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# -*- coding: utf-8 -*-
#
# PartMgr - Price fetching
#
# Copyright 2015-2022 Michael Buesch <m@bues.ch>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
from partmgr.core.parameter import *
from partmgr.core.util import *
import http.client
import urllib.parse
class PriceFetcher:
"""Part price fetcher."""
class Error(Exception):
pass
class Result:
FOUND = True
NOTFOUND = False
def __init__(self,
orderCode = None,
price = 0.0,
status = FOUND,
currency = Param_Currency.CURR_EUR):
self.orderCode = orderCode
self.price = price
self.status = status
self.currency = currency
def __repr__(self):
if self.status == self.FOUND:
curr = Param_Currency.CURRNAMES[self.currency][0]
return "%s: %.2f %s" % (
self.orderCode, self.price, curr)
else:
return "%s: not found" % self.orderCode
supplierNames = None
host = None
_registeredFetchers = []
_defaultHttpHeaders = {
"User-Agent" : "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:105.0) Gecko/20100101 Firefox/105.0",
"Accept" : "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
"Accept-Language" : "*",
"Accept-Charset" : "utf-8,*;q=0.9",
}
@classmethod
def register(cls):
PriceFetcher._registeredFetchers.append(cls)
@classmethod
def get(cls, wantedSupplierName):
stripCs = "/\\_-,.;:\"'()|"
wantedSupplierName = wantedSupplierName.lower().strip().strip(stripCs).strip()
for fetcher in cls._registeredFetchers:
if wantedSupplierName in (n.lower().strip().strip(stripCs).strip()
for n in fetcher.supplierNames):
return fetcher
return None
def __init__(self, tls = True):
self.conn = None
self.tls = tls
def __del__(self):
try:
self.disconnect()
except Exception as e:
pass
def _relax(self):
pass
def _sendRequest(self, method, url, body=None, headers={}):
if not headers:
headers = self._defaultHttpHeaders
self.conn.request(method, url, body, headers)
self._relax()
def _getResponse(self, withHeaders = False):
self._relax()
response = self.conn.getresponse()
self._relax()
data = response.read()
self._relax()
if withHeaders:
return data, response.getheaders()
return data
def connect(self):
if not self.conn:
try:
if self.tls:
self.conn = http.client.HTTPSConnection(self.host)
else:
self.conn = http.client.HTTPConnection(self.host)
except http.client.HTTPException as e:
raise self.Error("Error while connecting to %s:\n%s" % (
self.supplierNames[0], str(e)))
def disconnect(self):
if self.conn:
try:
self.conn.close()
except http.client.HTTPException as e:
pass
self.conn = None
def _getPrice(self, orderCode):
raise NotImplementedError
def getPrices(self, orderCodes,
preCallback=None,
postCallback=None):
for orderCode in orderCodes:
tries = 0
while 1:
tries += 1
try:
if preCallback:
preCallback(orderCode)
yield self._getPrice(orderCode)
if postCallback:
postCallback(orderCode)
except http.client.HTTPException as e:
if tries < 5:
print("Price fetch %s '%s' failed. Retrying..." % (
self.supplierNames[0], orderCode))
self.disconnect()
continue
raise self.Error("Error while processing %s '%s':\n%s" % (
self.supplierNames[0], orderCode, str(e)))
except self.Error as e:
raise self.Error("Error while processing %s '%s':\n%s" % (
self.supplierNames[0], orderCode, str(e)))
break
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