django - 如何处理paypal WPP的django-paypal中的returnurl

Question

我现在正在使用 Django 开发我的网站。在将我的站点与 paypal 集成时，我使用了可插入应用程序“http://github.com/johnboxall/django-paypal”。虽然文档对“Using PayPal Payments Pro (WPP)”说的很清楚，但我还是有一些疑问，尤其是“returnurl”和“confirm_template”之间的关系。

#views.py
from paypal.pro.views import PayPalPro

def buy_my_item(request):
   item = {"amt": "10.00",             # amount to charge for item
           "inv": "inventory",         # unique tracking variable paypal
           "custom": "tracking",       # custom tracking variable for you
           "cancelurl": "http://...",  # Express checkout cancel url
           "returnurl": "http://..."}  # Express checkout return url

   kw = {"item": item,                            # what you're selling
         "payment_template": "payment.html",      # template name for payment
         "confirm_template": "confirmation.html", # template name for confirmation
         "success_url": "/success/"}              # redirect location after success

   ppp = PayPalPro(**kw)
   return ppp(request)

当点击 Paypal 网站上的“继续”按钮时，它会将我重定向回“returnurl”。这是我的问题，我不知道如何处理这个 returnurl。在我看来，我还应该写一个函数让它渲染 confirmation.html。我对吗？如果可以，这个函数怎么写。非常感谢任何帮助和指示。

Answer 1

django-paypal 的文档不是很好.简短的回答是您的 returnurl 应该是指向您的方法 buy_my_item 的任何 URL。这里有一些例子取 self 在 IRL 工作的东西。请注意，我使用 PayPal 的“useraction=commit”选项来减少其快速结帐中的步骤数。

在你的 urls.py 中:

url(r'^pay-now/', views.pay_now, name='pay_now'),
url(r'^purchase-thanks/$', views.purchase_thanks, name='pay_success'),
url(r'^purchase-cancelled/$', views.purchase_thanks, name='pay_cancel'),

在你的 views.py 中:

""" User payment method endpoint for rendering and processing forms. """
@csrf_exempt
def pay_now( request ):
    # Override django-paypal library endpoints to include 'useraction=commit'
    # which changed PayPal's review page to be a 'pay now' page.
    # This is ugly but I didn't want to subclass.
    from paypal.pro import views as pro_views
    pro_views.EXPRESS_ENDPOINT = "https://www.paypal.com/webscr?cmd=_express-checkout&useraction=commit&%s"
    pro_views.SANDBOX_EXPRESS_ENDPOINT = "https://www.sandbox.paypal.com/webscr?cmd=_express-checkout&useraction=commit&%s"

    # ...because we use 'useraction=commit', there's no need to show the confirm page.
    # So let's change the request to show the confirmation form into a request to
    # approve it. It just so happens that the arguments are the same -- the difference
    # is between the GET and the POST.
    # <input type="hidden" name="token" value="EC-485941126E653491T" id="id_token"/>
    # <input type="hidden" name="PayerID" value="78W69D3FEVWJBC" id="id_PayerID"/>
    if request.method == 'GET' and 'token' in request.GET and 'PayerID' in request.GET:
        request.method = 'POST'
        request.POST = request.GET # Crudely convert GET to POST

    item = {
        'amt':           99.99, # Amount to charge for item
        'currencycode':  'usd',
        #'inv':           1, # Unique tracking variable paypal - must be a number.
        #'desc':          'Your product name', # Deprecated by PayPal, don't bother
                                               # (you'll get the name twice in your statement otherwise)
        'custom':        'custom1', # Custom tracking variable for you. Realistically you have to pass
                                    # this if you're specifying basket contents to PayPal as django-paypal
                                    # won't be given `item_name` in the IPN, only `item_name1` etc.
                                    # which it cannot interpret.
        'cancelurl':     'http://%s%s' % DYNAMIC_URL, reverse('pay_cancel')), # Express checkout cancel url
        'returnurl':     'http://%s%s' % (DYNAMIC_URL, reverse('pay_now')), # Express checkout return url
        'allownote':     0, # Disable "special instructions for seller"
        'l_name0':       'Your product name',
        #'l_number0':    1234,
        #'l_desc0':      'longer description',
        'l_amt0':        99.99,
        'l_qty0':        1,
        'itemamt':       99.99,
        #'taxamt':       0.00,
        #'shippingamt':  0.00,
        #'handlingamt':  0.00,
        #'shipdiscamt':  0.00,
        #'insuranceamt': 0.00,
    }

    kw = {
        'item': item,
        'payment_template': 'cms/register.html', # Template name for payment
        'confirm_template': 'cms/paypal-confirmation.html', # Template name for confirmation
        'success_url':      reverse('pay_success'), # Ultimate return URL
    }

    ppp = PayPalPro(**kw)
    return ppp(request)

您可能还有很多其他问题，例如“当我进入付款确认页面时，我如何区分 EC 付款和 WPP 付款？”，但我会在有人问您之前将其保存下来! django-paypal不错，但让它工作可能会非常令人沮丧，特别是当您想将附加值传递给模板时，并且文档(即使在我见过的 fork 上)也不是很好。

请注意，此示例指的是 HTTP 而不是 HTTPS URL。在生产中，使用 WPP，您几乎肯定会希望使用 HTTPS。此外，该产品的主要发行版已过时，您需要使用 @csrf_exempt 修补 IPN 端点以使其正常工作。