解决python3中自定义wsgi函数,make_server函数报错的问题

发布时间：2020-12-17 07:52:12 所属栏目：Python 来源：网络整理

导读：#coding:utf-8from wsgiref.simple_server import make_serverdef RunServer(environ,start_response): start_response('200 OK',[('Content-Type','text/html')]) return 'h1Hello,web!/h1'if __name__ == '__main__': httpd = make_server('localhost',800

#coding:utf-8

from wsgiref.simple_server import make_server

def RunServer(environ,start_response):
  start_response('200 OK',[('Content-Type','text/html')])
  return '<h1>Hello,web!</h1>'

if __name__ == '__main__':
  httpd = make_server('localhost',8000,RunServer)
  print ("Serving HTTP on port 8000...")
  httpd.serve_forever()

这段代码在python2.7中可以运行，到python3.4中运行，就开始报错，报错内容如下：

Serving HTTP on port 8000...
127.0.0.1 - - [12/Apr/2016 16:44:17] "GET / HTTP/1.1" 200 0
Traceback (most recent call last):
File "C:Python34libwsgirefhandlers.py",line 138,in run
self.finish_response()
File "C:Python34libwsgirefhandlers.py",line 181,in finish_response
self.write(data)
File "C:Python34libwsgirefhandlers.py",line 267,in write
"write() argument must be a bytes instance"
AssertionError: write() argument must be a bytes instance
127.0.0.1 - - [12/Apr/2016 16:44:17] "GET / HTTP/1.1" 500 59
Traceback (most recent call last):
File "C:Python34libwsgirefhandlers.py",in write
"write() argument must be a bytes instance"
AssertionError: write() argument must be a bytes instance

During handling of the above exception,another exception occurred:

Traceback (most recent call last):
File "C:Python34libwsgirefhandlers.py",line 141,in run
self.handle_error()
File "C:Python34libwsgirefhandlers.py",line 369,in handle_error
self.finish_response()
File "C:Python34libwsgirefhandlers.py",line 275,in write
self.send_headers()
File "C:Python34libwsgirefhandlers.py",line 332,in send_headers
if not self.origin_server or self.client_is_modern():
File "C:Python34libwsgirefhandlers.py",line 345,in client_is_modern
return self.environ['SERVER_PROTOCOL'].upper() != 'HTTP/0.9'
TypeError: 'NoneType' object is not subscriptable

During handling of the above exception,another exception occurred:

Traceback (most recent call last):
----------------------------------------
Exception happened during processing of request from ('127.0.0.1',60566)
File "C:Python34libsocketserver.py",line 305,in _handle_request_noblock
self.process_request(request,client_address)
File "C:Python34libsocketserver.py",line 331,in process_request
self.finish_request(request,line 344,in finish_request
self.RequestHandlerClass(request,client_address,self)
File "C:Python34libsocketserver.py",line 673,in __init__
self.handle()
File "C:Python34libwsgirefsimple_server.py",line 133,in handle
handler.run(self.server.get_app())
File "C:Python34libwsgirefhandlers.py",line 144,in run
self.close()
File "C:Python34libwsgirefsimple_server.py",line 35,in close
self.status.split(' ',1)[0],self.bytes_sent
AttributeError: 'NoneType' object has no attribute 'split'
----------------------------------------
----------------------------------------
Exception happened during processing of request from ('127.0.0.1',60568)
----------------------------------------
127.0.0.1 - - [12/Apr/2016 16:44:18] "GET / HTTP/1.1" 200 0
Traceback (most recent call last):
File "C:Python34libwsgirefhandlers.py",in write
"write() argument must be a bytes instance"
AssertionError: write() argument must be a bytes instance
127.0.0.1 - - [12/Apr/2016 16:44:18] "GET / HTTP/1.1" 500 59
Traceback (most recent call last):
File "C:Python34libwsgirefhandlers.py",another exception occurred:

Traceback (most recent call last):
File "C:Python34libsocketserver.py",self.bytes_sent
AttributeError: 'NoneType' object has no attribute 'split'

猛地一看，这么多报错，一下就蒙圈了，各种google百度，各种查，google到时能查到一些，

但是英文不好，也看不太明白，百度查到的都是垃圾，根本就没用，最后硬着头皮，一点一点看源码。

首先，根据第一行的提示：

File "C:Python34libwsgirefhandlers.py",in run
self.finish_response()

我这里用的编辑器是pycharm，找到handlers.py文件的138行，按住ctrl点击文件中的finish_response()方法，

就找到self.finish_response()定义的位置了。根据第二条提示：

File "C:Python34libwsgirefhandlers.py",in finish_response
self.write(data)

发现是write方法出现错误，再按住ctrl点击write方法，找到定义write方法的位置，发现第一行就定义了一条报错：

assert type(data) is bytes,

"write() argument must be a bytes instance"

对照上面的报错信息，发现可能是变量data的类型，不是bytes，所以在handlers.py181行代码self.write(data)上面加一句：

data=data.encode(),再次刷新程序，发现所有报错居然都没了，程序正常运行。

以上这篇解决python3中自定义wsgi函数,make_server函数报错的问题就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持编程小技巧。

（编辑：李大同）

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