From 1f3de244a446b3bde7232d265da30971d1992455 Mon Sep 17 00:00:00 2001
From: Andrew Cady <d@jerkface.net>
Date: Wed, 25 Jan 2017 14:31:09 -0500
Subject: dexcom_dumper: submit polled CGM data via HTTP

Each reading is sent as JSON via an HTTP POST request to the host
specified via '--http' and to the paths '/bgevent' and '/ping'.

Currently, this is blocking and it does not retry after errors.
---
 dexcom_reader/dexcom_dumper.py | 41 ++++++++++++++++++++++++++++++++++-------
 1 file changed, 34 insertions(+), 7 deletions(-)

diff --git a/dexcom_reader/dexcom_dumper.py b/dexcom_reader/dexcom_dumper.py
index bba4d17..e279433 100644
--- a/dexcom_reader/dexcom_dumper.py
+++ b/dexcom_reader/dexcom_dumper.py
@@ -2,6 +2,7 @@ import constants
 import readdata
 import sys
 import json
+import requests
 from sys import stdout, stderr
 from datetime import timedelta, datetime
 from time import sleep
@@ -22,6 +23,7 @@ parser.add_option("-n", type="int", dest="num_records", default=DEFAULT_PAGE_COU
 parser.add_option("-v", "--verbose", action="store_true", dest="verbose", help="verbosity (currently for debugging)")
 parser.add_option("-H", "--human", action="store_true", dest="human", help="print human-readable times")
 parser.add_option("-j", "--json", action="store_true", dest="json", help="print JSON output")
+parser.add_option("--http", type="string", dest="host", help="submit via HTTP")
 
 (options, args) = parser.parse_args()
 
@@ -29,6 +31,7 @@ command = options.command or "dump_cgm"
 VERBOSE = options.verbose
 HUMAN = options.human
 JSON = options.json
+HOST = options.host
 
 def get_dexcom_reader():
         if options.g5:
@@ -111,15 +114,36 @@ def sleep_verbose(n):
         print_verbose('sleep(%d)' % n)
         sleep(n)
 
+def POST(path, json_str):
+        try:
+                resp = requests.post(HOST + path, data=json_str,
+                                     headers={'Content-type':
+                                              'application/json'})
+                return True
+        except:
+                return False
+
+def strftime_JSON(t):
+        return t.strftime('%FT%T.0Z');
+
+def send_ping(now):
+        if HOST:
+                POST('/ping', json.dumps(strftime_JSON(now)))
+
 def print_cgm_bg(now, r):
-        if JSON:
-                print json.dumps({
-                        'current_time': now.strftime('%s'),
-                        'event_time': r.system_time.strftime('%s'),
-                        'glucose': r.glucose,
-                        'trend_arrow': r.trend_arrow,
-                        'display_only': r.display_only
+        if HOST or JSON:
+                json_str = json.dumps({
+                        'bgeEventTime': strftime_JSON(r.system_time),
+                        'bgeGlucose': r.glucose,
+                        'bgeTrendArrow': r.trend_arrow.replace('45_', 'DIAGONAL_', 1),
+                        'bgeDisplayOnly': r.display_only
                 })
+                if HOST:
+                        POST('/bgevent', json_str)
+                        send_ping(now)
+                        return
+                if JSON:
+                        print json_str
         else:
                 print '%s: %s %s' % (format_times(now, r.system_time), r.glucose, r.trend_arrow)
         stdout.flush()
@@ -130,6 +154,9 @@ def poll():
                 r = read_recent_egv_data()
                 if r is None:
                         connected(True)
+                        if HOST:
+                                now = dr.ReadSystemTime()
+                                send_ping(now)
                         sleep_verbose(10)
                 elif r is False:
                         connected(False)
-- 
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