Show More
@@ -1,95 +1,95 b'' | |||||
1 | import sys |
|
1 | import sys | |
2 | import time |
|
2 | import time | |
3 | from io import StringIO |
|
3 | from io import StringIO | |
4 |
|
4 | |||
5 | from session import extract_header, Message |
|
5 | from session import extract_header, Message | |
6 |
|
6 | |||
7 |
from IPython.utils import io, text |
|
7 | from IPython.utils import io, text | |
8 | from IPython.utils import py3compat |
|
8 | from IPython.utils import py3compat | |
9 |
|
9 | |||
10 | #----------------------------------------------------------------------------- |
|
10 | #----------------------------------------------------------------------------- | |
11 | # Globals |
|
11 | # Globals | |
12 | #----------------------------------------------------------------------------- |
|
12 | #----------------------------------------------------------------------------- | |
13 |
|
13 | |||
14 | #----------------------------------------------------------------------------- |
|
14 | #----------------------------------------------------------------------------- | |
15 | # Stream classes |
|
15 | # Stream classes | |
16 | #----------------------------------------------------------------------------- |
|
16 | #----------------------------------------------------------------------------- | |
17 |
|
17 | |||
18 | class OutStream(object): |
|
18 | class OutStream(object): | |
19 | """A file like object that publishes the stream to a 0MQ PUB socket.""" |
|
19 | """A file like object that publishes the stream to a 0MQ PUB socket.""" | |
20 |
|
20 | |||
21 | # The time interval between automatic flushes, in seconds. |
|
21 | # The time interval between automatic flushes, in seconds. | |
22 | flush_interval = 0.05 |
|
22 | flush_interval = 0.05 | |
23 | topic=None |
|
23 | topic=None | |
24 |
|
24 | |||
25 | def __init__(self, session, pub_socket, name): |
|
25 | def __init__(self, session, pub_socket, name): | |
|
26 | self.encoding = 'UTF-8' | |||
26 | self.session = session |
|
27 | self.session = session | |
27 | self.pub_socket = pub_socket |
|
28 | self.pub_socket = pub_socket | |
28 | self.name = name |
|
29 | self.name = name | |
29 | self.parent_header = {} |
|
30 | self.parent_header = {} | |
30 | self._new_buffer() |
|
31 | self._new_buffer() | |
31 |
|
32 | |||
32 | def set_parent(self, parent): |
|
33 | def set_parent(self, parent): | |
33 | self.parent_header = extract_header(parent) |
|
34 | self.parent_header = extract_header(parent) | |
34 |
|
35 | |||
35 | def close(self): |
|
36 | def close(self): | |
36 | self.pub_socket = None |
|
37 | self.pub_socket = None | |
37 |
|
38 | |||
38 | def flush(self): |
|
39 | def flush(self): | |
39 | #io.rprint('>>>flushing output buffer: %s<<<' % self.name) # dbg |
|
40 | #io.rprint('>>>flushing output buffer: %s<<<' % self.name) # dbg | |
40 | if self.pub_socket is None: |
|
41 | if self.pub_socket is None: | |
41 | raise ValueError(u'I/O operation on closed file') |
|
42 | raise ValueError(u'I/O operation on closed file') | |
42 | else: |
|
43 | else: | |
43 | data = self._buffer.getvalue() |
|
44 | data = self._buffer.getvalue() | |
44 | if data: |
|
45 | if data: | |
45 | content = {u'name':self.name, u'data':data} |
|
46 | content = {u'name':self.name, u'data':data} | |
46 | msg = self.session.send(self.pub_socket, u'stream', content=content, |
|
47 | msg = self.session.send(self.pub_socket, u'stream', content=content, | |
47 | parent=self.parent_header, ident=self.topic) |
|
48 | parent=self.parent_header, ident=self.topic) | |
48 |
|
49 | |||
49 | if hasattr(self.pub_socket, 'flush'): |
|
50 | if hasattr(self.pub_socket, 'flush'): | |
50 | # socket itself has flush (presumably ZMQStream) |
|
51 | # socket itself has flush (presumably ZMQStream) | |
51 | self.pub_socket.flush() |
|
52 | self.pub_socket.flush() | |
52 | self._buffer.close() |
|
53 | self._buffer.close() | |
53 | self._new_buffer() |
|
54 | self._new_buffer() | |
54 |
|
55 | |||
55 | def isatty(self): |
|
56 | def isatty(self): | |
56 | return False |
|
57 | return False | |
57 |
|
58 | |||
58 | def __next__(self): |
|
59 | def __next__(self): | |
59 | raise IOError('Read not supported on a write only stream.') |
|
60 | raise IOError('Read not supported on a write only stream.') | |
60 |
|
61 | |||
61 | if not py3compat.PY3: |
|
62 | if not py3compat.PY3: | |
62 | next = __next__ |
|
63 | next = __next__ | |
63 |
|
64 | |||
64 | def read(self, size=-1): |
|
65 | def read(self, size=-1): | |
65 | raise IOError('Read not supported on a write only stream.') |
|
66 | raise IOError('Read not supported on a write only stream.') | |
66 |
|
67 | |||
67 | def readline(self, size=-1): |
|
68 | def readline(self, size=-1): | |
68 | raise IOError('Read not supported on a write only stream.') |
|
69 | raise IOError('Read not supported on a write only stream.') | |
69 |
|
70 | |||
70 | def write(self, string): |
|
71 | def write(self, string): | |
71 | if self.pub_socket is None: |
|
72 | if self.pub_socket is None: | |
72 | raise ValueError('I/O operation on closed file') |
|
73 | raise ValueError('I/O operation on closed file') | |
73 | else: |
|
74 | else: | |
74 | # Make sure that we're handling unicode |
|
75 | # Make sure that we're handling unicode | |
75 | if not isinstance(string, unicode): |
|
76 | if not isinstance(string, unicode): | |
76 | enc = encoding.DEFAULT_ENCODING |
|
77 | string = string.decode(self.encoding, 'replace') | |
77 | string = string.decode(enc, 'replace') |
|
78 | ||
78 |
|
||||
79 | self._buffer.write(string) |
|
79 | self._buffer.write(string) | |
80 | current_time = time.time() |
|
80 | current_time = time.time() | |
81 | if self._start <= 0: |
|
81 | if self._start <= 0: | |
82 | self._start = current_time |
|
82 | self._start = current_time | |
83 | elif current_time - self._start > self.flush_interval: |
|
83 | elif current_time - self._start > self.flush_interval: | |
84 | self.flush() |
|
84 | self.flush() | |
85 |
|
85 | |||
86 | def writelines(self, sequence): |
|
86 | def writelines(self, sequence): | |
87 | if self.pub_socket is None: |
|
87 | if self.pub_socket is None: | |
88 | raise ValueError('I/O operation on closed file') |
|
88 | raise ValueError('I/O operation on closed file') | |
89 | else: |
|
89 | else: | |
90 | for string in sequence: |
|
90 | for string in sequence: | |
91 | self.write(string) |
|
91 | self.write(string) | |
92 |
|
92 | |||
93 | def _new_buffer(self): |
|
93 | def _new_buffer(self): | |
94 | self._buffer = StringIO() |
|
94 | self._buffer = StringIO() | |
95 | self._start = -1 |
|
95 | self._start = -1 |
General Comments 0
You need to be logged in to leave comments.
Login now