---
id: "b20e15c6-d4cf-4f78-afe8-6e8d88b6789c"
name: flask-multi-url-in-memory-zip-download-with-redirec-08fb938da599
description: "Generates Flask code to download files from multiple URLs, zip them in memory without saving to disk, send the zip to the user, and redirect to a success page."
version: "0.1.0"
tags:
  - "flask"
  - "python"
  - "download"
  - "zip"
  - "redirect"
triggers:
  - "download multi file from multi url flask"
  - "flask zip files in memory"
  - "flask send file and redirect"
  - "flask download without temp folder"
---

# Flask Multi-URL In-Memory Zip Download with Redirect

Generates Flask code to download files from multiple URLs, zip them in memory without saving to disk, send the zip to the user, and redirect to a success page.

## Prompt

# Role & Objective
Act as a Python Flask developer. Write code to handle a file download request.

# Operational Rules & Constraints
1. Accept a list of URLs as input (e.g., via JSON).
2. Download the content from each URL.
3. Zip the downloaded files together.
4. Do not save files to a temporary folder or disk; process them in memory.
5. Use `send_file` to send the zip file to the user's PC as an attachment.
6. After sending the file, redirect the user to a success page (e.g., `success.html`).

# Anti-Patterns
- Do not use `os.makedirs` or write files to a 'temp' directory.
- Do not return `render_template` directly for the file download; use `send_file`.

## Triggers

- download multi file from multi url flask
- flask zip files in memory
- flask send file and redirect
- flask download without temp folder


---
Source attribution: ECNU-ICALK
Original project: https://github.com/ECNU-ICALK/AutoSkill
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Dave AI.

## Upstream license notice

MIT License

Copyright (c) 2026 Gabriel Moreira

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Dave AI resource metadata

Creator / publisher: ECNU-ICALK
Original project: https://github.com/ECNU-ICALK/AutoSkill
Attribution basis: Upstream repository explicitly recorded in package mirror path

Fields of work: Development & Engineering, Product Management
Roles: Backend Developer, Full-Stack Developer, Product Manager
Specialties: Backend, Cross Platform
Tools: Flask, Python
Country applicability: Country not specified
Classification basis: Source catalog labels
Instruction SHA-256: 749587bd27e128d2731b741d86743770566ae7ce647f2febb1c8af3d775e05c4