flask_example.py

# 
# Generic example
#
from flask import Flask, json, request, Response
import helpers

app = Flask(__name__)

@app.route('/predict', methods = ['POST'])
def api_predict():
    if request.headers['Content-Type'] == 'application/json':
        errors_message = helpers.validate_request_payload(request.json)        
        if len(errors_message) > 0:
            return Response(json.dumps(errors_message),
                            status=422,
                            mimetype='application/json')

        inputs_normalized = helpers.normalize_predictors_values(request.json, norm_params)
        prediction = model.predict(inputs_normalized)
        prediction_response = json.dumps({'y': int(prediction)})
        
        return Response(prediction_response, 
                        status=200, 
                        mimetype='application/json')
    else:
        return "415 Unsupported Media Type"

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

    
#
# Curl requests
#
# curl -X POST -H "Content-Type: application/json" -d '{"audio_path":"data/00009900115260465871771878070.wav"}' localhost:5000/predict
#
# with environment variable
# curl -X POST -H "Content-Type: application/json" -d '{"audio_path":"'"${audiopath}"'"}' localhost:5000/predict