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#2912: Improvements to GlibURLDownloader API

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This commit is contained in:
Dan Williams 2007-08-20 16:48:28 -04:00
parent 8c113d5561
commit e83b98a8f6
2 changed files with 33 additions and 10 deletions
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1
NEWS
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@ -1,3 +1,4 @@
* #2912: Improvements to GlibURLDownloader API (dcbw)
* #2299: Really fix buddy properties coming through as arrays of bytes (dcbw)
Snapshot b24a28a77d

40
sugar/network.py
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@ -176,6 +176,8 @@ class GlibURLDownloader(gobject.GObject):
'finished': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT, gobject.TYPE_PYOBJECT])),
'error': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT])),
'progress': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE,
([gobject.TYPE_PYOBJECT]))
}
@ -189,15 +191,22 @@ class GlibURLDownloader(gobject.GObject):
self._srcid = 0
self._fname = None
self._outf = None
self._written = 0
gobject.GObject.__init__(self)
def start(self, destfile=None):
def start(self, destfile=None, destfd=None):
self._info = urllib.urlopen(self._url)
self._outf = None
self._fname = None
if destfd and not destfile:
raise ValueError("Must provide destination file too when specifying file descriptor")
if destfile:
self._suggested_fname = os.path.basename(destfile)
self._fname = os.path.abspath(os.path.expanduser(destfile))
if destfd:
# Use the user-supplied destination file descriptor
self._outf = destfd
else:
self._outf = os.open(self._fname, os.O_RDWR | os.O_TRUNC | os.O_CREAT, 0644)
else:
self._suggested_fname = self._get_filename_from_headers(self._info.headers)
@ -213,6 +222,11 @@ class GlibURLDownloader(gobject.GObject):
gobject.IO_IN | gobject.IO_ERR,
self._read_next_chunk)
def cancel(self):
if self._srcid == 0:
raise RuntimeError("Download already canceled or stopped")
self.cleanup(remove=True)
def _get_filename_from_headers(self, headers):
if not headers.has_key("Content-Disposition"):
return None
@ -231,8 +245,7 @@ class GlibURLDownloader(gobject.GObject):
def _read_next_chunk(self, source, condition):
if condition & gobject.IO_ERR:
self.cleanup()
os.remove(self._fname)
self.cleanup(remove=True)
self.emit("error", "Error downloading file.")
return False
elif not (condition & gobject.IO_IN):
@ -242,27 +255,36 @@ class GlibURLDownloader(gobject.GObject):
try:
data = self._info.fp.read(self.CHUNK_SIZE)
count = os.write(self._outf, data)
self._written += len(data)
# error writing data to file?
if count < len(data):
self.cleanup(remove=True)
self.emit("error", "Error writing to download file.")
return False
self.emit("progress", self._written)
# done?
if len(data) < self.CHUNK_SIZE:
self.cleanup()
self.emit("finished", self._fname, self._suggested_fname)
return False
if count < len(data):
self.cleanup()
self.emit("error", "Error writing to download file.")
return False
except Exception, err:
self.cleanup()
self.cleanup(remove=True)
self.emit("error", "Error downloading file: %s" % err)
return False
return True
def cleanup(self):
def cleanup(self, remove=False):
if self._srcid > 0:
gobject.source_remove(self._srcid)
self._srcid = 0
del self._info
self._info = None
os.close(self._outf)
if remove:
os.remove(self._fname)
self._outf = None