29ccabbbf64bdebcc055319c5745
      - 1.jpg
      - 2.jpg
      - 3.jpg
    - af1ad8c76fda2e48ea9aed2937e972ea
      - 1.jpg
      - 2.jpg

Setup

The microservice requires a Python version at least 3.6.

pip install -r requirements.txt && apt install zip

Create .env file and set the following environmental variables:

Environmental	Description
ENABLE_RESPONSE_DELAY	add delay for response when download zip file
ENABLE_LOGGING	add logging to microservice
RESPONSE_DELAY	amount of delay for response
PHOTOS_DIR	directory, where server keeps photos

Create .docker_env file for docker compose and set the following environmental variables:

Environmental	Description
PORT	4 digits port number for microservice

Running

python server.py

Running with flags hostname, port

python server.py -H 127.0.0.1 -P 7777

Running with a docker compose with the following command:

 docker compose --env-file .docker_env up -d

The server will start on port 7777 to check it go to the page in the browser http://127.0.0.1:7777/.

After that, redirect requests to the microservice, starts with /archive/. For example:

GET http://host.ru/archive/3bea29ccabbbf64bdebcc055319c5745/
GET http://host.ru/archive/af1ad8c76fda2e48ea9aed2937e972ea/