Flask: Download a csv file on clicking a button [duplicate]

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梦如初夏

2020-12-04 10:28

Firstly you need to import from flask make_response, that will generate your response and create variable, something like response. Secondly, make response.content_type = "text/csv" Thirdly - return your response.

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日久生厌

2020-12-04 10:32

You can use flask.send_file() to send a static file:

from flask import send_file

@app.route('/getPlotCSV') # this is a job for GET, not POST
def plot_csv():
    return send_file('outputs/Adjacency.csv',
                     mimetype='text/csv',
                     attachment_filename='Adjacency.csv',
                     as_attachment=True)

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臣服心动

2020-12-04 10:33

Here is one way to download a CSV file with no Javascript:

#!/usr/bin/python

from flask import Flask, Response
app = Flask(__name__)

@app.route("/")
def hello():
    return '''
        <html><body>
        Hello. <a href="/getPlotCSV">Click me.</a>
        </body></html>
        '''

@app.route("/getPlotCSV")
def getPlotCSV():
    # with open("outputs/Adjacency.csv") as fp:
    #     csv = fp.read()
    csv = '1,2,3\n4,5,6\n'
    return Response(
        csv,
        mimetype="text/csv",
        headers={"Content-disposition":
                 "attachment; filename=myplot.csv"})


app.run(debug=True)

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