THETA-Web-API + Python3にてTHETAへアクセスし写真を撮りたい

前提・実現したいこと

Qiitaに乗っていたコードを参考に動かしてみたい。
写真が指定パスに画像が出力されれば正常動作しているといえるでしょう。

単体で動作するように関数化は崩しました。

発生している問題・エラーメッセージ

しかし、エラーが発生しました。

Traceback (most recent call last):
  File "/home/<username>/dev/huga (コピー).py", line 24, in <module>
    urllib.request.urlopen('http://192.168.1.1/osc/commands/execute', data)
  File "/usr/lib/python3.5/urllib/request.py", line 163, in urlopen
    return opener.open(url, data, timeout)
  File "/usr/lib/python3.5/urllib/request.py", line 472, in open
    response = meth(req, response)
  File "/usr/lib/python3.5/urllib/request.py", line 582, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib/python3.5/urllib/request.py", line 510, in error
    return self._call_chain(*args)
  File "/usr/lib/python3.5/urllib/request.py", line 444, in _call_chain
    result = func(*args)
  File "/usr/lib/python3.5/urllib/request.py", line 590, in http_error_default
    raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 403: Forbidden

該当のソースコード

Python
1#!/usr/bin/env python3
2import json
3import os
4import time
5import urllib.request
6
7
8save_dir = "~/"
9
10urllib.request.urlopen("http://192.168.1.1/osc/info").read()
11
12# create session
13print('Create Session')
14data = json.dumps({"name":"camera.startSession"}).encode('ascii')
15res = urllib.request.urlopen('http://192.168.1.1/osc/commands/execute', data)
16sessionId = json.loads(res.read().decode('utf-8'))["results"]["sessionId"]
17
18# record fingerprint before taking photo
19res = urllib.request.urlopen('http://192.168.1.1/osc/state', urllib.parse.urlencode({}).encode('ascii'))
20prev_fingerprint = fingerprint = json.loads(res.read().decode('utf-8'))["fingerprint"]
21
22# take a picture
23data = json.dumps({"name":"camera.takePicture", "parameters": {"sessionId": sessionId}}).encode('ascii')
24urllib.request.urlopen('http://192.168.1.1/osc/commands/execute', data)
25print('Took a photo')
26
27# get photo url
28fileUri = ""
29while True:
30    res = urllib.request.urlopen('http://192.168.1.1/osc/state', urllib.parse.urlencode({}).encode('ascii'))
31    j = json.loads(res.read().decode('utf-8'))
32    fingerprint = j["fingerprint"]
33    fileUri = j["state"]["_latestFileUri"]
34    file_name = os.path.basename(fileUri)
35    if not fileUri or fingerprint == prev_fingerprint:
36        time.sleep(0.2)  # avoid a load by frequent requesting on theta.
37    else:
38        print('new_photo_file:', file_name)
39        break
40
41# save photo
42print('Saving a photo')
43content = None
44while content is None:
45    try:
46        data = json.dumps({"name":"camera.getImage", "parameters": {"fileUri": fileUri}}).encode('ascii')
47        res = urllib.request.urlopen('http://192.168.1.1/osc/commands/execute', data)
48        content = res.read()
49        with open(os.path.join(save_dir, file_name), "wb") as file:
50                file.write(content)
51    except urllib.error.HTTPError as err:
52        if err.code != 400:
53            print("taken photo may not be saved to the theta storage yet.")
54            raise err
55        else:
56            time.sleep(0.2)
57
58print('Saved a photo')
59
60# close session
61data = json.dumps({"name":"camera.closeSession", "parameters": {"sessionId": sessionId}}).encode('ascii')
62urllib.request.urlopen('http://192.168.1.1/osc/commands/execute', data)
63print('Closed session')
64