def create_paths(toyz_settings, tid, params):
"""
Creates a new path on the server (if it does not already exist).
Parameters
- toyz_settings ( :py:class:`toyz.utils.core.ToyzSettings`): Settings for the toyz
application
- tid (*string* ): Task ID of the client user running the task
- params (*dict* ): Any parameters sent by the client (see *params* below)
Params
- path (*string* ): path to create on the server
Response
id: 'create_folder',
status (*string* ): 'success',
path (*string* ): path created on the server
"""
core.check4keys(params, ['path', 'new_folder'])
path = os.path.join(params['path'], params['new_folder'])
permissions = file_access.get_parent_permissions(toyz_settings.db,
path, user_id=tid['user_id'])
if 'w' not in permissions and 'x' not in permissions:
raise ToyzJobError("You do not have permission to create path {0}".format(path))
core.create_paths(path)
response = {
'id': 'notification',
'msg': 'Created path'.format(path),
'func': 'create_dir'
}
return response
def create_tile(file_info, img_info, tile_info):
try:
from PIL import Image
except ImportError:
raise ToyzJobError(
"You must have PIL (Python Imaging Library) installed to "
"open files of this type"
)
if file_info['ext']=='fits':
try:
from matplotlib import cm as cmap
from matplotlib.colors import Normalize, LinearSegmentedColormap
except ImportError:
raise ToyzJobError("You must have matplotlib installed to load FITS images")
hdulist = get_file(file_info)
data = hdulist[int(img_info['frame'])].data
# If no advanced resampling algorithm is used, scale the data as quickly as possible.
# Otherwise crop the data.
if file_info['resampling'] == 'NEAREST':
data = scale_data(file_info, img_info, tile_info, data)
else:
data = data[
tile_info['y0_idx']:tile_info['yf_idx'],
tile_info['x0_idx']:tile_info['xf_idx']]
# FITS images have a flipped y-axis from what browsers and other image formats expect
if img_info['invert_y']:
data = np.flipud(data)
if img_info['invert_x']:
data = np.fliplr(data)
norm = Normalize(img_info['colormap']['px_min'], img_info['colormap']['px_max'], True)
colormap_name = img_info['colormap']['name']
if img_info['colormap']['invert_color']:
colormap_name = colormap_name + '_r'
colormap = getattr(cmap, colormap_name)
cm = cmap.ScalarMappable(norm, colormap)
img = np.uint8(cm.to_rgba(data)*255)
img = Image.fromarray(img)
if file_info['resampling'] != 'NEAREST':
img = img.resize(
(tile_info['width'], tile_info['height']),
getattr(Image, file_info['resampling']))
else:
img = get_file(file_info)
img = img.crop((
tile_info['x0_idx'], tile_info['y0_idx'],
tile_info['xf_idx'],
tile_info['yf_idx']))
img = img.resize(
(tile_info['width'], tile_info['height']), getattr(Image, file_info['resampling']))
width, height = img.size
if width>0 and height>0:
path = os.path.dirname(tile_info['new_filepath'])
core.create_paths([path])
img.save(tile_info['new_filepath'], format=img_formats[file_info['tile_format']])
else:
return False, ''
return True, tile_info
def run_sextractor(toyz_settings, tid, params):
"""
Run sextractor using parameters defined in the client
"""
import astrotoyz.astromatic.sex as sex
import toyz.utils.db
import shutil
core.check4keys(params, ['config', 'params', 'filename'])
shortcuts = toyz.utils.db.get_param(toyz_settings.db, 'shortcuts', user_id=tid['user_id'])
# Just in case the user did something dumb, like remove his/her temp path
if 'temp' not in shortcuts:
raise ToyJobError("You removed your 'temp' shortcut, DON'T DO THAT!" +
"Refresh your browser and it will be restored")
# Create a path for temporary files that will be erased once this has been completed
temp_path = os.path.join(shortcuts['temp'], tid['session_id'], str(tid['request_id']))
core.create_paths(temp_path)
# Run SExtractor
params['temp_path'] = temp_path
result = sex.run_sextractor(**params)
# Remove the temporary path form the server
#shutil.rmtree(temp_path)
if result!='success':
response = {
'id': 'ERROR',
'error': result
}
else:
response = {
'id': 'run_sextractor',
'result': result
}
return response
def create_paths(toyz_settings, tid, params):
"""
Creates a new path on the server (if it does not already exist).
Parameters
- toyz_settings ( :py:class:`toyz.utils.core.ToyzSettings`): Settings for the toyz
application
- tid (*string* ): Task ID of the client user running the task
- params (*dict* ): Any parameters sent by the client (see *params* below)
Params
- path (*string* ): path to create on the server
Response
id: 'create_folder',
status (*string* ): 'success',
path (*string* ): path created on the server
"""
core.check4keys(params, ['path', 'new_folder'])
path = os.path.join(params['path'], params['new_folder'])
permissions = file_access.get_parent_permissions(toyz_settings.db,
path,
user_id=tid['user_id'])
if 'w' not in permissions and 'x' not in permissions:
raise ToyzJobError(
"You do not have permission to create path {0}".format(path))
core.create_paths(path)
response = {
'id': 'notification',
'msg': 'Created path'.format(path),
'func': 'create_dir'
}
return response
def run_sextractor(toyz_settings, tid, params):
"""
Run sextractor using parameters defined in the client
"""
import astrotoyz.astromatic.sex as sex
import toyz.utils.db
import shutil
core.check4keys(params, ['config', 'params', 'filename'])
shortcuts = toyz.utils.db.get_param(toyz_settings.db,
'shortcuts',
user_id=tid['user_id'])
# Just in case the user did something dumb, like remove his/her temp path
if 'temp' not in shortcuts:
raise ToyJobError("You removed your 'temp' shortcut, DON'T DO THAT!" +
"Refresh your browser and it will be restored")
# Create a path for temporary files that will be erased once this has been completed
temp_path = os.path.join(shortcuts['temp'], tid['session_id'],
str(tid['request_id']))
core.create_paths(temp_path)
# Run SExtractor
params['temp_path'] = temp_path
result = sex.run_sextractor(**params)
# Remove the temporary path form the server
#shutil.rmtree(temp_path)
if result != 'success':
response = {'id': 'ERROR', 'error': result}
else:
response = {'id': 'run_sextractor', 'result': result}
return response
def create_tile(file_info, img_info, tile_info):
try:
from PIL import Image
except ImportError:
raise ToyzJobError(
"You must have PIL (Python Imaging Library) installed to "
"open files of this type")
if file_info['ext'] == 'fits':
try:
from matplotlib import cm as cmap
from matplotlib.colors import Normalize, LinearSegmentedColormap
except ImportError:
raise ToyzJobError(
"You must have matplotlib installed to load FITS images")
hdulist = get_file(file_info)
data = hdulist[int(img_info['frame'])].data
# If no advanced resampling algorithm is used, scale the data as quickly as possible.
# Otherwise crop the data.
if file_info['resampling'] == 'NEAREST':
data = scale_data(file_info, img_info, tile_info, data)
else:
data = data[tile_info['y0_idx']:tile_info['yf_idx'],
tile_info['x0_idx']:tile_info['xf_idx']]
# FITS images have a flipped y-axis from what browsers and other image formats expect
if img_info['invert_y']:
data = np.flipud(data)
if img_info['invert_x']:
data = np.fliplr(data)
norm = Normalize(img_info['colormap']['px_min'],
img_info['colormap']['px_max'], True)
colormap_name = img_info['colormap']['name']
if img_info['colormap']['invert_color']:
colormap_name = colormap_name + '_r'
colormap = getattr(cmap, colormap_name)
cm = cmap.ScalarMappable(norm, colormap)
img = np.uint8(cm.to_rgba(data) * 255)
img = Image.fromarray(img)
if file_info['resampling'] != 'NEAREST':
img = img.resize((tile_info['width'], tile_info['height']),
getattr(Image, file_info['resampling']))
else:
img = get_file(file_info)
img = img.crop((tile_info['x0_idx'], tile_info['y0_idx'],
tile_info['xf_idx'], tile_info['yf_idx']))
img = img.resize((tile_info['width'], tile_info['height']),
getattr(Image, file_info['resampling']))
width, height = img.size
if width > 0 and height > 0:
path = os.path.dirname(tile_info['new_filepath'])
core.create_paths([path])
img.save(tile_info['new_filepath'],
format=img_formats[file_info['tile_format']])
else:
return False, ''
return True, tile_info
def new_session(self, user_id, websocket, session_id=None):
"""
Open a new websocket session for a given user
Parameters
user_id ( :py:class:`toyz.utils.core.ToyzUser` ): User id
websocket (:py:class:`toyz.web.app.WebSocketHandler` ): new websocket opened
"""
import datetime
if user_id not in self.user_sessions:
self.user_sessions[user_id] = {}
print("Users logged in:", self.user_sessions.keys())
if session_id is None:
session_id = str(datetime.datetime.now()).replace(
' ', '__').replace('.', '-').replace(':', '_')
self.user_sessions[user_id][session_id] = websocket
shortcuts = db_utils.get_param(self.toyz_settings.db,
'shortcuts',
user_id=user_id)
shortcuts = core.check_user_shortcuts(self.toyz_settings, user_id,
shortcuts)
websocket.session = {
'user_id': user_id,
'session_id': session_id,
'path': os.path.join(shortcuts['temp'], session_id),
}
core.create_paths(websocket.session['path'])
#initialize process for session jobs
websocket.job_pipe, remote_pipe = multiprocessing.Pipe()
websocket.process = multiprocessing.Process(target=job_process,
args=(session_id,
remote_pipe,
websocket.job_pipe))
websocket.process.start()
remote_pipe.close()
process_events = (tornado.ioloop.IOLoop.READ
| tornado.ioloop.IOLoop.ERROR)
tornado.ioloop.IOLoop.current().add_handler(websocket.job_pipe,
websocket.send_response,
process_events)
websocket.write_message({
'id': 'initialize',
'user_id': user_id,
'session_id': session_id,
})
def new_session(self, user_id, websocket, session_id=None):
"""
Open a new websocket session for a given user
Parameters
user_id ( :py:class:`toyz.utils.core.ToyzUser` ): User id
websocket (:py:class:`toyz.web.app.WebSocketHandler` ): new websocket opened
"""
import datetime
if user_id not in self.user_sessions:
self.user_sessions[user_id] = {}
print("Users logged in:", self.user_sessions.keys())
if session_id is None:
session_id = str(
datetime.datetime.now()).replace(' ','__').replace('.','-').replace(':','_')
self.user_sessions[user_id][session_id] = websocket
shortcuts = db_utils.get_param(self.toyz_settings.db, 'shortcuts',
user_id=user_id)
shortcuts = core.check_user_shortcuts(self.toyz_settings, user_id, shortcuts)
websocket.session = {
'user_id': user_id,
'session_id': session_id,
'path': os.path.join(shortcuts['temp'], session_id),
}
core.create_paths(websocket.session['path'])
#initialize process for session jobs
websocket.job_pipe, remote_pipe = multiprocessing.Pipe()
websocket.process = multiprocessing.Process(
target = job_process, args=(session_id, remote_pipe, websocket.job_pipe))
websocket.process.start()
remote_pipe.close()
process_events = (tornado.ioloop.IOLoop.READ | tornado.ioloop.IOLoop.ERROR)
tornado.ioloop.IOLoop.current().add_handler(
websocket.job_pipe, websocket.send_response, process_events)
websocket.write_message({
'id': 'initialize',
'user_id': user_id,
'session_id': session_id,
})