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a29d3526 MM |
1 | #!/usr/bin/env python |
2 | ||
8993810c MM |
3 | import re |
4 | import requests | |
7a31b4aa | 5 | import json |
ff3d2ab4 | 6 | import warnings |
8993810c | 7 | |
a29d3526 | 8 | |
178faa46 MM |
9 | """This module abstracts connection to pod. |
10 | """ | |
11 | ||
12 | ||
385e7ebe MM |
13 | class LoginError(Exception): |
14 | pass | |
15 | ||
16 | ||
b0b4c46d MM |
17 | class TokenError(Exception): |
18 | pass | |
19 | ||
20 | ||
a29d3526 MM |
21 | class Connection(): |
22 | """Object representing connection with the server. | |
23 | It is pushed around internally and is considered private. | |
24 | """ | |
27a28aaf MM |
25 | _token_regex = re.compile(r'content="(.*?)"\s+name="csrf-token') |
26 | _userinfo_regex = re.compile(r'window.current_user_attributes = ({.*})') | |
27 | login_data = {} | |
b0b4c46d | 28 | token = '' |
27a28aaf | 29 | |
a29d3526 | 30 | def __init__(self, pod, username='', password=''): |
8993810c MM |
31 | """ |
32 | :param pod: The complete url of the diaspora pod to use. | |
33 | :type pod: str | |
34 | :param username: The username used to log in. | |
35 | :type username: str | |
36 | :param password: The password used to log in. | |
37 | :type password: str | |
38 | """ | |
a29d3526 | 39 | self.pod = pod |
8993810c | 40 | self.session = requests.Session() |
8993810c MM |
41 | self._setlogin(username, password) |
42 | ||
33b34938 | 43 | def get(self, string, headers={}, params={}): |
8993810c MM |
44 | """This method gets data from session. |
45 | Performs additional checks if needed. | |
46 | ||
47 | Example: | |
7a31b4aa | 48 | To obtain 'foo' from pod one should call `get('foo')`. |
8993810c MM |
49 | |
50 | :param string: URL to get without the pod's URL and slash eg. 'stream'. | |
51 | :type string: str | |
52 | """ | |
33b34938 | 53 | return self.session.get('{0}/{1}'.format(self.pod, string), params=params, headers=headers) |
8993810c MM |
54 | |
55 | def post(self, string, data, headers={}, params={}): | |
56 | """This method posts data to session. | |
57 | Performs additional checks if needed. | |
58 | ||
59 | Example: | |
7a31b4aa | 60 | To post to 'foo' one should call `post('foo', data={})`. |
8993810c MM |
61 | |
62 | :param string: URL to post without the pod's URL and slash eg. 'status_messages'. | |
63 | :type string: str | |
64 | :param data: Data to post. | |
65 | :param headers: Headers (optional). | |
66 | :type headers: dict | |
67 | :param params: Parameters (optional). | |
68 | :type params: dict | |
69 | """ | |
70 | string = '{0}/{1}'.format(self.pod, string) | |
75fcdd7d | 71 | request = self.session.post(string, data, headers=headers, params=params) |
8993810c MM |
72 | return request |
73 | ||
178faa46 MM |
74 | def put(self, string, data=None, headers={}, params={}): |
75 | """This method PUTs to session. | |
76 | """ | |
77 | string = '{0}/{1}'.format(self.pod, string) | |
78 | if data is not None: request = self.session.put(string, data, headers=headers, params=params) | |
79 | else: request = self.session.put(string, headers=headers, params=params) | |
80 | return request | |
81 | ||
8993810c MM |
82 | def delete(self, string, data, headers={}): |
83 | """This method lets you send delete request to session. | |
84 | Performs additional checks if needed. | |
85 | ||
86 | :param string: URL to use. | |
87 | :type string: str | |
88 | :param data: Data to use. | |
89 | :param headers: Headers to use (optional). | |
90 | :type headers: dict | |
91 | """ | |
92 | string = '{0}/{1}'.format(self.pod, string) | |
75fcdd7d | 93 | request = self.session.delete(string, data=data, headers=headers) |
8993810c MM |
94 | return request |
95 | ||
96 | def _setlogin(self, username, password): | |
97 | """This function is used to set data for login. | |
b0b4c46d | 98 | |
8993810c MM |
99 | .. note:: |
100 | It should be called before _login() function. | |
101 | """ | |
a29d3526 | 102 | self.username, self.password = username, password |
8993810c MM |
103 | self.login_data = {'user[username]': self.username, |
104 | 'user[password]': self.password, | |
b0b4c46d | 105 | 'authenticity_token': self._fetchtoken()} |
8993810c | 106 | |
385e7ebe MM |
107 | def _login(self): |
108 | """Handles actual login request. | |
109 | Raises LoginError if login failed. | |
110 | """ | |
111 | request = self.post('users/sign_in', | |
112 | data=self.login_data, | |
113 | headers={'accept': 'application/json'}) | |
114 | if request.status_code != 201: | |
b0b4c46d | 115 | raise LoginError('{0}: login failed'.format(request.status_code)) |
385e7ebe MM |
116 | |
117 | def login(self, username='', password=''): | |
118 | """This function is used to log in to a pod. | |
119 | Will raise LoginError if password or username was not specified. | |
8993810c | 120 | """ |
385e7ebe MM |
121 | if username and password: self._setlogin(username, password) |
122 | if not self.username or not self.password: raise LoginError('password or username not specified') | |
123 | self._login() | |
124 | ||
63cc182d MM |
125 | def logout(self): |
126 | """Logs out from a pod. | |
127 | When logged out you can't do anything. | |
128 | """ | |
129 | self.get('users/sign_out') | |
b0b4c46d MM |
130 | self.username = '' |
131 | self.token = '' | |
132 | self.password = '' | |
63cc182d | 133 | |
385e7ebe | 134 | def podswitch(self, pod): |
7a31b4aa | 135 | """Switches pod from current to another one. |
385e7ebe MM |
136 | """ |
137 | self.pod = pod | |
138 | self._login() | |
8993810c | 139 | |
7a31b4aa MM |
140 | def getUserInfo(self): |
141 | """This function returns the current user's attributes. | |
142 | ||
143 | :returns: dict -- json formatted user info. | |
144 | """ | |
145 | request = self.get('bookmarklet') | |
146 | userdata = json.loads(self._userinfo_regex.search(request.text).group(1)) | |
147 | return userdata | |
148 | ||
b0b4c46d MM |
149 | def _fetchtoken(self): |
150 | """This method tries to get token string needed for authentication on D*. | |
151 | ||
152 | :returns: token string | |
153 | """ | |
154 | request = self.get('stream') | |
155 | token = self._token_regex.search(request.text).group(1) | |
156 | return token | |
2ec93347 | 157 | |
ff3d2ab4 | 158 | def get_token(self, new=False): |
385e7ebe | 159 | """This function returns a token needed for authentication in most cases. |
b0b4c46d MM |
160 | Each time it is run a _fetchtoken() is called and refreshed token is stored. |
161 | ||
162 | It is more safe to use than _fetchtoken(). | |
ff3d2ab4 MM |
163 | By setting new you can request new token or decide to get stored one. |
164 | If no token is stored new one will be fatched anyway. | |
a29d3526 | 165 | |
8993810c MM |
166 | :returns: string -- token used to authenticate |
167 | """ | |
b0b4c46d | 168 | try: |
ff3d2ab4 MM |
169 | if new: self.token = self._fetchtoken() |
170 | if not self.token: self.token = self._fetchtoken() | |
b0b4c46d | 171 | except requests.exceptions.ConnectionError as e: |
ff3d2ab4 | 172 | warnings.warn('{0} was cought: reusing old token'.format(e)) |
b0b4c46d | 173 | finally: |
ff3d2ab4 MM |
174 | if not self.token: raise TokenError('cannot obtain token and no previous token found for reuse') |
175 | return self.token |