我正在尝试使用Python在Google App Engine中编写我的第一个应用程序（该应用程序的链接：http://contractpy.appspot.com/ - 它只是一个实验性应用程序）。整个代码如下。
但是，当我提交数据时，我收到此错误（显示在日志中）：
(...) line 265, in get "contractType":geted_contractType
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 949: ordinal not in range(128)
第265行在if块中：
self.response.out.write(yourcontract % {"resident":geted_resident_name,
"nacionality":geted_user_nacionality,
"SSN":geted_user_SSN,
"SSN_error":geted_SSN_error,
"driverLicense":geted_user_driverLicense,
"email":geted_user_email,
"witness ":geted_witness ,
"owner":geted_owner,
"contractType":geted_contractType
})
我尝试进行更改，阅读类似的awnswers（例如this或this），但没有任何帮助。我无法弄清楚这段代码出了什么问题。有人能弄清楚导致这种错误的原因以及如何修复它吗？
我正在使用Python 2.7。
提前感谢您的帮助！
# -*- coding: utf-8 -*-
# -*- coding: utf-8 -*-
#!/usr/bin/env python
#
# Copyright 2007 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import webapp2
form = """
<html>
<head>
<title>Contract with Python</title>
<style type="text/css">
.label {text-align: right}
.error {color: red}
</style>
</head>
<body>
<h2>Contract with Python</h2>
<form method="post">
<table>
<tr>
<td class="label">
resident
</td>
<td>
<input type="text" name="resident" value= "%(resident)s">
</td>
<td class="error"> %(resident_error)s
</td>
</tr>
<tr>
<td class="label">
nacionality
</td>
<td>
<input type="text" name="nacionality" value= " ">
</td>
</tr>
<tr>
<td class="label">
License
</td>
<td>
<input type="text" name="driverLicense" value="">
</td>
</tr>
<tr>
<td class="label">
SSN
</td>
<td>
<input type="text" name="SSN" value="%(SSN)s">
</td>
<td class="error"> %(SSN_error)s
</td>
</tr>
<tr>
<td class="label">
Email (optional)
</td>
<td>
<input type="text" name="email" value="%(email)s">
</td>
<td class="error"> %(email_error)s
</td>
</tr>
</table>
<br>
<td class="label">
Contract Type
<select name = "contractType">
<option>House Rental Contract</option>
<option>Car Rental Contract</option>
<option>Other</option>
</select>
</td>
<br>
<br>
<br>
owner
<select name = "owner">
<option>House owner</option>
<option>Car owner</option>
<option>Other owner</option>
</select>
<br>
<br>
<br>
Witness
<select name = "witness">
<option>Carl Sagan</option>
<option>Mahatma Gandhi</option>
</select>
<br>
<br>
<input type="submit">
</form>
</body>
</html>
"""
yourcontract = """
<html>
<head>
<title>Unit 2 Signup</title>
</head>
<body>
%(contractType)s
In consideration of the agreements of the Resident(s), known as: %(resident)s The owner hereby rents them the dwelling located at %(residentAdress)s, for the period commencing on the %(dateStarts)s, and monthly thereafter until the last day of %(dateEnds)s, at which time this Agreement is terminated. Resident(s), in consideration of owners permitting them to occupy the above property, hereby agrees to the following terms:
RENT: To pay as rental the sum of $ (rentalSum) per month, due and payable in advance from the first day of every month. Failure to pay rent when due will result in the owner taking immediate legal action to evict the Resident from the premises and seize the security deposit.
LATE FEE: Rent received after the first of the month will be subject to a late fee of 10% plus (3.00) dollars per day.
ACCEPTED THIS (dateContract), at (localContract).
___________________________________________________
%(resident)s - Resident
___________________________________________________
%(owner)s – owner
___________________________________________________
%(witness)s – Witness
</body>
</html>
"""
import re
USER_RE = re.compile(r"^[a-zA-Z0-9_-]{3,20}$")
def valid_resident(resident):
return USER_RE.match(resident)
PASS_RE = re.compile(r"^.{3,20}$")
def valid_SSN(SSN):
return PASS_RE.match(SSN)
EMAIL_RE = re.compile(r"^[\S]+@[\S]+\.[\S]+$")
def valid_email(email):
return EMAIL_RE.match(email)
def escape_html(s):
for (i,o) in (("&","&"), (">",">"), ("<","<"), ('"','"')):
s = s.replace(i,o)
return s
import time
import datetime
def dateToday():
today = datetime.datetime.today()
todayDay = str(today.day)
todayMonth = str(today.month)
monthExt = {'1':' January ', '2':'February', '3':' March ', '4':'April', '5':'May', '6':'June', '7 ':' July ', '8':'August', '9':'September', '10':'October', '11':'November ', '12':'December'}
todayYear = str(today.year)
return(todayDay + ' of ' + monthExtenso[todaymonth] + ' of ' + todayYear)
class MainHandler(webapp2.RequestHandler):
def get(self):
self.response.out.write(form %{"resident": "",
"SSN": "",
"driverLicense": "",
"email":"",
"resident_error": "",
"SSN_error": "",
"driverLicense_error": "",
"email_error": ""})
def write_form(self, text_write):
self.response.out.write(text_write)
def post(self):
resident_name = self.request.get(escape_html("resident"))
user_nacionality = self.request.get("nacionality")
user_SSN = self.request.get(escape_html('SSN'))
user_email = self.request.get(escape_html('email'))
user_driverLicense = self.request.get(escape_html('driverLicense'))
resident_error = ""
SSN_error = ""
driverLicense_error = ""
contract_type = self.request.get("contractType")
owner = self.request.get("owner")
witness = self.request.get("witness ")
if (resident_name and valid_resident(resident_name)) \
and (user_SSN and valid_SSN(user_SSN)) \
and ((not user_email) or (user_email and valid_email(user_email))):
self.redirect('/yourcontract?resident=%s&nacionality=%s&SSN=%s&driverLicense=%s&email=%s&witness=%s&owner=%s' % (resident_name, user_nacionality, user_SSN, user_driverLicense, user_email,
witness, owner))
else:
if not valid_resident(resident_name):
resident_error = "Oh no!!! this resident name isn't valid!"
if not valid_SSN(user_SSN):
SSN_error = "Oh no!!! SSN isn't valid!"
if user_email and not valid_email(user_email):
email_error = "Oh no!!! e-mail isn't valid!"
self.write_form(form % {"resident":resident_name,
"resident_error":resident_error,
"SSN":user_SSN,
"SSN_error":SSN_error,
"driverLicense":user_driverLicense,
"email":user_email,
})
class yourcontractHandler(webapp2.RequestHandler):
def get(self):
geted_resident_name = self.request.get('resident')
geted_user_nacionality = self.request.get("nacionality")
geted_user_SSN = self.request.get('SSN')
geted_user_email = self.request.get('email')
geted_user_driverLicense = self.request.get('driverLicense')
geted_resident_error = ""
geted_SSN_error = ""
geted_driverLicense_error = ""
#geted_contract_type = self.request.get("contractType")
geted_owner = self.request.get("owner")
geted_witness = self.request.get("witness")
geted_contractType = self.request.get("contractType")
self.response.out.write(yourcontract % {"resident":geted_resident_name,
"nacionality":geted_user_nacionality,
"SSN":geted_user_SSN,
"SSN_error":geted_SSN_error,
"driverLicense":geted_user_driverLicense,
"email":geted_user_email,
"witness ":geted_witness ,
"owner":geted_owner,
"contractType":geted_contractType
})
app = webapp2.WSGIApplication([('/', MainHandler), ('/yourcontract', yourcontractHandler)],
debug=True)
答案 0 :(得分：6)
你应该使用合适的模板系统。 Jinja2包含在AppEngine中。
但与此同时，您的问题是您的模板是ASCII但您的数据不是（无法判断它是utf-8还是unicode）。简单的解决方案是为每个模板字符串添加u前缀，使其成为Unicode。
但是，你应该使用一个合适的模板系统。
答案 1 :(得分：4)
这里有解决方案。
>>> "t".decode("utf-8")
u't'
>>> "\x81".decode("utf-8")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "encodings/utf_8.py", line 7799, in decode
UnicodeDecodeError: 'utf8' codec can't decode byte 0x81 in position 0: unexpected code byte
>>> "a\x81b".decode("utf-8", "replace") # this will decode better and the right way.
u'a\ufffdb'
答案 2 :(得分：1)
将默认编码器设置在代码顶部
位于/google/appengine/tools/appcfg.py中的appcfg.py
第73行添加
import sys
reload(sys)
sys.setdefaultencoding("ISO-8859-1")