Python PayPalIPNForm.save方法代码示例

# 需要导入模块: from paypal.standard.ipn.forms import PayPalIPNForm [as 别名]
# 或者: from paypal.standard.ipn.forms.PayPalIPNForm import save [as 别名]
def ipn(request, item_check_callable=None):
    """
    PayPal IPN endpoint (notify_url).
    Used by both PayPal Payments Pro and Payments Standard to confirm transactions.
    http://tinyurl.com/d9vu9d
    
    PayPal IPN Simulator:
    https://developer.paypal.com/cgi-bin/devscr?cmd=_ipn-link-session
    """
    # TODO: Clean up code so that we don't need to set None here and have a lot
    #      of if checks just to determine if flag is set.
    flag = None
    ipn_obj = None
    
    # Clean up the data as PayPal sends some weird values such as "N/A"
    data = request.POST.copy()
    date_fields = ('time_created', 'payment_date', 'next_payment_date',
                   'subscr_date', 'subscr_effective')
    for date_field in date_fields:
        if data.get(date_field) == 'N/A':
            del data[date_field]

    form = PayPalIPNForm(data)
    if form.is_valid():
        try:
            # When commit = False, object is returned without saving to DB.
            ipn_obj = form.save(commit=False)
        except Exception, e:
            flag = "Exception while processing. (%s)" % e

# 需要导入模块: from paypal.standard.ipn.forms import PayPalIPNForm [as 别名]
# 或者: from paypal.standard.ipn.forms.PayPalIPNForm import save [as 别名]
def create_ipn(request):
    flag = None
    ipnObj = None
    form = PayPalIPNForm(request.POST)
    if form.is_valid():
        try:
            ipnObj = form.save(commit=False)
        except Exception as e:
            flag = "Exception while processing. (%s)" % e
    else:
        flag = "Invalid form. (%s)" % form.errors
    if ipnObj is None:
        ipnObj = PayPalIPN()
    ipnObj.initialize(request)
    if flag is not None:
        ipnObj.set_flag(flag)
    else:
        # Secrets should only be used over SSL.
        if request.is_secure() and 'secret' in request.GET:
            ipnObj.verify_secret(form, request.GET['secret'])
        else:
            donation = get_ipn_donation(ipnObj)
            if not donation:
                raise Exception('No donation associated with this IPN')
            verify_ipn_recipient_email(ipnObj, donation.event.paypalemail)
            ipnObj.verify(None)
    ipnObj.save()
    return ipnObj

# 需要导入模块: from paypal.standard.ipn.forms import PayPalIPNForm [as 别名]
# 或者: from paypal.standard.ipn.forms.PayPalIPNForm import save [as 别名]
def ipn(request, item_check_callable=None):
    """
    PayPal IPN endpoint (notify_url).
    Used by both PayPal Payments Pro and Payments Standard to confirm transactions.
    http://tinyurl.com/d9vu9d
    
    PayPal IPN Simulator:
    https://developer.paypal.com/cgi-bin/devscr?cmd=_ipn-link-session
    """
    flag = None
    ipn_obj = None
    
    # Clean up the data as PayPal sends some weird values such as "N/A"
    data = request.POST.copy()
    date_fields = ('time_created', 'payment_date', 'next_payment_date', 'subscr_date', 'subscr_effective')
    for date_field in date_fields:
        if data.get(date_field) == 'N/A':
            del data[date_field]

    form = PayPalIPNForm(data)
    if form.is_valid():
        try:
            ipn_obj = form.save(commit=False)
        except Exception, e:
            flag = "Exception while processing. (%s)" % e

# 需要导入模块: from paypal.standard.ipn.forms import PayPalIPNForm [as 别名]
# 或者: from paypal.standard.ipn.forms.PayPalIPNForm import save [as 别名]
def ipn(request, item_check_callable=None):
    """
    PayPal IPN endpoint (notify_url).
    Used by both PayPal Payments Pro and Payments Standard to confirm transactions.
    http://tinyurl.com/d9vu9d
    
    PayPal IPN Simulator:
    https://developer.paypal.com/cgi-bin/devscr?cmd=_ipn-link-session
    
    """    
    
    logging.info(request)
    
    form = PayPalIPNForm(request.POST)
    
    logging.info(form)
    logging.info(form.is_valid())
    
    if form.is_valid():
        try:
            ipn_obj = form.save(commit=False)
            logging.info(ipn_obj)
        except Exception, e:
            logging.error(e)
            ipn_obj = PayPalIPN()
            ipn_obj.set_flag("Exception while processing. (%s)" % form.errors)
            logging.info(ipn_obj)

# 需要导入模块: from paypal.standard.ipn.forms import PayPalIPNForm [as 别名]
# 或者: from paypal.standard.ipn.forms.PayPalIPNForm import save [as 别名]
def ipn(request, item_check_callable=None):
    """
    PayPal IPN endpoint (notify_url).
    Used by both PayPal Payments Pro and Payments Standard to confirm transactions.
    http://tinyurl.com/d9vu9d
    
    PayPal IPN Simulator:
    https://developer.paypal.com/cgi-bin/devscr?cmd=_ipn-link-session
    """
    #TODO: Clean up code so that we don't need to set None here and have a lot
    #      of if checks just to determine if flag is set.
    flag = None
    ipn_obj = None
    
    #set the encoding of the request, so that request.POST can be correctly decoded.
    #see https://github.com/johnboxall/django-paypal/issues/32
    #https://code.djangoproject.com/ticket/14035, worth noting, but this doesn't 
    # affect this ipn view as there won't be uploaded files.
    encoding = request.POST.get('charset', '')
    try:
        codecs.getdecoder(encoding) # check if the codec exists
        request.encoding = encoding
    except:
        pass

    # Clean up the data as PayPal sends some weird values such as "N/A"
    # Also, need to cope with custom encoding, which is stored in the body (!).
    # Assuming the tolerate parsing of QueryDict and an ASCII-like encoding,
    # such as windows-1252, latin1 or UTF8, the following will work:

    encoding = request.POST.get('charset', None)

    if encoding is None:
        flag = "Invalid form - no charset passed, can't decode"
        data = None
    else:
        try:
            data = QueryDict(request.body, encoding=encoding)
        except LookupError:
            data = None
            flag = "Invalid form - invalid charset"

    if data is not None:
        date_fields = ('time_created', 'payment_date', 'next_payment_date',
                       'subscr_date', 'subscr_effective')
        for date_field in date_fields:
            if data.get(date_field) == 'N/A':
                del data[date_field]

        form = PayPalIPNForm(data)
        if form.is_valid():
            try:
                #When commit = False, object is returned without saving to DB.
                ipn_obj = form.save(commit=False)
            except Exception, e:
                flag = "Exception while processing. (%s)" % e
        else:
            flag = "Invalid form. (%s)" % form.errors

# 需要导入模块: from paypal.standard.ipn.forms import PayPalIPNForm [as 别名]
# 或者: from paypal.standard.ipn.forms.PayPalIPNForm import save [as 别名]
def initialize_ipn_object(request):
  flag = None
  ipn_obj = None
  form = PayPalIPNForm(request.POST)
  if form.is_valid():
    try:
      ipn_obj = form.save(commit=False)
    except Exception, e:
      flag = "Exception while processing. (%s)" % e

# 需要导入模块: from paypal.standard.ipn.forms import PayPalIPNForm [as 别名]
# 或者: from paypal.standard.ipn.forms.PayPalIPNForm import save [as 别名]
def ipn(request, item_check_callable=None):
    """
    PayPal IPN endpoint (notify_url).
    Used by both PayPal Payments Pro and Payments Standard to confirm transactions.
    http://tinyurl.com/d9vu9d

    PayPal IPN Simulator:
    https://developer.paypal.com/cgi-bin/devscr?cmd=_ipn-link-session
    """
    #TODO: Clean up code so that we don't need to set None here and have a lot
    #      of if checks just to determine if flag is set.
    flag = None
    ipn_obj = None

    # Clean up the data as PayPal sends some weird values such as "N/A"
    data = request.POST.copy()
    date_fields = ('time_created', 'payment_date', 'next_payment_date',
                   'subscr_date', 'subscr_effective')
    for date_field in date_fields:
        if data.get(date_field) == 'N/A':
            del data[date_field]

    form = PayPalIPNForm(data)
    if form.is_valid():
        try:
            #When commit = False, object is returned without saving to DB.
            ipn_obj = form.save(commit = False)
        except Exception as e:
            flag = "Exception while processing. (%s)" % e
    else:
        flag = "Invalid form. (%s)" % form.errors

    if ipn_obj is None:
        ipn_obj = PayPalIPN()

    #Set query params and sender's IP address
    ipn_obj.initialize(request)

    if flag is not None:
        #We save errors in the flag field
        ipn_obj.set_flag(flag)
    else:
        # Secrets should only be used over SSL.
        if request.is_secure() and 'secret' in request.GET:
            ipn_obj.verify_secret(form, request.GET['secret'])
        else:
            ipn_obj.verify(item_check_callable)

    ipn_obj.save()
    return HttpResponse("OKAY")

# 需要导入模块: from paypal.standard.ipn.forms import PayPalIPNForm [as 别名]
# 或者: from paypal.standard.ipn.forms.PayPalIPNForm import save [as 别名]
def ipn(request, item_check_callable=None):
    """
    PayPal IPN endpoint (notify_url).
    Used by both PayPal Payments Pro and Payments Standard to confirm transactions.
    http://tinyurl.com/d9vu9d
    
    PayPal IPN Simulator:
    https://developer.paypal.com/cgi-bin/devscr?cmd=_ipn-link-session
    """
    #TODO: Clean up code so that we don't need to set None here and have a lot
    #      of if checks just to determine if flag is set.
    flag = None
    ipn_obj = None

    # Also, need to cope with custom encoding, which is stored in the body (!).
    # Assuming the tolerate parsing of QueryDict and an ASCII-like encoding,
    # such as windows-1252, latin1 or UTF8, the following will work:

    encoding = request.POST.get('charset', None)

    if encoding is None:
        flag = "Invalid form - no charset passed, can't decode"
        data = None
    else:
        try:
            data = QueryDict(request.raw_post_data, encoding=encoding).dict()
        except LookupError:
            data = None
            flag = "Invalid form - invalid charset"

    if data is not None:
        date_fields = ('time_created', 'payment_date', 'next_payment_date',
                       'subscr_date', 'subscr_effective')
        for date_field in date_fields:
            if data.get(date_field) == 'N/A':
                data[date_field] = None
                del data[date_field]

        form = PayPalIPNForm(data)
        if form.is_valid():
            try:
                #When commit = False, object is returned without saving to DB.
                ipn_obj = form.save(commit = False)
            except Exception, e:
                flag = "Exception while processing. (%s)" % e
        else:
            flag = "Invalid form. (%s)" % form.errors

# 需要导入模块: from paypal.standard.ipn.forms import PayPalIPNForm [as 别名]
# 或者: from paypal.standard.ipn.forms.PayPalIPNForm import save [as 别名]
def ipn(request, item_check_callable=None):
    """
    PayPal IPN endpoint (notify_url).
    Used by both PayPal Payments Pro and Payments Standard to confirm transactions.
    http://tinyurl.com/d9vu9d
    
    PayPal IPN Simulator:
    https://developer.paypal.com/cgi-bin/devscr?cmd=_ipn-link-session
    """

    params = request.POST
    invoice_id = params["invoice"]
    payer_email = params["payer_email"]

    payment_obj = Payment.objects.get(pk=int(invoice_id))
    payment_obj.paypal_txn_key = params["txn_id"]
    payment_obj.is_active = True
    payment_obj.save()

    photo = payment_obj.photo

    message = render_to_string("flickrpayments/photo_purchase_mail.txt", {"photo": photo})
    send_mail("Photo purchase order", message, "[email protected]", [payer_email])
    # from the paypal invoice get
    # payment obj (inovice number == payment obj pk)
    # get the buyer email

    # save the amount and paypal_txn_key to
    # payment object and activate the
    # payment obj

    # from payment obj get photo
    # mail the photo originla url to buyer

    flag = None
    ipn_obj = None
    form = PayPalIPNForm(request.POST)
    if form.is_valid():
        try:
            ipn_obj = form.save(commit=False)
        except Exception, e:
            flag = "Exception while processing. (%s)" % e

# 需要导入模块: from paypal.standard.ipn.forms import PayPalIPNForm [as 别名]
# 或者: from paypal.standard.ipn.forms.PayPalIPNForm import save [as 别名]
def ipn(request, item_check_callable=None):
    """
    PayPal IPN endpoint (notify_url).
    Used by both PayPal Payments Pro and Payments Standard to confirm transactions.
    http://tinyurl.com/d9vu9d
    
    PayPal IPN Simulator:
    https://developer.paypal.com/cgi-bin/devscr?cmd=_ipn-link-session
    """
    #TODO: Clean up code so that we don't need to set None here and have a lot
    #      of if checks just to determine if flag is set.
    flag = None
    ipn_obj = None
    
    #set the encoding of the request, so that request.POST can be correctly decoded.
    #see https://github.com/johnboxall/django-paypal/issues/32
    #https://code.djangoproject.com/ticket/14035, worth noting, but this doesn't 
    # affect this ipn view as there won't be uploaded files.
    encoding = request.POST.get('charset', '')
    try:
        codecs.getdecoder(encoding) # check if the codec exists
        request.encoding = encoding
    except:
        pass

    # Clean up the data as PayPal sends some weird values such as "N/A"
    data = request.POST.copy()
    date_fields = ('time_created', 'payment_date', 'next_payment_date',
                   'subscr_date', 'subscr_effective')
    for date_field in date_fields:
        if data.get(date_field) == 'N/A':
            del data[date_field]

    form = PayPalIPNForm(data)
    if form.is_valid():
        try:
            #When commit = False, object is returned without saving to DB.
            ipn_obj = form.save(commit = False)
        except Exception, e:
            flag = "Exception while processing. (%s)" % e

# 需要导入模块: from paypal.standard.ipn.forms import PayPalIPNForm [as 别名]
# 或者: from paypal.standard.ipn.forms.PayPalIPNForm import save [as 别名]
    def paypal_ipn(self) -> PayPalIPN or None:
        data = dict(
            txn_id=self.txn_id,
            buisness='square email',
            custom=self.custom,
            txn_type=self.TXN_TYPE,
            payment_gross=self.payment_gross,
            payment_status=self.payment_status,
            payment_type=self.payment_type,
            mc_currency=self.mc_currency,
            mc_fee=self.mc_fee,
            mc_gross=self.mc_gross,
            mc_handling=self.mc_handling,
            mc_shipping=self.mc_shipping,
            from_view='square',
        )

        ipn_form = PayPalIPNForm(
            data=data
        )

        if ipn_form.is_valid():
            ipn_form.clean()
            return ipn_form.save()

# 需要导入模块: from paypal.standard.ipn.forms import PayPalIPNForm [as 别名]
# 或者: from paypal.standard.ipn.forms.PayPalIPNForm import save [as 别名]
def ipn(request, item_check_callable=None):
    """
    PayPal IPN endpoint (notify_url).
    Used by both PayPal Payments Pro and Payments Standard to confirm transactions.
    http://tinyurl.com/d9vu9d

    PayPal IPN Simulator:
    https://developer.paypal.com/cgi-bin/devscr?cmd=_ipn-link-session
    """
    # TODO: Clean up code so that we don't need to set None here and have a lot
    #       of if checks just to determine if flag is set.
    flag = None
    ipn_obj = None

    # Clean up the data as PayPal sends some weird values such as "N/A"
    # Also, need to cope with custom encoding, which is stored in the body (!).
    # Assuming the tolerant parsing of QueryDict and an ASCII-like encoding,
    # such as windows-1252, latin1 or UTF8, the following will work:
    encoding = request.POST.get('charset', None)

    encoding_missing = encoding is None
    if encoding_missing:
        encoding = DEFAULT_ENCODING

    try:
        data = QueryDict(request.body, encoding=encoding).copy()
    except LookupError:
        data = None
        flag = "Invalid form - invalid charset"

    if data is not None:
        if hasattr(PayPalIPN._meta, 'get_fields'):
            date_fields = [f.attname for f in PayPalIPN._meta.get_fields() if f.__class__.__name__ == 'DateTimeField']
        else:
            date_fields = [f.attname for f, m in PayPalIPN._meta.get_fields_with_model()
                           if f.__class__.__name__ == 'DateTimeField']

        for date_field in date_fields:
            if data.get(date_field) == 'N/A':
                del data[date_field]

        form = PayPalIPNForm(data)
        if form.is_valid():
            try:
                # When commit = False, object is returned without saving to DB.
                ipn_obj = form.save(commit=False)
            except Exception as e:
                flag = "Exception while processing. (%s)" % e
        else:
            formatted_form_errors = ["{0}: {1}".format(k, ", ".join(v)) for k, v in form.errors.items()]
            flag = "Invalid form. ({0})".format(", ".join(formatted_form_errors))

    if ipn_obj is None:
        ipn_obj = PayPalIPN()

    # Set query params and sender's IP address
    ipn_obj.initialize(request)

    if flag is not None:
        # We save errors in the flag field
        ipn_obj.set_flag(flag)
    else:
        # Secrets should only be used over SSL.
        if request.is_secure() and 'secret' in request.GET:
            ipn_obj.verify_secret(form, request.GET['secret'])
        else:
            ipn_obj.verify(item_check_callable)

    ipn_obj.save()
    ipn_obj.send_signals()

    if encoding_missing:
        # Wait until we have an ID to log warning
        log.warning("No charset passed with PayPalIPN: %s. Guessing %s", ipn_obj.id, encoding)

    return HttpResponse("OKAY")

# 需要导入模块: from paypal.standard.ipn.forms import PayPalIPNForm [as 别名]
# 或者: from paypal.standard.ipn.forms.PayPalIPNForm import save [as 别名]
def ipn(request, item_check_callable=None):
    """
    PayPal IPN endpoint (notify_url).
    Used by both PayPal Payments Pro and Payments Standard to confirm transactions.
    http://tinyurl.com/d9vu9d
    
    PayPal IPN Simulator:
    https://developer.paypal.com/cgi-bin/devscr?cmd=_ipn-link-session
    """
    #TODO: Clean up code so that we don't need to set None here and have a lot
    #      of if checks just to determine if flag is set.
    flag = None
    ipn_obj = None

    # Clean up the data as PayPal sends some weird values such as "N/A"
    # Also, need to cope with custom encoding, which is stored in the body (!).
    # Assuming the tolerate parsing of QueryDict and an ASCII-like encoding,
    # such as windows-1252, latin1 or UTF8, the following will work:

    encoding = request.POST.get('charset', None)

    if encoding is None:
        flag = "Invalid form - no charset passed, can't decode"
        data = None
    else:
        try:
            data = QueryDict(request.body, encoding=encoding).copy()
        except LookupError:
            data = None
            flag = "Invalid form - invalid charset"

    if data is not None:
        date_fields = ('time_created', 'payment_date', 'next_payment_date',
                       'subscr_date', 'subscr_effective')
        for date_field in date_fields:
            if data.get(date_field) == 'N/A':
                del data[date_field]

        form = PayPalIPNForm(data)
        if form.is_valid():
            try:
                #When commit = False, object is returned without saving to DB.
                ipn_obj = form.save(commit=False)
            except Exception as e:
                flag = "Exception while processing. (%s)" % e
        else:
            flag = "Invalid form. (%s)" % form.errors

    if ipn_obj is None:
        ipn_obj = PayPalIPN()

    #Set query params and sender's IP address
    ipn_obj.initialize(request)

    if flag is not None:
        #We save errors in the flag field
        ipn_obj.set_flag(flag)
    else:
        # Secrets should only be used over SSL.
        if request.is_secure() and 'secret' in request.GET:
            ipn_obj.verify_secret(form, request.GET['secret'])
        else:
            ipn_obj.verify(item_check_callable)

    ipn_obj.save()
    return HttpResponse("OKAY")

# 需要导入模块: from paypal.standard.ipn.forms import PayPalIPNForm [as 别名]
# 或者: from paypal.standard.ipn.forms.PayPalIPNForm import save [as 别名]
def ipn(request, item_check_callable=None):
    """
    PayPal IPN endpoint (notify_url).
    Used by both PayPal Payments Pro and Payments Standard to confirm transactions.
    http://tinyurl.com/d9vu9d
    
    PayPal IPN Simulator:
    https://developer.paypal.com/cgi-bin/devscr?cmd=_ipn-link-session
    """
    #TODO: Clean up code so that we don't need to set None here and have a lot
    #      of if checks just to determine if flag is set.
    flag = None
    ipn_obj = None
    # Clean up the data as PayPal sends some weird values such as "N/A"
    data = request.POST.copy()
    date_fields = ('time_created', 'payment_date', 'next_payment_date',
                   'subscr_date', 'subscr_effective')
    for date_field in date_fields:
        if data.get(date_field) == 'N/A':
            del data[date_field]

    data['payer_id'] = int(data['custom'])
      
    if data.get('txn_type') in ['web_accept','cart']:
        user = User.objects.get(pk=data['custom'])
        user.first_name = data['first_name']
        user.last_name = data['last_name']
        user.save()

    if data.get('txn_type') == 'web_accept':
        accessRecord = Access(user=user,lecture=Lecture.objects.get(pk=data['item_number']), 
            activation_date=datetime.now(pytz.utc),active=True)
        accessRecord.save()
        touch_user.send_robust(sender=data)

    elif data.get('txn_type') == 'cart':
        xname = []
        xnumber = []
        for x in xrange(int(data['num_cart_items'])):
            name = 'item_name' + str(x+1)
            xname.append(data[name])
            number = 'item_number' + str(x+1)
            xnumber.append(data[number])
            accessRecord = Access(user=User.objects.get(pk=data['custom']),lecture=Lecture.objects.get(pk=data[number]),activation_date=datetime.now(pytz.utc),active=True)
            accessRecord.save()
        data['item_name'] = ", ".join(xname)[:125]
        data['item_number'] = ", ".join(xnumber)
    
    elif data.get('txn_type') in ['subscr_signup']:
        license_user.send_robust(sender=data)

    elif data.get('txn_type') in ['subscr_payment']:
        pass
        
    form = PayPalIPNForm(data)
    if form.is_valid():
        try:
            #When commit = False, object is returned without saving to DB.
            ipn_obj = form.save(commit = False)
        except Exception, e:
            flag = "Exception while processing. (%s)" % e

# 需要导入模块: from paypal.standard.ipn.forms import PayPalIPNForm [as 别名]
# 或者: from paypal.standard.ipn.forms.PayPalIPNForm import save [as 别名]
def ipn(request, item_check_callable=None):
    
    """
    The response from Paypal Payment
    
    {u'protection_eligibility': [u'Eligible'],
    u'last_name': [u'R'], 
    u'txn_id': [u'1B883441C5191701K'], 
    u'receiver_email': [u'[email protected]'],
    u'payment_status': [u'Completed'],
    u'payment_gross': [u'100.00'],
    u'tax': [u'0.00'], 
    u'residence_country': [u'US'], 
    u'invoice': [u'1461'],
    u'address_state': [u'CA'],
    u'payer_status': [u'verified'],
    u'txn_type': [u'web_accept'],
    u'address_country': [u'United States'],
    u'handling_amount': [u'0.00'], 
    u'payment_date': [u'01:23:03 Jul 04, 2014 PDT'], 
    u'first_name': [u'XXXXXXXXX'], u'item_name': [u''],
    u'address_street': [u'1 Main St'], 
    u'charset': [u'windows-1252'], 
    u'custom': [u''],
    u'notify_version': [u'3.8'],
    u'address_name': [u'XXXXXXXXX'], 
    u'test_ipn': [u'1'],
    u'item_number': [u''], 
    u'receiver_id': [u'7EEGW6KXU7H3G'],
    u'transaction_subject': [u''], 
    u'business': [u'[email protected]'], 
    u'payer_id': [u'YQG53MRMSMVT8'],
    u'verify_sign': [u'AMIsJErLWFh1ByQ-Pn.oseCWp0SBAOA1.0fCwFL.qfIIq6GQoS36n5i8'],
    u'address_zip': [u'95131'], 
    u'payment_fee': [u'3.20'], 
    u'address_country_code': [u'US'],
    u'address_city': [u'San Jose'],
    u'address_status': [u'confirmed'], 
    u'mc_fee': [u'3.20'],
    u'mc_currency': [u'USD'],
    u'shipping': [u'0.00'], 
    u'payer_email': [u'[email protected]'],
    u'payment_type': [u'instant'],
    u'mc_gross': [u'100.00'], 
    u'ipn_track_id': [u'59b0e84327236'],
    u'quantity': [u'1']
    }

    """
    
    """
    PayPal IPN endpoint (notify_url).
    Used by both PayPal Payments Pro and Payments Standard to confirm transactions.
    http://tinyurl.com/d9vu9d
    
    PayPal IPN Simulator:
    https://developer.paypal.com/cgi-bin/devscr?cmd=_ipn-link-session
    """
    #TODO: Clean up code so that we don't need to set None here and have a lot
    #      of if checks just to determine if flag is set.
    flag = None
    ipn_obj = None

    # Clean up the data as PayPal sends some weird values such as "N/A"
    # Also, need to cope with custom encoding, which is stored in the body (!).
    # Assuming the tolerate parsing of QueryDict and an ASCII-like encoding,
    # such as windows-1252, latin1 or UTF8, the following will work:

    encoding = request.POST.get('charset', None)

    if encoding is None:
        flag = "Invalid form - no charset passed, can't decode"
        data = None
    else:
        try:
            data = QueryDict(request.body, encoding=encoding).copy()
        except LookupError:
            data = None
            flag = "Invalid form - invalid charset"

    if data is not None:
        date_fields = ('time_created', 'payment_date', 'next_payment_date',
                       'subscr_date', 'subscr_effective')
        for date_field in date_fields:
            if data.get(date_field) == 'N/A':
                del data[date_field]

        form = PayPalIPNForm(data)
        if form.is_valid():
            try:
                #When commit = False, object is returned without saving to DB.
                ipn_obj = form.save(commit=False)
            except Exception as e:
                flag = "Exception while processing. (%s)" % e
        else:
            flag = "Invalid form. (%s)" % form.errors

    if ipn_obj is None:
        ipn_obj = PayPalIPN()

#.........这里部分代码省略.........