Python 支付寶支付代碼

#!/usr/bin/env python
# encoding: utf-8
'''
Created on 2011-1-5
@author: codeback@gmail.com
'''
import hashlib
import urllib2

verfyURL={
    "https":"https://www.alipay.com/cooperate/gateway.do?service=notify_verify",
    "http" :"http://notify.alipay.com/trade/notify_query.do?",
    }
gateway="https://www.alipay.com/cooperate/gateway.do"

class alipay:
    def __init__(self,
                 partner="您的淘寶身份",
                 key="您的淘寶Key",
                 sellermail="賣家郵箱",
                 notifyurl="異步通知回調URL",
                 returnurl="跳轉回調URL",
                 showurl="產品頁面"):
            
            self.key=key;
            self.conf={
              'partner'         :   partner,
              'service'         :   "create_direct_pay_by_user",
              'payment_type'    :   "1",
              'seller_email'    :   sellermail,
              'notify_url'      :   notifyurl,
              'return_url'      :   returnurl,
              'show_url'        :   showurl,
              '_input_charset'  :   "UTF-8",
              'sign_type'       :   "MD5",
              #其餘參數，若是有默認值定義在下面：
              'paymethod'       :   "",
              'mainname'        :   "",
              }

    def populateURLStr(self,params):
        ks=params.keys()
        ks.sort()
        rlt=''
        for k in ks:
            if params[k]==None or len(params[k])==0 \
                or k=="sign" or k=="sign_type" or k=="key":
                continue
            rlt=rlt+"&%s=%s"%(k,params[k])
        print "URL:"+rlt[1:]
        return rlt[1:]
        

    def buildSign(self,params):
        sign=hashlib.md5(self.populateURLStr(params)+self.key).hexdigest()
        print "md5 sign is %s" % sign;
        return sign
    
    
    '''
      校驗支付寶返回的參數，交易成功的通知回調.
      校驗分爲兩個步驟：檢查簽名是否正確、訪問支付寶確認當前數據是由支付寶返回。
      
      params爲支付寶傳回的數據。
    '''
    def notifiyCall(self,params,verify=True,transport="http"):
        sign=None
        if params.has_key('sign'):
            sign=params['sign']
        locSign=self.buildSign(params)
        
        if sign==None or locSign!=sign:
            print "sign error."
            return "fail"
        
        if params['trade_status']!='TRADE_FINISHED' and  params['trade_status']!='TRADE_SUCCESS':
            return "fail"
        
        if not verify:
            return "success"
        else:
            print "Verify the request is call by alipay.com...."
            url = verfyURL[transport] + "&partner=%s&notify_id=%s"%(self.conf['partner'],params['notify_id'])
            response=urllib2.urlopen(url)
            html=response.read()
       
            print "aliypay.com return: %s" % html
            if html=='true':
                return "success"
            
            return "fail"

    '''
        生成提交到支付寶的表單，用戶經過此表單將訂單信息提交到支付寶。
        
        由params參數提供訂單信息，必須包含如下幾項內容：
        out_trade_no：訂單號
        subject     :訂單名稱、或商品名稱
        body        :訂單備註、描述
        total_fee   :總額
    '''
    def createPayForm(self,params,method="POST",title="確認，支付寶付款"):
        params.update(self.conf)
        sign=self.buildSign(params)
        params['sign']=sign
        
        ele=""
        for nm in params:
           
            print "key in params : %s"%nm
            
            if params[nm]==None or len(params[nm])==0 or nm=='_input_charset':
                continue
            ele = ele + " <input type='hidden' name='%s' value='%s' />" % (nm,params[nm])
        html='''
            <form name='alipaysubmit' action='%s?_input_charset=%s' method='%s' target='_blank'>
                %s
                <input type="submit" value="%s" />
            </form>
            ''' % (gateway,params['_input_charset'],method,ele,title)
            
        return html