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DriveConnexion_insert_postgreSQL.py
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DriveConnexion_insert_postgreSQL.py
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import io
import os
import httplib2
import googleapiclient
from googleapiclient import discovery
import oauth2client
from oauth2client import client
from oauth2client import tools
from oauth2client import file
import postgresql
import utils_Json_Postgres
from postgresql import exceptions
import time
import datetime
try:
import argparse
flags = argparse.ArgumentParser(parents=[tools.argparser]).parse_args()
except ImportError:
flags = None
############################################################
# Déclaration de variables nécessaire à l'exécution du code
###########################################################
SCOPES = 'https://www.googleapis.com/auth/drive'
CLIENT_SECRET_FILE = 'client_secret2.json'
APPLICATION_NAME = 'Drive API Python Quickstart'
# chemin de la branche principale pour la création du fichier credentials (droit d'accès au drive)
home_dir = 'C:/monChemin/LDSA_velov_JSON_to_SQL/'
# chemin pour la création du fichier temporaire
outpath = 'C:/monChemin/LDSA_velov_JSON_to_SQL/drive/'
format_f = 'json'
# international resource identifier
IRI = 'pq://admin:admin@localhost:5432/'
# bd préalablement construite sur postgre
database_name = 'velov'
# nom de la table
table_name = 'velov'
# script sql création de la table velov
sql_table = "CREATE TABLE {} (" \
"id SERIAL PRIMARY KEY," \
"number INTEGER NOT NULL," \
"name VARCHAR(36) NOT NULL," \
"address VARCHAR(65) NOT NULL," \
"address2 VARCHAR(48)," \
"commune VARCHAR(16) NOT NULL," \
"nmarrond INTEGER," \
"bonus VARCHAR(3) NOT NULL," \
"pole VARCHAR(61) NOT NULL," \
"lat DECIMAL(18) NOT NULL," \
"lng DECIMAL(18) NOT NULL," \
"bike_stands INTEGER NOT NULL," \
"status VARCHAR(6) NOT NULL," \
"available_bike_stands INTEGER NOT NULL," \
"available_bikes INTEGER NOT NULL," \
"availabilitycode INTEGER NOT NULL," \
"availability VARCHAR(6) NOT NULL," \
"banking VARCHAR(5) NOT NULL," \
"gid INTEGER NOT NULL," \
"last_update TIMESTAMP WITHOUT TIME ZONE NOT NULL," \
"last_update_fme TIMESTAMP WITHOUT TIME ZONE NOT NULL)".format(table_name)
# déclaration de set pour la transformation avant insert
set_int = {'available_bike_stands', 'gid', 'nmarrond', 'availabilitycode',
'bike_stands', 'available_bikes', 'number'}
set_float = {'lat', 'lng'}
set_date = {'last_update', 'last_update_fme'}
def get_credentials():
#déclaration du chemin
credential_dir = os.path.join(home_dir, '.credentials')
#vérification de l'existence du dossier, et création si besoin
if not os.path.exists(credential_dir):
os.makedirs(credential_dir)
credential_path = os.path.join(credential_dir, 'drive-python-quickstart.json')
#ouverture
store = oauth2client.file.Storage(credential_path)
credentials = store.get()
#verification de la validité des credential
if not credentials or credentials.invalid:
flow = client.flow_from_clientsecrets(CLIENT_SECRET_FILE, SCOPES)
flow.user_agent = APPLICATION_NAME
if flags:
credentials = tools.run_flow(flow, store, flags)
else:
credentials = tools.run(flow, store)
print('Storing credentials to ' + credential_path)
return credentials
# fonction principale de chargement et insertion du fichier dans la base
def dl_insert(param_results, param_s_f, param_outpath, param_format_f, param_IRI, param_database_name, param_table_name):
start_time = time.time()
db = postgresql.open(param_IRI + param_database_name)
nb_files = 0
#récupération des fichiers
items = param_results.get('files', [])
if not items:
print('No files found.')
else:
print('Files:')
for item in items:
print('{0} ({1})'.format(item['name'], item['id']))
file_id = item['id']
file_name = item['name']
# filtrage sur le 26/01
if file_name[0:10] == '26/01/2016':
nb_files += 1
print("*******Chargement et traitement du fichier******", file_name)
file_name = file_name.replace("/", "_").replace(" ", "_").replace(":", "_")
# chargement get_media
request = param_s_f.get_media(fileId=file_id)
outfilename = param_outpath+file_name+"."+param_format_f
outfile = io.FileIO(outfilename, mode='w+')
downloader = googleapiclient.http.MediaIoBaseDownload(outfile, request)
done = False
while done is False:
status, done = downloader.next_chunk()
#vérification de l'ouverture de la connexion à la BDD
if db.closed:
print("!!Connexion réouverte!!")
db = postgresql.open(param_IRI + param_database_name)
data, d = utils_Json_Postgres.data_create(outfilename, False, set_int, set_float, set_date)
# Déclaration et préparation de la requête d'insertion
sql_insert = utils_Json_Postgres.cons_insert(param_table_name, data)
statement = None
try:
statement = db.prepare(sql_insert)
except exceptions.DuplicateTableError:
print("Une exception est soulevée!!! Erreur sur la requête d'insertion")
utils_Json_Postgres.insertion(data, d, statement)
print("Tps execution pour le chargement et l'insertion des %s fichiers" % nb_files)
print(" --- %s seconds ---" % (time.time() - start_time))
return nb_files
def main():
start_time = time.time()
nb_files_tot = 0
# Ouverture et connexion à la bd
db = postgresql.open(IRI + database_name)
# Création de la table 'velov'
utils_Json_Postgres.create_table(db, sql_table, table_name, database_name)
credentials = get_credentials()
http = credentials.authorize(httplib2.Http())
service = discovery.build('drive', 'v3', http=http, credentials=credentials)
s_f = service.files()
results = s_f.list(pageSize=1000, fields="nextPageToken, files(id, name)").execute()
# id de la page suivante pour n'oublier aucun fichier
n_p_t = results.get('nextPageToken')
nb_files_tot = nb_files_tot + dl_insert(results, s_f, outpath, format_f, IRI, database_name,table_name)
while n_p_t is not None and nb_files_tot < 1282:
print("************Nouvelle page du Drive**************")
results = s_f.list(pageSize=1000, pageToken = n_p_t, fields="nextPageToken, files(id, name)").execute()
# id de la page suivante pour n'oublier aucun fichier
n_p_t = results.get('nextPageToken')
nb_files_tot = nb_files_tot + dl_insert(results, s_f, outpath, format_f, IRI, database_name,table_name)
print("nb tot: %s" % nb_files_tot)
tmp = time.time() - start_time
tmp = str(datetime.timedelta(seconds=tmp))
print(" Fin du script en --- %s ---" % tmp)
if __name__ == '__main__':
main()