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python---自定义字段验证

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10/03
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各个字段类，含正则和验证方法

#字段类
class IPField:
REGULAR = "^(25[0-5]|2[0-4]\d|[0-1]?\d?\d)(\.(25[0-5]|2[0-4]\d|[0-1]?\d?\d)){3}" def __init__(self,error_dict=None,required=True):
self.error_dict={}
if error_dict:
self.error_dict.update(error_dict)
self.required=required
self.error=None
self.is_valid=False
self.value=None def validate(self,name,input_value):
if not self.required: #允许为空
if input_value.strip():
ret = re.match(IPField.REGULAR, input_value)
if ret:
self.is_valid = True
self.value = ret.group()
else:
if self.error_dict.get('valid', None):
self.error = self.error_dict['valid']
else:
self.error = "%s is invalid" % name
else:
self.is_valid = True
self.value=input_value
else: #不允许为空
if not input_value.strip():
if self.error_dict.get('required',None):
self.error=self.error_dict['required']
else:
self.error="%s is required"%name
else:
ret = re.match(IPField.REGULAR,input_value)
if ret:
self.is_valid=True
self.value=ret.group()
else:
if self.error_dict.get('valid',None):
self.error=self.error_dict['valid']
else:
self.error="%s is invalid"%name#可以含有多个文件名
class FileField:
REGULAR = "^(\w\.pdf)|(\w\.mp3)|(\w\.py)$" def __init__(self,error_dict=None,required=True):
self.error=None
self.success_file_name_list={}
self.value=None
self.is_valid=True#后面只要有一个错误，就是错
self.required=required
self.error_dict={}
if error_dict:
self.error_dict.update(error_dict) def validate(self,name,all_file_name_list):#all_file_name_list所有文件文件名
if not self.required:
# if not input_value.strip():
# ret=re.match(FileField.REGULAR,input_value)
# if ret:
# self.is_valid=True
# self.value=input_value
# else:
# if self.error_dict.get('valid',None):
# self.error=self.error_dict['valid']
# else:
# self.error="%s is invalid"%name
# else:
# self.is_valid=True
# self.value=input_value
if not all_file_name_list:
self.is_valid=True
else:
#循环匹配所有
for input_value in all_file_name_list:
ret = re.match(FileField.REGULAR, input_value)
if ret:
self.success_file_name_list.append(input_value)
else:
self.is_valid=False
if self.error_dict.get('valid', None):
self.error = self.error_dict['valid']
else:
self.error = "%s is invalid" % name
break
else:
if not all_file_name_list:
self.is_valid=False
if self.error_dict.get('required',None):
self.error=self.error_dict['required']
else:
self.error="%s is required"%name
else:
#循环匹配所有
for input_value in all_file_name_list:
ret = re.match(FileField.REGULAR, input_value)
if ret:
self.success_file_name_list.append(input_value)
else:
self.is_valid=False
if self.error_dict.get('valid', None):
self.error = self.error_dict['valid']
else:
self.error = "%s is invalid" % name
break#字符串验证
class StringField:
REGULAR = "(.*)" def __init__(self,error_dict=None,required=True):
self.is_valid=False
self.value=None
self.error=None
self.error_dict={}
if error_dict:
self.error_dict.update(error_dict)
self.required=required def validate(self,name,input_value):
if not self.required: #允许为空
if input_value.strip():
ret = re.match(StringField.REGULAR,input_value)
if ret:
self.is_valid=True
self.value=input_value
else:
if self.error_dict.get('valid',None):
self.error=self.error_dict['valid']
else:
self.error="%s is invalid"%name
else:
self.is_valid=True
self.value=input_value
else:#不允许为空
if not input_value.strip():
if self.error_dict.get('required',None):
self.error=self.error_dict['required']
else:
self.error="%s is required"%name
else:
ret=re.match(StringField,input_value)
if ret:
self.is_valid=True
self.value=input_value
else:
if self.error_dict.get('valid',None):
self.error=self.error_dict['valid']
else:
self.error="%s is invalid"%name#复选框验证
class CheckBoxField:
def __init__(self,required=True,error_dict=None):
self.is_valid=False
self.error=None
self.required=required
if error_dict:
self.error_dict=error_dict
self.value=None def validate(self,name,input_value):
#用户表单输入的数据可以为空
if not self.required:
self.is_valid=True
self.value=input_value
else:
if not input_value:
if self.error_dict.get('required',None):
self.error=self.error_dict['required']
else:
self.error="%s is required"%name
else:
self.is_valid=True
self.value=input_value

验证类基类

#form验证基类
class BaseForm(object): def check_valid(self,handler):
flag=True
error_message_dict={}
success_dict={}
for key,regular in self.__dict__.items():
#用户输入值
if type(regular) == CheckBoxField:
input_val=handler.get_arguments(key)
elif type(regular)==FileField:
#包含上传多个文件[{'body':'','filename':''},{'body':'','filename':''}]
file_list=handler.request.files.get(key)
#获取其中的文件名
input_val=[]
for item in file_list:
input_val.append(item['filename'])
else:
input_val=handler.get_argument(key) regular.validate(key,input_val)
if regular.is_valid:
success_dict[key]=regular.value
else:
flag=False
error_message_dict[key]=regular.error return flag,success_dict,error_message_dict

具体验证类子类：

#form验证类，采用对象
class HomeForm(BaseForm):
def __init__(self):
self.ip = IPField(required=True,error_dict={'required':'数据不为空',"valid":"验证出错"})
self.host=StringField(required=True,error_dict={'required':"主机名必须存在","valid":"这都会出错"})
self.sex=CheckBoxField(required=True,error_dict={'required':'复选框必须选择'})
# self.file=FileField(required=True,error_dict={'valid':'文件格式不正确'})

其他业务：

#采用HomeForm验证类
class HomeHandler(tornado.web.RequestHandler):
def get(self):
self.render('home.html',error_dict=None) def post(self, *args, **kwargs):
formCk = HomeForm()
is_valid,success_dict,error_dict=formCk.check_valid(self)
if is_valid:
print(success_dict)
self.write("ok")
else:
print(error_dict)
self.render('home.html',error_dict=error_dict)

settings={
'static_path':'statics',
'template_path':'views',
}application=tornado.web.Application([
(r"/index",IndexHandler),
(r"/home",HomeHandler),
],**settings)if __name__ == "__main__":
application.listen()
tornado.ioloop.IOLoop.instance().start()

前端代码：

<form method="post" action="/home">
<input type="text" placeholder="主机" name="host"/>
<input type="text" placeholder="IP" name="ip">
<input type="checkbox" name="sex" value=""/>男
<input type="checkbox" name="sex" value=""/>女
<input type="file" name="file">
<input type="file" name="file">
<span>
{% if error_dict and 'ip' in error_dict %}
{{error_dict['ip']}}
{% end %}
{% if error_dict and 'host' in error_dict %}
{{error_dict['host']}}
{% end %}
</span>
<input type="submit" value="提交"/>
</form>