Mercurial > public > scc_access / file revision
scc_access.py@a172f26a566a
scc_access.py
Tue, 23 Jun 2015 10:30:08 +0300
- author
- Iannis <ioannis@inoe.ro>
- date
- Tue, 23 Jun 2015 10:30:08 +0300
- changeset 0
- a172f26a566a
- child 1
- 783c8a0db76f
- permissions
- -rw-r--r--
Initial commit.
#!/usr/bin/env python """ The MIT License (MIT) Copyright (c) 2015, Ioannis Binietoglou 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. """ # Try to read the settings from the settings.py file try: from settings import * except: raise ImportError( """A settings file (setting.py) is required to run the script. You can use settings.sample.py for a template.""") import requests import urlparse import argparse import os import re import time import StringIO from zipfile import ZipFile import datetime # Construct the absolute URLs LOGIN_URL = urlparse.urljoin(BASE_URL, 'accounts/login/') UPLOAD_URL = urlparse.urljoin(BASE_URL, 'data_processing/measurements/quick/') DOWNLOAD_PREPROCESSED = urlparse.urljoin(BASE_URL, 'data_processing/measurements/{0}/download-preprocessed/') DOWNLOAD_OPTICAL = urlparse.urljoin(BASE_URL, 'data_processing/measurements/{0}/download-optical/') DOWNLOAD_GRAPH = urlparse.urljoin(BASE_URL, 'data_processing/measurements/{0}/download-plots/') DELETE_MEASUREMENT = urlparse.urljoin(BASE_URL, 'admin/database/measurements/{0}/delete/') API_BASE_URL = urlparse.urljoin(BASE_URL, 'api/v1/') # The regex to find the measurement id from the measurement page # This should be read from the uploaded file, but would require an extra module regex = "<h3>Measurement (?P<measurement_id>.{12}) <small>" class SCC: """ A simple class that will attempt to upload a file on the SCC server. The uploading is done by simulation a normal browser session. In the current version no check is performed, and no feedback is given if the upload was successful. If everything is setup correctly, it will work. """ def __init__(self, auth = BASIC_LOGIN, output_dir = OUTPUT_DIR): self.auth = auth self.output_dir = OUTPUT_DIR self.session = requests.Session() def login(self, credential = DJANGO_LOGIN): """ Login the the website. """ self.login_credentials = {'username': credential[0], 'password': credential[1]} # Get upload form login_page = self.session.get(LOGIN_URL, auth = self.auth, verify = False) # Submit the login data login_submit = self.session.post(LOGIN_URL, data = self.login_credentials, headers = {'X-CSRFToken': login_page.cookies['csrftoken'], 'referer': LOGIN_URL}, verify = False, auth = self.auth) return login_submit def logout(self): pass def upload_file(self, filename, system_id): """ Upload a filename for processing with a specific system. If the upload is successful, it returns the measurement id. """ # Get submit page upload_page = self.session.get(UPLOAD_URL, auth = self.auth, verify = False) # Submit the data upload_data = {'system': system_id} files = {'data': open(filename, 'rb')} print "Uploading of file %s started." % filename upload_submit = self.session.post(UPLOAD_URL, data = upload_data, files = files, headers = {'X-CSRFToken': upload_page.cookies['csrftoken'], 'referer': UPLOAD_URL}, verify = False, auth = self.auth) if upload_submit.status_code != 200: print "Connection error. Status code: %s" % upload_submit.status_code return False measurement_id = True # Check if there was a redirect to a new page. if upload_submit.url == UPLOAD_URL: measurement_id = False print "Uploaded file rejected! Try to upload manually to see the error." else: measurement_id = re.findall(regex, upload_submit.text)[0] print "Successfully uploaded measurement with id %s." % measurement_id return measurement_id def download_files(self, measurement_id, subdir, download_url): """ Downloads some files from the download_url to the specified subdir. This method is used to download preprocessed file, optical files etc. """ # Get the file request = self.session.get(download_url, auth = self.auth, verify = False, stream=True) # Create the dir if it does not exist local_dir = os.path.join(self.output_dir, measurement_id, subdir) if not os.path.exists(local_dir): os.makedirs(local_dir) # Save the file by chunk, needed if the file is big. memory_file = StringIO.StringIO() for chunk in request.iter_content(chunk_size=1024): if chunk: # filter out keep-alive new chunks memory_file.write(chunk) memory_file.flush() zip_file = ZipFile(memory_file) for ziped_name in zip_file.namelist(): basename = os.path.basename(ziped_name) local_file = os.path.join(local_dir, basename) with open(local_file, 'wb') as f: f.write(zip_file.read(ziped_name)) def download_preprocessed(self, measurement_id): """ Download preprocessed files for the measurement id. """ # Construct the download url download_url = DOWNLOAD_PREPROCESSED.format(measurement_id) self.download_files(measurement_id, 'scc_preprocessed', download_url) def download_optical(self, measurement_id): """ Download optical files for the measurement id. """ # Construct the download url download_url = DOWNLOAD_OPTICAL.format(measurement_id) self.download_files(measurement_id, 'scc_optical', download_url) def download_graphs(self, measurement_id): """ Download profile graphs for the measurement id. """ # Construct the download url download_url = DOWNLOAD_GRAPH.format(measurement_id) self.download_files(measurement_id, 'scc_plots', download_url) def process(self, filename, system_id): """ Upload a file for processing and wait for the processing to finish. If the processing is successful, it will download all produced files. """ print "--- Processing started on %s. ---" % datetime.datetime.now() # Upload file measurement_id = self.upload_file(filename, system_id) measurement = None if measurement_id: measurement = self.get_measurement(measurement_id) while measurement.is_running: print "Measurement is being processed (status: %s, %s, %s). Please wait." % (measurement.upload, measurement.pre_processing, measurement.opt_retrievals) time.sleep(10) measurement = self.get_measurement(measurement_id) print "Measurement processing finished (status: %s, %s, %s)." % (measurement.upload, measurement.pre_processing, measurement.opt_retrievals) if measurement.pre_processing == 127: print "Downloading preprocessed files." self.download_preprocessed(measurement_id) if measurement.opt_retrievals == 127: print "Downloading optical files." self.download_optical(measurement_id) print "Downloading graphs." self.download_graphs(measurement_id) print "--- Processing finished. ---" return measurement def get_status(self, measurement_id): """ Get the processing status for a measurement id through the API. """ measurement_url = urlparse.urljoin(API_BASE_URL, 'measurements/?id__exact=%s' % measurement_id) response = self.session.get(measurement_url, auth = self.auth, verify = False) response_dict = response.json() if response_dict['objects']: measurement_list = response_dict['objects'] measurement = Measurement(measurement_list[0]) return (measurement.upload, measurement.pre_processing, measurement.opt_retrievals) else: print "No measurement with id %s found on the SCC." % measurement_id return None def get_measurement(self, measurement_id): measurement_url = urlparse.urljoin(API_BASE_URL, 'measurements/%s/' % measurement_id) response = self.session.get(measurement_url, auth = self.auth, verify = False) response_dict = response.json() if response_dict: measurement = Measurement(response_dict) return measurement else: print "No measurement with id %s found on the SCC." % measurement_id return None def delete_measurement(self, measurement_id): """ Deletes a measurement with the provided measurement id. The user should have the appropriate permissions. The procedures is performed directly through the web interface and NOT through the API. """ # Get the measurement object measurement = self.get_measurement(measurement_id) # Check that it exists if measurement is None: print "Nothing to delete." return None # Go the the page confirming the deletion delete_url = DELETE_MEASUREMENT.format(measurement.id) confirm_page = self.session.get(delete_url, auth = self.auth, verify = False) # Check that the page opened properly if confirm_page.status_code != 200: print "Could not open delete page. Status: {0}".format(confirm_page.status_code) return None # Delete the measurement delete_page = self.session.post(delete_url, auth=self.auth, verify=False, data={'post':'yes'}, headers={'X-CSRFToken': confirm_page.cookies['csrftoken'], 'referer': delete_url} ) if delete_page.status_code != 200: print "Something went wrong. Delete page status: {0}".format( delete_page.status_code) return None print "Deleted measurement {0}".format(measurement_id) return True def available_measurements(self): """ Get a list of available measurement on the SCC. """ measurement_url = urlparse.urljoin(API_BASE_URL, 'measurements') response = self.session.get(measurement_url, auth = self.auth, verify = False) response_dict = response.json() measurements = None if response_dict: measurement_list = response_dict['objects'] measurements = [Measurement(measurement_dict) for measurement_dict in measurement_list] print "Found %s measurements on the SCC." % len(measurements) else: print "No response received from the SCC when asked for available measurements." return measurements def measurement_id_for_date(self, t1, call_sign = 'bu', base_number = 0): """ Give the first available measurement id on the SCC for the specific date. """ date_str = t1.strftime('%Y%m%d') search_url = urlparse.urljoin(API_BASE_URL, 'measurements/?id__startswith=%s' % date_str) response = self.session.get(search_url, auth = self.auth, verify = False) response_dict = response.json() measurement_id = None if response_dict: measurement_list = response_dict['objects'] existing_ids = [measurement_dict['id'] for measurement_dict in measurement_list] measurement_number = base_number measurement_id = "%s%s%02i" % (date_str, call_sign, measurement_number) while measurement_id in existing_ids: measurement_number = measurement_number + 1 measurement_id = "%s%s%02i" % (date_str, call_sign, measurement_number) if measurement_number == 100: raise ValueError('No available measurement id found.') return measurement_id class ApiObject: """ A generic class object. """ def __init__(self, dict_response): if dict_response: # Add the dictionary key value pairs as object properties for key, value in dict_response.items(): setattr(self, key, value) self.exists = True else: self.exists = False class Measurement(ApiObject): """ This class represents the measurement object as returned in the SCC API. """ @property def is_running(self): """ Returns True if the processing has not finished. """ if self.upload == 0: return False if self.pre_processing == -127: return False if self.pre_processing == 127: if self.opt_retrievals in [127, -127]: return False return True def delete(self): """ Delete the entry from the SCC database. """ def __str__(self): return "%s: %s, %s, %s" % (self.id, self.upload, self.pre_processing, self.opt_retrievals) def upload_file(filename, system_id, auth = BASIC_LOGIN, credential = DJANGO_LOGIN): """ Shortcut function to upload a file to the SCC. """ scc = SCC(auth) scc.login(credential) measurement_id = scc.upload_file(filename, system_id) scc.logout() return measurement_id def process_file(filename, system_id, auth = BASIC_LOGIN, credential = DJANGO_LOGIN): """ Shortcut function to process a file to the SCC. """ scc = SCC(auth) scc.login(credential) measurement = scc.process(filename, system_id) scc.logout() return measurement def delete_measurement(measurement_id, auth = BASIC_LOGIN, credential = DJANGO_LOGIN): """ Shortcut function to delete a measurement from the SCC. """ scc = SCC(auth) scc.login(credential) scc.delete_measurement(measurement_id) scc.logout() # When running through terminal if __name__ == '__main__': # Define the command line arguments. parser = argparse.ArgumentParser() parser.add_argument("filename", nargs='?', help = "Measurement file name or path.", default='') parser.add_argument("system", nargs='?', help = "Processing system id.", default=0) parser.add_argument("-p", "--process", help="Wait for the results of the processing.", action="store_true") parser.add_argument("-d", "--delete", help="Measurement ID to delete.") args = parser.parse_args() # If the arguments are OK, try to login on the site and upload. if args.delete: # If the delete is provided, do nothing else delete_measurement(args.delete) else: if (args.filename == '') or (args.system == 0): parser.error('Provide a valid filename and system parameters.\nRun with -h for help.\n') if args.process: process_file(args.filename, args.system) else: upload_file(args.filename, args.system)
