| 1 | ## $Id: helpers.py 13601 2016-01-12 10:54:44Z henrik $ |
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| 2 | ## |
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| 3 | ## Copyright (C) 2012 Uli Fouquet & Henrik Bettermann |
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| 4 | ## This program is free software; you can redistribute it and/or modify |
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| 5 | ## it under the terms of the GNU General Public License as published by |
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| 6 | ## the Free Software Foundation; either version 2 of the License, or |
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| 7 | ## (at your option) any later version. |
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| 8 | ## |
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| 9 | ## This program is distributed in the hope that it will be useful, |
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| 10 | ## but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 12 | ## GNU General Public License for more details. |
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| 13 | ## |
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| 14 | ## You should have received a copy of the GNU General Public License |
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| 15 | ## along with this program; if not, write to the Free Software |
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| 16 | ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 17 | ## |
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| 18 | """General helper functions for the interswitch module in custom packages. |
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| 19 | """ |
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| 20 | from datetime import datetime |
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| 21 | import httplib |
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| 22 | import hashlib |
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| 23 | import json |
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| 24 | from urllib import urlencode |
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| 25 | import grok |
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| 26 | from xml.dom.minidom import parseString |
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| 27 | from zope.event import notify |
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| 28 | from kofacustom.nigeria.interfaces import MessageFactory as _ |
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| 29 | |
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| 30 | def SOAP_post(soap_action, xml, host, url, https): |
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| 31 | """Handles making the SOAP request. |
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| 32 | |
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| 33 | Further reading: |
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| 34 | http://testwebpay.interswitchng.com/test_paydirect/services/TransactionQueryWs.asmx?op=getTransactionData |
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| 35 | """ |
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| 36 | if https: |
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| 37 | h = httplib.HTTPSConnection(host) |
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| 38 | else: |
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| 39 | h = httplib.HTTPConnection(host) |
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| 40 | headers={ |
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| 41 | 'Host':host, |
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| 42 | 'Content-Type':'text/xml; charset=utf-8', |
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| 43 | 'Content-Length':len(xml), |
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| 44 | 'SOAPAction':'"%s"' % soap_action, |
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| 45 | } |
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| 46 | h.request('POST', url, body=xml,headers=headers) |
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| 47 | response = h.getresponse() |
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| 48 | return response |
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| 49 | |
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| 50 | |
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| 51 | def get_SOAP_response(product_id, transref, host, url, https): |
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| 52 | xml="""\ |
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| 53 | <?xml version="1.0" encoding="utf-8"?> |
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| 54 | <soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> |
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| 55 | <soap:Body> |
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| 56 | <getTransactionData xmlns="http://tempuri.org/"> |
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| 57 | <product_id>%s</product_id> |
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| 58 | <trans_ref>%s</trans_ref> |
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| 59 | </getTransactionData> |
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| 60 | </soap:Body> |
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| 61 | </soap:Envelope>""" % (product_id, transref) |
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| 62 | response=SOAP_post("http://tempuri.org/getTransactionData",xml, host, url, https) |
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| 63 | if response.status!=200: |
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| 64 | return 'Connection error (%s, %s)' % (response.status, response.reason) |
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| 65 | result_xml = response.read() |
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| 66 | doc=parseString(result_xml) |
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| 67 | response=doc.getElementsByTagName('getTransactionDataResult')[0].firstChild.data |
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| 68 | return response |
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| 69 | |
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| 70 | |
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| 71 | def get_JSON_response(product_id, transref, host, url, https, mac, amount): |
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| 72 | hashargs = product_id + transref + mac |
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| 73 | hashvalue = hashlib.sha512(hashargs).hexdigest() |
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| 74 | headers={ |
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| 75 | 'Content-Type':'text/xml; charset=utf-8', |
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| 76 | 'Hash':hashvalue, |
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| 77 | } |
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| 78 | if https: |
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| 79 | h = httplib.HTTPSConnection(host) |
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| 80 | else: |
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| 81 | h = httplib.HTTPConnection(host) |
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| 82 | amount = int(100 * amount) |
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| 83 | args = {'productid': product_id, |
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| 84 | 'transactionreference': transref, |
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| 85 | 'amount': amount} |
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| 86 | url = '%s?' % url + urlencode(args) |
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| 87 | h.request("GET", url, headers=headers) |
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| 88 | response = h.getresponse() |
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| 89 | if response.status!=200: |
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| 90 | return {'error': 'Connection error (%s, %s)' % (response.status, response.reason)} |
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| 91 | jsonout = response.read() |
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| 92 | parsed_json = json.loads(jsonout) |
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| 93 | return parsed_json |
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| 94 | |
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| 95 | def query_interswitch_SOAP(payment, product_id, host, url, https, verify): |
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| 96 | sr = get_SOAP_response(product_id, payment.p_id, host, url, https) |
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| 97 | if sr.startswith('Connection error'): |
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| 98 | msg = _('Connection error') |
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| 99 | log = sr |
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| 100 | return False, msg, log |
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| 101 | wlist = sr.split(':') |
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| 102 | if len(wlist) != 7: |
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| 103 | msg = _('Invalid callback: ${a}', mapping = {'a': sr}) |
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| 104 | log = 'invalid callback for payment %s: %s' % (payment.p_id, sr) |
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| 105 | return False, msg, log |
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| 106 | if verify and jr['ResponseCode'] == '20050': |
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| 107 | msg = _('Integration method has changed.') |
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| 108 | log = 'invalid callback for payment %s: %s' % (payment.p_id, sr) |
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| 109 | return False, msg, log |
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| 110 | payment.r_code = wlist[0] |
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| 111 | payment.r_desc = wlist[1] |
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| 112 | payment.r_amount_approved = float(wlist[2]) / 100 |
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| 113 | payment.r_card_num = wlist[3] |
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| 114 | payment.r_pay_reference = wlist[5] |
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| 115 | payment.r_company = u'interswitch' |
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| 116 | if payment.r_code != '00': |
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| 117 | msg = _('Unsuccessful callback: ${a}', mapping = {'a': sr}) |
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| 118 | log = 'unsuccessful callback for %s payment %s: %s' % ( |
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| 119 | payment.p_category, payment.p_id, sr) |
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| 120 | payment.p_state = 'failed' |
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| 121 | notify(grok.ObjectModifiedEvent(payment)) |
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| 122 | return False, msg, log |
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| 123 | if round(payment.r_amount_approved, 2) != round(payment.amount_auth, 2): |
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| 124 | msg = _('Callback amount does not match.') |
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| 125 | log = 'wrong callback for %s payment %s: %s' % ( |
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| 126 | payment.p_category, payment.p_id, sr) |
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| 127 | payment.p_state = 'failed' |
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| 128 | notify(grok.ObjectModifiedEvent(payment)) |
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| 129 | return False, msg, log |
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| 130 | if wlist[4] != payment.p_id: |
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| 131 | msg = _('Callback transaction id does not match.') |
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| 132 | log = 'wrong callback for %s payment %s: %s' % ( |
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| 133 | payment.p_category, payment.p_id, sr) |
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| 134 | payment.p_state = 'failed' |
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| 135 | notify(grok.ObjectModifiedEvent(payment)) |
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| 136 | return False, msg, log |
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| 137 | payment.p_state = 'paid' |
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| 138 | if not verify: |
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| 139 | payment.payment_date = datetime.utcnow() |
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| 140 | msg = _('Successful callback received.') |
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| 141 | log = 'valid callback for %s payment %s: %s' % ( |
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| 142 | payment.p_category, payment.p_id, sr) |
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| 143 | notify(grok.ObjectModifiedEvent(payment)) |
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| 144 | return True, msg, log |
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| 145 | |
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| 146 | def query_interswitch(payment, product_id, host, url, https, mac, verify): |
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| 147 | # If no mac mac key is given, fall back to deprecated SOAP method |
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| 148 | # (Uniben, AAUA, FCEOkene). |
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| 149 | if mac == None: |
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| 150 | return query_interswitch_SOAP( |
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| 151 | payment, product_id, host, url, https, verify) |
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| 152 | jr = get_JSON_response(product_id, payment.p_id, host, url, |
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| 153 | https, mac, payment.amount_auth) |
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| 154 | error = jr.get('error') |
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| 155 | if error: |
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| 156 | msg = log = error |
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| 157 | return False, msg, log |
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| 158 | |
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| 159 | # A typical JSON response |
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| 160 | # {u'SplitAccounts': [], |
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| 161 | # u'MerchantReference':u'p4210665523377', |
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| 162 | # u'PaymentReference':u'GTB|WEB|KPOLY|12-01-2015|013138', |
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| 163 | # u'TransactionDate':u'2015-01-12T13:43:39.27', |
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| 164 | # u'RetrievalReferenceNumber':u'000170548791', |
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| 165 | # u'ResponseDescription': u'Approved Successful', |
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| 166 | # u'Amount': 2940000, |
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| 167 | # u'CardNumber': u'2507', |
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| 168 | # u'ResponseCode': u'00', |
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| 169 | # u'LeadBankCbnCode': None, |
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| 170 | # u'LeadBankName': None} |
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| 171 | |
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| 172 | if len(jr) != 11: |
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| 173 | msg = _('Invalid callback: ${a}', mapping = {'a': str(jr)}) |
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| 174 | log = 'invalid callback for payment %s: %s' % (payment.p_id, str(jr)) |
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| 175 | return False, msg, log |
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| 176 | if verify and jr['ResponseCode'] == '20050': |
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| 177 | msg = _('Integration method has changed.') |
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| 178 | log = 'invalid callback for payment %s: %s' % (payment.p_id, str(jr)) |
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| 179 | return False, msg, log |
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| 180 | payment.r_code = jr['ResponseCode'] |
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| 181 | payment.r_desc = jr['ResponseDescription'] |
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| 182 | payment.r_amount_approved = jr['Amount'] / 100.0 |
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| 183 | payment.r_card_num = jr['CardNumber'] |
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| 184 | payment.r_pay_reference = jr['PaymentReference'] |
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| 185 | payment.r_company = u'interswitch' |
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| 186 | if payment.r_code != '00': |
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| 187 | msg = _('Unsuccessful callback: ${a}', mapping = {'a': payment.r_desc}) |
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| 188 | log = 'unsuccessful callback for %s payment %s: %s' % ( |
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| 189 | payment.p_category, payment.p_id, payment.r_desc) |
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| 190 | payment.p_state = 'failed' |
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| 191 | notify(grok.ObjectModifiedEvent(payment)) |
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| 192 | return False, msg, log |
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| 193 | if round(payment.r_amount_approved, 2) != round(payment.amount_auth, 2): |
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| 194 | msg = _('Callback amount does not match.') |
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| 195 | log = 'wrong callback for %s payment %s: %s' % ( |
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| 196 | payment.p_category, payment.p_id, str(jr)) |
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| 197 | payment.p_state = 'failed' |
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| 198 | notify(grok.ObjectModifiedEvent(payment)) |
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| 199 | return False, msg, log |
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| 200 | if jr['MerchantReference'] != payment.p_id: |
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| 201 | msg = _('Callback transaction id does not match.') |
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| 202 | log = 'wrong callback for %s payment %s: %s' % ( |
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| 203 | payment.p_category, payment.p_id, str(jr)) |
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| 204 | payment.p_state = 'failed' |
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| 205 | notify(grok.ObjectModifiedEvent(payment)) |
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| 206 | return False, msg, log |
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| 207 | payment.p_state = 'paid' |
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| 208 | if not verify: |
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| 209 | payment.payment_date = datetime.utcnow() |
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| 210 | msg = _('Successful callback received') |
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| 211 | log = 'valid callback for %s payment %s: %s' % ( |
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| 212 | payment.p_category, payment.p_id, str(jr)) |
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| 213 | notify(grok.ObjectModifiedEvent(payment)) |
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| 214 | return True, msg, log |
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| 215 | |
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| 216 | def write_payments_log(id, payment): |
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| 217 | payment.logger.info( |
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| 218 | '%s,%s,%s,%s,%s,%s,%s,%s,,,' % ( |
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| 219 | id, payment.p_id, payment.p_category, |
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| 220 | payment.amount_auth, payment.r_code, |
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| 221 | payment.provider_amt, payment.gateway_amt, |
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| 222 | payment.thirdparty_amt)) |
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