Call QGIS Server via Flask

standalone-flask-qgis-server.py

from flask import Flask, request, Response
app = Flask(__name__)
from qgis.core import QgsApplication
from qgis.server import *

QgsApplication.setPrefixPath("/usr", True)
qgisapp = QgsApplication([], False)
qgisapp.initQgis()
qgisserver = QgsServer()

@app.route('/qgis-server')
def qgisServer():
    qgisrequest = QgsBufferServerRequest(request.url)
    qgisresponse = QgsBufferServerResponse()
    qgisserver.handleRequest(qgisrequest, qgisresponse)
    response = Response(qgisresponse.body().data(), status=str(qgisresponse.statusCode()), headers=qgisresponse.headers()) #
    return(response)


if __name__ == '__main__':
    app.debug = True
    app.run()