Re-implement KML output, create altitude database field in setup

main.py

@@ -63,7 +63,6 @@ def buildGJSON(data):
 }"""
 
  headers = [["Content-Type", "application/vnd.geo+json"], ['Content-Disposition', 'attachment; filename="export.geojson"']]
-
  return headers, output
 
 def buildGPX(data):
@@ -97,6 +96,38 @@ def buildGPX(data):
  headers = [["Content-Type", "application/gpx+xml"], ['Content-Disposition', 'attachment; filename="export.gpx"']]
  return headers, output
 
+def buildKML(data):
+ output = """<?xml version="1.0" encoding="UTF-8"?>
+<kml xmlns="http://www.opengis.net/kml/2.2">
+<Document>
+<Placemark>
+<ExtendedData>
+<Data name="styleUrl"><value>#style</value></Data>
+<Data name="styleHash"><value>1a1ac94e</value></Data>
+<Data name="stroke"><value>#ffff00</value></Data>
+<Data name="stroke-opacity"><value>0.4980392156862745</value></Data>
+<Data name="stroke-width"><value>4</value></Data>
+<Data name="fill"><value>#00ff00</value></Data>
+<Data name="fill-opacity"><value>0.4980392156862745</value></Data>
+</ExtendedData>
+<LineString>
+<coordinates>
+"""
+
+ for row in data:
+  output += "%s,%s,%s " % (row["lon"], row["lat"], row["alt"] or "0")
+
+ output += """
+</coordinates>
+</LineString>
+</Placemark>
+</Document>
+</kml>
+"""
+
+ headers = [["Content-Type", "application/vnd.google-earth.kml+xml"], ['Content-Disposition', 'attachment; filename="export.kml"']]
+ return headers, output
+
 def application(env, re):
  if env["REQUEST_METHOD"] == "POST":
   args = cgi.parse_qs(env['wsgi.input'].readline().decode(), True)
@@ -206,18 +237,17 @@ def application(env, re):
   frm = on if on else args["from"][0] if "from" in args else None
   to = on if on else args["to"][0] if "to" in args else None
 
-  if "format" in args:
+  if not "format" in args or args["format"][0] in ("json", "gjson", "geojson", "gj") or not args["format"]:
-   if args["format"][0] in ("json", "gjson", "geojson", "gj") or not args["format"]:
-    builder = buildGJSON
-   elif args["format"][0] == "gpx":
-    builder = buildGPX
-   else:
-    re("400 Bad Request", [])
-    yield "<h1>400 Bad Request</h1>".encode()
-    yield "Unknown format: %s" % args["format"]
-    return
-  else:
    builder = buildGJSON
+  elif args["format"][0] == "gpx":
+   builder = buildGPX
+  elif args["format"][0] == "kml":
+   builder = buildKML
+  else:
+   re("400 Bad Request", [])
+   yield "<h1>400 Bad Request</h1>".encode()
+   yield "Unknown format: %s" % args["format"]
+   return
 
   frm = frm or "2000-01-01"
   to = to or datetime.datetime.now().strftime('%Y-%m-%d')
@@ -233,7 +263,7 @@ def application(env, re):
 
   conn, cur = getDatabase()
 
-  sql = "SELECT ts, lat, lon FROM tracker WHERE device=%s AND DATE(ts)>=%s and DATE(ts)<=%s ORDER BY ts ASC;";
+  sql = "SELECT * FROM tracker WHERE device=%s AND DATE(ts)>=%s and DATE(ts)<=%s ORDER BY ts ASC;";
   cur.execute(sql, (device, frm, to))
 
   data = cur.fetchall()

setup.py

@@ -25,7 +25,7 @@ config.set('Database', 'user', user)
 config.set('Database', 'pass', pwd)
 config.set('Database', 'name', name)
 
-sql1 = "CREATE TABLE IF NOT EXISTS tracker ( ts TIMESTAMP DEFAULT CURRENT_TIMESTAMP, device VARCHAR(38), lat DOUBLE, lon DOUBLE, PRIMARY KEY(ts, device) );";
+sql1 = "CREATE TABLE IF NOT EXISTS tracker ( ts TIMESTAMP DEFAULT CURRENT_TIMESTAMP, device VARCHAR(38), lat DOUBLE, lon DOUBLE, alt DOUBLE, PRIMARY KEY(ts, device) );";
 sql2 = "CREATE TABLE IF NOT EXISTS users ( user VARCHAR(64) PRIMARY KEY, password VARCHAR(128), admin BOOLEAN );";
 sql3 = "CREATE TABLE IF NOT EXISTS device ( device VARCHAR(38) PRIMARY KEY, passkey VARCHAR(128) );";