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#!/usr/bin/env python
#
# Copyright (c) 2013 Martin Abente Lahaye. - tch@sugarlabs.org
#Permission is hereby granted, free of charge, to any person obtaining a copy
#of this software and associated documentation files (the "Software"), to deal
#in the Software without restriction, including without limitation the rights
#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#copies of the Software, and to permit persons to whom the Software is
#furnished to do so, subject to the following conditions:
#The above copyright notice and this permission notice shall be included in
#all copies or substantial portions of the Software.
#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
#THE SOFTWARE.
import pycurl
import urllib
from gi.repository import GObject
from twr_account import TwrAccount
class TwrObject(GObject.GObject):
__gsignals__ = {
'transfer-completed': (GObject.SignalFlags.RUN_FIRST, None, ([str])),
'transfer-progress': (GObject.SignalFlags.RUN_FIRST, None, \
([float, float, str])),
'transfer-failed': (GObject.SignalFlags.RUN_FIRST, None, ([str])),
'transfer-started': (GObject.SignalFlags.RUN_FIRST, None, ([]))}
def _gen_header(self, method, url, params=[]):
authorization = TwrAccount.authorization_header(method, url, params)
headers = ['Host: api.twitter.com',
'Authorization: %s' % authorization]
return headers
def _update_cb(self, down_total, down_done, up_total, up_done, states):
if 2 in states:
return
total = up_total
done = up_done
mode = 'upload'
if 1 in states:
total = down_total
done = down_done
mode = 'download'
if total == 0:
return
if 0 not in states:
self.emit('transfer-started')
states.append(0)
self.emit('transfer-progress', total, done, mode)
state = states[-1]
if total == done and state in states and len(states) == state + 1:
states.append(state + 1)
def request(self, method, url, params, filepath=None):
c = pycurl.Curl()
if method == 'POST':
c.setopt(c.POST, 1)
c.setopt(c.HTTPHEADER, self._gen_header(method, url))
if filepath is not None:
params += [("media", (c.FORM_FILE, filepath))]
if params is not None:
c.setopt(c.HTTPPOST, params)
else:
c.setopt(c.POSTFIELDS, '')
else:
c.setopt(c.HTTPGET, 1)
c.setopt(c.HTTPHEADER, self._gen_header(method, url, params))
url += '?%s' % urllib.urlencode(params)
# XXX hack to trace transfer states
states = []
def pre_update_cb(*args):
args = list(args) + [states]
self._update_cb(*args)
#XXX hack to write multiple responses
buffer = []
def __write_cb(data):
buffer.append(data)
c.setopt(c.URL, url)
c.setopt(c.NOPROGRESS, 0)
c.setopt(c.PROGRESSFUNCTION, pre_update_cb)
c.setopt(c.WRITEFUNCTION, __write_cb)
#c.setopt(c.VERBOSE, True)
try:
c.perform()
except pycurl.error, e:
self.emit('transfer-failed', str(e))
else:
code = c.getinfo(c.HTTP_CODE)
if code != 200:
self.emit('transfer-failed', 'HTTP code %s' % code)
finally:
self.emit('transfer-completed', ''.join(buffer))
c.close()
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