/[james]/archive/newsstats/!NewsStats/py/Newsbase.py
ViewVC logotype

Annotation of /archive/newsstats/!NewsStats/py/Newsbase.py

Parent Directory Parent Directory | Revision Log Revision Log


Revision 17 - (hide annotations) (download) (as text)
Tue Feb 11 09:59:30 2003 UTC (21 years, 8 months ago) by james
File MIME type: text/x-python
File size: 6198 byte(s)
Initial import.

1 james 17 """Interface with Newsbase or compatible news database (eg. MsgServe).
2    
3     Ensure that message 0x83581 (NewsBase_Reply) was passed to wimp.task().
4    
5     Functions:
6    
7     Startup() -- look for a Newsbase compatible server
8     ShutDown() -- Inform Newsbase that we've finished
9     ListGroups() -- Get a list of active groups matching the pattern
10     ListArts() -- Get a list of the articles available for a group
11     GetArticle() -- Return the filename of an article
12    
13     Variables:
14    
15     groups -- List of active groups, available after ListGroups()
16    
17     """
18    
19    
20     import os
21     import string
22     import wimp
23    
24    
25     def init():
26     """Look for a Newsbase compatible server.
27    
28     Set Newsbase.active to indicate if Newsbase is running.
29     Report an error if Newsbase returns one.
30    
31     """
32     global active, handle
33     active = 0
34     # NewsBase_Command NewsBase_Startup
35     wimp.send_message(18, 0x83580, 0, (0, 60, 0))
36     event, details = wimp.poll(0x3973)
37     if event == 18 and details == 0x83580:
38     # got our own broadcast
39     event, details = wimp.poll(0x3973)
40     if event in (17, 18) and details == 0x83581:
41     if wimp.b[5] == 0:
42     handle = wimp.b[1]
43     active = 1
44     elif wimp.b[5] % 10 != 0:
45     wimp.warning(wimp.b.nullstring(32, wimp.b[0]))
46    
47    
48     def quit():
49     """Inform Newsbase that we've finished."""
50     global active
51     if active:
52     wimp.send_message(17, 0x83580, handle, (10,))
53     active = 0
54    
55    
56     def Reply():
57     global active
58     if wimp.b[5] == 0:
59     init()
60     elif wimp.b[5] == 10:
61     active = 0
62    
63    
64     def SetUser(username, password):
65     """Set the Newsbase user.
66    
67     Return None if OK, a string giving error otherwise.
68    
69     """
70     wimp.send_message(17, 0x83580, handle, (20, 0, 0, username + '\0' + password))
71     event, details = wimp.poll(0x3973)
72     while not (event == 17 and details == 0x83581):
73     event, details = wimp.poll(0x3973)
74     if wimp.b[5] == 20:
75     return None
76     elif wimp.b[5] % 10 != 0:
77     return wimp.b.nullstring(32, wimp.b[0])
78     return 'Unexpected response from Newsbase'
79    
80    
81     def ListGroups(username):
82     """Get a list of active groups for the given user.
83    
84     Returns a list of strings giving the group names,
85     or a string if Newsbase returned it as an error.
86    
87     """
88     global groups, group_ranges
89     groups = []
90     # NewsBase_Command NewsBase_GetUserInfo (home directory)
91     wimp.send_message(17, 0x83580, handle, (440, 5, 0, username))
92     event, details = wimp.poll(0x3973)
93     while not (event in (17, 18) and details == 0x83581):
94     event, details = wimp.poll(0x3973)
95     if wimp.b[5] == 440:
96     home = wimp.b.nullstring(32 + len(username) + 1, wimp.b[0])
97     newsrc = None
98     if os.path.isfile(os.path.join(home, 'NewsRC')):
99     newsrc = os.path.join(home, 'NewsRC')
100     else:
101     for dir in os.listdir(home):
102     if os.path.isdir(os.path.join(home, dir)):
103     if os.path.isfile(os.path.join(home, dir, 'NewsRC')):
104     newsrc = os.path.join(home, dir, 'NewsRC')
105     break
106     if newsrc is None:
107     return 'Unable to locate NewsRC'
108     file = open(newsrc, 'r')
109     groups = file.readlines()
110     file.close()
111     groups = map(lambda z: z[:-1].split(':')[0], groups)
112     if groups[-1] == 'end':
113     groups = groups[:-1]
114     groups.sort()
115     return groups
116     elif wimp.b[5] % 10 != 0:
117     return wimp.b.nullstring(32, wimp.b[0])
118     return 'Unexpected response from Newsbase'
119    
120    
121     def ListArts(group):
122     """Get a list of the articles available for a group.
123    
124     Returns a list of tuples of the form
125     (article number, size, From:, Subject:, Message-ID:, Date:),
126     or a string if Newsbase returned it as an error.
127    
128     Calls wimp.poll and may call wimp.handle.
129    
130     """
131     articles = []
132    
133     wimp.send_message(17, 0x83580, handle, (100, 0, 0, group))
134     event, details = wimp.poll(0x3973)
135     while not (event == 17 and details == 0x83581):
136     event, details = wimp.poll(0x3973)
137     if wimp.b[5] == 100:
138     pass
139     elif wimp.b[5] % 10 != 0:
140     return wimp.b.nullstring(32, wimp.b[0])
141     else:
142     return 'Unexpected response from Newsbase'
143    
144     event, details = wimp.poll(0x3973)
145     while not (event == 17 and details == 0x83581):
146     event, details = wimp.poll(0x3973)
147     if wimp.b[5] == 100:
148     pass
149     elif wimp.b[5] % 10 != 0:
150     return wimp.b.nullstring(32, wimp.b[0])
151     else:
152     return 'Unexpected response from Newsbase'
153    
154     wimp.send_message(17, 0x83580, handle, (200, 0, 0, group))
155     while 1:
156     event, details = wimp.poll(1)
157     while not (event == 17 and details == 0x83581):
158     wimp.handle((event, details))
159     event, details = wimp.poll(1)
160     if wimp.b[5] == 200:
161     if wimp.b[6] == 0:
162     return articles
163     else:
164     article_no = wimp.b[6]
165     article_size = wimp.b[7]
166     data = wimp.b.tostring(32, wimp.b[0])
167     article_from, article_subject, article_id, article_date = string.split(data, chr(0))[:4]
168     articles.append((article_no, article_size, article_from, article_subject,
169     article_id, article_date))
170     # if (len(article_numbers) & 7) == 0:
171     # window_status.icon_text(2, str(len(article_numbers)))
172     elif wimp.b[5] % 10 != 0:
173     return wimp.b.nullstring(32, wimp.b[0])
174     else:
175     return 'Unexpected response from Newsbase'
176    
177    
178     def GetArticle(group, article):
179     """Return the filename of an article.
180    
181     If successful, returns (1, filename). Otherwise returns
182     (0, error message).
183    
184     Calls wimp.poll and may call wimp.handle.
185    
186     """
187     wimp.send_message(17, 0x83580, handle, (220, article, 0, group))
188     event, details = wimp.poll(0x141)
189     while not (event in (17, 18) and details == 0x83581):
190     wimp.handle((event, details))
191     event, details = wimp.poll(0x141)
192     if wimp.b[5] == 220:
193     return 1, wimp.b.nullstring(32, wimp.b[0])
194     else:
195     return 0, wimp.b.nullstring(32, wimp.b[0])

  ViewVC Help
Powered by ViewVC 1.1.26