我有一个非常简单的服务器。我将Python 2.7与web.py一起使用。
基本上,我的代码如下所示:
urls = ("/endpoint", "Endpoint")
class Endpoint(object):
def GET(self):
return "End point"
def POST(self):
data = web.data()
web.header('Content-Type', 'application/json')
result = json.loads(data)
logging.info("[Server] Endpoint POST with payload: " + json.dumps(result))
return "Endpoint POST"
我通过发出如下命令来测试此服务器:
echo '{"field": "test"}' | curl -d @- http://my.ip.number:port/endpoint
我尝试了服务器发出POST请求的其他方法。我也试过从终端和浏览器发出请求。
在所有情况下,我都会遇到这个非常奇怪的错误。
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/web.py-0.37-py2.7.egg/web/application.py", line 239, in process
return self.handle()
File "/usr/local/lib/python2.7/dist-packages/web.py-0.37-py2.7.egg/web/application.py", line 229, in handle
fn, args = self._match(self.mapping, web.ctx.path)
File "/usr/local/lib/python2.7/dist-packages/web.py-0.37-py2.7.egg/web/application.py", line 427, in _match
for pat, what in mapping:
ValueError: need more than 1 value to unpack
为什么会发生此错误,我该怎么做才能阻止它?
谢谢!
编辑1:
显示回溯后,我也明白了:
192.168.46.1:51390 - - [16/Mar/2016 12:54:08] "HTTP/1.1 GET /favicon.ico" - 500 Internal Server Error
IP和端口都不是我正在使用的。
编辑2
#!/usr/bin/python
# -*- coding: utf-8 -*-
# Unicode
from __future__ import unicode_literals
import sys
reload(sys)
# -----
# Logging
import logging
logging.basicConfig(level=logging.INFO)
# -----
# Libs
import web
import json
# -----
urls = ("/", "Index",
"/endpoint1", "EP1"
"/endpoint2", "EP2")
class Index(object):
# In the browser, this displays "Index", but also causes the error on the server side.
def GET(self):
return "Index"
# Doesn't do anything, but causes the error
def POST(self):
data = web.data()
web.header('Content-Type', 'application/json')
result = json.loads(data)
logging.info("[Server] Index " + json.dumps(result))
return "Index POST"
class EP1(object):
def GET(self):
return "EP1"
def POST(self):
data = web.data()
web.header('Content-Type', 'application/json')
result = json.loads(data)
logging.info("[Server] EP1 " + json.dumps(result))
return "EP1 POST"
class EP2(object):
def GET(self):
return "EP2"
def POST(self):
data = web.data()
web.header('Content-Type', 'application/json')
result = json.loads(data)
logging.info("[Server] EP2 " + json.dumps(result))
return "EP2 POST"
if __name__ == "__main__":
logging.info("[Server] Starting server.")
app = web.application(urls, globals())
app.run()
这就是我的服务器的样子。
我像这样启动服务器:
python server.py 0.0.0.0:7331
如果我从浏览器访问服务器的根端点,我会得到"索引"并且错误仍然存在。其他两个端点不会返回任何内容并导致错误。
答案 0 :(得分:1)
你在第二行错过了一个逗号:
urls = ("/", "Index",
"/endpoint1", "EP1"
"/endpoint2", "EP2")
应该是这样的:
urls = ("/", "Index",
"/endpoint1", "EP1",
"/endpoint2", "EP2")
没有逗号会发生什么事情是Python将两个字符串连接在一起而没有逗号。
因此,使用您的代码,urls
实际上是
("/", "Index", "/endpoint1", "EP1/endpoint2", "EP2")