Ver la versión de Flask¶
In [1]:
import flask
flask.__version__
Out[1]:
In [ ]:
from flask import Flask
app = Flask(__name__)
@app.route("/")
def hello():
return "Hello World!"
if __name__ == "__main__":
app.run(debug=True, port=5000)
Corremos con:
python main.py
Y listo ya tenemos corriendo nuestra web.
Subir un archivo en Flask¶
Crear un archivo main.py y en el mismo lugar crear la carpeta de nombre "archivos"
En el archivo main.py :
In [ ]:
import os
from flask import Flask, flash, request, redirect, url_for, send_from_directory
from werkzeug.utils import secure_filename
# en el mismo lugar del archivo main.py crear la carpeta "archivos"
UPLOAD_FOLDER = 'archivos' # /ruta/a/la/carpeta
ALLOWED_EXTENSIONS = set(['txt', 'pdf', 'png', 'jpg', 'jpeg', 'gif'])
app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
def allowed_file(filename):
return '.' in filename and \
filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS
@app.route('/', methods=['GET', 'POST'])
def upload_file():
if request.method == 'POST':
if 'file' not in request.files:
flash('No file part')
return redirect(request.url)
file = request.files['file']
if file.filename == '':
flash('No selected file')
return redirect(request.url)
if file and allowed_file(file.filename):
filename = secure_filename(file.filename)
file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
return redirect(url_for('uploaded_file',filename=filename))
return '''
<!doctype html>
<title>Subir archivo</title>
<h1>Subir archivo</h1>
<form method="post" enctype="multipart/form-data">
<input type="file" name="file">
<input type="submit" value="Upload">
</form>
'''
@app.route('/uploads/<filename>')
def uploaded_file(filename):
return send_from_directory(app.config['UPLOAD_FOLDER'],filename)
if __name__ == "__main__":
app.run(debug=True, port=5000)
In [ ]:
@app.route('/uploads/<filename>')
def uploaded_file(filename):
return send_from_directory(app.config['UPLOAD_FOLDER'],filename,
as_attachment=True,attachment_filename='out.png')
Completo:
In [ ]:
import os
from flask import Flask, flash, request, redirect, url_for, send_from_directory
from werkzeug.utils import secure_filename
# en el mismo lugar del archivo main.py crear la carpeta "archivos"
UPLOAD_FOLDER = 'archivos' # /ruta/a/la/carpeta
ALLOWED_EXTENSIONS = set(['txt', 'pdf', 'png', 'jpg', 'jpeg', 'gif'])
app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
def allowed_file(filename):
return '.' in filename and \
filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS
@app.route('/', methods=['GET', 'POST'])
def upload_file():
if request.method == 'POST':
if 'file' not in request.files:
flash('No file part')
return redirect(request.url)
file = request.files['file']
if file.filename == '':
flash('No selected file')
return redirect(request.url)
if file and allowed_file(file.filename):
filename = secure_filename(file.filename)
file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
return redirect(url_for('uploaded_file',filename=filename))
return '''
<!doctype html>
<title>Subir archivo</title>
<h1>Subir archivo</h1>
<form method="post" enctype="multipart/form-data">
<input type="file" name="file">
<input type="submit" value="Upload">
</form>
'''
@app.route('/uploads/<filename>')
def uploaded_file(filename):
return send_from_directory(app.config['UPLOAD_FOLDER'],filename,
as_attachment=True,attachment_filename='out.png')
if __name__ == "__main__":
app.run(debug=True, port=5000)
