对于目前众多的验证码解决方案来说，这个API有着中国电信这个重量级的运营商为靠山，应该是比较靠谱的了，而且还是免费的。详细情况请参阅：http://open.189.cn

使用方式：
#定义app_id和app_secret
r = RandCode(\’app_id\’, \’app_secret\’)
#支持平台的两种接口方式
#方式1：自定义接收验证码的回调URL
r.send(\’phone number\’, \’http://yourdomain/rand_code.php\’, \’3\’)
#方式2：自定义验证码内容
r.send_sms(\’phone number\’, 189189)

复制代码 代码如下:
#!/usr/bin/env python
# coding: utf-8

from time import strftime, localtime
import urllib, urllib2, json
import hmac, hashlib

class RandCode(object):

 APP_ID = \’\’
 APP_SECRET = \’\’
 ACCESS_TOKEN = \’\’
 RANDCODE_TOKEN = \’\’
 TOKEN_API = \’https://oauth.api.189.cn/emp/oauth2/v2/access_token\’
 RANDCODE_TOKEN_API = \’http://api.189.cn/v2/dm/randcode/token\’
 RANDCODE_SEND_API = \’http://api.189.cn/v2/dm/randcode/send\’
 RANDCODE_SENDSMS_API = \’http://api.189.cn/v2/dm/randcode/sendSms\’

 def __init__(self, app_id=\’\’, app_secret=\’\’, access_token=\’\’):
  self.APP_ID = app_id or RandCode.APP_ID
  self.APP_SECRET = app_secret or RandCode.APP_SECRET
  self.ACCESS_TOKEN = access_token or self.__fetch_access_token()
  self.RANDCODE_TOKEN = self.__fetch_randcode_token()

 def send(self, phone, url, exp_time):
  result = False
  if self.ACCESS_TOKEN and self.RANDCODE_TOKEN:
   data = {
    \’app_id\’:self.APP_ID,
    \’access_token\’:self.ACCESS_TOKEN,
    \’token\’:self.RANDCODE_TOKEN,
    \’phone\’:phone,
    \’url\’:url,
    \’exp_time\’:exp_time,
    \’timestamp\’:self.__date_time(),
    }
   data = self.__build_request_string(data)
   data = self.__data_sign(data)
   if data:
    res = self.__request_data(\’post\’, data, self.RANDCODE_SEND_API)
    json_data = json.loads(res)
    if json_data[\’res_code\’] == 0:
     result = True
  return result

 def send_sms(self, phone, randcode, exp_time=\’2\’):
  result = False
  if self.ACCESS_TOKEN and self.RANDCODE_TOKEN:
   data = {
    \’app_id\’:self.APP_ID,
    \’access_token\’:self.ACCESS_TOKEN,
    \’token\’:self.RANDCODE_TOKEN,
    \’phone\’:phone,
    \’randcode\’:str(randcode),
    \’exp_time\’:exp_time,
    \’timestamp\’:self.__date_time(),
    }
   data = self.__build_request_string(data)
   data = self.__data_sign(data)
   if data:
    res = self.__request_data(\’post\’, data, self.RANDCODE_SENDSMS_API)
    json_data = json.loads(res)
    if json_data[\’res_code\’] == 0:
     result = True
  return result
  pass

 def __request_data(self, method, data, url):
  if isinstance(data, dict):
   data = urllib.urlencode(data)
  if method == \’post\’:
   req = urllib2.Request(url, data)
  else:
   url = \’%s?%s\’ % (url, data)
   req = urllib2.Request(url)
  return urllib2.urlopen(req).read()

 def __fetch_access_token(self):
  access_token = self.ACCESS_TOKEN
  if access_token == \’\’:
   data = {
    \’grant_type\’:\’client_credentials\’,
    \’app_id\’:self.APP_ID,
    \’app_secret\’:self.APP_SECRET,
    }
   res = self.__request_data(\’post\’, data, self.TOKEN_API)
   json_data = json.loads(res)
   if json_data[\’res_code\’] == \’0\’:
    access_token = json_data[\’access_token\’]
   else:
    raise ValueError(json_data[\’res_message\’])
  return access_token

 def __fetch_randcode_token(self):
  result = \’\’
  if self.ACCESS_TOKEN != \’\’:
   data = {
    \’app_id\’:self.APP_ID,
    \’access_token\’:self.ACCESS_TOKEN,
    \’timestamp\’:self.__date_time(),
    }
   data = self.__build_request_string(data)
   data = self.__data_sign(data)
   if data:
    res = self.__request_data(\’get\’, data, self.RANDCODE_TOKEN_API)
    json_data = json.loads(res)
    if json_data[\’res_code\’] == 0:
     result = json_data[\’token\’]
    else:
     raise ValueError(json_data[\’res_message\’])
  return result

 def __data_sign(self, data):
  result = \’\’
  if data:
   if isinstance(data, dict):
    data = self.__build_request_string(data)
    sign = hmac.new(self.APP_SECRET, urllib.urlencode(data), hashlib.sha1).digest()
   elif isinstance(data, unicode):
    sign = hmac.new(self.APP_SECRET, data, hashlib.sha1).digest()
   if data:
    result = \”%s&sign=%s\” % ( data, urllib.quote(sign.encode(\’base64\’).strip()) )
  return result

 def __build_request_string(self, dict):
  keys = dict.keys()
  keys.sort()
  return \’&\’.join([ key + \”=\” + dict[key] for key in keys ])

 def __date_time(self):
  return strftime(\”%Y-%m-%d %H:%M:%S\”, localtime())

if __name__  == \’__main__\’:
 r = RandCode(\’app_id\’, \’app_secret\’)
 r.send(\’phone number\’, \’http://yourdomain/rand_code.php\’, \’3\’)
 r.send_sms(\’phone number\’, 189189)