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Flask-Reuploaded

Flask-Reuploaded provides file uploads for Flask.

Notes on this package

This is an independently maintained version of Flask-Uploads based on the 0.2.1 version of the original, but also including four years of unreleased changes, at least not released to PyPI.

Noteworthy is the fix for the Werkzeug API change.

Goals

• provide a stable drop-in replacement for Flask-Uploads
• regain momentum for this widely used package
• provide working PyPI packages

Migration guide from Flask-Uploads

Incompatibilities between Flask-Reuploaded and Flask-Uploads

As already mentioned,
staying compatible with `Flask-Uploads` is one of this project's goals.

Nevertheless, there are the following known incompatibilities:

- the `patch_request_class` helper function has been removed;
  the function was only necessary for Flask 0.6 and earlier.
  Since then you can use Flask's own
  `MAX_CONTENT_LENGTH <https://flask.palletsprojects.com/en/1.1.x/config/#MAX_CONTENT_LENGTH>`_
  environment variable,
  so you don’t read more than this many bytes from the incoming request data.
- `autoserve` of uploaded images now has been deactivated;
  this was a poorly documented "feature",
  which even could have lead to unwanted data disclosure;
  if you want to activate the feature again,
  you need to set `UPLOADS_AUTOSERVE=True`

Uninstall and install

If you have used Flask-Uploads and want to migrate to Flask-Reuploaded, you only have to install Flask-Reuploaded instead of Flask-Uploads.

That's all!

So, if you use pip to install your packages, instead of ...

.. code-block:: bash

$ pip install `Flask-Uploads`  # don't do this! package is broken

... just do ...

.. code-block:: bash

$ pip install `Flask-Reuploaded`

Flask-Reuploaded is a drop-in replacement.

This means you do not have to change a single line of code.

Installation

.. code-block:: bash

$ pip install Flask-Reuploaded

Getting started

create an UploadSet

.. code-block:: python

from flask_uploads import IMAGES

photos = UploadSet("photos", IMAGES)

configure your Flask app and this extension

.. code-block:: python

app.config["UPLOADED_PHOTOS_DEST"] = "static/img"
app.config["SECRET_KEY"] = os.urandom(24)
configure_uploads(app, photos)

use photos in your view function

.. code-block:: python

photos.save(request.files['photo'])

See below for a complete example.

Documentation

You can find the documentation at:

https://flask-reuploaded.readthedocs.io/en/latest/

You can generate the documentation locally:

.. code-block:: bash

tox -e docs

You can update the dependencies for documentation generation:

.. code-block:: bash

tox -e upgradedocs

Minimal example application

Application code, e.g. main.py

.. code-block:: python

    import os

    from flask import Flask, flash, render_template, request
    # please note the import from `flask_uploads` - not `flask_reuploaded`!!
    # this is done on purpose to stay compatible with `Flask-Uploads`
    from flask_uploads import IMAGES, UploadSet, configure_uploads

    app = Flask(__name__)
    photos = UploadSet("photos", IMAGES)
    app.config["UPLOADED_PHOTOS_DEST"] = "static/img"
    app.config["SECRET_KEY"] = os.urandom(24)
    configure_uploads(app, photos)

    @app.route("/", methods=['GET', 'POST'])
    def upload():
        if request.method == 'POST' and 'photo' in request.files:
            photos.save(request.files['photo'])
            flash("Photo saved successfully.")
            return render_template('upload.html')
        return render_template('upload.html')

HTML code for `upload.html`

.. code-block:: html

<!doctype html>
<html lang=en>
<head>
    <meta charset=utf-8>
    <title>Flask-Reuploaded Example</title>
</head>
<body>
    {% with messages = get_flashed_messages() %}
    {% if messages %}
    <ul class=flashes>
    {% for message in messages %}
        <li>{{ message }}</li>
    {% endfor %}
    </ul>
    {% endif %}
    {% endwith %}

<form method=POST enctype=multipart/form-data action="{{ url_for('upload') }}">
    <input type=file name=photo>
    <button type="submit">Submit</button>
</form>
</body>
</html>

Project structure

The project structure would look as following...

.. code-block:: bash

    ❯ tree -I "__*|h*"
    .
    ├── main.py
    ├── static
    │   └── img
    └── templates
        └── upload.html

Running the example application

In order to run the application, you have to enter the following commands...

.. code-block:: bash

❯ export FLASK_APP=main.py

❯ flask run

Then point your browser to http://127.0.0.1:5000/.

Contributing

Contributions are more than welcome.

Please have a look at the open issues <https://github.com/jugmac00/flask-reuploaded/issues>_.

There is also a short contributing guide <https://github.com/jugmac00/flask-reuploaded/blob/master/CONTRIBUTING.rst>_.