/
loofu.py
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loofu.py
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from bson import json_util, objectid
from flask import Flask, g, render_template, request, Response, send_from_directory
import json
import os
from pymongo.mongo_client import MongoClient
app = Flask(__name__)
app.config.from_pyfile('loofu.cfg')
conf = app.config
@app.route('/')
def index():
return app.send_static_file("index.html")
@app.route('/<path:resource>')
def serve_static_resource(resource):
return send_from_directory('static/', resource)
def get_db():
if not hasattr(g, 'mongodb_client'):
g.mongodb_client = get_MongoDB()
return g.mongodb_client
# This does not work with Python 3
#@app.teardown_appcontext
#def close_db(error):
# """Closes the database again at the end of the request."""
# if hasattr(g, 'mongodb_client'):
# g.mongodb_client.close()
def get_MongoDB():
client = MongoClient(conf['DB_HOST'], conf['DB_PORT'])
if conf['DB_USER']:
client[conf['DB_NAME']].authenticate(conf['DB_USER'], conf['DB_PASS'], source='admin')
db = client[conf['DB_NAME']]
return db
@app.route("/toilets/within")
def within():
db = get_db()
# Get boundary coords - production code would check for invalid values
lat1 = float(request.args.get('lat1'))
lon1 = float(request.args.get('lon1'))
lat2 = float(request.args.get('lat2'))
lon2 = float(request.args.get('lon2'))
# Make GeoJSON box
geometry = { "type" : "Polygon", "coordinates" : [[[lon1, lat1], [lon2, lat1], [lon2, lat2], [lon1, lat2], [lon1, lat1]]]}
# Limit results for large datasets
result = db.toilets.find({"geometry.coordinates" : { "$geoWithin" : { "$geometry" : geometry} } }).limit(conf['RESULT_LIMIT'])
return Response(response=str(json.dumps({'results':list(result)},default=json_util.default)), status=200, mimetype="application/json" )
@app.route("/toilets/near")
def near():
db = get_db()
# Get request parameters - production code would check for invalid values
lat = float(request.args.get('lat'))
lon = float(request.args.get('lon'))
# Limit results in case dataset is large
result = db.toilets.find({"geometry.coordinates" : { "$near" : {"$geometry" : { "type" : "Point" , "coordinates": [ lon , lat ] }}}}).limit(conf['RESULT_LIMIT'])
# Convert results into valid JSON
return Response(response=str(json.dumps({'results':list(result)},default=json_util.default)), status=200, mimetype="application/json" )
@app.route("/toilets")
def all_toilets():
db = get_db()
result = db.toilets.find().limit(conf['RESULT_LIMIT'])
return Response(response=str(json.dumps({'results':list(result)},default=json_util.default)), status=200, mimetype="application/json" )
if __name__ == "__main__":
app.run()