add more needed python3 modules to README

[chrisu/seepark.git] / web / seepark_web.py

diff --git a/web/seepark_web.py b/web/seepark_web.py
index b9a3bb14418312830af2c2ca6d187f1e1c3d668d..596d4823410fbec7c435850ae7599f4d5da29dab 100644 (file)
--- a/web/seepark_web.py
+++ b/web/seepark_web.py
@@ -1,11 +1,26 @@
-from flask import Flask, render_template, jsonify
 from random import uniform
+import datetime
 import time
 import configparser
 import os
+from flask import Flask, render_template, jsonify, request
+import flask.json
 from sqlalchemy import create_engine
-app = Flask(__name__)
 
+
+class JSONEncoder(flask.json.JSONEncoder):
+    def default(self, object):
+        if isinstance(object, datetime.datetime):
+            return object.isoformat()
+        return super().default(object)
+
+
+def parse_datetime(date_str):
+    return datetime.datetime.strptime(date_str, '%Y-%m-%dT%H:%M:%S')
+
+
+app = Flask(__name__)
+app.json_encoder = JSONEncoder
 config = configparser.ConfigParser()
 config.read(os.environ['SEEPARKINI'])
 apikey = config.get('openweathermap', 'apikey')
@@ -20,7 +35,7 @@ def open_engine(config):
     return engine
 
 
-@app.route('/api/<version>/sensors')
+@app.route('/api/<version>/sensors/')
 def sensors(version):
     """List all sensors found in the database"""
     engine = open_engine(config)
@@ -30,6 +45,30 @@ def sensors(version):
         return jsonify(result)
 
 
+@app.route('/api/<version>/sensor/<sensor_id>')
+def sensor(version, sensor_id):
+    """Return all sensor data
+
+    URL parameters:
+    begin=<datetime>, optional, format like "2018-05-19T21:07:53"
+    end=<datetime>, optional, format like "2018-05-19T21:07:53"
+    """
+    engine = open_engine(config)
+    with engine.connect() as conn:
+        where = ['sensor_id=%s']
+        sql_args = [sensor_id]
+        if 'begin' in request.args:
+            where.append('timestamp>=%s')
+            sql_args.append(request.args.get('begin', None, parse_datetime))
+        if 'end' in request.args:
+            where.append('timestamp<=%s')
+            sql_args.append(request.args.get('end', None, parse_datetime))
+        sql = 'select * from sensors where {} order by id'.format(' and '.join(where))
+        cursor = conn.execute(sql, *sql_args)
+        result = [dict(row) for row in cursor]
+        return jsonify(result)
+
+
 @app.route('/data/', defaults={'timespan': 1})
 @app.route("/data/<int:timespan>", methods=['GET'])
 def data(timespan):